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Dissertations / Theses on the topic 'Linear axis'
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1
Chow, Irene A. (Irene Ai Tze). "Design of a two-axis linear motor." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/12349.
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Chaloupka, Roman. "Návrh řízení osy s lineárním motorem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231950.
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This thesis deals with construction, connection and control axis with linear motor. The beginning of thesis is focused on principle of functioning and characteristics of linear motors. The following part describes used components of axis, their mechanical configuration and electrical wiring. Further thesis deals with creating PLC program and user interface for control axis in TwinCAT system. In last part is dealing correct software settings of axis.
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Ghorashi, Ali. "Linear decentralised modelling for H Control of a Multi-Axis simulation table." Thesis, University of Bath, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518127.
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Smith, David G. "Off-axis stiffness and piezoresistive sensing in large-displacement linear-motion microelectromechanical systems /." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3141.pdf.
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Smith, David G. "Off-axis Stiffness and Piezroresistive Sensing in Large-displacement Linear-motion Microelectromechanical Systems." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1900.
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Proper positioning of Microelectromechanical Systems (MEMS) components influences the functionality of the device, especially in devices where the motion is in the range of hundreds of micrometers. There are two main obstacles to positioning: off-axis displacement, and position determination. This work studies four large-displacement devices, their axial and transverse stiffness, and piezoresistive response. Methods for improving the device characteristics are described. The folded-beam suspension, small X-Bob, large X-Bob and double X-Bob were characterized using non-dimensional metrics that measure the displacement with regard to the size of the device, and transverse stiffness with regard to axial stiffness. The stiffness in each direction was determined using microprobes to induce displacement, and microfabricated force gauges to determine the applied force. The large X-Bob was optimized, increasing the transverse stiffness metric by 67%. Four-point resistance testing and microprobes were used to determine the piezoresistive response of the devices. The piezoresistive response of the X-Bob was maximized using an optimization routine. The resulting piezoresistive response was over seven times larger than that of the initial design. Piezoresistive encoders for ratcheting actuation of large-displacement MEMS are introduced. Four encoders were studied and were found to provide information on the performance of the ratcheting actuation system at frequencies up to 920 Hz. The PMT encoder produced unique signals corresponding to distinct ideal and non-ideal operation of the ratchet wheel actuation system. Encoders may be useful for future applications which require position determination.
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Sarkissian, Hakob. "APPLICATIONS OF LINEAR AND NONLINEAR OPTICAL EFFECTS IN LIQUID CRYSTALS." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2603.
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Liquid crystals have been a major subject of research for the past decades. Aside from the variety of structures they can form, they exhibit a vast range of optical phenomena. Many of these phenomena found applications in technology and became an essential part of it. In this dissertation thesis we continue the line to propose a number of new applications of optical effects in liquid crystals and develop their theoretical framework. One such application is the possibility of beam combining using Orientational Stimulated Scattering in a nematic liquid crystal cell. Our numerical study of the OSS process shows that normally this possibility does not exist. However, we found that if a number of special conditions is satisfied efficient beam combining with OSS can be done. These conditions require a combination of special geometric arrangement of incident beams, their profiles, nematic material, and more. When these conditions are fulfilled, power of the beamlets can be coherently combined into a single beam, with high conversion efficiency while the shape and wave-front of the output beam are still of good quality. We also studied the dynamics of the OSS process itself and observed (in a numerical model) a number of notorious instabilities caused by effects of back-conversion iv process. Additionally, there was found a numerical solitary-wave solution associated with this back-conversion process. As a liquid crystal display application, we consider a nematic liquid crystal layer with the anisotropy axis modulated at a fixed rate in the transverse direction with respect to light propagation direction. If the layer locally constitutes a half-wave plate, then the thinscreen approximation predicts 100% -efficient diffraction of normal incident wave. If this diffracted light is blocked by an aperture only transmitting the zero-th order, the cell is in dark state. If now the periodic structure is washed out by applying voltage across the cell and light passes through the cell undiffracted, the light will pass through the aperture as well and the cell will be in its bright state. Such properties of this periodically aligned nematic layer suggest it as a candidate element in projection display cells. We studied the possibility to implement such layer through anchoring at both surfaces of the cell. It was found that each cell has a thickness threshold for which the periodic structure can exist. The anchored periodic structure cannot exist if thickness of the cell exceeds this threshold. For the case when the periodic structure exists, we found the structure distortion in comparison with the preferable ideal sinusoidal profile. To complete description of the electromechanical properties of the periodic cell, we studied its behavior at Freedericksz transition. Optical performance was successfully described with the coupled-mode theory. While influence of director distortion is shown to be negligibly small, the walk-off effects appear to be larger. In summary, there are good prospects for use of this periodically v aligned cell as a pixel in projection displays but experimental study and optimization need to be performed. In the next part we discuss another modulated liquid crystal structure in which the director periodically swings in the direction of light propagation. The main characteristic of such structure is the presence of bandgap. Cholesteric liquid crystals are known to possess bandgap for one of two circular polarizations of light. However, unlike the cholesterics the bandgap of the proposed structure is independent of polarization of normally incident light. This means that no preparation of light is needed in order for the structure to work in, for example, liquid crystal displays. The polarization universality comes at the cost of bandgap size, whose maximum possible value ∆ωPTN compared to that of cholesterics ∆ωCh is approximately twice smaller: ∆ωPTN ≈ 0.58∆ωCh if modulation profile is sinusoidal, and ∆ωPTN ≈ 0.64∆ωCh if it is rectangular. This structure has not yet been experimentally demonstrated, and we discuss possible ways to make it.Ph.D.
Other
Optics and Photonics
Optics
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Mackay, Allen B. "Large-Displacement Linear-Motion Compliant Mechanisms." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/901.
