• Title, Summary, Keyword: instrumentation

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Case Study of Shape Design of Load Cell Using Finite Element Method

  • Reaugkittakarn, Saravut;Sripituk, Jettiya;Pongswatd, Sawai;Pannil, Pittaya;Ukakimapurn, Prapart
    • 제어로봇시스템학회:학술대회논문집
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    • pp.2054-2057
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    • 2005
  • In this paper, the application of finite element method to design the shape of load cell as an illustrative case study is described. The relationship between the various shapes of load cell and their stress characteristic were analyzed by COSMOS simulation program. The results obtained from the proposed analysis can be applied to determine the appropriate position of strain gauges for good quality load cell. The experimental results show the good efficiency of the proposed technique.

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A Experimental Study of Stochastic Controller Realizing Technique (실험적 연구를 통한 확률제어기 구현)

  • Lee, Jong-Bok;Kim, Yong-Kwan;Yoon, Young-Soo;Choi, Won-Seok;Heo, Hoon
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.715-718
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    • 2002
  • A control strategy for a dynamic system under Irregular disturbance by using stochastic controller is developed. In order to design stochastic controller. system dynamic model in real domain is transformed dynamic moment equation in stochastic domain by F-P-K approach. A study of real time control technique for stochastic controller is presented. The performance of stochastic controller is verified through experiment used by real time control technique method.

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Development of Electromotion Auxiliary Bicycle (전동보조자전거의 개발)

  • Lee, Hyung-Ki;Choe, Yeon-Wook;Park, Han-Seok;An, Young-Joo;Shin, Bong-Chul
    • Proceedings of the KIEE Conference
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    • pp.2033-2035
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    • 2001
  • 본 연구는 기존의 자전거에 전기 구동장치를 장착시켜서 자전거의 페달링에 의하여 검출된 답력을 이용한 보조 동력 구동장치에 대한 개발이다. 답력의 검출은 불시의치차를 이용한 동력 전달장치를 이용하였다. 이 장치의 입력기어에서 출력기어로 동력을 전달하는 아이들 피니언 기어와 결합된 캐리어를 동력 전달시 발생하는 반력에 의한 각도를 이용하여 토크량을 측정하였다. 동력전달을 할 경우 발생하는 반력에 의한 회전각을 자기센서를 이용하여 답력을 측정하였다. 이 답력을 구동회로에 인가하여 보조동력을 자전거에 인가함에 따라 주행을 쾌적하게 하도록 개발하였으며 실험을 통하여 실용성을 고찰하였다.

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A Suspension Control of A PM-based Magnetic Suspension System (영구자석을 포함한 자기부상시스템의 부상제어)

  • Kim, Jong-Moon;Kim, Choon-Kyung;Park, Min-Kook;Chun, Jong-Min;Pyon, Han-Sub
    • Proceedings of the KIEE Conference
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    • pp.2264-2266
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    • 2001
  • In this paper, some suspension results for a magnetic suspension system with permanent magnet are presented. The electromagnetic model using the equivalent magnetic circuit is shown. And some control simulation results using Matlab/Simulink S/W are presented.

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Fuzzy control system tuning by performance evaluation (성능평가에 의한 퍼지제어시스템 동조)

  • Jeong, Heon;Jeong, Chang-Gyu;Ko, Nack-Yong;Kim, Young-Dong;Choi, Han-Soo
    • Proceedings of the KIEE Conference
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    • pp.682-684
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    • 1995
  • The most effective way to improve the performance of a fuzzy controller may be to optimize look-up values. Look-up values are derived from processes used input-output scale factors, membership functions, rule base, fuzzy inference method and defuzzification. It is powerful way to modify or organize look-up table values. In this paper, We propose the look-up values self-organizing fuzzy controller(LSOFC). We use the plus-minus tuning method(PMTM), scanning values through the processes of addition and subtraction. We show the efficiency of this LSOFC by the results of simulation for nonlinear time-varying plant with unmodelled dynamics.

