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Weng, Wei-Chung. "Taguchi's method for optimizing electromagnetic applications /." Full text available from ProQuest UM Digital Dissertations, 2007. http://0-proquest.umi.com.umiss.lib.olemiss.edu/pqdweb?index=0&did=1414125771&SrchMode=1&sid=1&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1221160089&clientId=22256.
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Gibson, Myles. "The Heat Treatment of Nickel Titanium - An investigation Using Taguchi's Method of Optimisation." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-28769.
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Krajčovič, Ján. "Zpětná analýza sypané přehradní hráze a predikce jejího chování při mimořádných zatěžovacích stavech." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-391964.
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Diplomová práce představuje vytvoření softwarového 2D MKP modelu přehrady Slezská Harta v České Republice za pomoci softwaru PLAXIS 2D. V úvodu práce je analýza vodní nádrže, vytvořené jako zásobárna vody a protipovodňové dílo. Analýza sleduje geomorfologii, geologii, konstrukci tělesa hráze, použité materiály a metody, a stávající monitorovací zařízení. Pro pochopení tvorby 2D MKP modelu jsou předloženy a definované metody použitých analýz - metoda konečných prvků, analýza prosakování, materiálové modely, citlivostná analýza. Následně byla definována tvorba struktury modelu - určení posloupnosti použitých analýz, definování vstupních dat a mezních podmínek a tvorba kalibračního segmentu. V závěrečné části práce je analýza dosažených výstupů rozsáhlého testování modelu, jejich korelace s reálnými naměřenými hodnotami a celkové shrnutí přínosu vytvořeného modelu pro jeho využití při předpovídání chování přehrady v extrémních případech.
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Islam, Ziaul. "A design of experiment approach to tolerance allocation." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1179428292.
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Savarese, Paul Tenzing. "New design comparison criteria in Taguchi's robust parameter design." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-06062008-171200/.
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Shah, Parthiv Akshay. "Forecasting using the T-method." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2008. http://scholarsmine.mst.edu/thesis/pdf/Shah_Parthiv_09007dcc80681cd6.pdf.
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Thesis (M.S.)--Missouri University of Science and Technology, 2008.Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed June 18, 2009) Includes bibliographical references (p. 36-37).
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Belavendram, Nicolo. "Taguchi methods for manufacturing systems design." Thesis, University of the West of Scotland, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306300.
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Green, Jeremy James. "Taguchi methods in internal combustion engine optimisation." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52475.
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Thesis (MScEng)--University of Stellenbosch, 2001.ENGLISH ABSTRACT: Statistical experimental design techniques are powerful tools that are often approached with suspicion and apprehension by experimenters. The trend is to avoid any statistically structured and designed experimentation program, and to rather use the traditional method of following ones "gut feel". This approach, more often than not, will supply a satisfactory solution, but there is so much more information availablefor the same amount of effort. This thesis strives to outline the method and application of the Taguchi methodology of experimental design. The Taguchi method is a practical, statistical experimental design technique that does not rely on the designer's knowledge of the complex statistics typicallyneeded to design experimental programs, a fact that tends to exclude design of experiments from the averageengineers' toolbox. The essence of the statistical design of experiments is this: The traditional method of varying one variable at a time and investigating its effect on an output is no longer sufficient. Instead all the input variables are varied at the same time in a structured manner. The output trends resulting from each input variable are then statisticallyextracted from the data in the midst of the variation. Taguchi method achieves this by designing experiments where every level of every input variable occurs an equal number of times with every level of every other input variable. The experimental designs are represented in orthogonal arrays that are chosen and populated by the experimenter by following a simple procedure. Four case studies are worked through in this text and, where possible, compared to the "traditional" approach to the same problem. The case studies show the additional information and time savings availablewith the Taguchi method, as well as clearlyindicating the importance of using a stable system on which to do the experiments. The Taguchi method generated more information in fewer experiments than the traditional approaches as well as allowing analysis of problems too complex to analysewithout a statisticaldesign of the experimentation procedure.
AFRIKAANSE OPSOMMING: Statistiese eksperimentele ontwerptegnieke is besonder kragtige instrumente wat baie keer met agterdog deur ekspermenteerders beheen word. Die neiging is om enige statistiese gestruktureerde and ontwerpte eksperimentele program te vermy, en om liewer die tradisionele metode, wat op 'n mens se intuïsie staatmaak, te gebruik. Hierdie benadering sal baie keer 'n bevredigende oplossing gee, maar daar is veel meer inligting vir dieselfde hoeveelheid inspanning verkrygbaar, wanneer die Taguchimetode gebruik word. Hierdie tesis strewe om die metode en toepassing van die Taguchimetodologie van eksperimentele ontwerp voor te lê. Die Taguchimetode is 'n praktiese statistiese eksperimentele ontwerptegniek .wat nie op die ontwerper se kennis van komplekse statistiek om eksperimentele programme te ontwerp berus nie. Hierdie komplekse statistiek neig ook om eksperimentele ontwerp van die gemiddelde ingenieursvaardigehede uit te sluit. Die kern van statistiese eksperimentele ontwerp is die volgende: Die tradisionele metode van een veranderlike op 'n slag te varieer om die effek op die uitset te ondersoek, is onvoldoende. In plaas daarvan, word al die insetveranderlikes gelyktydig gevarieer in 'n gestruktureered manier. Die neigings van elke veranderlike is dan statisties ontleed van die data ten midde van die variasie van al die ander veranderlikes. Die Taguchimetode bereik die ontwerpte eksperimente deur elke vlak van elke insetveranderlik in 'n gelyke aantal keer met elke vlak van elke ander insetveranderlike te varieer. Hierdie is verteenwoordig deur ortogenale reekse wat gekies en gevul is deur 'n eenvoudige wisselpatroon te volg. Vier gevallestudies is deurgewerk en, waar moontlik, vergelyk met die tradisonele siening van dieselfde probleem. Die gevallestudies wys hoe toereikbaar die additionele inligting in die Taguchimethode toepassings is. Hulle beklemtoon ook die belangrikheid van 'n stabiele sisteem waarop die eksperimente berus. Die Taguchimetode het meer inligting verskaf met minder eksperimente as die tradisionele toenaderings, en ook toegelaat dat die analise van probleme, te kompleks om te analiseer sonder om 'n statistiese ontwerp van eksperimentele prosedure te volg, opgelos kon word.
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Yen, Ching-ho, and 嚴建和. "Taguchi's Idle Column Method." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/98603447824619884617.
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Hsieh, Yu-Che, and 謝毓哲. "Applying Taguchi's Method to the Optimum Parameter Traditionalnoodlefactory Design for Udon noodle." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/42025957058847611617.