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Linear-motion compliant mechanisms have generally been developed for small displacement applications. The objective of the thesis is to provide a basis for improved large-displacement linear-motion compliant mechanisms (LLCMs). One of the challenges in developing large-displacement compliant mechanisms is the apparent performance tradeoff between displacement and off-axis stiffness. In order to facilitate the evaluation, comparison, and optimization of the performance of LLCMs, this work formulates and presents a set of metrics that evaluates displacement and off-axis stiffness. The metrics are non-dimensionalized and consist of the relevant characteristics that describe mechanism displacement, off-axis stiffness, actuation force, and size. Displacement is normalized by the footprint of the device. Transverse stiffness is normalized by a new performance characteristic called virtual axial stiffness. Torsional stiffness is normalized by a performance characteristic called the characteristic torque. Because large-displacement compliant mechanisms are often characterized by non-constant axial and off-axis stiffnesses, these normalized stiffness metrics are formulated to account for the variation of both axial and off-axis stiffness over the range of displacement. In pursuit of mechanisms with higher performance, this work also investigates the development of a new compliant mechanism element. It presents a pseudo-rigid-body model (PRBM) for rolling-contact compliant beams (RCC beams), a compliant element used in the RCC suspension. The loading conditions and boundary conditions for RCC beams can be simplified to an equivalent cantilever beam that has the same force-deflection characteristics as the RCC beam. Building on the PRBM for cantilever beams, this paper defines a model for the force-deflection relationship for RCC beams. Included in the definition of the RCC PRBM are the pseudo-rigid-body model parameters that determine the shape of the beam, the length of the corresponding pseudo-rigid-body links and the stiffness of the equivalent torsional spring. The behavior of the RCC beam is parameterized in terms of a single parameter defined as clearance, or the distance between the contact surfaces. The RCC beams exhibit a unique force-displacement curve where the force is inversely proportional to the clearance squared. The RCC suspension is modeled using the newly defined PRBM. The suspension exhibits unique performance, generating no resistance to axial motion while providing significant off-axis stiffness. The mechanism has a large range of travel and operates with frictionless motion due to the rolling-contact beams. In addition to functioning as a stand-alone linear-motion mechanism, the RCC suspension can be configured with other linear mechanisms in superposition to improve the off-axis stiffness of other mechanisms without affecting their axial resistance.
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Lai, Haoyu. "On the design of nonlinear gain scheduled control systems." Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1176486900.
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Chlapečka, Tomáš. "Modulární systém lineární osy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231719.
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This thesis contains a structural design of linear axis with a stroke up to 800mm and a maximum load of 800N. The thesis also deals with a modular assembly system of the linear axis based on the structural design. Linear axes can be fitted with rolled, whirled and grinded ball screws with thread pitch 5, 10, 16mm and rolled trapezoidal screws on pitch 4 and 8mm. The stroke of the linear axes can be selected in the range from 200 up to 800 mm, with a maximum load of 800N in all linear dimensions. The feed of linear axis is provided by shaped rolling guide way and four trucks. The modular system offers two servo motors with direct and indirect measuring four stepper engines with indirect measuring. The thesis also includes strength and functional calculations of principal components, graphs of the possible load on linear axis in different positions , durability of the ball screws, maximum speed and feed rate of the chosen screws, data sheet, 3D model, drawings and assembly drawings of the nodes.
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Sládek, Vojtěch. "Energetický model lineární osy s kuličkovým šroubem a servopohonem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401055.
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The aim of the thesis was to study the Energy Models of Linear Axes with Ball Screws and Servo Drives, to analyze the individual parts of the axis with respect to losses, the methodology of calculating the losses on the electrical part and the mechanical part of the drive and creating a complex algorithm that calculates the energy consumed for the specified motion. The thesis is divided into a theoretical and practical part, where the theoretical part is divided into the treatise on the electrical part of the axis and its losses and the part that deals with the mechanical part and its losses. The calculation is divided into the basic verification algorithm and the calculation on the given example. Each calculation is calculated for both linear acceleration and S-curve acceleration. For both types of acceleration, the result of energy and its course over time is also the waveforms of position, velocity, acceleration, angular acceleration, moments, powers, power, speed and currents over time.
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Dvořák, David. "Náhon posuvové souřadnice portálového obráběcího centra pomocí kuličkového šroubu a matice." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400989.
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Master´s thesis is focused on portal milling machine driven by ball screw and nut. There is a limit where it is suitable to use a driven screw or driven nut. Both variants are solved based on specified X-axis travel distance. In last part is solved the design of support long shaft ball screw driven by nut. The work also includes 3D CAD model of both variants and drawing documentation.
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Malásek, Petr. "Náhon posuvové souřadnice portálového obráběcího centra pomocí pastrorku a hřebene." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319281.
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This thesis is dealing with determining of technical and economical limits of axis X of portal milling machine driven by gear rack and pinion. And designing drive of axis like this. In chapter overview of the current state of knowledge are researched options of drive systems of linear axis, primarily of using ball screw and couple of pinion and gear rack. Basic parameters of axis X portal milling machines, options of measuring, guiding of axis and electric motors. Then the limit suitability of using pinion and gear rack is determined. In next chapters is designed few variations of arrangements of drives and selected the best one. This arrangement is then designed.
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Menšík, Martin. "Konstrukce navíječky kompozitního izolátoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382124.
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The aim of this master thesis is the construction of a single-purpose machine used for reeling of composite insulator. In the first part is described the technology of reeling completed by the analysis of used components. Based on the findings, the final constructional version with necessary calculations is stated. The result of this thesis is a 3D model of the chosen design together with drawings and calculations of given parts.
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Soják, Vojtěch. "Konstrukce dvouosého manipulátoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231978.
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This master thesis deals with the design of a two-axis manipulator according to entered parameters. In the first chapter provides description of kinematics structures of industrial robots and manipulators and their workspaces. Next parts focus on search in the used components, producers of manipulators and of current design manipulators at JCEE s.r.o. Lanškroun. The practical part deals with the design and construction of custom manipulator and its price calculation.
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Liebman, Michael Kevin 1974. "Rotary-linear axes for high speed machining." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8218.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.Includes bibliographical references (p. 353-358).
This thesis presents the design, analysis, fabrication, and control of a rotary-linear axis; this axis is a key subsystem for high speed, 5-axis machine tools intended for fabricating centimeter-scale parts. The rotary-linear axis is a cylinder driven independently in rotation and translation. This hybridization minimizes machine inertias and thereby maximizes accelerations allowing for the production of parts with complex surfaces rapidly and accurately. Such parts might include dental restorations, molds, dies, and turbine blades. The hybrid rotary and linear motion provides special challenges for precision actuation and sensing. Our prototype rotary-linear axis consists of a central shaft, 3/4 inch (1.91 cm) in diameter and 15 inches (38.10 cm) long, supported by two cylindrical air bearings. The axis has one inch (2.54 cm) of linear travel and unlimited rotary travel. Two frameless permanent magnet motors respectively provide up to 41 N continuous force and 0.45 N-m continuous torque. The rotary motor is composed of commercially available parts; the tubular linear motor is completely custom-built. The prototype axis achieves a linear acceleration of 3 g's and a rotary acceleration of 1,300 rad/s2. With higher power current amplifiers and reduced sensor inertia, we predict the axis could attain peak accelerations of 12 g's and 17,500 rad/s2 at low duty cycles. This thesis also examines several concepts for developing a precision rotary-linear sensor that can tolerate axial translation.
