Relevant bibliographies by topics / Closed-loop position-control

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

Academic literature on the topic 'Closed-loop position-control'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Closed-loop position-control"

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Gorbet, R. B., and K. A. Morris. "Closed-Loop Position Control of Preisach Hystereses." Journal of Intelligent Material Systems and Structures 14, no. 8 (August 2003): 483–95. http://dx.doi.org/10.1177/104538903035391.

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Govinda Kumar, E., R. Prakash, S. Rishivanth, S. A. Anburaja, and A. Gopi Krishna. "Control of Antenna Azimuth Position using Fractional order Lead Compensator." International Journal of Engineering & Technology 7, no. 2.24 (April 25, 2018): 166. http://dx.doi.org/10.14419/ijet.v7i2.24.12023.

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This paper addresses the position control of antenna azimuth using proportional and integral (PI) controller and lead compensators. The fractional order calculus plays an important role for designing the robust control. The fractional order lead compensator is proposed for enhancing the closed loop performance of azimuth position control of antenna system. From the comparison of the closed loop responses, the proposed lead compensator delivers a superior closed loop performance when compared with PI controller and lead compensator.
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., Nataraj GS. "POSITION CHARACTERIZATION OF ELECTRO-PNEUMATIC CLOSED LOOP CONTROL VALVE." International Journal of Research in Engineering and Technology 02, no. 12 (December 25, 2013): 616–19. http://dx.doi.org/10.15623/ijret.2013.0212105.

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McCurdy, C. N. "Square One — A Simple Closed Loop Position Control System." Measurement and Control 18, no. 10 (December 1985): 368–71. http://dx.doi.org/10.1177/002029408501801002.

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Shirinzadeh, Bijan, Umesh Bhagat, and Yanling Tian. "Experimental Study of Laser Interferometry Based Motion Tracking of a Flexure-Based Mechanism." International Journal of Intelligent Mechatronics and Robotics 1, no. 3 (July 2011): 31–45. http://dx.doi.org/10.4018/ijimr.2011070103.

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This paper presents an experimental study of laser interferometry-based closed-loop motion tracking for flexure-based four-bar micro/nano manipulator. To enhance the accuracy of micro/nano manipulation, laser interferometry-based motion tracking control is established with experimental facility. The authors present and discuss open-loop control, model-based closed-loop control, and robust motion tracking closed-loop control for flexure-based mechanism. A comparative error analysis for closed-loop control with capacitive position sensor and laser interferometry feedback is discussed and presented. Model-based closed-loop control shows improvement in position and motion tracking over open-loop control. Robust control demonstrates high precise and accurate motion tracking of flexure-based mechanism compared to the model-based control. With this experimental study, this paper offers evidence that the laser interferometry-based closed-loop control can minimize positioning and tracking errors during dynamic motion, hence realizing high precision motion tracking and accurate position control.
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Jiang, Wei Hua, Yuan Cheng Fan, and Zheng Liu. "Double Position Loop Design of AC Servo Drive System." Applied Mechanics and Materials 529 (June 2014): 486–90. http://dx.doi.org/10.4028/www.scientific.net/amm.529.486.

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The loop controller of double position fully closed makes the AC servo drive system acquire a very high position accuracy and speed following which is hard to be achieved for time-varying parameters, load disturbance, AC motors and severely nonlinear controlled objects. For the system, the dynamic nature can be ensured by the inner position loop adopting PI regulation of half closed loop structure, while the stability and the immunity can be achieved by closed loop structures with the rings outside adopting dual-mode fuzzy control. This article analyzes the cause of positioning errors for servo motor and semi-closed loop structure. The article also explains how to design a two position closed-loop servo system based on fuzzy control by adopting the AC servo motor drive, the motor shaft back-end incremental photoelectric encoder to form the inner position loop and using the motion control card, the inner ring of servo system and the work platform of grating ruler to make up the outer position loop. Based on double position loop composed of three-dimensional laser processing gear, the accuracy of the three-axis linkage workbench position control and the speed following can be ensured, thus meeting the requirement of the laser subsurface engraving machine for high speed and high precision motion.
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Zhou, Xin. "The Study of Closed-Loop Position Control System Based on CNC Processing." Advanced Materials Research 941-944 (June 2014): 2243–46. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.2243.