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碩士國立雲林科技大學
工業工程與管理系
104
Traditional Taiwanese’s daily food consumption before the Japanese colonization age, bases on the consumption of rice and grains. It is during the period of colonization, and post war period, where Mainland China’s population moved to Taiwan at mass scale, that Japanese’s method of noodle making and Chinese noodle making method from different part of mainland china were imported to Taiwan. Since then, Taiwanese noodle making culture and skills had developed, and became highly diversified and merged. Figures records, Taiwanese noodle consumption had increased from 3% in 1945 to over 20% in 2015. Clearly, there is a huge increase in the population of noodle diet, and those noodle consumptions mainly bases on Yóu miàn, Udon, and Yang Chun mian. This study investigate the progress of the traditional small scale noodle factory on the improvement of Udon making. Experiment base on Taguchi quality research method, make use of L9(34) experiment, with 4 controlling factors and 3 selections on reading scales, repeated 10 times for each settings, in order to record readings for the amount of salt water, speed and duration of stir, and total operate duration for dough production. This study aims to find out the most balanced formula for producing Udon. Thus, one can act to improve the quality and quantity of Udon making, and reduce the spending’s on the cost of time and electricity. According to this investigation, by using Taguchi quality research method, it is possible to improve the quality of Udon making, reduce cost by 1.2%, and raise quantity produced by 28%. It is therefore effective in the improving of the making of Udon. Key words：Taguchi Techniques for Quality Engineering, Process Capability, Udon, Humidity
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Chang, Chin-Sheng, and 張金生. "Application Of Taguchi's Quality Engineering Method In Electronic Industry--A Case Study of COMPEQ." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/43127759532471621238.
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Cheng, Hong-Chi, and 鄭弘奇. "Application of Taguchi's method and response surface methodology in the reflow process of SMT." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/91451129928714349979.
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碩士龍華科技大學
機械工程系碩士班
102
Surface Mount Technology (SMT) is one of the necessary manufacture procedure for electronic products. Due to the electronic product become thinner and lighter, the component will be smaller, and SMT process becomes more important. The basic SMT process is solder printing, parts placement, and reflow soldering, and the reflow soldering is the key to product reliability. In the past, we set reflow oven parameters base on the profile which solder paste manufacturers provided, then engineer adjusted the reflow oven setting to achieve it by their owned experience. It wastes time and need repeated action. When SMD component become smaller and smaller, the soldering strength also become more and more important. This study will use Tagochi method and response surface methodology to set 4 major process parameter factor: highest temperature, preheat time, reflow time, cooling rate, correspond to welding strength, and each factor set 3 reasonable level, per orthogonal arrays to make experiment. Through analysis by response surface method, we get the predictive equation for welding strength evaluation, the result shows that highest temperature is the most important significant factor to influence welding strength. According this equation, we can quickly and easily to find the proper parameter for new product reflow process parameter, then produce a good product and has good reliability.
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Yang, Chun-Tsai, and 楊春財. "Optimum Wire Bonding Parameters for Tri-Tier Bond Pitch 25 μm by Taguchi's Method." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/9dhjpr.
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碩士國立成功大學
工程科學系專班
92
With advances in electronic technology development and consumer needs for high performance electronic components, the manufacturers match consumer’s need by producing light, thinner, short and small components with more functions. Thus, the packaging technology process is looking for high pin count, small form factor, low cost assembly method. Reducing bond pad pitch is always the first step to increase die output, this research focuses on the fine pitch bonding process to improve assembly yield. TEBGA ( Thermal Enhanced Ball Grid Array ) components are selected for this study. Taguchi's method is used to obtain key factors, levels and optimum parameters to increase wire bonding process capability, Cpk( process capability index ) and assembly yield. The assembled results show that the first bond average ball shears strength was increased from 12.8 g to 14.1g, ball left defect average ppm was reduced from 1624 ppm to 685 ppm, Cpk average was improved from 1.3 to 1.9. The second bond average bond pull strength was increased from 6.26 g to 6.44 g, 2nd bond left defect average ppm was reduced from 668 ppm to 228 ppm, Cpk average was also increased from 1.3 to 2.0.
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Lee, Chieh-Wen, and 李介文. "Application of Taguchi's Method and Response Surface Methodology in the Lamination Process of Touch Panel." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/31629496525826272443.
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碩士龍華科技大學
機械工程系碩士班
104
As the popularity of LCM (liquid crystal display module) used for part of smart phone, the technique about LCM full lamination is an absolutely necessary process for touch screen devices. The larger screen makes lower yield rate and higher cost. Therefore the importance about LCM full lamination process is significant. Three procedure of LCM full lamination were involved: the touch panel lamination with OCA glue (optical clear adhesive), the part (touch panel with OCA glue) laminate with LCD and the auto-clave processes. The key step which related with yield rate is the part laminate with LCD (liquid crystal display) process. It is the major goal for the manufacture engineering to fine the key parameters of the LCM full lamination. But the larger the screen’s size, the lower of yield rate. Therefore the parameters of LCM full lamination become more significant during the manufactured procedure. OCA glue is the key component which used for touch panel laminate with LCD. The advantage of OCA glue is convenient and efficient to shape it. But LCM bubble and peel off issues make the cost increasing when reworking it. In this study, we use the Taguchi method and the response surface methodology to study the influence of the roller hardness, the roller pressure, the speed of roller and the degassing pressure in LCM full lamination process. We choose three factors which related with lamination in orthogonal arrays to verify LCM bubble and adhesion failure rate. Then the response surface methodology was applied to find the equation of the number of bubble and the adhesion force. The primary parameter to influence LCM bubble and adhesion is the roller pressure. And the response surface methodology can use to find the optimal parameters of lamination which will reduce the failure rate of LCM bubble and the poor adhesion issues. Therefore to improve lamination yield rate and decrease the scrap of touch panel and LCD.
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Chen, Jai-Qing, and 陳佳慶. "Application of grey relation method and Taguchi's methodology in the solder paste printing process of SMT." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/49353039886049729608.
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碩士龍華科技大學
機械工程系碩士班
102
Nowadays, most electronic products put their emphasis on outstanding functionality and diversity. Also, the size of products tends to lighter and thinner. Therefore, SMT ( Surfance Mount Technology) plays an important role in production. There are three major stpes in SMT: (1) Screen printer (2) Component placement and (3) Reflow oven. Among the entire SMT production process, Screen Printer is the most important key at quality and stability of the entire production. This study does analysis on several process parameters with a little experiment data, adopted table orthogonal experimental design and simple ANOVA from Taguchi Methods to get the optimal height parameter A3B2C1D1 and the optimal area parameter A2B1C2D1, then brought the height and area results from Taguchi Methods into these in order to carry grey relation. It compared the situation and correlation from changes of two factors, and found the optimal print parameter, which is A2B2C1D1 ( printing pressure 80N, printing speed 100 mm/sec, printing snap-off distance 0.2mm and printing snap-off speed 2mm/sec). The results accord with those states from thories and also conform to the goal vales.
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Lu, Po-Jen, and 盧柏任. "Application of Taguchi's method and response surface methodology in the solder paste printing process of SMT." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/41138400733458754055.