Our prototype rotary sensor uses two laser interferometers to measure the orientation of a slightly tilted mirror attached to the shaft. A third interferometer measures shaft translation. The rotary axis has a control bandwidth of 40 Hz; the linear axis has a bandwidth of 70 Hz. The rotary-linear axis has 2.5 nm rms linear positioning noise and 3.1 prad rms rotary positioning noise. This thesis presents one novel 5-axis machine topology which uses two rotary-linear axes. The first axis rotates and translates the part. The second axis carries the cutting tool and provides high speed spindle rotation as well as infeed along the axis of rotation. For use as a spindle, precision rotary sensing is not required, and a sensorless control scheme based on motor currents and voltages can be used.
by Michael Kevin Leibman.
Ph.D.
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Musil, Marek. "Návrh robotického pracoviště pro obsluhu vstřikovacích lisů s následnou montáží a kontrolou." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382468.
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The thesis deals with the design of a robotic workplace for the operation of injection moulding machines. It is concerned with the design of the workplace component deployment and the evaluation of the best variant using a multi-criteria assessment. In detail, attention is paid to the end effectors of industrial robots and the assembly workplace, where finishing operations take place. Finally, the risk analysis and technical and economic evaluation of the proposed workplace are carried out.
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Dostál, Martin. "Konstrukční návrh lineární osy pro multifunkční obráběcí centrum." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443239.
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This diploma thesis is concerned with providing a construction proposal of a linear axis X for multifunctional machining center. Moreover, this work presents characterisations of machining centers, overview of manufacturers, list of main construction components used in the linear axis, their evaluation, assessment of various options for construction, which are then explained further. These detailed construction methods include calculations with the subsequent choice of feed system component. Ultimately, final evaluation of chosen option is provided as well. Another section of this thesis is also an economical assessment and 3D model alongside with mechanical drawing.
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Bartoš, Michal. "Náhon posuvové souřadnice portálového obráběcího centra pomocí pastorku a hřebene." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400990.
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This diploma thesis deals with the design the drive of the feed coordinate portal machining center using a gear rack and pinion. The thesis contains researches from the area of CNC machining centers for non-rotating parts and sliding linear systems. Market analysis of portal machining centers of type of lower gantry with a gear rack and pinion was done. Furthermore, several design variants are proposed in terms of positioning the drive on the machine. These variants were further compared and the best option was selected for the specified machine. Subsequently, the technical calculation of the drive is performed and individual parameters and structural elements are proposed. The thesis also includes a 3D model of the proposed variant and the required drawing documentation.
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Moscrop, Jeffrey William. "Modelling, analysis and control of linear feed axes in precision machine tools." Access electronically, 2008. http://ro.uow.edu.au/theses/27.
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Grey, William George. "The Cks1/Cks2 axis in Mll1-dependent Wnt signalling and mixed lineage leukaemia." Thesis, King's College London (University of London), 2015. https://kclpure.kcl.ac.uk/portal/en/theses/the-cks1cks2-axis-in-mll1dependent-wnt-signalling-and-mixed-lineage-leukaemia(d794f091-0917-46a0-8b50-99e8bb52df2c).html.
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Whilst not directly influencing the kinase activity of CDKs, Cks1 and Cks2 proteins are known to be important for substrate specificity – which is essential for timely cell cycle progression. Further to this, Cks1 and Cks2 have been shown to possess CDK independent functions, in concert with the SCFSkp2 or APCCdc20 E3 ligases, fine tuning the activity of CDKs and cell cycle progression. A Cks1/Cks2 axis has been proposed to be important for balancing the phosphorylation and degradation of an array of proteins during the cell cycle, controlling a variety of signalling pathways important in stem cell homeostasis and development. This study identifies a new target of the Cks1/Cks2 axis, the Mixed lineage leukaemia 1 (Mll1) protein. Both the MllN and MllC subunits of Mll1 interact with Cks1 and Cks2, and the cell cycle periodicity of Mll1 is severely altered in Cks-deficient MEFs. The gene transcription function of Mll1 is significantly altered in Cks-deficient MEFs, revealing an enrichment of altered Wnt signalling genes. The Wnt signalling pathway appeared to be severely downregulated in Cks1-/- MEFs and greatly upregulated in Cks2-/- MEFs. Altered Wnt signalling activity is partially dependent on Mll1 protein levels in Cks-deficient MEFs, as exogenous addition or removal of Mll1 can partially restore the WT phenotype. Chromosome translocations disrupting the MLL1 gene, producing MLL-Fusion Proteins (MLL-FPs), result in poor prognostic mixed lineage leukaemias. There is currently great interest in targeting the cell cycle and Wnt signalling for leukaemia treatment, independent of MLL-FPs, to combat the most difficult to eradicate highly quiescent leukaemic stem cells. Here, we found CKS1 and CKS2 interact with some, but not all, MLL-FPs, and both genes modulate Wnt signalling in MLL-AF9 and MLL-ENL carrying cell lines. Targeting the protein degradation function of CKS1 with a small molecule inhibitor of SKP2-CKS1 (C1), and more broadly a pan-Cullin degradation inhibitor (MLN4924), showed reduction of viability in both MLL-AF9 and MLL-ENL cell lines. Investigations with patient blasts carrying MLL-translocations reveal severe reduction in expression of CKS1 and CKS2 compared to healthy controls. Together, this study highlights the importance of unearthing new players in the Cks1/Cks2 axis, with implications in development and disease. The potential exploitation of CKS1 and CKS2 as therapeutic targets in haematological malignancies shows great promise for individual and combinatorial therapies in the future.
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Sedlář, Jiří. "Konstrukce dvouosého suportu vícevřetenového soustružnického automatu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443158.
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This diploma thesis deals with the design of a two-axis multi-spindle lathe carriage. In the first part, there is made a research, and its aim is to find possible variants of design solutions. After the best rated variant was selected, the thesis further continues with the necessary technical calculations of the main design nodes such as a synchronous servomotor, ball screw, linear guide and bearing. The design itself was carried out with regard to calculations and the resulting model was examined in terms of dynamic stability. The subject of examination was to find the natural frequencies of the assembly and to determine the amplitudes of the oscillations which arise from the harmonic excitation force. Finally, Lobe diagrams for grooving and longitudinal turning operations were drawn.
