Relevant bibliographies by topics / Chatter Stability

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Chatter Stability'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Chatter Stability.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Chatter Stability"

1

Graham, E., M. Mehrpouya, and S. S. Park. "Robust prediction of chatter stability in milling based on the analytical chatter stability." Journal of Manufacturing Processes 15, no. 4 (October 2013): 508–17. http://dx.doi.org/10.1016/j.jmapro.2013.08.005.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Shao, Yun Peng, Xi Jing Zhu, Meng Liu, and Zhen Liu. "Stability Analysis of Chatter System on Ultrasonic Honing." Advanced Materials Research 712-715 (June 2013): 1241–47. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1241.

Full text
Abstract:
The chatter caused by the inner factors of the machining system in the ultrasonic honing process would seriously affect the surface quality of combustion engine. A dynamical model of ultrasonic honing chatter system was established, which involved with ultrasonic honing mechanism and dynamic honing depth, the relationship between the limit honing width and honing speed was deduced based on the theory of regenerative chatter; the simulation was carried out to obtain the effect of different parameters including stiffness coefficient, damping ratio, spindle speed and reciprocation motion speed on the stability limit curve of the chatter system. It can be concluded that the ultrasonic honing chatter system have better stability with low spindle speed, high stiffness and damping ratio, which providing foundation to eliminate ultrasonic honing system chatter in the precision machining of cylinder liner.
APA, Harvard, Vancouver, ISO, and other styles
3

Huang, Chao, Wen-An Yang, Xulin Cai, Weichao Liu, and YouPeng You. "An Efficient Third-Order Full-Discretization Method for Prediction of Regenerative Chatter Stability in Milling." Shock and Vibration 2020 (June 20, 2020): 1–16. http://dx.doi.org/10.1155/2020/9071451.

Full text
Abstract:
The prediction of regenerative chatter stability has long been recognized as an important issue of concern in the field of machining community because it limits metal removal rate below the machine’s capacity and hence reduces the productivity of the machine. Various full-discretization methods have been designed for predicting regenerative chatter stability. The main problem of such methods is that they can predict the regenerative chatter stability but do not efficiently determine stability lobe diagrams (SLDs). Using third-order Newton interpolation and third-order Hermite interpolation techniques, this study proposes a straightforward and effective third-order full-discretization method (called NI-HI-3rdFDM) to predict the regenerative chatter stability in milling operations. Experimental results using simulation show that the proposed NI-HI-3rdFDM can not only efficiently predict the regenerative chatter stability but also accurately identify the SLD. The comparison results also indicate that the proposed NI-HI-3rdFDM is very much more accurate than that of other existing methods for predicting the regenerative chatter stability in milling operations. A demonstrative experimental verification is provided to illustrate the usage of the proposed NI-HI-3rdFDM to regenerative chatter stability prediction. The feature of accurate computing makes the proposed NI-HI-3rdFDM more adaptable to a dynamic milling scenario, in which a computationally efficient and accurate chatter stability method is required.
APA, Harvard, Vancouver, ISO, and other styles
4

Yu, Ai Bing, Liang Dong, and Yan Lin Wang. "Effect of Wheel Elasticity on Grinding Stability." Applied Mechanics and Materials 37-38 (November 2010): 394–97. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.394.

Full text
Abstract:
Grinding stability was analyzed concerned with contact deformation and contact stiffness of wheels. Elastic deformations of the grinding wheel were measured with inductance sensors. Dynamic grinding system model was set up. Relation between contact stiffness and chatter growing index was analyzed. Chatter suppression experiments with variable grinding speeds were carried out. When wheel is in contact with a workpiece, contact deformation can occur. The contact stiffness of grinding wheel is a variable. The relation between chatter growing index and contact stiffness is an increasing function. Chatter growing index can be decreased by lowering contact stiffness of wheel. The grinding system stability will be improved with variable grinding speed.
APA, Harvard, Vancouver, ISO, and other styles
5

Cordes, Marcel, Wolfgang Hintze, and Yusuf Altintas. "Chatter stability in robotic milling." Robotics and Computer-Integrated Manufacturing 55 (February 2019): 11–18. http://dx.doi.org/10.1016/j.rcim.2018.07.004.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Altintas, Y., and J. H. Ko. "Chatter Stability of Plunge Milling." CIRP Annals 55, no. 1 (2006): 361–64. http://dx.doi.org/10.1016/s0007-8506(07)60435-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Lu, Lin, Masahiko Sato, and Hisataka Tanaka. "Experimental Verification of Chatter-Free Ball End Milling Strategy." International Journal of Automation Technology 7, no. 1 (January 5, 2013): 45–51. http://dx.doi.org/10.20965/ijat.2013.p0045.

