• Title/Summary/Keyword: Sample Controller

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PI Controller Design for Permanent Magnet Synchronous Motor Drives Using Clustering Fuzzy Algorithm (콜러스터링 퍼지알고리즘을 이용한 영구자석 동기전동기 구동용 PI 제어기 설계)

  • Kwon, Chung-Jin;Han, Woo-Yong
    • Proceedings of the KIEE Conference
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    • 2004.10a
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    • pp.182-184
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    • 2004
  • This paper presents a PI controller tuning method for high performance permanent magnet synchronous motor (PMSM) drives under load variations using clustering fuzzy algorithm. In many speed tracking control systems PI controller has been used due to its simple structure and easy of design. PI controller, however, suffers from the electrical machine parameter variations and disturbances. In order to improve the tracking control performance under load variations, the PI controller parameters are modified during operation by clustering fuzzy method. This method based on optimal fuzzy logic system has simple structure and computational simplicity. It needs only sample data which is obtained by optimal controller off-line. As the sample data implemented in the adaptive fuzzy system can be modified or extended, a flexible control system can be obtained Simulation results show the usefulness of the proposed controller.

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An Adaptive Fuzzy Based Control applied to a Permanent Magnet Synchronous Motor under Parameter and Load Variations (ICCAS 2004)

  • Kwon, Chung-Jin;Kim, Sung-Joong;Won, Kyoung-Min
    • 제어로봇시스템학회:학술대회논문집
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    • 2004.08a
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    • pp.1168-1172
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    • 2004
  • This paper presents a speed controller based on an adaptive fuzzy algorithm for high performance permanent magnet synchronous motor (PMSM) drives under parameter and load variations. In many speed tracking control systems PI controller has been used due to its simple structure and easy of design. PI controller, however, suffers from the electrical machine parameter variations and disturbances. In order to improve the tracking control performance under load variations, the PI controller parameters are modified during operation by adaptive fuzzy method. This method based on optimal fuzzy logic system has simple structure and computational simplicity. It needs only sample data which is obtained by optimal controller off-line. As the sample data implemented in the adaptive fuzzy system can be modified or extended, a flexible control system can be obtained. Simulation results show the usefulness of the proposed controller.

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An Adaptive Fuzzy Tuning Method for the Speed Control for BLDG Motor Drive (BLDC 전동기의 속도 제어를 위한 적응 퍼지 기법)

  • Kwon, Chung-Jin;Han, Woo-Yong;Kim, Sung-Joong;Lee, Chang-Goo;Lim, Jeong-Heum
    • Proceedings of the KIEE Conference
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    • 2003.07b
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    • pp.1142-1144
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    • 2003
  • This Paper presents a speed controller based on the adaptive fuzzy tuning method for brushless DC(BLDC) motor drives under load variations. Generally, the speed tracking control systems use PI controller due to its simple structure and easy of design. PI controller, however, suffers from the electrical machine parameter variations and disturbances. In order to improve the tracking control performance under load variations, PI controller of which the parameters are modified during operation by adaptive fuzzy tuning method. This method based on optimal fuzzy logic system has simple structure and computational simplicity. It needs only sample data which is obtained by optimal controller off-line. As the sample data implemented in the adaptive fuzzy system can be modified or extended, a flexible control system can be obtained. Simulation results show the usefulness of the proposed controller.

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Development of a Temperature Controller for Microwave-assisted Digestion System for Agricultural Samples (농식품 시료 전처리를 위한 마이크로웨이브 분해기용 온도 제어장치 개발)

  • Mo, Chang-Yeon;Kim, Gi-Young;Kim, Hak-Jin;Kim, Yong-Hun;Yang, Kil-Mo;Lee, Kang-Jin
    • Journal of Biosystems Engineering
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    • v.34 no.5
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    • pp.371-376
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    • 2009
  • Microwave digestion is a preferred pretreatment method for agricultural samples because of its quick chemical reaction and minimum loss of analytes. In this research, a feedback temperature controller was developed to control the temperature inside a vessel for the microwave-assisted digestion system. An existing industrial microwave oven was fitted with the temperature controller for controlling inside temperature of the vessel. Four control methods, On/Off, proportional (P), proportional integral (PI), and proportional integral derivative (PID) were used and compared. Experimental results showed that PID control produced best temperature control performance. The PID controller could maintain the temperature of water sample and rice sample in the digestion system with error range of $-2.5{\sim}3.3^{\circ}C$ and $-1.9{\sim}0.5^{\circ}C$ at set temperature of $170^{\circ}C$, respectively.