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碩士龍華科技大學
機械工程系碩士班
102
In today’s electronics industry, consumers are increasingly demanding higher quality 3C products, including products with slimmer designs. This trend highlights the importance of surface mount technology. This technology can be roughly divided into three steps: stencil printing, component placement, and solder reflow. The first step, stencil printing, is especially crucial because it may cause the failure of subsequent processing if the printing quality is low. In addition to having to spend more time, redoing the work would also mean spending more money. This study used a combination of the Taguchi and response surface methods for the solder paste printing process’ technical volume, choosing four parameters (squeegee pressure、squeegee speed、snap-off height and snap-off speed), with each parameter containing three levels. Then the study used L9(34) orthogonal array, followed by Taguchi’s nominal-the-best method to analyze, with the target value set at 2073600 μm3. The optimum parameters achieved were: squeegee pressure 80 N, squeegee speed 50 mm/s, snap-off height 0.2 mm, and snap-off speed 2 mm/s. In the end, the results from the response surface regression analysis were used to deduce the predicted volume of solder paste and the optimum parameters. This method allowed us to achieve a paste volume predicted value of 1899124 μm3. The result showed that the predicted values are closer to our target values.
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Chang-Ji, Li, and 李常吉. "Optimal Design of the Operating Parameters of Interrupting of Breaker in the GIS Based on Taguchi's Method." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/51389742959787720122.
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碩士國立高雄應用科技大學
機械與精密工程研究所
98
In this thesis, optimal design of the characteristics of interrupting of breaker in the GIS(Gas Insulated Switchgeer)basing on Taguchi's Method [small-the-better] from the experimental results of GISs three control factors and three levels .The control factors include the DC power supply, operating pressure and hook gap that impacting on the operating time of circuit breaker closely ,moreover, collecting the test data of 161kV GISs which having been operating at 12 substations ,at Taiwan Power Company Kao- ping Power supply Branch , in the year of 90 to 97 ,each GIS depicting a same voltage level ,air pressure operating mode and line bay.The Results of optimal design of DC power supply , operating pressure and hook gap should be 140V DC ,16.5kg/cm2•G and 2.8mm or 3.2mm. Though there is no consistency between the practical results and the current situation. However, the optimal design of the operating parameters of interrupt- ing of breaker in the GIS, can be used as the power system circuit breakers planning, operation, and maintenance of important reference.
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Huang, Chun-shin, and 黃雋心. "Application of Grey Relational Analysis,Taguchi's Method and Response Surface Methodology in Multi-objective Quality Characterization Optimization." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/9rjw48.
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碩士國立高雄大學
亞太工商管理學系碩士班
97
Taguchi Method’s Robust Design has been applied in a various range of industrial applications. However, the major part only aims at the question of single performance characteristics optimization. More than one quality characteristics must be simultaneously considered to effectively improve the product quality due to the increasing complexity of product design. Optimizing each quality characteristic separately may not result the optimality for the entire production. More often, considering one quality characteristic may conflict with the other. The more the number of the performance characteristics, the stronger the correlation of them. It also brings the engineer the difficulties of resolving the performance characteristics conflict. This article undertakes the Optimization of multiple quality characteristics using the combination of Taguchi Method and Grey Relational Analysis. If the factorial level belongs to the continuous factor, this work will find the best setup according to the Response Surface Methodology to confirm the valuable combination. In order to show the effectiveness and practicality of the proposed algorithm, this article uses the two cases – Substrate Laser Displacement Measurement and Optimal Coating of Photoresists of LCD process respectively. The results show that this method can find the best production process parameter level combination of the two processes. Demonstrating the effectiveness of the research, helps the company to improve the quality of product effectively.
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Lin, Wen-Feng, and 林文鋒. "The Application of Taguchi's Method on the Pararmeter Design of Cutting Condition in SUS 304 Stainless Steel Machining." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/61925954361944698716.
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碩士國立雲林科技大學
工業工程與管理研究所碩士班
91
ABSTRACT In order to reduce the number of experiments, an orthogonal array from the Taguchi′s experimental method will be utilized to design the sets of cutting conditions such as cutting velocity, feed rate, depth of cut and nose radius of the tool. Based on the proposed methodology, good machined surface roughness and set of optimum cutting condition can be obtained through the machining experiment by CBN tool and JIS SUS 304 series stainless steel. As a result, the subsequent grinding process may be neglected, the procedure for manufacturing production can be simplified and the machining time for the components can be reduced. Experiment error and variance analysis for the minimum expected character of S/N ratio are assessed by the robust design of Taguchi′s experimental method, the good quality index of surface roughness and the optimum parameter of cutting conditions can be acquired and also can be extended to the academic, industrial and government units for the reference of teaching, research and production. The results show that the range of surface roughness is within Ra 0.070~0.333μm, the optimum cutting conditions sets are A2, B3, C2 and D2 through the averaging analysis and control factor for quality characteristic response graph and table. Where the parameter for A2 set the cutting velocity is 300m/min, for B3 set the feed rate is 0.06mm/rev, for C2 set the depth of cut is 0.15mm and for D2 set nose radius is 0.8mm. Furthermore, the feed rate is the most important control factor dominates the S/N signal to noise ratio. Keywords: surface roughness, Taguchi method, orthogonal array, stainless steel, CBN
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Chiou, De-Zeng, and 邱德正. "Using Bootstrap Method to Construct the Confidence Intervals of the Taguchi's Larger-the-Better and Smaller-the-Better Signal-to-Noise Ratios." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/80943939387055293891.
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碩士國立雲林科技大學
工業工程與管理研究所碩士班
91
Signal-to-Noise Ratio(S/N Ratio) is the important measurement of the quality performance in the Taguchi Method, because the purpose of the parameter design is to determine the optimum factor level combination, and it is according to the Signal-to-Noise Ratios, so , it’s very important to estimate the S/N Ratios rationally. However, because of considering the cost、time and the experimental configure, we cannot but use the less samples to estimate the statistic and implement the continuous statistical inference, moreover, the statistical distributions of the Signal-to-Noise Ratios are very complicated, So,it’s very hard to use the exact point estimate in statistical inference, Therefore, there are many researcher try to use the interval estimate to instead of the point estimate. Bootstrap Method is a nonparametric repeatedly sampling method, there is no statistical assumption on it’s population, and it used simulation to estimate the parameters, so, it doesn’t have to prove any mathematical formula, and it’s very convenient and accurate in estimating the parameter and constructing the confidence interval. Therefore, in this paper, we used Bootstrap Method to construct the 95% confidence intervals of the larger-the-better and smaller-the-better S/N Ratios for instead of the point estimate, and we changed the parameters to discuss the effect upon the coverage proportions、average width and standard deviation of the width；and further, we used the Burr distribution to transform the non-normality process, and according to different combination of skewness and kurtosis conditions to discuss the influence of the coefficients of skewness and kurtosis on the results.
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Chen, Tseng-Pi, and 陳增必. "Applying Taguchi’s Method to Test Digital TV Software." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/55nw92.