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In view of the existing problems of indirect position closed-loop control, a digitized closed-loop control method is presented and a new kind of position control system with fully digitized closed-loop based on that method is developed. In this way, the fully digitized control of cutter trajectory is implemented with the features of digitized driving, digitized measuring and digitized position control, so that the machining accuracy of the NC machine tools is effectively assured. This system has been used on varieties of NC machine tools and very good results have been obtained in the machining of complex precision parts.
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Lenzhofer, M., A. Tortschanoff, A. Frank, T. Sandner, H. Schenk, M. Kraft, and A. Kenda. "MOEMS translatory actuator characterisation, position encoding and closed-loop control." Microsystem Technologies 16, no. 5 (February 5, 2010): 901–7. http://dx.doi.org/10.1007/s00542-010-1029-5.

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Zhu, Tang, Wang, Jiang, Zhao, and Li. "Absolute Stability Condition Derivation for Position Closed-Loop System in Hydraulic Automatic Gauge Control." Processes 7, no. 10 (October 18, 2019): 766. http://dx.doi.org/10.3390/pr7100766.

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In the metallurgical industry, hydraulic automatic gauge control (HAGC) is a core mechanism for thickness control of plates used in the rolling process. The stability of the HAGC system’s kernel position closed-loop is key to ensuring a process with high precision, speed and reliability. However, the closed-loop position control system is typically nonlinear, and its stability is affected by several factors, making it difficult to analyze instability in the system. This paper describes in detail the functioning of the position closed-loop system. A mathematical model of each component was established using theoretical analysis. An incremental transfer model of the position closed-loop system was also derived by studying the connections between each component. In addition, based on the derived information transfer relationship, a transfer block diagram of disturbance quantity of the system was established. Furthermore, the Popov frequency criterion method was introduced to ascertain its absolute stability. The results indicate that the absolute stability conditions of the position closed-loop system are derived in two situations: when spool displacement is positive or negative. This study lays a theoretical foundation for research on the instability mechanism of an HAGC system.
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Lygouras, J. N., K. A. Lalakos, and P. G. Ysalides. "High-performance position detection and velocity adaptive measurement for closed-loop position control." IEEE Transactions on Instrumentation and Measurement 47, no. 4 (1998): 978–85. http://dx.doi.org/10.1109/19.744653.

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Dissertations / Theses on the topic "Closed-loop position-control"

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Moberg, Stig. "On Modeling and Control of Flexible Manipulators." Licentiate thesis, Linköping University, Linköping University, Automatic Control, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10463.

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Industrial robot manipulators are general-purpose machines used for industrial automation in order to increase productivity, flexibility, and quality. Other reasons for using industrial robots are cost saving, and elimination of heavy and health-hazardous work. Robot motion control is a key competence for robot manufacturers, and the current development is focused on increasing the robot performance, reducing the robot cost, improving safety, and introducing new functionalities. Therefore, there is a need to continuously improve the models and control methods in order to fulfil all conflicting requirements, such as increased performance for a robot with lower weight, and thus lower mechanical stiffness and more complicated vibration modes. One reason for this development of the robot mechanical structure is of course cost-reduction, but other benefits are lower power consumption, improved dexterity, safety issues, and low environmental impact.

This thesis deals with three different aspects of modeling and control of flexible, i.e., elastic, manipulators. For an accurate description of a modern industrial manipulator, the traditional flexible joint model, described in literature, is not sufficient. An improved model where the elasticity is described by a number of localized multidimensional spring-damper pairs is therefore proposed. This model is called the extended flexible joint model. This work describes identification, feedforward control, and feedback control, using this model.

The proposed identification method is a frequency-domain non-linear gray-box method, which is evaluated by the identification of a modern six-axes robot manipulator. The identified model gives a good description of the global behavior of this robot.