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Yazicioglu, Faruk. "Design And Implementation Of A Two-axes Linear Positioning System For Rapid Prototyping Applications." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608835/index.pdf.
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In this study, a two axes linear positioning system for testing and applying different rapid prototyping techniques was designed and manufactured. A cable/ pulley mechanism is utilized in the system for transmitting motion from motors into linear motion. Use of a cable/ pulley mechanism overcomes the problems resulting from the utilization of conventional drive systems like ball screws and decreases the
overall cost of the system.
The carriage elements of both axes were designed and manufactured by using investment casting. The molds used in casting were also designed and manufactured within this study. The designed system is controlled by a servo motion control system composed of a motion controller, DC servo motors and linear encoders. All elements of the motion control system were selected, integrated and programmed
within the scope of the study.
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Eckered, Göransson Sara. "Kan probiotika lindra depression?" Thesis, Linnéuniversitetet, Institutionen för kemi och biomedicin (KOB), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-84831.
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Tidigare forskning har visat ett samband mellan vår tarmflora och vår fysiska hälsa, och idag görs även mycket forskning på om den även kan påverka vår mentala hälsa. Idag lider över fyra procent av världens befolkning av depression, och den här litteraturstudien har, genom att analysera sju studier och deras resultat, försökt få svar på frågan om probiotika kan lindra depression. Antingen som primär behandling eller som komplement till annan behandling. Den här litteraturstudien gav inga konkreta svar på den frågan, annat än att alla inblandade forskare är överens om att det behövs göra fler, längre och större studier innan man kan dra några slutsatser.Previous research has shown a connection between our microbiota and physical health, and today a lot of research is also being done on whether it also can affect our mental health. Today, over four percent of the world's population suffers from depression, and this literature study has, by analysing seven studies and their results, attempted to answer the question of whether probiotics can alleviate depression. Either as primary treatment or as a supplement to other treatment. This literature study did not provide any definite answers to that question, other than that all the researchers involved in the studies analysed agree that more, longer and larger studies are needed before one can draw any conclusions.
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Tatíček, Vojtěch. "Konstrukce transportního vozíku s robotem nebo nosičem palet." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400969.
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The aim of this work was to design the construction of transport equipment under industrial robot, pallet holder or other equipment. This manipulation device can be moved in one axis on a rigid guide. The device is designed for use in a linear manufacturing system for handling workpieces and tools. It is capable of operating two rows of machines when it is placed in the middle. The main function of this device is to extend the workspace to the carried devices. This type of construction can be used in combination with an industrial robot for other technological tasks such as welding or light machining. The main parts of this device include statically mounted beds that can be stacked behind each other to form optionally long conveyor paths and a positioning plate that moves along the path formed by these beds. An industrial robot, pallet holder or other device is attached to this positioning plate. In addition to the design itself, the thesis also includes a thorough research of the issue, further possibilities of solution in the form of concepts, verification of the structure by means of calculations and simulations and implementation of the solution into a specific production cell.
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Divín, Jan. "Měření směrových charakteristik antén." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218898.
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This Master’s Thesis is dealing with measuring antennas in far field. Especially with automation this measure, direction sensors made by optical mouse, Integrated Hall ICs for Linear and Off-Axis Rotary Motion Detection and remote unit this workplace, which can made communication with PC by USB. It describes the making control program for the PC.
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Goulding, Morgan Ben. "Comparative and experimental analysis of precocious cell-lineage diversification in the embryonic dorsoventral axis of the gastropod Ilyanassa /." Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3008339.
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Axmann, Patrik. "NC otočný stůl s lineární osou." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417425.
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This diploma thesis deals with the construction of an NC rotary table with a linear axis. The first part is devoted to the analysis of the current state of science and technology in the problem, the use of various drives, mechanisms for torque transmission, linear feed lines, measuring and an overview of tables from various manufacturers. Furthermore, the work is devoted to the creation of 4 variants of construction, then the selection of the best variant and technical calculations. At the end, the work deals with a detailed description of the machine.
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Celik, Kazim Arda. "Development Of A Methodology For Prediction Of Surface Roughness Of Curved Cavities Manufactured By 5-axes Cnc Milling." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608368/index.pdf.
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The surface quality is identified by surface roughness parameters. The average surface roughness (Ra) is used in this study, as it is the most commonly used roughness parameter in the industry. A particular curved cavity of a forging die is selected for the experimental study. Different milling methods are tested. The comparison studies are conducted between 3-axes and 5-axes milling, linear and circular tool path strategies and down and up milling. According to the experimental study, appropriate method is determined for the milling of a particular curved cavity of a forging die.
The experimental analysis based on design of experiments (DOE) has been employed by considering cutting speed, feed per tooth and stepover parameters. Multiple linear regression technique is used by which a mathematical formula has been developed to predict the Ra values for milling parameters. The results of the mathematical formula are controlled by conducting test experiments and good correlations are observed between the results of the formula and the results of test experiments.
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Herzig, Nicolas. "De la conception à la commande d'une nouvelle interface haptique 4 axes hybride pneumatique électrique pour la simulation d'accouchement : Le BirthSIM." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI064/document.