Full text
Abstract:
Chatter vibration frequently occurs in ball end milling. If the characteristics of the cutting tool system and cutting process are known, chatter stability in ball end milling can be evaluated. Hence, in this paper, a chatter-avoidance strategy based on a regenerative chatter theory is proposed to prevent the occurrence of chatter. This consists of a simulation of chatter stability and cutting condition control. When the characteristics of a vibration system change, this chatter-avoidance strategy cannot cope with it. Therefore, another chatter-avoidance control algorism that changes cutting parameters on a machining center is proposed. This can adapt to the change in the characteristics of the vibration systemduring cutting. The effectiveness of the two chatter-avoidance methods proposed is examined through experiments.
APA, Harvard, Vancouver, ISO, and other styles
8

Jiang, Yong Xiang, San Peng Deng, Yu Ming Qi, and Bing Du. "The Machining Parameters Online Monitoring Method for Stability Prediction." Applied Mechanics and Materials 141 (November 2011): 559–63. http://dx.doi.org/10.4028/www.scientific.net/amm.141.559.

Full text
Abstract:
Unstable grinding due to the regenerative chatter is one of the most critical errors and a serious limitation to achieve good surface quality. The machining accuracy of CNC is greatly depending on online detecting, prediction and control ability of abnormal phenomena in machining such as chatter. Based on the mechanism of regenerative chatter, the dynamic models of cylindrical plunging are established by considering both the rotate speed of workpiece and grinding wheel. The traverse grinding can be assumed as the sum of several stepwise plunging grinding with respect to the grinding contact area. The stability caused by online detecting indexes of grinding parameters was analyzed. Grinding experiments of online chatter detecting were carried out and agreed well with the theoretical results that show good application future for online chatter detecting.
APA, Harvard, Vancouver, ISO, and other styles
9

Li, Yu, and Chao Sun. "Chatter Prediction Based on NC Physical Simulation in Machining Ti6Al4V Thin-Walled Components." Applied Mechanics and Materials 395-396 (September 2013): 1008–14. http://dx.doi.org/10.4028/www.scientific.net/amm.395-396.1008.

Full text
Abstract:
Chatter has been a problem in CNC machining process especially during machining thin-walled components with low stiffness. For accurately predicting chatter stability in machining Ti6Al4V thin-walled components, this paper establishes a chatter prediction method considering of cutting parameters and tool path. The fast chatter prediction method for thin-walled components is based on physical simulation software. Cutting parameters and tool path is achieved through the chatter stability lobes test and finite element simulation. Machining process is simulated by the physical simulation software using generated NC code. This proposed method transforms the NC physical simulation toward the practical methodology for the stability prediction over the multi-pocket structure milling.
APA, Harvard, Vancouver, ISO, and other styles
10

He, Feng-Xia, Li Dai, Qisen Chen, Yu Liu, and Zhong Luo. "Three-dimensional stability analysis of robotic machining process." Industrial Robot: the international journal of robotics research and application 47, no. 1 (September 19, 2019): 82–89. http://dx.doi.org/10.1108/ir-02-2019-0036.

Full text
Abstract:
Purpose Since robot’s structural stiffness is usually less than 1 N/µm, mode coupling chatter occurs frequently during robotic milling process, and chatter frequency is close to the natural frequency of the robot itself. Chatter not only affects the surface quality but also damages the robot and reduces the positioning accuracy. Therefore, it is necessary to predict chatter in robotic machining process. Design/methodology/approach A three-dimensional dynamic model for robot’s spatial milling plane is established, and a corresponding stability criterion is obtained. First, the cutting force in milling plane is transformed into the coordinate system of the robot principal stiffness direction based on homogeneous transformation matrix. Then the three-dimensional stability criterion under milling process can be obtained by using system stability analysis. Furthermore, the circle diagram of mode coupling chatter stability is drawn. Each feeding direction’s stability under the two processing forms, referred as spindle vertical milling and spindle horizontal milling, is analyzed. Findings The experimental results verify that the three-dimensional stability criterion can avoid chatter by selecting machining feed direction in stable area. Originality/value This paper established a three-dimensional dynamic model in robot’s spatial milling plane and proposed a three-dimensional stability criterion according to the Routh criterion. The work is also expected to be an efficient tool in the development of robotic milling technology.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Chatter Stability"

1

Park, Jong-Suh. "The Prediction of Chatter Stability in Hard Turning." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5235.