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A Study on The Characteristics Improvement of Linear Stepping Motor (Linear Stepping Motor의 추력 특성 개선에 관한 연구)

  • Lee, S.H.;Chung, D.Y.;Shin, M.Y.;Jeon, S.K.;Chung, J.H.;Chung, W.S.;Oh, H.S.
    • Proceedings of the KIEE Conference
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    • pp.157-159
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    • 1999
  • We are analyzed the characteristics of maximum thrust and normal force for new model of HB typed LSM by using Finite Element Method and Virtual Work Method. As a result of this paper, it is confirmed that maximum thrust of the enhanced LSM increased 30% without increasing the input energy and the normal force.

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Robust Control of Uncertainty Systems by Fuzzy Auto-Tuning (Fuzzy 자동동조에 의한 불확실성 공정의 견실제어)

  • Ryu, Y.G.;Choi, J.N.;Kim, J.K.;Mo, Y.S.;Hwang, H.S.
    • Proceedings of the KIEE Conference
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    • pp.504-506
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    • 1999
  • In this paper, we propose a method which control parametric uncertainty systems using PID controller by fuzzy auto tuning. We get the error and the error change rate of plant output correspond to the initial value of parameter using the Ziegler-Nickols tuning and determine the new proportional gain$(K_p)$ and the integral time $(T_i)$ from fuzzy tuner by the error and error change rate of plant output as a membership function of fuzzy theory. The Fuzzy Auto-tuning algorithm for PID controller operate to adapt variable parameter of plant in parametric uncertainty systems. It is shown this method considerably improve the transient response at computer simulation.

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Design of The Stable Fuzzy Controller Using State Feedback Matrix (상태궤환행렬을 이용한 안정한 Fuzzy 제어기의 설계)

  • Choi, Seung-Gyu;Hong, Dae-Seung;Ko, Jae-Ho;Ryu, Chang-Wan;Yim, Wha-Yeong
    • Proceedings of the KIEE Conference
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    • pp.534-536
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    • 1999
  • Fuzzy Systems which are based on membership functions and rules, can control nonlinear, uncertain, complex systems well. However, Fuzzy logic controller(FLC) has problems; It is difficult to design the stable FLC and FLC depends mainly on individual experience. Although FLC can be designed using the error back-propagation algorithm, it takes long time to converge into global, optimal parameters. Well-developed linear system theory should not be replaced by FLC, but instead, it should be suitably used with FLC. A new methodology is introduced for designing THEN-PART membership functions of FLC based on its well-tuned state feedback controller. A example of inverted pendulum is given for demonstration of the robustness of proposed methodology.

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Adaptive Fuzzy Controller Design Using Pole Assignment Compansator (극배치 보상기를 가진 적응 퍼지 제어기의 설계)

  • Choi, Chang-Ho;Hong, Dae-Seung;Ryu, Chang-Wan;Jeon, Sang-Yeong;Yim, Wha-Yeong
    • Proceedings of the KIEE Conference
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    • pp.862-864
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    • 1999
  • Adaptive Fuzzy control system is very powerful in nonlinear system, but That system require exactly membership function and parameter. If the membership function and parameter are not exact, the system will generate chattering. Using the Pole assignment compensator can remove the chattering and steepest descent method can reduce the convergence time. In this Paper, this algorithm applicate to the Inverted pendulum, so save proof of algorithm that is to be vigorous.

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Control of a Inverted Pendulum Using Fuzzy-PID Controller (퍼지 PID 제어기를 이용한 도립진자 제어)

  • Shin, Ja-Ho;Hong, Dae-Seung;Ryu, Chang-Wan;Ko, Jae-Ho;Yim, Wha-Yeong
    • Proceedings of the KIEE Conference
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    • pp.859-861
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    • 1999
  • This paper describes the development of a fuzzy gain scheduling scheme of PID controller for inverted pendulum system. Fuzzy rules and reasoning are utilized on-line to determine the controller parameters based on the error signal and its difference. Simulation results demonstrate that better control performance can be achieved in comparison with PID controller using pole placement to control of a Inverted pendulum.

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