Adaptive Predictive Control using Multiple Models, Switching and Tuning

  • Giovanini Leonardo;Ordys Andrzej W.;Grimble Michael J.
    • International Journal of Control, Automation, and Systems
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    • v.4 no.6
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    • pp.669-681
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    • 2006
  • In this work, a new method of design adaptive controllers for SISO systems based on multiple models and switching is presented. The controller selects the model from a given set, according to a switching rule based on output prediction errors. The goal is to design, at each sample instant, a predictive control law that ensures the robust stability of the closed-loop system and achieves the best performance for the current operating point. At each sample the proposed control scheme identifies a set of linear models that best characterizes the dynamics of the current operating region. Then, it carries out an automatic reconfiguration of the controller to achieve the best possible performance whilst providing a guarantee of robust closed-loop stability. The results are illustrated by simulations a nonlinear continuous and stirred tank reactor.

Multiple Simultaneous Specification Control of a High Speed Positioning System Driven by a Brushless D.C. Motor (브러시레스 직류 모터로 구동되는 고속 작동기의 다중 동시 사양 제어)

  • Kang Bong-Soo;Kim Soo-Hyun;Kwak Yoon-Keun
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.28 no.8 s.227
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    • pp.1093-1098
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    • 2004
  • This paper presents a close-loop feedback control scheme, which can simultaneously satisfy multiple conflicting control performances, for a high speed positioning system driven by a brushless D.C. motor. With the dynamic model of the motor and proportional-plus-derivative feedback controllers selected as sample controllers, the convex combined feedback controller is formulated for implementing a direct-drive manipulator. Experimental results show that the developed multiple simultaneous specification(MSS) controller can meet desired control performances; maximum overshoot and rise time.

Tracking performance evaluation of adaptive controller using neural networks (신경망을 이용한 적응제어기의 추적 성능 평가)

  • 최수열;박재형;박선국
    • 제어로봇시스템학회:학술대회논문집
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    • 1997.10a
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    • pp.1561-1564
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    • 1997
  • In the study, simulation result was studied by connecting PID controller in series to the established Neural Networks Controller. Neural Network model is composed of two layers to evaluate tracking performance improvement. The reqular dynamic characteristics was also studied for the expected error to be minimized by using Widrow-Hoff delta rule. As a result of the study, We identified that tracking performance inprovement was developed more in case of connecting PID than Neural Network Contoller and that tracking plant parameter in 251 sample was approached rapidly case of time variable.

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A Study on the PID controller auto-tuning (PID제어기 자동동조에 관한 연구)

  • Cho, Hyun-Seob
    • Proceedings of the KAIS Fall Conference
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    • 2009.12a
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    • pp.630-632
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    • 2009
  • The parameters of PID controller should be readjusted whenever system character change. In spite of a rapid development of control theory, this work needs much time and effort of expert. In this paper, to resolve this defect, after the sample of parameters in the changeable limits of system character is obtained, these parametrs are used as desired values of back propagation learning algorithm, also neural network auto tuner for PID controller is proposed by determing the optimum structure of neural network. Simulation results demonstrate that auto-tuning proper to system character can work well.

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A Study of the Development of an Intelligent PID Cjontroller(II) (지능형 PID 제어기 개발에 관한 연구 II)

  • 유연운;이창구;김성중
    • 제어로봇시스템학회:학술대회논문집
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    • 1993.10a
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    • pp.847-852
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    • 1993
  • In this paper, we present a recursive algorithm for the auto-tuning of PID controllers by optimizing a GPC criterion. Also, we develop an intelligent PID controller by combination of a recursive algorithm together with a supervisor, that allows to adjust the main controller parameters (prediction horizon, control weighting, sample time etc.) using some simple rules which is mainly built up through relay tuning experiments. The intelligent PID controller has been implemented successfully on an IBM PC/AT and some simulation results are presented.

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Effects of the Sampling Time in Motion Controller Implementation for Mobile Robots (모바일 로봇 모션 제어에 있어 샘플링 시간의 효과)

  • Jang, Tae-Ho;Kim, Youngshik
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.37 no.4
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    • pp.154-161
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    • 2014
  • In this research we investigate motion controller performance for mobile robots according to changes in the control loop sampling time. As a result, we suggest a proper range of the sample time, which can minimize final posture errors while improving tracking capability of the controller. For controller implementation into real mobile robots, we use a smooth and continuous motion controller, which can respect robot's path curvature limitation. We examine motion control performance in experimental tests while changing the control loop sampling time. Toward this goal, we compare and analyze experimental results using two different mobile robot platforms; one with real-time control and powerful hardware capability and the other with non-real-time control and limited hardware capability.