Full text
Abstract:
Despite a large demand from industry, a realistic chatter modeling for hard turning has not been available due to the complexity of the problem, which is mainly caused by flank wear and nonlinearity in hard turning. This thesis attempts to develop chatter models for predicting chatter stability conditions in hard turning with the considerations of the effects of flank wear and nonlinearity. First, a linear model is developed by introducing non-uniform load distribution on a tool tip to account for the flank wear effect. Second, a nonlinear model is developed by further incorporating nonlinearity in the structure and cutting force. Third, stability analysis based on the root locus method and the describing function approach is conducted to determine a critical stability parameter. Fourth, to validate the models, a series of experiment is carried out to determine the stability limits as well as certain characteristic parameters for facing and straight turning. From these, it is shown that the nonlinear model provides more accurate predictions than the linear model, especially in the high-speed range. Furthermore, the stabilizing effect due to flank wear is confirmed through a series of experiments. Fifth, to fully account for the validity of linear and nonlinear models, an empirical model is proposed to fit in with the experimental stability limits in the full range of cutting speed. The proposed linear and nonlinear chatter models will help to improve the productivity in many manufacturing processes. In addition, chatter experimental data will be useful to develop other chatter models in hard turning.
APA, Harvard, Vancouver, ISO, and other styles
2

Eynian, Mahdi. "Chatter stability of turning and milling with process damping." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/19234.

Full text
Abstract:
The prediction of chatter instability in machining steel and thermal-resistant alloys at low ‎cutting speeds has been difficult due to unknown process damping contributed by the ‎contact mechanism between tool flank and wavy surface finish. This thesis presents ‎modeling and measurement of process damping coefficients, and the prediction of chatter ‎stability limits for turning and milling operations at low cutting speeds. ‎ The dynamic cutting forces are separated into regenerative and process damping ‎components. The process damping force is expressed as a product of dynamic cutting ‎force coefficient and the ratio of vibration and cutting velocities. It is demonstrated that ‎the dynamic cutting coefficient itself is strongly affected by flank wear land. In ‎measurement of dynamic cutting forces, the regenerative force is eliminated by keeping ‎the inner and outer waves parallel to each other while the tool is oscillated using a piezo ‎actuator during cutting. ‎ Classical chatter stability laws cannot be used in stability prediction for general turning ‎with tools cutting along non-straight cutting edges; where the direction and magnitude of ‎the dynamic forces become dependent on the depth of cut and feed-rate. A new dynamic ‎cutting force model of regeneration of chip area and process damping, which considers ‎tool nose radius, feed–rate, depth of cut, cutting speed and flank wear is presented. The ‎chatter stability is predicted in the frequency domain using Nyquist stability criterion.‎ The process damping is considered in a new dynamic milling model for tools having ‎rotating but asymmetric dynamics. The flexibility of the workpiece is studied in a fixed ‎coordinate system but the flexibility of the tool is studied in a rotating coordinate system. ‎The periodic directional coefficients are averaged, and the stability of the dynamic ‎milling system is determined in the frequency domain using Nyquist stability criterion. ‎ The experimentally proven, proposed stability models are able to predict the critical ‎depth of cut at both low and high cutting speeds.‎
APA, Harvard, Vancouver, ISO, and other styles
3

Dassanayake, Achala Viomy. "Machining dynamics and stability analysis in longitudinal turning involving workpiece whirling." Thesis, [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1817.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Alan, Salih. "Development Of A Fast Analytical Method For Prediction Of Part Dynamics In Machining Stability Analysis." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12611096/index.pdf.

Full text
Abstract:
The objective of this study is to develop and implement practical and accurate methods for prediction of the workpiece dynamics during a complete machining cycle of the workpiece, so that FRFs of the workpiece can be used in chatter stability analysis. For this purpose, a structural modification method is used since it is an efficient tool for updating FRFs due to structural modifications. The removed mass is considered as a structural modification to the finished workpiece in order to determine the FRFs at different stages of the process. The method is implemented in a computer code and demonstrated on representative parts such as turbine blades. The predictions are compared and verified with the data obtained using FEA. The FRFs are used in chatter stability analyses, and the effect of part dynamics on stability is studied.
APA, Harvard, Vancouver, ISO, and other styles
5

Kilic, Murat Zekai. "Nonlinear Dynamic Modeling And Analysis Of Spindle-tool Assemblies In Machining Centers." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610861/index.pdf.