The inverse dynamics control problem is discussed, and a solution methodology is proposed. This methodology is based on a differential algebraic equation (DAE) formulation of the problem. Feedforward control of a two-axes manipulator is then studied using this DAE approach.

Finally, a benchmark problem for robust feedback control of a single-axis extended flexible joint model is presented and some proposed solutions are analyzed.

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Liao, James Yu-Chang. "Evaluating Multi-Modal Brain-Computer Interfaces for Controlling Arm Movements Using a Simulator of Human Reaching." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1404138858.

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Korsa, Filip. "Revitalizace testeru regulace hydraulických obvodů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230422.

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High-quality simulation of hydraulic mechanism saves the time and other costs associated with the changes of inappropriately designed circuit. The aim of this thesis is to revitalize the test rig intended for simulating hydraulic circuits in order to verify the results of the simulation program Hyvos used internally by Bosch Rexroth Company. It is expected that the simulation of the hydraulic machinery cycles under the influence of disturbances will be carry out on the test rig and measured data are compared with results of the virtual models which are designed using the mentioned software Hyvos. The work deals with the so called position and pressure control which represent the classical modes of pressing machines or hydraulic press brakes operation cycles. The parameters of the hydraulic closed-loop axis controller for electrohydraulic drives (HACD) are set using the software Bodac.
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Lin, S. W., and 林旭文. "Closed-loop Position Control and Ministep-Driving of Stepping Motors." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/97681020822451227936.

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碩士
淡江大學
機械工程研究所
83
Stepping motors are widely used as actuators of position devices in industrial applications. the stepping motor is characterized as a device of simple structure, ease fabrication, and low cost. However, the system equations of the stepping motors are nonlinear and the open loop control only possible in the case of low speed and small loading. A commercial stepping motors usually equipped with a driving device of 200 steps per revolution such that the motor can not adjust the position within 1.8 degree precisely. 　　In this thesis, a closed-loop position control law based on a feedback linearization is proposed. This technique transforms the state space and linearizes the system equations. We also develop a voltage controlled pulse-width modulation (PWM) which drives the stepping motor and performs precision position controls.
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Chen, Chien-Fan. "Closed-loop Real-time Control of a Novel Linear Magnetostrictive Actuator." 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8470.

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This thesis presents the design of various closed-loop real-time control of a novel linear magnetostrictive actuator. The novel linear magnetostrictive actuator which uses Terfenol-D as the magnetostrictive material was developed by Sadighi. It solves the problem of power consumption in a conventional magnetostrictive actuator. However, the control system of this magnetostrictive actuator cannot control the current in the coils, which limits the performances of the real-time position control. In the closed-loop real-time control system proposed in this thesis, the controller is designed depending on the change of current. The closed-loop real-time control design focused on the position control of the active element in the novel linear magnetostrictive actuator. The closed-loop position-control system of the linear magnetostrictive actuator was successfully designed by implementing a closed-loop current-control system as an inner loop of the entire control system. This design offers the flexibility to design various position controllers in the closed-loop position-control system. The closed-loop current-control design uses pulse-width modulation (PWM) signal to change the current in the coils of the novel linear magnetostrictive actuator. By changing the duty ratio of the PWM signal, the current in the coils can be changed from zero to its maximum value. With a current controller using an integrator with a gain of 10, the current can be controlled with high response time and an error of /- 0.01 A. The position-controller design was successfully conducted by using four different approaches. First, a proportional-integral-derivative (PID) controller which was designed by relay-auto tuning method with experiments exhibited a position error of ±1 μm with a 5 μm peak-to-peak position noise. Second, a PID controller which was designed by root-locus can control the position with a position error of /- 3-4 μm with a 5 μm peak-to-peak position noise. Third, a linear variable velocity controller exhibited a position error of /-5 μm with a 5 mu m peak-to-peak position noise. Then, the sliding mode control (SMC) exhibited a position error of /-5 μm with a 5 μm peak-to-peak position noise.
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Book chapters on the topic "Closed-loop position-control"

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Schulz, Günter. "A closed loop control concept for the correction of the conveyor belt position." In Computer Applications in the Mineral Industries, 407–12. CRC Press, 2020. http://dx.doi.org/10.1201/9781003078661-82.