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碩士國立臺北科技大學
電機工程系研究所
96
With the coming of the digital era, software becomes more and more complex. In order to guarantee the software reliability, software should be tested throughout all before released it to customers. The traditional software testing method generates test items based on the past experiences of testers and developers. However, this traditional approach has two problems. First, the steps of generating test items are not standardized. Thus, it takes much time for generating test items. Secondly, testers and developers may focus only on testing the most frequently used features of the software due to their past test experiences. Thus, this will cause lower coverage rate for testing other features of the software. This thesis uses a robust design approach to generate the test items for the digital TV software. First, analyze each function of the digital TV to get its control factors and levels. Next, optimize the control factors and levels based on the digital TV characteristics. Then, select the appropriate orthogonal array established by Taguchi in accordance with the control factors and levels. Finally, automatically generate test items according to the selected orthogonal array. Experiment results show that the proposed approach can reduce the lead time in generating test items and increase the coverage rate for testing software. Furthermore, the standard process of generating test items is established.
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Hsu, Chey-yuan, and 許哲源. "Solder balls Parameters Optimization by Using Taguchi’s Method." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/48690347459993977383.
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碩士國立屏東科技大學
工業管理系所
100
Student ID：N9657004 Title of thesis：Solder balls Parameters Optimization by Using Taguchi’s Method Total page：66 Name of Institute：National Pingtung University of Science and Technology, Institute of Industrial Management Graduate date：June, 2012 Degree Conferred：Master Name of student：Chey-yuan Hsu Adviser：Yun-Cheng Huang The contents of abstract in this thesis： The trend of integrated circuit is toward the research and manufacturing of lighter weight, thinner, smaller size as well as multiple feet, in order to fit the demand from markets. To face advanced technology of ball grid array, the requirement of applying solder ball melting into package process between melting integrated circuit and PCB board, is getting critical and important. As it’s time consuming and cost expensive by running the adjustment of process parameters based on experiences at the case study company, the research utilizes Taguchi Method to determine optimizing parameters for solder ball formation. The research sieves out the temperature of crucible, the supplying pressure of Nitrogen and oscillation frequency of oscillator as controlled factors, by applying full-factor Design Of Experiment (DOE) that had larger crossing range and scale, Taguchi Method that had smaller crossing range and territory as well as Orthogonal Array Approach, and then analyzed the data from experiments by Minitab Software to get better combination for the case study company. The result of the research proved that the optimizing combination of parameters for formation are 262℃temperature of crucible, 0.28Mpa of the supplying pressure of Nitrogen and 2022 oscillation frequency. The yield rate of formation for solder ball increased from 62% to 91%, the average of improving and continuous rate increased to 29%, which the capability of process are improved significantly in the case study company, And after the experiment cost-effectiveness analysis and calculation of annual savings of the cost of loss of NT $ 1,523,242.9.
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Chen, Po-kuang, and 陳柏光. "Wire Bonding Parameters Optimization by Using Taguchi’s Method." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/05439336593088751228.
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碩士逢甲大學
資訊電機工程碩士在職專班
98
Abstract On the development of electrical technology and consumer’s demand on the electric products, humans never stop chasing on the trend of high performance and complex. Based on the innovation of SOP (small outline package) technology, it is always on the movement of high pincounts (I/O), miniaturization and low cost. During the process of wire bonding, it uses gold wire to connect chips and substrates in order to bridge the electric signals in the Integrated Circuits, IC. The wire bonding process of semiconductor is on the progress of developing the high precision wire bonding technology of the bond pad fine pitch; furthermore, it also focuses on upgrading the skill of wire bonding. Therefore, the parameters are extremely important on the innovation of manufacturing process. Based on the optimization parameters, it is not only reducing the timeframe of innovation process, but it can also decrease the cost. Regarding to the variable quality characteristics on products and the optimization parameters, most of engineers make their determination only relied on their own personal experiences based on its different quality characteristics to distinguish its optimization combination for each characteristic. Therefore, an important subject what this industry is most concern about is how to utilize the optimization combination to discover the optimization parameters. This research will be focused on the operation of wire bonding via experimenting Taguchi’s method to determine the key factors, levels and optimization parameters. To analyze the strength of first bonding, it can apply the gold ball shear test and the quality characteristics of gold ball size. And then, the gold wire pull test can examine the strength of second bonding. As a result of the experiment, the optimization quality characteristics can be verified.
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Chang, Wen-Zhang, and 張文昌. "The Application of Taguchi Method on Product Failure AnalysisThe Application of Taguchi Method on Product Failure AnalysisThe Application of Taguchi Method on Product Failure AnalysisThe Application of Taguchi Method on Product Failure Analysis Th." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/91243663986382607611.
Full textAbstract:
碩士華梵大學
工業管理學系碩士班
94
In general, the product tests are usually conduted before failure, but the commodity failure mode analysis is conducted to evaluate whether the defectives exist or not in products after accident or problems were occured . So that, there are different natures and technical levels, the latter is more complicated than the former. The objective of this research is to improve the quality of commodity failure mode analysis. First, it is mainly applicable of Taguchi quality engineering with static characteristic and design of experiments . Adopting L4 (23) orthogonal array and Mircosoft Excel software and it is expected with the minimum number of experiments to find the worst operation conditions of the case product. Finally, the results of this research are not only applicable of Taguchi quality engineering with static characteristic and design of experiments to conduct the commodity failure mode analysis but also the important references for the Authority, Inspection body, Product Cetification Body and Laboratory to set up the model of conducting commodity failure mode analysis.
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Shieh, Jia-Shing, and 謝嘉興. "Backlight Module Design Using Taguchi Method." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/02211275474569913294.
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碩士國立高雄應用科技大學
機械與精密工程研究所
99
This work investigates the optimal structure for decrease the standard deviation of brightness for backlight module and researches the interactions among the constructional factors. It belongs to automatic control, the philosophy of Taguchi method is adopted and the L27 orthogonal array is used to arrange the experiments. Visual Basic program is used to set parameters, and simulated by LightTools though Windows Com, last step, the data base will be built in Excel. The best combination of constructional factors is determined by different goals and the interactions among the constructional factors. It is the best combination of constructional factors that decreasing the standard deviation and the brightness is acceptable. Finally, the best combination of constructional factors is optimized by LightTools. Four cases are studied in this research. In the first one, the LED, Nichia NJSW107, is used as the light sources, and three constructional factors, DotRadius, DotRadiusIncrement, and the separation of light sources, are chosen, each has three levels. At first, the system is simulated with ten million rays and results in an asymmetrical intensity distribution which should be symmetrical for such a system. The second simulation with 360 million rays gives better symmetrical results. In the first case, the light efficiency is only 13.57% that may be due to the big size of the chosen LED. In case two, a smaller LED, Nichia-NSSW004, is used and the separation between the LED and the back light guide is decreased. 45 million rays are traced. The light efficiency results in 68.84%. However, we also discover that the light uniformity close to the light source is decreased. The interactions among constructional factors are not evident which may because of the improper chosen of factors. New factors are used in the next. In the third case, four factors, DotRadius, the distance among the DotRadius, the distance among light sources, and DotRadiusIncrement, are used and 26 million rays are traced. Two obvious interactions are observed: one is between the factor DotRadius and the distance among light sources, and the other is between DotRadius and DotRadiusIncrement. The optimal designed system considering interactions among factors is much better than that without considering interactions. Although the brightness in the optimal design is somewhat less than that of the original design, the former has decreased standard deviation and improved uniformity as well. In the fourth case, the best system from case three is further optimized by LightTools. The standard deviation and uniformity are both improved. Our study successfully provides efficient procedures to improve the standard deviation and uniformity, and obtain acceptable brightness. It also emphasizes the importance of the interactions among constructional factors.