Full text
Abstract:
Chatter is unwanted since it causes deteriorating effects on the milling process. Stability lobe diagrams are developed in order to determine the stable cutting conditions at which chatter-free machining can be made. The need of cutting away more chips to make milling operations quicker has brought the concept of high-speed milling. This increased the importance of estimating stability lobe diagrams of the milling process more accurately. The state-of-art chatter and spindle-toolholder-tool models predict the stability lobe diagram for milling process quite effectively. However, sometimes chatter might occur even at cutting conditions selected using theoretically obtained stability lobe diagrams. One of the reasons for that may be nonlinearities in the system. This being the motivation, in this work, nonlinearities at the bearings of spindle-toolholder-tool system are investigated. In this thesis, cubic nonlinearity is assumed to represent stiffness of a bearing in a spindle-toolholder-tool system. Effects of nonlinearity on stability lobe diagram of a milling process are studied by using the mathematical model developed for such a system. Frequency response function of spindle-toolholder-tool system without bearings is obtained using Timoshenko beam model. Then, bearings are modeled by using describing function theory and coupled to the dynamics of spindle-toolholder-tool modeled. Solution of the equations of motion of the system in frequency domain is obtained via Newton'
s method with ALC. It is an effective frequency domain method in which turning points on frequency response function are traced. This is important for the system studied, as bearing nonlinearity may introduce turn backs in the response of the system. Case studies are carried out to study the effects of bearing nonlinearity on stability lobe diagram. The effects of the following factors are studied: Magnitude of cutting force, degree of nonlinearity and number of teeth on cutter. Displacement amplitude dependent stiffness of bearings affects the dynamic response due to rigid body modes of the system. It is observed that an increase in cutting force magnitude or in coefficient of bearing nonlinearity results in increase of natural frequencies, thus showing hardening behavior. Shifting of frequencies in the response curve shifts stability lobes related to the affected modes, to the right. For increased number of flutes on cutter, effect of nonlinearity at bearings on stability of the milling process becomes lower. Experimental studies to determine the changes in dynamics of a system during cutting are also carried out in this thesis. Inverse chatter analysis is conducted to obtain modal parameters of a single-degree-of-freedom system using the experiment data. Decrease in natural frequency is observed at high cutting speeds for the particular spindle used. This shift may be due to speed-dependent bearing dynamics and real time adjustment of preload on bearings.
APA, Harvard, Vancouver, ISO, and other styles
6

Atlar, Sibel. "Modelling Part Dynamicsin Machining Processes Considering Material Removal." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12609154/index.pdf.

Full text
Abstract:
Self-excited chatter vibration in machining is one of the most important limitations on utilizing the increasing productivity of modern machine tools. In order to predict stable depth of cuts at high cutting speeds, the stability lobe diagram for a spindle-tool holder-tool combination must be developed. The frequency response function (FRF) of the system must be known for analytical prediction of the stability lobe diagrams. When the flexibility of the workpiece is important, the workpiece itself should be included in the system model by considering the variation of its dynamics at different stages of the machining process. In this thesis, an exact structural modification method is used to find the frequency response functions of the workpiece to be machined at every stage of the machining process. In order to obtain the system matrices and the modal parameters of the original structure, a commercial finite element program MSC. Marc©
is used. The frequency response functions of workpiece are calculated by using the computer program developed in this thesis, and are compared with the ones found by MSC. Marc©
. The stability lobe diagram of the system is obtained by combining the FRFs of the tool with those of the workpiece. The effects of the dynamic of the workpiece on the stability lobe diagrams are studied extensively by using the results of case studies presented in this thesis. In order to increase productivity, minimum chatter-free machining times are also calculated for different cases. For this purpose the effects of the different radial depth of cuts and different cutting strategies on the stability and the machining time are examined with various case studies.
APA, Harvard, Vancouver, ISO, and other styles
7

Fiala, Zdeněk. "Vibrace při obrábění kovů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229045.