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Les simulateurs d'accouchement sont des outils dédiés à la formation du personnel médical en gynécologie obstétrique. Le BirthSIM développé au laboratoire Ampère constitue une interface haptique de simulateur d'accouchement permettant de reproduire divers scénarios d'accouchement et de former les jeunes sages-femmes et obstétriciens aux différents gestes techniques nécessaires dans le cadre de leurs professions. Dans ce manuscrit, les récentes améliorations apportées au prototype du BirthSIM seront présentées. Parmi ces améliorations, deux sont particulièrement remarquables. La première concerne l'augmentation du nombre de degrés de liberté pilotés de l'interface. Ainsi, les travaux ayant permis le passage d'une interface ne comptant qu'un seul degré de liberté à quatre seront détaillés. Le BirthSIM est le seul simulateur d'accouchement qui intègre à la fois des actionneurs électriques et pneumatiques. La seconde évolution concerne le développement de lois de commande permettant d'améliorer le rendu haptique de l'interface. Les lois de commande retenues permettent d'asservir en position le BirthSIM, mais également de régler la raideur de l'interface. Ce réglage de raideur en coordonnées cartésiennes a pour objectif de reproduire le comportement de la tête fœtale en contact avec les tissus mous du bassin au cours d'une contraction. La loi de commande présentée dans ces travaux de thèse est une loi de commande non-linéaire synthétisée par backstepping. En effet, cette méthode permet de prendre en compte les phénomènes non-linéaires agissant sur le comportement des actionneurs pneumatiques. Cette commande, assurant le suivi d'une consigne de position et une modification de la raideur en temps réel à partir d'une stratégie de réglage de gain, a été testée à la fois en simulation et sur le prototype du BirthSIM. Les performances de cette commande sont également comparées à celles de lois de commande plus classiquement utilisées en robotiqueThe childbirth simulators are developed for practitioner training in gynecology and obstetrics. The BirthSIM is a haptic interface which simulates various childbirth scenarios to teach obstetricians and midwives the technical delivery gestures. In this work, the latest improvements on the BirthSIM prototype will be presented. Two improvements are especially detailed. The first one consists in adding actuated degrees of freedom to the haptic interface. Thus, the works which have led to a new four degrees of freedom robot are presented. The BirthSIM is the only childbirth simulator which is actuated by electrical and pneumatic actuators. The aim of the second improvement is to synthesize control laws which improve the haptic rendering. The studied control laws allow the haptic interface to be controlled in position and its stiffness to be tuned in real time. This cartesian stiffness tuning is suitable to reproduce the behavior of the fetal head surrounded by the maternal pelvic muscles. The control law presented in this document have been obtained by the non-linear backstepping synthesis. Indeed, the non-linear phenomenons occurring in pneumatic cylinders can be taken into account by this method. The controller obtained in this work allows the BirthSIM end-effector to track a reference position but also allows the robot stiffness to be tuned in real time. The stiffness control is based on a gain tuning strategy. Finally, the performances have been evaluated in simulation and experimental tests. Those performances have also been compared to the other conventional compliant controllers of the robotic field
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Göbel, Lukáš. "Konstrukční návrh lineární osy pro těžký obráběcí stroj." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318778.
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The content of this thesis is the description the various component of the linear feed axis, which are used in heavy duty machine tools. This describes their features, advantages and disadvantages and on these basics, are selected different appropriate design variants. In the second part of this thesis has been drawn up constructional design of these variants. They were subsequently compared and then was chosen the most ideal one for the designed machine, which is heavy machine tool upper gantry type. The work also includes the 3D CAD model of the final version and drawing documentation.
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Li, Kai-Sheng, and 李凱盛. "Development of Simulation and Collision for Five-Axis Machine Tool with Nonorthogonal Linear Axis Configuration." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/mn4455.
Full textAbstract:
碩士國立虎尾科技大學
創意工程與精密科技研究所
99
As an important process of precision manufacturing, five-axis machining has been widely used in livelihood industries. The basic five-axis machine tool is of mutually orthogonal axis of coordinates in structure. This study discussed the special five-axis machine tool with nonorthogonal linear axis configuration and developed the numerical control programming method. Despite many studies on the five-axis machine tool configuration, discussions about the type of nonorthogonal linear axis are rare. Based on the homogenous coordinate transformation, this study has derived the analytical equations of the five-axis NC code using forward and inverse kinematics. Secondly, this study also developed the virtual simulation modules of the machine tool, and conducted the machine tool collision tests using the STL format to make the simulation results closer to the actual results. The modules can read simple geometric patterns established by STL, by which the tool path simulation and verification can be even faster. This study used Borland C++ Builder 6.0 as the Windows development tool, and used OpenGL 3D graphic library to realize interaction and 3D model presentation. With free-form surface machining as an example, this study converted the NC program for the special configuration. Verification by solid cutting simulation software and real trial cut experiment confirmed that the proposed method could be applied in the simulation and testing of the numerical control program for the special five-axis machine tool with nonorthogonal linear axis configuration.
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Huang, Jyun-Cheng, and 黃鈞成. "RESEARCH ON SYNCHRONIZED CONTROL OF DUAL-AXIS LINEAR ACTUATOR." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/9sjtm4.
Full textAbstract:
碩士國立雲林科技大學
電機工程系
103
The technology and application of the motor has good evolution in the common situation or industry environment, but single-axis servo motor is inadequate to process some problem, and many load platforms solve question by using synchronized control. But for some reason, one of the dual-axis servo motors will be effect by external disturbance and cause synchronous control occur synchronized error. How to control dual-axis servo motors achieve a synchronous motion effectively will be discussion in this thesis. Single-axis servo actuator should modeling the system identification and setting up the loop controller and then using the results to simulate synchronized motion. Since the inherent behavior of each single-axis servo actuator, it is difficult to model the complicated non-linear behavior of the synchronized error between dual-axis servo systems. This thesis proposes a back propagation neural network(BPN) compensation controller and on-line learning rule to reduce the synchronized error. The back propagation neural networks regularizes input signals which from synchronous position and velocity error between two dual-axis servo systems and calculates the parted signals to generate output signal via the neural networks and take output signal as compensated force to fed to controller of each servo systems. The on-line learning rule minimizes the defined error by using gradient descent algorithm to adjust weighting of neural network. All the above experiments will be achieved by 16-bit chip dsPIC30F4011 of Microchip.
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Kang, Wei-Yuan, and 康威遠. "Research on Control Strategy For Multi-Axis Linear Motor System." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/98836398536092704525.
Full textAbstract:
碩士元智大學
機械工程學系
94
In this thesis, we focus on the linear motors applied to the machine tool. We tested all kinds of framework applied to the machine tool, and also tried to build system model. Finally we analysis every framework and compare the advantage and disadvantage. In the beginning, we derive the dynamic equations of the single axis single linear motor system by using discrete Fourier transform (DFT) to transform an ordered sequence of data samples in the step experiment from the time domain into the frequency domain. When moving single-axis-two-linear-motors system we found that the current is inverting. The imperfection will reduce the thrust and bandwidth, and also affect tracking error. For the question, we used two control methods trying to solve it. One is tandem control method, the other is current/torque equalizing technique (current equalizer). In experiment, the imperfection made reduce by two control methods. And the current equalizer on tracking error and bandwidth is better than tandem control method.
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Lin, Tsong-der, and 林聰徳. "Linear and Circular Interpolation of Five-axis NC Tool Paths." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/44316590756899873504.