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Wei-HaoLi and 李偉豪. "Reducing TSV dimensions by Taguchi Method." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/db27kv.
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碩士國立成功大學
工程科學系
105
Moore's Law drives the integrated circuit to continuously increase its circuit density for which 3D stacking technology is essential by the technology of through silicon via (TSV). TSV provides vertical interconnections between stacking dies. However, due to thermal stresses induced by the mismatch of coefficients of thermal expansion (CTE) between the related materials for TSV, structure reliability problems occur such as copper via pumping and interfacial delamination. Previous studies indicate that the induced thermal stress could lead to a piezoresistive effect on silicon which in turn causes undesirable carrier mobility in the device and affects the performance and reliability of the produced chip. In this study, a finite element method was adopted to investigate the stress distribution of TSV under thermal process to examine possible piezoresistive effects TSV on the n-MOS and p-MOS structure by changing the geometry of the structure of TSV, including TSV diameter, TSV aspect ratio, dielectric layer thickness and TSV pitches. The piezoresistive effect of MOS in the silicon lattice directions [100] and [110] was studied for carrier mobility change to determine the range of keep-out zone (KOZ). Taguchi method was used to further optimize the array TSVs to reduce the KOZ range. The results show that the sizes of KOZ of the chip can be significantly reduced to increase the distribution density of TSV of the chip.
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Lee, Wan-tzu, and 李婉慈. "Applying Taguchi’s Method to the Optimum Parameter Design for Printing." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/97423940075920379899.
Full textAbstract:
碩士國立雲林科技大學
工業工程與管理研究所碩士班
101
This research consider the temperature and humidity. The substrate of glass size is 117 x174 x1.1 .The ink types is baking ink. There are eight control factors , Ink mixer speed, Ink mixer time, pressure of the printing blade, the inclination angle of the printing blade, speed of the printing blade, the capacity of the solvents, the capacity of the Ink, and the capacity of the hardener. This study applies Taguchi Method to printing experiment.Jagging and film thickness are the quality characteristic and belonging to Smaller-the-Better characteristic. Using the digital dial gauge and Dino Lite measurement data to calculate the Signal-to-Noise ratio. The combination of Principal Components Analysis and Grey Relational Analysis to design the optimal parameters of printing multiple quality characteristics.
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Tsai, Chia-Hung, and 蔡嘉鴻. "Design of Large-Scale LCD Backlight Modules Using Taguchi’s Method." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/92079054250215531860.
Full textAbstract:
碩士國立彰化師範大學
電機工程學系
96
This thesis applies Taguchi’s Method to design a large-scale liquid crystal display （LCD）backlight-module. The design approach is a type of straight direct-illumination, and the light source of the backlight module is a white light mixed by marketed white light-emitting diodes （LEDs）to substitute traditional CCFLs. Also, the light source modulation and the mold-up of the backlight module are carried out by using the TracePro optical simulation software. This study can effectively reduce the time and mistakes during the research and development process so that the cost of the research and development can be saved. In addition, the parameters of the backlight module, such as the shape and the reflectance of covers, the placement manner of LEDs, the radius of the light-guide hole of the microstructure upon the LED, the spacing on the bottom side, and the outward radius of the microstructure, can be optimized by using Taguchi’s method that both the efficiency and the performance of the module can be regarded, simultaneously, and the luminance distribution with high uniformity and high brightness can be achieved. The simulation result shows that the uniformity of 90.34% with an optical efficiency of 71.36% can be obtained by employing this method to a size of 30-inch direct LED backlight module.
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Wang, Chun-Cheng, and 王俊程. "Using Taguchi’s Method to Enhance the Efficiency of Server Test." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/8nu5mq.
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碩士國立臺北科技大學
電資碩士在職專班研究所
102
Electronic products, in the development stage, need to go through numerous tests and be corrected in order to create a stable product. Therefore, how to minimize number of tests and time to achieve maximum test coverage has become an important factor that shortens the development cycle. In this study, we first discusse the traditional server testing methods and orthogonal array of Taguchi’s method. In the traditional test method, developers are based on historical experience to schedule the traditional test plan. However, it is freqently that, due to personal biases, testsing cover rate is consequently decreased, This condition can be ameliorated by using orthogonal array of Taguchi’s method. In our implementation, we firstly constructed control factor, level and orthogonal array of the test products, to produce orthogonal test plan. In comparison to the traditional test plan, the orthogonal test plan uses fewer number of test cases while achieves maximum test coverage. From the experimental results, it is apparently our method can effectively reduce the test time and shorten the development cycle.
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Ho, Kei-Tai. "Improving Color Filter Quality by Taguchi Method." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0017-1901200710300227.
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Chao-YinChen and 陳昭吟. "Semiconductor Mask Registration Improvement using Taguchi Method." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/74f983.
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碩士國立成功大學
工程管理碩士在職專班
102
To extend Moore’s law of semiconductor industry, photolithography constantly shrink critical dimension to increase integrated circuit density of each die. However, while semiconductor manufacturing is progressing to 40nm and below, the most important problem is the difficulty of lithography overlay control that will influence the limit of production yield, and the mask used for lithography process is also the key factor for lithography overlay quality. Semiconductor mask registration is one of key factors of lithography overlay control. In this thesis demonstrates, we found the mask registration average change 7.7 nm between pre and post pellicle mounting, mask flatness change of the pellicle mounting will induce mask registration inconsistent between pre and post pellicle. In this research, we setup the parameters of pellicle mounting procedure by Taguchi Methods which are used to obtain appropriate parameters to improve mask mounting quality. Experimental results verified the stable parameters could reduce quality characteristics from 6.86nm to 3.22nm and enhance wafer process quality.
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Yang, Shu-Pu, and 楊書僕. "Study eductor plating by using Taguchi Method." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/789r52.