Full text
Abstract:
The diploma work deals with a mathematical description of vibration and its generation when machining. Moreover, some techniques of modal parameters measurement in the theoretical part are included. The practical part is designed and based on the measured natural frequencies of the machine with specific tool and materials. In conclusion, a lobe diagram stability for semiautomatic lathe SPN 12 CNC and selected machining operation is specified by means of apparatus.
APA, Harvard, Vancouver, ISO, and other styles
8

Wanner, Bertil. "Strategies for Reducing Vibrations during Milling of Thin-walled Components." Licentiate thesis, KTH, Maskin- och processteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-107156.

Full text
Abstract:
Factors such as environmental requirements and fuel efficiency have pushed aerospace industry to develop reduced-weight engine designs and thereby light-weight and thin-walled components. As component wall thickness gets thinner and the mechanical structures weaker, the structure becomes more sensitive for vibrations during milling operations. Demands on cost efficiency increase and new ways of improving milling operations must follow. Historically, there have been two “schools” explaining vibrations in milling. One states that the entry angle in which the cutting insert hits the work piece is of greater importance than the exit angle. The other states that the way the cutter leaves the work piece is of greater importance than the cutter entry. In an effort to shed some light over this issue, a substantial amount of experiments were conducted. Evaluations were carried out using different tools, different tool-to-workpiece offset positions, and varying workpiece wall overhang. The resultant force, the force components, and system vibrations have been analyzed. The first part of this work shows the differences in force behavior for three tool-to-workpiece geometries while varying the wall overhang of the workpiece. The second part studies the force behavior during the exit phase for five different tool-to-workpiece offset positions while the overhang is held constant. The workpiece alloy throughout this work is Inconel 718. As a result of the project a spread sheet milling stability prediction model is developed and presented. It is based on available research in chatter theory and predicts the stability for a given set of variable input parameters.

QC 20121206

APA, Harvard, Vancouver, ISO, and other styles
9

Malý, Pavel. "Výpočtové modelování samobuzeného kmitání při obrábění." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-320178.

Full text
Abstract:
Diplomová práce se zabývá analýzou produktivity a efektivity řezného procesu frézování. Pro zjištění kritické hloubky třísky byla analyzována reálná frézka. Model frézky byl vytvořen v programu Autodesk Inventor. Analýza řezného procesu probíhala v programu Ansys Workbench. Výsledky byly použity pro sestavení stabilitních diagramů. Po vyhodnocení výsledků byly navrženy dva přístupy pro zefektivnění procesu frézování. Vliv těchto změn na produktivitu řezného procesu byl ověřen porovnáním výsledků s předchozí analýzou.
APA, Harvard, Vancouver, ISO, and other styles
10

Iglesias, Alex. "Milling stability improvement through novel prediction and suppression techniques." Doctoral thesis, Universitat de Girona, 2016. http://hdl.handle.net/10803/392143.

Full text
Abstract:
Chatter is one of the major problems in today’s milling processes. Theoretical models to calculate stability lobes are used to predict and avoid chatter onset. However, current predictions are not accurate enough and significant deviations between predicted and experimentally observed stability limits have been reported.The causes for these deviations are diverse and can be the result of the sum of multiple effects. According to previous works, main errors in stability prediction are related to lack of knowledge about double period instability (flip lobes) and inappropriate determination of dynamic parameters through standard experimental characterization techniques. This Thesis deals with these two problems that affect accurate chatter prediction, contributing with new knowledge and calculation methods for double period type lobes and developing a new methodology for a more accurate dynamic response identification. Nevertheless, an accurate chatter stability prediction does not necessarily imply an optimum use of the machine to maximize productivity, as it is required in current production environments. For this reason, three novel process stabilization techniques are proposed for those cases in which the designed machining process is subject to chatter vibrations.
El chatter és avui en dia un dels principals problemes en els processos de fresat. Per predir i evitar la seva aparició es disposa de models teòrics per al càlcul dels lòbuls d'estabilitat. No obstant això, les prediccions realitzades amb els models d'estabilitat de fresat no són robustes, presentant casos en què les desviacions entre la predicció i la realitat són importants. Les causes d'aquestes desviacions són variades i poden ser degudes a la suma de múltiples efectes. A la vista dels estudis previs realitzats, els principals errors es troben en l'omissió de lòbuls de doble període (lòbuls flip) i errors en la determinació experimental dels paràmetres dinàmics del sistema mitjançant mètodes tradicionals. Aquesta Tesi aborda aquests dos problemes principals en la predicció, aportant nous coneixements sobre el chatter de doble període i desenvolupant una nova metodologia per a un càlcul més precís de la resposta dinàmica del sistema. No obstant això, una predicció precisa de les condicions que donen lloc a un procés de fresat estable no garanteix l'aprofitament òptim de la màquina per maximitzar la productivitat, tal com s'exigeix en l'entorn productiu actual. Per això, es proposen tres noves tècniques per a l'eliminació de chatter en aquells casos en què, el procés de mecanitzat dissenyat estigui sota el perillós influx del chatter.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Chatter Stability"