Full textAbstract:
博士國立臺灣科技大學
機械工程系
101
A 5-axis NC machine tool has two additional rotational axes as compared to a 3-axis NC machine tool. Therefore, it creates two additional rotational movements in addition to the linear movement generated during machining, which significantly increases the complexity of the machine. A 5-axis machine tool is not only suitable for using in machining parts that are highly complex and highly precise, it is also recognized by the industry as a good tool for enhancing the added-value of a product. This is why 5-axis machines are the model of choice that vendors are eager to invest in for research and development when facing the moment of industrial restructuring. However, because of its complexity, the cutting process may produce some unexpected path deviations as a result. Since the capability of post processing for 5-axis tool paths are closely affected by the quality of the controller, this study is devoted to in-depth exploration of CAM interpolation of 5-axis tool paths and to finding ways to upgrade the capability of CAM interpolators. This research first explores the factors contributing to tool path deviation when performing 5-axis machining, and then proposes a solution-switch principle and a constant-chord linear interpolation method to solve the path deviation problem. With the linear interpolation experience, this research proceeds to the study of circular interpolation method to improve the accuracy of 5-axis circular machining. Finally, two case studies are used to compare the total interpolation points generated by CAM software and by the constant-chord method proposed in this thesis. The system implementation shows: using the proposed 5-axis linear and circular interpolation methods can indeed correct 5-axis tool path deviations, and enhance the post-processing capability of 5-axis machining.
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Jayaramaiah, P. "Bangalore-Mysore urban axis: A study in linear pattern of urbanisation." Thesis, 1985. http://hdl.handle.net/2009/2331.
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Zhao, Ran. "Modeling and Contour Control of Multi-Axis Linear Driven Machine Tools." Doctoral diss., 2014. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6214.
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In modern manufacturing industries, many applications require precision motion control of multi-agent systems, like multi-joint robot arms and multi-axis machine tools. Cutter (end effector) should stay as close as possible to the reference trajectory to ensure the quality of the final products. In conventional computer numerical control (CNC), the control unit of each axis is independently designed to achieve the best individual tracking performance. However, this becomes less effective when dealing with multi-axis contour following tasks because of the lack of coordination among axes. This dissertation studies the control of multi-axis machine tools with focus on reducing the contour error. The proposed research explicitly addresses the minimization of contour error and treats the multi-axis machine tool as a multi-input-multi-output (MIMO) system instead of several decoupled single-input-single-output (SISO) systems. New control schemes are developed to achieve superior contour following performance even in the presence of disturbances. This study also extends the applications of the proposed control system from plane contours to regular contours in R3. The effectiveness of the developed control systems is experimentally verified on a micro milling machine.Ph.D.
Doctorate
Mechanical and Aerospace Engineering
Engineering and Computer Science
Mechanical Engineering
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Huang, Chang-Cheng, and 黃章政. "Fuzzy linear quadratic regulator for multi-axis contour tracking motion control." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/78777358203211850823.
Full textAbstract:
碩士國立臺灣海洋大學
機械與輪機工程學系
92
A fuzzy linear quadratic optimal control approach is formulated for biaxial contour tracking problem. In order to decrease contour error, the thesis employs a performance index with variable weights on quadratic contouring error, tracking error, and control input in overall path. The effect which uses fuzzy logic controller increases adaptive capacity for all paths. The estimation formula of contour error shows reducing the tracking error can improve the contour error further. Therefore, to design simply the uncouple controller which combines PID controller with Feedforward controller. The thesis investigates a heart trajectory which consists of two straight lines and four curves. Experimental results demonstrate that one can get the good tracking performance when angles of this path change with time.
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Zeng, Bing-Wei, and 曾秉為. "Motion Control of Two-axis Linear Motor Drives Based on PLC." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/05052501210332741789.
Full textAbstract:
碩士大葉大學
機械與自動化工程學系
103
This thesis develops a free-form contour engraving system of two-axis linear motor drivers based on programming logic controller (PLC). The hardware consists of a personal computer, a PLC controller Q02U CPU, a four-axis motion control module QD75D4N, a two-axis permanent magnet linear synchronous motor stage, and Copley digital drives. In the first, the non-uniform rational B-splines (NURBS) curve applies to the trajectory planning of graphic engraving. The parameters in NURBS are designed to describe the desired carving contour. The curvatures and the rate of change of curvature are then computed at every contour point. The thesis proposes an intelligent programming of feed rate to improve the precision of carving based on a fuzzy logic system (FLS). The inputs of FLS are the curvature and the rate of change of curvature, and the output is the feed rate. The parameters of motion control are set in the four axis motion control module QD75D4N according to NURBS and intelligent feed rate. Schneider Electric XBTGT5330 HMI is used to design the graphical user interface to simplify the user operation. Finally, carving experiments with five different patterns are performed on the PLC-based system to verify the effectiveness of the proposed method.
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Lin, Chung Ying, and 林忠穎. "Development of a Compensation Technology for Angle Parameters of a Linear Axis." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/ayh8ku.
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碩士國立虎尾科技大學
自動化工程研究所
102
The geometric errors is one of the key indicators to define performance of machine tools. In order to improve the precision, the error of the machine tools should be measured and improved. In this accuracy, the geometric error model of the five-axis machine tool, using homogeneous transformation matrix has been proposed. The model based on the ISO standard is composed of 43 geometric errors. In this paper. The correctness of the proposed geometric model was carried out by the laser interferometer. According to the ISO standard, the three rotational and three translational errors of a single-axis case error in position on a workpiece. In position and horizontal straightness error measurement process, the measurement results will be effected by modifying the angle parameters in different position. For example, the YAW angle error of Y-axis will effect the straightness of X-direction and positioning of Y-direction. In this thesis, a path compensation program based on calculating formula has been proposed. The error can be compensated less than ±2 μm quickly.
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Chou, Ching-Tang, and 周敬棠. "The development of the linear axis measurement system of Meso-Scale machining." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/9mt787.
Full textAbstract:
碩士國立虎尾科技大學
動力機械工程研究所
92
In this thesis, the two linear axis measurement systems for the Meso-scale machining were developed: (1) the laser triangulation measurement system for linear axis performance measuring, and (2) two PSDs and lasers with fixtures measuring system for linear axis performance measuring. It is easy to set up the laser triangulation measurement system. In addition, its measuring principle is simple and the system can be applied to 1D、2D、3D linear axis measurement. However, price of the component is expensive and the result of the measurement is not satisfying enough, so it is only studied in verifying and 1D measuring without going any further exploration. The PSDs measurement system consists of 2 laser and 2 PSDs with the fixtures. So far, both software and hardware were established in this measurement system through verifying and testing. Its accuracy can be up to 0.5μm、the uncertainty can be up to 1μm, and it is easy to measured 1D、2D、3D static and dynamic error of linear axis of the Meso-scale machining. Besides, the measurement system was focused on high feed rate of the machining stage, analyze the contouring to estimate performance of the controller of machining. And the error as a result of high feed rate of the machining stage was compensated with Taguchi methods. The result is reasonable. It can be compensated since original error in 250μm-500μm to be reduced in 10μm in the optimum state.