Full textAbstract:
碩士國立交通大學
工學院半導體材料與製程設備學程
107
Abstract Electronic components miniaturization process now, passive component also need to enter the miniature field with active IC, And the key factor that control passive components following the miniaturization process is electroplating. Therefore, how to achieve plating size control effective is most important thing. In this paper study, we discuss the simulation result for known flush fields, from 2007 paper by Shau-Huang, Shiau “Study on the uniformity of coating thickness of the plated electroplating flow field”, we known using entire angle (β=3∘) cone-shaped flow field, it is possible to get better a uniformity on a circular copper sheet, which is applied in the field of smaller passive component size, In this paper, mainly method is DOE (Design of Experiment) used to design a plating bath suitable for square wafers, and finding more robust plating design, from DOE method, first to select important factor selections, and find out best combination through eight basic principles of Taguchi experiment design parameter to find out best combination, after experimental verification, the S/N ratio of the original swing bath is 15.2, and from the DOE optimization is flush plating mechanism has great increase S/N ratio to 25.99,which is more effective to improve the wafer plating thickness uniformity
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CHOU, KUAN-CHIN, and 周冠志. "Design of Flyback Converter Using Taguchi Method." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/84z74q.
Full textAbstract:
碩士建國科技大學
電機工程系暨研究所
107
This thesis proposes a Taguchi’s orthogonal arrays concept of which the efficiency of the flyback converter can be effectively improved by using a simple orthogonal array experimental design as well as a simplified factor response analysis and referring to small quantity of experimental statistics for further analysis. We expect to use the optimal parameter combination obtained by Taguchi Method for enhancing the efficiency of the flyback converter. That is, the Taguchi Method can be used to help us to understand the effects of the design factors including the switching frequency(fs), duty cycle(Duty) and boundary current(Iob) of a flyback converter. In this thesis, we fabricate one flyback converter with input of DC 155V and output of DC 12V/84W based on the best parameter combinations. Using orthogonal arrays L9, the optimal parameter combination is fs:50kHz, Duty:0.3 and Iob:4A. Then, the efficiency test of the flyback converter has been done. The result predicted with Taguchi Method is identical to what we test.
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Chiu, Hui-Shan, and 邱慧珊. "EPS Extrusion Parameters Optimization Using Taguchi Method." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/5dc43m.
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碩士國立虎尾科技大學
創意工程與精密科技研究所
98
Plastic extrusion is the most common technology in plastic industry. To obtain the optimum parameters, we need lots of experiments and experiences to get the value; however, doing experiments take lots of time and even if they ere done, there is theoretical basis to analyze them. Hereby, the purpose of this study is to find out the optimum parameters by using Taguchi Method. We found out the factors affecting the quality of PS extrusion by using Taguchi Method. The major factors to affecting PS extrusion process are as below:(A)Proportion of plastic material, (B)Cooling head temperature, (C)Cooling can temperature, (D)Die Zone 1 temperature, (E)Die Zone 2 temperature, (F)Gas pump RPM, (G)Primary screw RPM, (H)Pull Roll line speed (Experiment: A in 2 level, B~H in 3 level),This experiment using Taguchi L18 orthogonal array, the analysis of samples S/N ratio and variance obtain the optimum parameter for extrusion. The shrinkage improvement is as following: 1.The improvement of volumetric shrinkage could effectively evaluate the defects on the product. 2.Appropriately adjust the control factors could improve the volumetric shrinkage problems. 3.By means of Taguchi method analyzes the best combination of parameter could get the best volumetric shrinkage ratio.
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Li, Ren-Fang, and 李潤芳. "Optimizing Green Hotel Amenities Using Taguchi Method." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/t2rzt4.
Full textAbstract:
碩士國立虎尾科技大學
工業工程與管理研究所
99
Due to the ever increasing deterioration of global warming, the awareness for environment protection has thus been enhanced by the humans. Many commodities, strategies have been fulfilled and improved in compliance with eco-friendly ideology. The eco-friendly hotels have thus been developed. The industry structure of Taiwan has already transformed into service-industry orientation mainly. The composition ratio of tourism in the service industry has been increasing in stable pace accordingly. The hotel industry is commonly assumed as the core of leisure and tourism industry development. However, the government has not yet enacted a set of legal standards regulating the emerging eco-friendly hotels. The major claim of this research is that legal standards shall be enacted in compliance with the development trend of environment protection globally for regulating and governing this industry development.This research also conducted survey on hotel-room courtesy kits and hotel guests’ mental expectations concerning tourist accommodation. The reference document collection and questionnaire Taguchi Methods were integrated in this research for analyzing the domestic tourists’ demands for hotel-room spare in the eco-friendly hotels. The research conclusion is that the tourists’ necessary spare are 6 in total. Three factors, including “tissue paper”, “towels & bath towels” and “toothpaste & toothbrushes” demonstrate the highest significance. The Response Surface Methodology (RSM) was applied on analyzing the positive significant influence ratio of each individual kit for sorting out the best kit assembly and quantity. The research result indicates that supply only set of court kit can already reach the highest customer satisfaction. Hopefully, this research conclusion and result can help achieve the highest customer satisfaction for the supply of hotel room courtesy kit by eco friendly hotels.
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Ho, Kei-Tai, and 何桂泰. "Improving Color Filter Quality by Taguchi Method." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/31365421802313005595.
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碩士中原大學
工業工程研究所
94
ABSTRACT The Red-Blue-Green (RBG) process of color filter influences the color performance of TFT-LCD. The film deposition process of conductive Indium Tin Oxide (ITO), a key process of color filter fabrication, affects the display brightness. This process forms the positive-negative diodes with the pattern electrodes on array substrates to twist the liquid crystal molecules between two electrodes. Because of the low resistance and high transmittance requirements, a stable fabrication process is required. This research used Taguchi method to improve the color filter quality. The experiments were conducted at a color filter factory located in north Taiwan. Several control parameters of ITO’s film deposition process were used in the experiments, and significant factors affecting thin film properties were identified. The experiment data were analyzed based on Orthogonal Array L18 with multiple variable calculations. ANOVA and S/N were also used to find the optimal process parameters of ITO deposition leading to improved film quality properties such as low resistance and high uniformity. The result of this study could be a good reference for setting up the next generation factory.
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Yen, Chia-ho, and 顏嘉禾. "The optimal design for ADOFC function conditions determined by Taguchi’s method." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/35019397227446777626.
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碩士國立中央大學
光機電工程研究所
95
In the optical communication system, coupler is one of indispensable components. The purpose of couplers is about to control power. To meet this demand for optical directional couplers, the adiabatic optical directional full coupler (AODFC) which is one of adiabatic directional coupler (ADC) is a nice choice. This coupler has some advantages over the conventional one such as more bandwidth, polarization insensitivity to fabrication. The optimal design for ADOFC function conditions determined by Taguchi’s method with beam propagation method (BPM) to try and find the best sets of coupling waveguide structure tolerance parameters range of adiabatic optical directional full coupler for reducing the low crosstalk、short coupler length and board bandwidth. In accordance with Taguchi’s method and BPM simulation process, the working time of simulation and optimization experimentally can be greatly reduced. Taguchi’s method his contributions have also made the practitioner work simpler by advocating the use of fewer experimental designs. In this paper, the result of optimization coupling waveguide structure design of AODFC by Chen、Blackman、Hamming and Modification-hamming function are investigated. When the crosstalk has been set -40dB, the Total average of coupler length is below 7000 , bandwidth is over 200nm.
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Huang, Shih-Hao, and 黃士豪. "Alpha risk of Taguchi’s method for the-smaller-the-better type." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/57k7ec.
Full textAbstract:
碩士逢甲大學
工業工程學所
90
One of the basic assumptions of Taguchi’s parameter design is that the error variances are not equal for all treatment conditions. Thus, the optimal level combination of parameters is determined by maximizing signal-to-noise ratio for the-smaller-the-better and the-larger-the-better type quality characteristics. On the contrary, one of the basic assumptions of experimental design is that the error variances are equal for all treatment conditions. Thus, the factor level combinations whose quality characteristic is significant different from the other factors is found by using ANOVA. If the assumption of the later is true, then there is an alpha risk that Taguchi method may fail to select the optimal level combinations. The purpose of this paper is to investigate the alpha risk of Taguchi method for STB type problem using simulation.
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Luong, Nguyen Ngoc, and 阮玉亮. "Design Optimization Study of Orthopedic Screw by Taguchi Method and Neurogenetic Method." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/snaf88.
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碩士國立臺灣科技大學
機械工程系
99
Searching optimum problem is very important in engineering field. There are many methods to solve this problem but no one can assure that the optimum found is the global optimum. We can only have a conclusion that one method can find a better optimum solution than another method. One conventional approach to find optimum is Taguchi method which was applied very widely and successfully in many disciplines. Another approach is Neurogenetic method which includes artificial neural network and genetic algorithm. This method has emerged as a very effective and powerful method to search optimum solution. The purpose of this study is to compare the conventional method with the new method in finding optimum design and calculating contribution of each factor. Thus, these two methods were applied for finding optimal solution of the lag screw which plays a very important role in curing patients. Because the lag screw needs bending strength which resists breakage and pullout strength which resists loosening, the two methods were exploited to find optimal solution for each bending case and pullout case separately. From the results, the optimum found by Neurogentic method is better than the optimum found by Taguchi method, especially in the bending case which is the more complex case compared to pullout case. It means that the more complicated relationship between factors and response the better optimum solution can be found by Neurogenetic method compared to Taguchi method. Besides, using artificial neural network, the contribution of each factor could be calculated by Modified Profile method and the results were similar to the contribution calculated by analysis of variance in Taguchi method. This study is an objective suggestion for engineers in choosing method to find the optimum solution. The Taguchi method should be applied if the case is simple because the Taguchi method is systematic, simple and easy to achieve the result. The Neurogenetic method should be applied if the case is complex because using Neurogenentic method can obtain better optimum solutions. It is a notice that if the artificial neural network is well-trained, the Neurogenetic can be very powerful and can be applied in many situations, like: multi-objective optimization.
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Chi-PO-Chun and 紀博竣. "Optimization of injection molding parameters using Taguchi method and response surface method." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/33412448396593316945.
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碩士建國科技大學
機械工程系暨製造科技研究所
102
This study aimed to explore the warpage effects of different injection factors in the injection molding process. The mold flow analysis software (Moldflow Plastics Insight 5.0) combined with the Taguchi method and response surface analysis to find the optimal injection parameters. The significant parameters for warpage were found by Taguchi method, which was packing time, packing pressure and filling pressures. These factors were applied to obtain minimum warpage through response surface analysis. The results are useful for understanding the correlation between the molding factors and the warping. The mold flow analysis software is valuable for injection molding technology and may contribute to future applications.
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Huang, Hui-Tzu, and 黃慧慈. "Taguchi Method in Feature Selection and Parameter Determination." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/80523504257637396409.
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碩士國立暨南國際大學
資訊管理學系
95
Abstract In traditional medical diagnosis, doctors usually diagnose patients according to their experiences. Following the computerization of medical systems, there are more and more tacit information in it. If we can use the advanced method of data analysis to find the correlation between the disease feature and disease, it will help doctors for enhancing the accuracy of disease diagnosis. Many researchers have been confirmed that machine learning technology can improve disease diagnosis accuracy significantly. SVM (Support Vector Machine) has been generally used in classification and forecasting issues. There are two problems when using SVM, one is choosing the input feature, the other is parameters setting of SVM. How to find optimal feature selection and parameters setting at the same time will be an important topic. An approach we proposed is based on taguchi method for feature selection and parameter design, then applying ant algorithm to find the parameters of SVM. The used databases are medical datasets form University of California at Irvine (UCI) Machine Learning Repository. The experiment results show our proposed approach uses less features and better parameters to improve total accuracy and comparable with BPNN (Back Propagation Neural Network). Keywords：Disease Diagnosis、Feature Selection、Taguchi Method、Support Vector Machine、Ant Algorithm
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Cheng, Tat-sung, and 鄭達聰. "Application of Taguchi method –parameter design for desmear." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/10102023714766825256.
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碩士雲林科技大學
工業工程與管理研究所碩士班
99
With the personal electronic products for product portability, convenience, versatility and low-cost of the appeal, making the current PCB towards the short, fast, multi-functional, high I / O Development; In terms of the printed circuit board, HDI and IC substrate such as high-end PCB process capability presented is consistent with the product features of the basic products The rise of environmental consciousness, as well as the product manufacturing process in response to rising demands of reliability, add the Filer''s board is alsoincreasing. By using Taguchi Method, and with statistical software analysis conducted into the number of sub-categories participating in the design. Nominal the best analysis confirmed that all future manufacturing process factors for the impact of different materials. Proven results show that income is indeed the best combination of factors and conditions of the high level of contribution to the glue residue quality.
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林明正. "Mold flow simulation is analysis by taguchi method." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/66288618601167255014.
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Yang, Chung-Chuan, and 楊崇傳. "Application of taguchi method to control system design." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/75858316726619286431.
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Lin, Chih-shuen, and 林志勳. "LED Lighting Tube Design by using Taguchi Method." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/13013054577962364744.
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碩士國立中央大學
光電科學研究所
97
The main purpose of this paper is to examine the application of Taguchi method and program TracePro optical simulation software, to do for the optoelectronics industry in LED lighting design and analysis, and low-cost, high-quality objectives for the design. Taguchi method will be establish the best combination of parameters, the material of the lighting tube, cross-section shape of the lighting tube, cutting angle on both sides of the lighting tube, cutting height above the lighting tube, the type of the lens on both sides of the lighting tube and the type of notch above the lighting tube, such as six factors can be controlled and used to do five standard design parameters. By using the Taguchi method orthogonal arrays, tableＬ25(56), to set the parameters. We simulated in TracePro, and obtained 25 sets of simulation results, and calculate the results to identify the main effects of the process elements. Then we got the best response between the various factors. Taguchi method can be effectively reduce simulation times to 25, the 6 factors and the 5 levels of each factor to be done the simulation to 15625 times. The designers can get better design parameters in a short time. The original design of lighting tube without optimization by Taguchi method, the situation in TracePro simulated irradiance for 0.41353 W/m2. The design by using Taguchi method had the better irradiance for 0.80217 W/m2 in TracePro into the simulation, the irradiance was improved significantly.
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-Mohammed, Abbas, and 雷方奕. "THE ALPHA RISK OF TAGUCHI METHOD USING SIMULATION." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/17752758577336026652.
Full textAbstract:
博士逢甲大學
工業工程與系統管理學研究所
96
Taguchi method is a widely used approach for parameter design. The overall goal of parameter design is to find settings of the controllable factors so that the response is least sensitive to variations in the noise variables, while still yielding an acceptable mean level of the response. To achieve this goal, Taguchi utilizes an orthogonal array (OA) to obtain dependable information about the design parameter with minimum time and resources. Then, he adopts signal-to-noise (S/N) ratio as a quality measure evaluate performance. In the statistical analysis of S/N ratio, analysis of variance (ANOVA) is performed to determine significant factor effects. In ANOVA, Taguchi suggests pooling-up technique to obtain an estimate of error variance and adopts F value of four to decide significant factor effects. Taguchi method has widespread applications upstream in manufacturing to fine-tune a process in such a manner that the output is insensitive to noise factors. Nevertheless, this method was the subject of discussion and much debate among statisticians in different platforms. This research proposes an extension to ongoing research by investigating the alpha risk of Taguchi method, or the probability of identifying insignificant factors as significant, with mostly used OAs for different type static quality characteristics (QCH) using simulation. In this research, it is assumed that all QCH values are normally distributed with the same mean and standard deviation. Consequently, the null hypothesis that all factors are identified as insignificant is true. However, simulation results reveal that the alpha risk is very high with all OAs, which may provide erroneous conclusions in parameter design.
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Yang, Cheng-Yu, and 楊政諭. "Improvement of the LCD Process using Taguchi Method." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/05422146157517117312.
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碩士逢甲大學
工業工程與系統管理學研究所
94
Liquid Crystal Displays (LCDs) offer tremendous advantages including power savings, light weight, no radiation, and convenient portability. LCDs are gradually replacing conventional display elements and becoming widely used in auto navigation systems, notebook computers, etc. Generally, LCDs industry uses plasma washing process to improve product output rate. Optimizing settings for plasma washing machine is of great interest in this research. For this purpose, Taguchi method is applied to investigate the effects of three two-level control factors utilizing L4 orthogonal array. Since, the quality characteristic (QCH) is order category data, thus accumulation analysis is employed to analyze QCH and improve LCD terminal cleanliness. The results show that optimal machine settings dramatically boost terminal cleanliness. In the solder printing process of surface mount technology, L18 orthogonal array is utilized to investigate one two-level and seven three-level control factors. The optimum factor settings are identified by those maximizing signal-to-noise ratios. Adopting optimal process settings improves the performance index Cpk of solder printing process from 0.64 to 1.97. As a result, this may lead to significant quality improvement for this process. In conclusions, measuring response values in a robust design requires selection of key quality characteristics which should affect dramatically product functionality and lead to quality improvement.
48
Chen, Yu-Ming, and 陳裕明. "A Fuzzy Taguchi Method for Multiple Quality Characteristics." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/45767234562885209651.
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碩士華梵大學
工業管理學系碩士班
92
The purpose of this study is to propose a quick and efficient method to assist for the manufacturing process improvement, especially, for facilitating mass production smoothly during the new product developing stage. The research employs Taguchi Quality Engineering & Fuzzy Sets Theory to analyze each quality characteristic in the SMT processes. The integration of Principal Component Analysis & Grey Relational Analysis is used for analyzing synthetically Multiple Quality Characteristics (MQC) to obtain the optimal process parameter combinations for the control factors. Thus, it aims to create one algorithmic model, which can gain the best parameter combinations efficiently to meet the design specification, for the optimization of the MQC process as well as for the engineer to follow up while handling this kind of issue. In the experimental verification, there are two methodologies applied: one is fuzzy judgment data (Qualitative Measurements); another is practical measurement data (Quantitative Measurements). Finally, this research compares these two methodologies and concludes that the fuzzy judgments can replace the practical measurements. For example, (1) The profile/resolution of solder printing can be used to represent the “soldering thickness” and replace the practical thickness measurement. (2) The visual inspection of the “printing deviation” in terms of semantic values can be used to determine the degree of deviation instead of the practical measurement. The replacements mentioned without the precise inspection facilities but the fuzzy judgments by the engineer or inspector, still won’t impact the selection of the optimal parameter combinations.
49
Fan, Yun-An, and 樊允安. "Optimal Design of Badminton Trainer by Taguchi Method." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/xe99qj.
Full textAbstract:
碩士中原大學
機械工程研究所
106
In this study was design a new type badminton trainer. And we use Taguchi Method to study how to serve the shuttle optimization. The badminton robot on the market was use two motors with two friction rollers. The price is too expensive to the general public. In this study was design a badminton robot with one AC servo motor and two fiction rollers. And use 1:5gearbox to speed up the friction rollers rotate. The new designs cut costs because it reduced one motor. After the Taguchi experiment, we got the best combination of parameters, and conducted the best experiment. In the experimental results, the experiment reached the set goal.
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CHIH-HAO, WANG, and 王智豪. "Optimization of Straight Steelmaking Size Using Taguchi Method." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/p6agy6.
Full textAbstract:
碩士高苑科技大學
電機工程研究所
106
In processes of the casting of steel billet, molten metal is tapped into the ladle from furnaces. After undergoing ladle treatments and arriving at the correct temperature (more than 1600 ℃), the ladle is transported to the top of the casting machine (Usually the ladle sits in a slot on a rotating turret at the casting machine). From the ladle, the hot metal is transferred to a holding bath called a tundish.Metal is drained through the tundish and into all the mold. The mold is water-cooled to solidify the hot metal directly in contact with it; this is the primary cooling process. It also oscillates vertically (or in a near vertical curved path) to prevent the metal sticking to the mold walls. After primary cooling process, Straightener Withdrawal Units In this configuration, the billet is straightened the billet. Following the straightener, the billet is cut into 150mm width and different lengths by mechanical shears or by travelling oxyacetylene torches and the billet is cut into individual pieces of the following as-cast products: slabs, bloom, billets, or beam blanks.The present research proposal, the close tolerance is controlled by the existing infrared scale system technology in the process of continuous casting of steel billets by using hydraulic shearing average length of 12080mm; when not been used under the Taguchi Methods, steel billets cutting length tolerances is in the range of +/- 30mm to 50 mm.In order to correct and adjust the iris of infrared scale system, contrast, brightness of optical aberration to find the best timing to cut during hydraulic shearing, in this research, the Taguchi method was used during the process of steel billet casting to analyze the relative feed flow, molten metal velocity, secondary cooling water, mold oscillation device, speed of Tundishand the relative illumination of infrared scale system as to get the best parameter design of monitoring factor, so that the deviation of steel billet size can drop to 0mm ~ 10mm and to reach the best quality of steel billet cutting and reduce the loss of material so as to make the continuous casting of steel billet has rapid change in size to meet the market demand for different sizes of steel, also to save energy, cost, manpower, and material loss to improve production efficiency.