1

Walker, Christine. Jamaica Ladies. University of North Carolina Press, 2020. http://dx.doi.org/10.5149/northcarolina/9781469658797.001.0001.

Full text
Abstract:
Jamaica Ladies is the first systematic study of the free and freed women of European, Euro-African, and African descent who perpetuated chattel slavery and reaped its profits in the British Empire. Their actions helped transform Jamaica into the wealthiest slaveholding colony in the Anglo-Atlantic world. Starting in the 1670s, a surprisingly large and diverse group of women helped secure English control of Jamaica and, crucially, aided its developing and expanding slave labor regime by acquiring enslaved men, women, and children to protect their own tenuous claims to status and independence. Female colonists employed slaveholding as a means of advancing themselves socially and financially on the island. By owning others, they wielded forms of legal, social, economic, and cultural authority not available to them in Britain. In addition, slaveholding allowed free women of African descent, who were not far removed from slavery themselves, to cultivate, perform, and cement their free status. Alongside their male counterparts, women bought, sold, stole, and punished the people they claimed as property and vociferously defended their rights to do so. As slavery's beneficiaries, these women worked to stabilize and propel this brutal labor regime from its inception.
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Chatter Stability"

1

Stegić, Milenko, Nikola Vranković, Marko Rastija, Željko Goja, and Danijel Barjašić. "Comparative Stability Analysis of Chatter in Grinding Process." In Advances in Mechanism and Machine Science, 4025–32. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20131-9_401.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Zheng, Shasha, and Xilin Fu. "Chatter Dynamics and Stability of the Impulsive van der Pol Equation." In Nonlinear Physical Science, 115–36. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-2853-5_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Zhang, XiaoJian, CaiHua Xiong, and Ye Ding. "Improved Full-Discretization Method for Milling Chatter Stability Prediction with Multiple Delays." In Intelligent Robotics and Applications, 541–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-16587-0_50.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Yu, Tao, Zhi Wei Zhang, and B. C. Wen. "Nonlinear Stability and Bifurcation of Multi-D.O.F. Chatter System in Grinding Process." In Advances in Grinding and Abrasive Technology XIII, 141–45. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-986-5.141.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Olgac, Nejat, and Rifat Sipahi. "New Methodology for Chatter Stability Analysis in Simultaneous Machining." In Control and Mechatronics, 7–1. CRC Press, 2018. http://dx.doi.org/10.1201/9781315218403-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Olgac, Nejat, and Rifat Sipahi. "New Methodology for Chatter Stability Analysis in Simultaneous Machining." In Electrical Engineering Handbook, 1–22. CRC Press, 2011. http://dx.doi.org/10.1201/b10605-9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

"Stability of Systems of DDEs via the Lambert W Function with Application to Machine Tool Chatter." In Time-Delay Systems, 31–42. WORLD SCIENTIFIC, 2010. http://dx.doi.org/10.1142/9789814307406_0003.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Chatter Stability"

1

Olgac, Nejat, and Rifat Sipahi. "Chatter Stability Mapping for Simultaneous Machining." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79116.