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Chu, Ming-Feng, and 褚明灃. "High Performance Servo Control on Vertical Axis of Linear Motor Machine Tool." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/52835613237151203227.
Full textAbstract:
碩士國立成功大學
製造工程研究所碩博士班
93
Today the technology of machine tools is highly developed, and the features of products are high precision, high quality and short lifecycle. Hence advanced machine tools must achieve goals of high speed and high precision. The characteristics of linear machine tools are high acceleration, accurate positioning, because they do not have ball screw, gear and transmission mechanism. Therefore linear machine tools do not have problems like backlash and deflection, but have better positioning and acceleration. In the case of vertical axes, traditional machine tools are usually composed of servo motors and ball screws. The screws can provide friction against gravity force while vertical axes move down. However, linear machine tools do no have ball screws to support themselves; they are easy to be influenced by gravity force. Hence, this thesis is going to propose a method about how to improve positioning precision on vertical axes in linear machine tools. The control strategy of high performance servo controllers adopts disturbance observer and a proportional controller to constrain disturbance and to obtain faster response in velocity loop. Disturbance observers can constrain disturbance and noise by tuning low-pass filters. Position loop controllers can improve transient response; however they have a problem of phase lag. Hence, this thesis utilizes a ZPETC to compensate this lag. In addition, this thesis also adopts an atmospheric pressure system to compensate gravity force and implements a high performance controller for linear motors on vertical axes.
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Hsu, Pojung, and 許博榕. "The Assembly Detection of Linear Transmission Mechanism for A Five-Axis Machine Tool." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/93328406360109298247.
Full textAbstract:
碩士大葉大學
機械與自動化工程學系
100
According to the general specifications, a machine constructive standard for technicians hands-on shop is established in this paper. Considering the future manufacturing process model portability and precision, the development of reassembly or decomposibility small Precision Machine (DPMT, decomposibility precision machine tool) is build to cope with the demand for small parts precision machining. This DPMT combine with two major machine modules: two axes of rotating mechanism and three axes of linear mechanism. The linear drive mechanism with the advantages of high rigidity and high precision can be easily retained after the reassembly of DPMT; with the advantages of rotating flexibility with complex geometries, cutting ability, so will constitute a precision five-axis machine tool. Machining parts will up to satisfactory surface roughness and also by reducing the number of replacement fixtures and improve its accuracy. The TRIZ contradiction matrix to create new ideas. We first analyze the origins of machine tool geometric errors, and in the assembly process, during each assembly step in the development of rigorous inspection of installation operations and standards to effectively reduce the possible accumulation of errors. For all machine equipments, no matter what processes there will be, all the participating engineers will face the challenge of errors. Those processes include the initial design, component production and assembly，servo motion control and even machine operation. No matter when and how a problem will occur, when it comes to the final precision requirement for the machine application, there must be someone to investigate the reason for the error of every stage and the measure about how to avoid or eliminate. In particular five-axis machine tools, its geometric relation of machinery movement is much more complicated than a normal 3-axis machine. Thus, a deeper understanding is required to win the leading advantage of the equipment performance and quality in the assembly stage. In this study, base on ISO230 specification, combine with three-axis machine tools assembly detection experience, summarize a procedure standard to construct small precision CNC machine tools for unskillful technicians.
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You, Kai-Siang, and 游凱翔. "Non-linear vibration of blade bending and fluttering of vertical axis wind turbines." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/75579716003645920511.
Full textAbstract:
碩士國立臺灣大學
應用力學研究所
101
Vertical axis wind turbine has the benefit of operation that is independent of the direction, and less noise. In recent years there are more and more people involved in research of VAWTs. In this present paper, we adopt NACA0015 to be analysis model. Using nonlinear analysis to analyze resonance and stability of amplitude – force frequency relation of wind blade . The nonlinear term is cause by the axial force that owing to bending deformation. We start form basic theory of mechanics of materials. To find the strain potential energy and retained to the second order nonlinearity. Consider the kinetic energy of operating VAWTs. Using the Hamilton’s principle to derive the governing equation and then dimensionless the equation. Consider real condition to simplify the governing equation. Appling Galerkin’s method to equation and get the amplitude force frequency relation for different frequency. Using perturbation methods to designate the stable and unstable zones. In linear system the leading edge direction is uncouple, and the other bending direction is couple with torsion. So we first consider the bending and torsion coupling equation. In the last part of section we consider the two bending equation to compared with above. Simultaneously applied Runge-Kutta fourth order method to solve equation. And using FFT to analyze the result. Then use different method to present the result. Finally make a verification by compare the analysis and numerical result.
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HSU, MIN-TSE, and 許閔澤. "Contour Tracking of Dual Axis Linear Motor Drive Systems Based on NURBS Curve." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/fz6zve.
Full textAbstract:
碩士大葉大學
機械與自動化工程學系
105
This thesis developed contour tracking of dual Axis linear motor drive systems based on NURBS curve. A personal computer, a PCI-1240U motion control card and a linear motor gantry were integrated in hardware system. The study wrote a trajectory planning and motion control program using LabVIEW software development platform to achieve the automatic engraving of free curve patterns. Firstly, the NURBS curve was used to plan the trajectory of the engraved pattern, and the curvatures and curvature change rates of track points were calculated. According the curvatures and curvature change rates, an intelligent feed rate was developed based on a fuzzy logic system to obtain the feeding speed of the trajectory. Next, man-machine interface and axis control program were written to achieve the track planning and motion control of the gantry linear motor drive system using Matlab and LabVIEW software. The proposed method assured the high-speed and high precision machining control.Finally, the feasibility of the proposed method was verified by actual graphic engraving experiments.
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Cai, Jhih-Sian, and 蔡志賢. "On-line Measurement for the Straightness and Angular Motions On the linear axis." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/hs725q.
Full textAbstract:
碩士國立虎尾科技大學
光電與材料科技研究所
98
An integrated system for measuring optical path is designed and developed in this research. This system involves two straightness measuring modules adopting collimation invisible light LEDs with a 1D bi-cell detector to estimate the pitch and the yaw of a precision platform, and one angle measuring module with an optical pickup head and a 2D quadrant detector to probe the roll of the precision platform. The system is used directly to a translational platform and is shown to be easily-fabricated and quickly-measuring to support real-time operation through applying the elements to a mobile platform. The experimental Results can be examined by both of the straightness measuring system of HP laser interferometer and the angle measuring system of a Laser Autocollimator.
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CHOU, KUAN-TING, and 周冠廷. "Implementation of Three-Axis Motion Control for Linear Delta Robot using the FPGA." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/fu4tj2.
Full textAbstract:
碩士國立虎尾科技大學
電機工程系碩士班
107
This paper proposes to design a linear Delta robot three-axis motion control based on Three Spheres Intersection Algorithm with FPGA, and verify the object disassembly and combined processing mode flow with CNC instruction, and use Field Programmable Gate Array (FPGA) implements the architecture of System On a Programmable Chip (SOPC). Use this platform to complete the trapezoid velocity profile to drive the stepping motor of this system to control the acceleration and deceleration effect and avoid stepping motor out of step, and pass Forward Position Kinematics (FPK), Inverse Position Kinematics (IPK) and Three Spheres Intersection Algorithm to calculate the parameters required for the movement of the linear Delta robot in space coordinates, and installed on the scanning tuning fork probe as the correction sensing end, and adding the inclination correction To compensate. At the end of this paper, the standard G-code command used by Computer Numerical Control (CNC), which is widely used in industry, is used to control the Linear Delta Robot for object combination and disassembly processing mode to verify the feasibility of the system.
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Hsu-Chun-Ting and 徐浚庭. "High-precision Position and Contour Tracking Control for Two-axis Linear Motor Drives." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/65152593990879006040.
Full textAbstract:
碩士大葉大學
機械與自動化工程學系
101
This thesis proposes an intelligent cross-coupled controller for the trajectory tracking of two-axis permanent magnet linear synchronous motor (PMLSM) driver systems. Based on the basic crossed-coupled configuration, a cross-coupled controller is firstly designed by using the fuzzy logic system. A mathematical formula is then derived to calculate contouring errors that is fed to the proposed intelligent cross-coupled controller. The contouring errors are immensely reduced to complete the high-precision tracking performance through synchronously compensating the contour-tracking errors in each axis of PMLSM drive systems. The experimental setup is comprised by a host computer, two servo control boards, two motor drivers and a two-axis PMLSM table. The proposed control algorithm is implemented using Microsoft Visual C++. Finally, experiments on a practical two-axis PMLSM table confirm the effectiveness of the proposed methods.
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Liang, Tun-Hao, and 梁敦皓. "A Real-Time Measurement System for the Fabrication Inspection of Linear and Rotary Axes in A 5-Axis Tool Grinder." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/42qtfs.
Full textAbstract:
碩士國立虎尾科技大學
創意工程與精密科技研究所
99
Due to rapid developments in the modern cutting technology, the demand for all kinds of high precision tools will relatively increase. The grinding manufacturing for cutting edge of tools is known as the most important and the final procedure. It is also a critical issue for determining the geometrical profiles, cutting performance, wear on the cutting edge, and tool life. Therefore, this study is concerned with the development of a real-time measurement system for the error inspection and compensation of linear and rotary axes during fabrication of 5-axis tool grinder. The major components include the self-developed mechanical fixtures, the data acquisition system and HMI formation etc. During fabrication of rotary axis, accurate positioning and indexing measurement can be realized by this real-time inspection system. With the aid of this proposed system, errors of each axis will be minimized and the optimal fabrication can be achieved. The developed real-time measurement system can be utilized for the inspection of single axis and the simultaneous inspection of dual axes in a 5-axis tool grinder. Besides, their error compensation can be also performed by this system. To verify the measurement performance of this system, the dimensional precision characteristics of ground cutters will be regarded as the evaluation reference. The results show that the geometrical accuracy of the diameter will be enhanced to0.01mm with positioning compensation. And the spiral geometrical accuracy will be improved to 0.11degrees. Hence it can be proved that the performance of tool grinder has been promoted and the precision and quality of ground cutters have been also advanced by the proposed real-time measurement system for fabrication inspection and compensation of linear and rotary axes in a five-axis tool grinder.
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Weng, Jen-Yen, and 翁仁彥. "Multi-axis Linear Motor Motion Control System with Web-based Remote Monitoring and Control." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/40550242950091797031.
Full textAbstract:
碩士國立臺北科技大學
機電整合研究所
90
The purpose of this thesis is to study the remote control techniques for a PC-based multi-axis linear motor controlled machine. A user friendly remote monitoring and control program is developed under the instrument control software environment of LabWindows/CVI. In order to develop a high efficient remote monitoring and control system, different transmission techniques are used to evaluate their individual pros and cons. In this study, the controlled plant is a machine equipped with dual-axis linear motors with maximum output force as 3000 N, maximum continuous speed as 1.8 m/sec, maximum acceleration as 1.5G, and position accuracy as 1 μm. Three types of remote control techniques, TCP/IP, DataSocket and AppletVIEW, are elected for investigation. The system’s functions such as the downloading of G/M code, real time monitoring and control of motion paths, and sequential control commands during transmission are time-optimized through the use of a real time control methodology executed at the local computer. The developed remote monitoring and control system provides an effective solution with high compatibility for cross-platform applications, and is adequate for various types of high speed precision machine tools.
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LUO, YONG-TAI, and 羅詠泰. "Design and verification of six degree-of-freedom geometric errors measurement system for linear axis." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/fxb5ep.
Full textAbstract:
碩士國立中正大學
機械工程系研究所
105
In this paper, a new kind of non-contact optical measurement system for six-degree-of freedom error measurement of linear axis of machine tools was presented. The measurement system can simultaneously measure six-degree-of freedom error and has low cost advantage, and the commercial parts of optical measurement instruments can only measure one error with one set up and it’s expensive. The proposed measurement system is constituted of a laser sources, three two-dimensional position sensitive detectors, one planar mirrors, two beamsplitters, eight lens, two penta prisms and a corner cube. For applying the basic physical optics theory and methods of skew-ray tracing to the principle of measurement, the measurement system model was implemented by using the ZEMAX optical design software and matlab software to established the architecture of the system. To implement the system, we will verify the feasibility of the proposed system with qualitative and quantitative analysis respectively. The qualitative analysis is to observe the characteristics and trends of the system, and the quantitative analysis is using the skew ray-tracing method to derive the actual laser light transfer within the proposed measurement system. After finish those analysis, we will erect the measurement system, and compare the performance of this system with a laser interferometer.