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Conference papers on the topic "Closed-loop position-control"

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"Closed loop pneumatic position control using discrete time model regulation." In Proceedings of the 1999 American Control Conference. IEEE, 1999. http://dx.doi.org/10.1109/acc.1999.786370.

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Evdaimon, Theodoros, Michael Sfakiotakis, and Dimitris P. Tsakiris. "A closed-loop position control scheme for SMA-actuated joints." In 2014 22nd Mediterranean Conference of Control and Automation (MED). IEEE, 2014. http://dx.doi.org/10.1109/med.2014.6961592.

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Torres, James, and H. Harry Asada. "Closed loop position control of a linear PZT poly-actuator." In 2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM). IEEE, 2014. http://dx.doi.org/10.1109/aim.2014.6878087.

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Ge, Cheng-liang, Guo-bin Fan, Zhi-wei Huang, Zhi-qiang Liu, Zhen-dong Li, Jian-tao Wu, Min Wan, Xiao-yang Hu, and Zheng Liang. "Closed-loop high-precision position control system with two modes." In Optical Engineering + Applications, edited by José M. Sasian and Richard N. Youngworth. SPIE, 2008. http://dx.doi.org/10.1117/12.792317.

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Ge, Cheng-liang, Yuan Liao, Zhong-wu He, Zhong-xiang Luo, Zhi-wei Huang, Min Wan, Xiao-yang Hu, Guo-bin Fan, and Zheng Liang. "Closed loop high precision position control system with optical scale." In International Symposium on Photoelectronic Detection and Imaging: Technology and Applications 2007, edited by Liwei Zhou. SPIE, 2007. http://dx.doi.org/10.1117/12.791115.

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Lenzhofer, M., A. Tortschanoff, A. Frank, T. Sandner, H. Schenk, M. Kraft, and A. Kenda. "Position encoding and closed loop control of MOEMS translatory actuators." In SPIE Europe Microtechnologies for the New Millennium, edited by Ulrich Schmid. SPIE, 2009. http://dx.doi.org/10.1117/12.820335.

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Ivanovic´, Vladimir, Josˇko Deur, Matthew Hancock, and Francis Assadian. "A Closed-Loop Strategy of Active Differential Clutch Control." In ASME 2009 Dynamic Systems and Control Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/dscc2009-2668.

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The paper presents experimentally supported control-oriented analysis of dynamics of an active differential wet clutch actuated by a geared DC motor. A closed-loop clutch control strategy is proposed. The strategy is based on experimentally obtained hysteresis-free clutch applied force vs. motor position curve and related closed-loop motor position control. A controller algorithm is proposed to compensate for the effect of clutch free-play variations due to clutch wear. The proposed control strategy performance is verified on a wet clutch experimental setup.
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Ahmed, Numair, and Placid Ferreira. "Closed-Loop Control of Soft Active Composites." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52587.

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This paper presents the possibility of closed-loop regulation of position or force at features (posts) on an active composite membrane. Active composite membranes are multilayered membranes with different functions, actuation, sensing, interconnect, mechanical compliance tuning assigned to them. Here we demonstrate the ability to perform closed-loop control on an array of four posts on a membrane stamp designed for micro-transfer printing. The paper also assesses the positioning and force resolution obtaining from such membranes.
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Daiwei Feng, Dagui Huang, Xiaogang Huang, and Sicong He. "Double position closed loop fuzzy control of great inertia system with backlash." In 2008 IEEE International Conference on Mechatronics and Automation (ICMA) (Formerly ICIMA). IEEE, 2008. http://dx.doi.org/10.1109/icma.2008.4798812.

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Yershov, Roman D., Volodymyr P. Voytenko, Volodymyr A. Bychko, and Yevhenii V. Kuts. "FPGA-based Frequency and Phase Comparators for Closed-Loop Motor Position Control." In 2019 IEEE International Conference on Modern Electrical and Energy Systems (MEES). IEEE, 2019. http://dx.doi.org/10.1109/mees.2019.8896540.

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