Full text
Abstract:
A novel analytical tool is presented to assess the stability of simultaneous machining (SM) dynamics, also known as parallel machining (PM). In SM, multiple cutting tools, which are driven by multiple spindles at different speeds, operate on the same work-piece. Its superior machining efficiency is the main reason for using SM compared with the traditional single tool machining (STM). When SM is optimized in the sense of maximizing the rate of metal removal constrained with the machined surface quality, typical “chatter instability” phenomenon appears. Chatter instability for single tool machining (STM) is broadly studied in the literature. When formulated for SM, however, the problem becomes notoriously more complex. There is practically no literature on the SM chatter, except a few ad-hoc and inconclusive reports. This study presents a unique treatment, which declares the complete stability picture of SM chatter within the mathematical framework of multiple time-delay systems (MTDS). We utilize our recent methodology, called the Cluster Treatment of Characteristic Roots (CTCR), which is developed for this general class of dynamics. As an end result CTCR offers the regions of stability completely in the domain of the spindle speeds. This new methodology opens the research to some interesting directions. They, in essence, aim towards duplicating the “stability lobes” concept of STM for SM, which is clearly a nontrivial task.
APA, Harvard, Vancouver, ISO, and other styles
2

Sbrescia, Francesco, and Neil D. Sims. "A Signal Processing Technique for Chatter Stability Prediction." In ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21133.

Full text
Abstract:
The frequency response function (FRF) of a CNC machine tool plays a key role the onset of regenerative chatter. The majority of modal testing techniques to measure the tool’s FRF rely on skilled operators and expensive equipment, but can still suffer from poor repeatability and excessive machine down-time. Some efforts have been performed to overcome these issues using non-contact devices but in general these methods do not capture the FRF during the metal cutting process. Consequently the effects of the spindle rotation and preload due to the cutting forces cannot be simultaneously considered. The present paper presents a novel method of predicting the tool’s FRF by exciting the system while cutting, and measuring the forces acting on the tool. A signal processing procedure is used study the stability of the system. Numerical simulations are used to illustrate two possible uses of the approach: prediction of the full stability lobes with no prior knowledge of the material cutting parameters; and prediction of the stable depth of cut at the current spindle speed. The results are then discussed with particular emphasis on the issues concerning practical implementation of the approach.
APA, Harvard, Vancouver, ISO, and other styles
3

Olgac, Nejat, and Rifat Sipahi. "Stability in Variable-Pitch Milling Regarding Regenerative Chatter." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13450.

Full text
Abstract:
The regenerative chatter in milling process is studied for two different variable-pitch cutters one with (a) four flutes and the other with (b) six flutes. The cutting dynamics of the process is evaluated from stability perspective. Mathematically, the problem is recognized in a general class of delay differential equations (DDE) with multiple delays, whose stability can be analyzed by a recent stability analysis methodology called the Cluster Treatment of Characteristic Roots, CTCR. This method proves to be very beneficial to surface two critical aspects of the process, which maintain chatter-free cutting: (i) the pitch angle geometry of the cutting tool and (ii) admissible cutting conditions to determine the depth-of-cut and the spindle speeds. Case studies are provided to demonstrate the capabilities.
APA, Harvard, Vancouver, ISO, and other styles
4

Halfmann, Eric B., C. Steve Suh, and N. P. Hung. "Turning Dynamics: Part 2 — Stability at High Speed." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-87939.

Full text
Abstract:
A comprehensive 3D lathe cutting model is validated by comparing numerical simulations to the experimental data obtained in Part 1 using instantaneous frequency. Comparison of chatter-free cutting demonstrates that the model effectively captures the work-piece natural frequency, tool natural frequency, a nonlinear mode, and the spindle speed, which are main components of the underlying dynamics observed experimentally. The model accurately simulates chatter vibrations characterized as increased vibration amplitude and the appearance of coupled tool – work-piece vibrations at a chatter frequency. The stability diagram constructed by running the model at various spindle speeds and depth-of-cuts demonstrates a general increase in the chatter-free critical depth-of-cut as the spindle speed increased. This chatter-free limit begins to exponentially level out as the spindle speed exceeds 1500RPM. At high spindle speeds the work-piece motions dominate the cutting dynamics, resulting in cases of excessive work-piece vibration amplitude and highly nonlinear frequencies which affect the efficiency of the process. The excessive work-piece amplitude cases create a second stability limit to be considered as a result of imbalance and configuration of the work-piece. Thus, work-piece dynamics should not be neglected in mathematical and experimental analyses for the design of machine tools and robust cutting control law.
APA, Harvard, Vancouver, ISO, and other styles
5

Chiou, Richard Y., and Lin Lu. "Analysis of Tension Effect on Chatter Stability in Machining." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39115.

Full text
Abstract:
This paper presents an analysis of the effect of tension on machining stability. It studies the mechanism of a self-excited vibration process by applying a tension force in the axial direction in a turning operation. This research investigates the tension effect on machining stability and develops a comprehensive model for the simulation of stability resulting from the axial tension force in machining, particularly for those applications in cutting long, slender, or thin materials. In addition, a new tension-fixturing technology is introduced to maximize stability and minimize undesirable chatter vibration in machining. The research can lead to a better understanding of stability and control of the cutting processes. It also can improve the traditional clamping method and provide important information in the design of the machine tool system, as well as in the planning, optimization, and production control for cutting processes. Following the theoretical analysis, an experimental study on chatter boundary illustrates the tension effect on machining stability. A comparison between the predicted and experimentally measured stability boundary, over a range of cutting conditions, shows favorable agreement.
APA, Harvard, Vancouver, ISO, and other styles
6

I. Park, Chaneel, Paolo Parenti, Massimiliano Annoni, and Simon S. Park. "Chatter Stability Improvement in Micro Milling with Axial Vibrations." In Proceedings of the 4M/ICOMM2015 Conference. Singapore: Research Publishing Services, 2015. http://dx.doi.org/10.3850/978-981-09-4609-8_027.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Twardowski, Paweł. "HSM Machining Stability During Hardened Steels Milling Process." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59246.

Full text
Abstract:
In this paper HSM analysis of milling hardened steels is presented. All cutting parameters under process stability are described as well. The process stability is showing from point of view of self-excited chatter of machined system, assessed basis on signals of the chatter accelerations and components of resultant force.
APA, Harvard, Vancouver, ISO, and other styles
8

Liu, Meng-Kun, and C. Steve Suh. "Mitigation of Milling Chatter at High-Speed." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-88080.

Full text
Abstract:
A highly interrupted machining process, milling at high speed can be dynamically unstable and chattering with aberrational tool vibrations. While its associated response is still bounded in the time domain, however, milling could become unstably broadband and chaotic in the frequency domain, inadvertently causing poor tolerance, substandard surface finish and tool damage. Instantaneous frequency along with marginal spectrum is employed to investigate the route-to-chaos process of a nonlinear, time-delayed milling model. It is shown that marginal spectra are the tool of choice over Fourier spectra in identifying milling stability boundary. A novel discrete-wavelet-based adaptive controller is explored to stabilize the nonlinear response of the milling tool in the time and frequency domains simultaneously. As a powerful feature, an adaptive controller along with an adaptive filter effective for on-line system identification is implemented in the wavelet domain. By exerting proper mitigation schemes to both the time and frequency responses, the controller is demonstrated to effectively deny milling chatter and restore milling stability as a limit cycle of extremely low tool vibrations.
APA, Harvard, Vancouver, ISO, and other styles
9

Lalley, Aaron, and Mark Bedillion. "Novel Direct Model for Machining Regenerative Chatter." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65265.

Full text
Abstract:
Regenerative machining chatter or resonance in the machining process has traditionally been modeled with the stability lobe approach. This paper presents a new time based direct simulation model and compares it with traditional stability lobe modeling. The direct model has the ability to discriminate directional and time information, resulting in a number of advantages over frequency-based stability lobe analysis.
APA, Harvard, Vancouver, ISO, and other styles
10

Lu, K. B., M. Q. Jing, Y. Q. Zhang, and H. Liu. "Industrial Applications of a System for Chatter Stability Prediction and Monitoring." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63018.

Full text
Abstract:
Chatter vibrations result in poor surface finish, reduced productivity, and shortened tool life in metal cutting. Although chatter stability and monitoring techniques are broadly studied in literature, the deployment of process monitoring system in the shop floor still presents a challenge. In this paper, an online prototype system including two independent modules of chatter stability prediction and monitoring for industrial applications has been constructed cooperatively. Turning and milling processes are considered. Firstly, the stability charts are evaluated by the application of the Laplace transform and the semi-discretization method. The obtained charts can assist the operators in choosing appropriate cutting parameters before operations start. Secondly, the characteristics of chatter are extracted in the time and frequency domains. The norm of chatter arising is formulated in accordance with the variance and spectrum of vibration signals. The corresponding threshold is confirmed relatively in comparison with the characteristics of the stable cutting states recorded in the reference database. Thirdly, the algorithms and modules are implemented with the combination of the advantages of MATLAB and C# programming, in which delay strategy and overlap processing enable to improve the accuracy and rapidity of the monitoring system. Finally, the effectiveness of the proposed system has been verified by experimental results of the industrial trials.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Chatter Stability' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography