• Title/Summary/Keyword: 유압 서어보 시스템

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Fuzzy Controlfor An Electro-Hydrautic Servo System (전기 유압 서어보 시스템의 퍼지제어)

  • 주해호;이재원;장우석
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1993.10a
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    • pp.533-538
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    • 1993
  • 본 논문에서는 퍼지제어 이론을 적용한 전지 유압 속도제어 시스템을 설계하였다, 최적의 퍼지 추론법을 유도하기 위해서 시뮬레이션 프로그램을 개발하여 최적의 샘플링 시간, A/D 및 D/A 변환기의 비트수를 결정하였고, 퍼지 입출력 변수의 형태, 퍼지 관계 행렬의 크기, 비퍼지화 방법 등을 시뮬레이션화하여 최적의 제어조건을 결정하였다, 전기유압 서어보 시스템에 적합한 퍼지 알고리즘은 Lsrsen 추론법, 비퍼지화 방법으로는 무게중심ㅂ버, 9*9 퍼지관계 행렬, 등간격의 삼각형 입출력 변수, 오차의 퍼지집합 및 오차 변화분의 퍼지집합이 각각 40과 5 일때 제어가 가장 잘 되었다. PID 제어방법과 비교할 때 퍼지제어가 우수한 성능을 보였으며,시스템의 등록성이 변할 때도 퍼지제어가 PID 제어 보다 적응이 잘 됨을 확인하였다.

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Improvement of Transient Response Charateristics of a Position Control Hydraulic Servosystem Using Observer (I) (관측기를 이용한 위치제어 유압 서어보 시스템의 과도응답 특성 개선 (I))

  • 이교일;조승호
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.11 no.5
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    • pp.781-788
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    • 1987
  • The state variables estimated in an observer were useed in feedback control of a hydraulic servosystem to increase the system stability and to enhance the system performance. The nonlinear hydraulic servosystem with the inherent nonlinearities due to the square root function of flow equation, the Coulomb friction and so on, was modelled as a fourth order linear hydraulic servosystem. Also, a second order linear system was derived for the observer-controller design. For these models, a fourth order linear observer and a second order linear observer were constructed respectively to evaluate the performance of the observer-based hydraulic servosystem. The results obtained from series of simulation showed that the system which had shown oscillatory phenomenon under proportional control became stable with the same maximum acceleration and velocity that it had started under proportional control.

Fuzzy Control for An Electro-hydraulic Servo System (전기 유압 서어보 시스템의 퍼지제어)

  • Joo, H.H.;Lee, J.W.;Jang, W.S.
    • Journal of the Korean Society for Precision Engineering
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    • v.12 no.12
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    • pp.139-148
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    • 1995
  • In this paper an electro-hydraulic servo system is designed by using a fuzzy control algorithm. In order to drive an optimal fuzzy control system, a simulation program for the control system has been developed. By this program the fuzzifier and defuzzifier, a fuzzy inference method, a fuzzy relational matrix, and a fuzzy inference method are investigated. As a result, Larsen inference method, 9*9 fuzzy relational matrix, and center of area defuzzifier are turned out the best as parameters. Finally this method is compared with the conventional PID algotithm, and showed that the fuzzy control performs better than PID algorithm. The fuzzy control performs very well adap- tation against uncertain disturbances.

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The Experimental Parameter Identification of Electro-Hydraulic Servo Control System (유압 서어보 제어 시스템의 설계 변수 결정의 실험적 고찰)

  • 김영대;강석종;이관섭
    • 제어로봇시스템학회:학술대회논문집
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    • 1991.10a
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    • pp.957-961
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    • 1991
  • The parameters of electro-hydraulic servo system are closely dependent on the variation of system characteristics. Especially the parameter sensitivity is incleased in the servo system with heavy load and wide operating range. This paper shows the effect of parameter variation and the experimental parameter values of high power servo system.

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Position control of the overdamped electrohydraulic servosystem (과잉 감쇠 반응을 나타내는 전기 유압식 서어보)

  • 송창섭;박태규;김세창
    • 제어로봇시스템학회:학술대회논문집
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    • 1987.10b
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    • pp.340-345
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    • 1987
  • This paper is describes the improvement of the transient response of the electrohydraulic position control system which exhibit the over-damped characteristics. A new approach, Position Error Prefiltered Proportional (PEPP) control, is proposed and the computer simulation results for the transient responses are analyzed. Experimental results using Z-80 microprocessor are presented.

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A study on the non-standard PID control for electro-hydraulic servo system (전기 유압 서어보 시스템의 비표준 PID 제어에 관한 연구)

  • Lee, Yong-Joo;Song, Chang-Seop
    • Journal of the Korean Society for Precision Engineering
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    • v.14 no.11
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    • pp.25-33
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    • 1997
  • This study deals with controlling the velocity of Electr-Hydraulic servo system through the non-stan-dard PIC control. This was done as follows. First, we modeled nonlinearised model and linearised model, second designed analytic program for electro-hydraulic servo system velocity control Lastly, to im- prove dynamic characteristics of system we designed non-standard PID contoller and verifed throughth experi- ment and MATLAB program, commercial used software.

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Designing the high performance electro-hydraulic position controller using 3-port servo valve for heavy and unidirectional load system (대부하 편하중 유압시스템의 3-port 서어보 밸브를 사용한 고속제어기 설계 연구)

  • 김영대;이관섭;정인수
    • 제어로봇시스템학회:학술대회논문집
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    • 1989.10a
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    • pp.276-281
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    • 1989
  • Comparison 3-port servo system with 4-port is made to obtain optimal design for heavy and unidirectional hydraulic system, It is concluded that 3-port servo system it more adequate than 4-port for the heavy load system which is usually operated at lower frequencies. High performance electro-hydraulic position controller is designed using 3-port servo valve. It includes dynamic pressure feedback as a inner loop and position feedback as a outer loop.

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Optimal control of a hydraulic servosystem by an observer (관측기에 의한 유압 서어보 시스템의 최적제어)

  • 조승호
    • 제어로봇시스템학회:학술대회논문집
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    • 1986.10a
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    • pp.663-668
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    • 1986
  • State variables of an observer were made use of to realize the optimal position control of a hydraulic servosystem with the inherent nonlinearities. The range of eigenvalues of an observer suitable for the hydraulic servosystem was investigated through computer simulation. The effect of direct state feedback of hydraulic servosystem was compared with that of estimated state feedback using observer to ascertain the possibility of performance increase using observer.

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Analysis of dynamic characteristic for 6 DOF motion simulator driven by hydraulic servo cylinder (유압서어보실린더로 구동되는 6자유도 운동재현기의 동특성 해석)

  • 서정웅;이동권;민병주;이교일
    • 제어로봇시스템학회:학술대회논문집
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    • 1989.10a
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    • pp.1-6
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    • 1989
  • For the design of synergistic hydraulic motion simulator, the load locus method is introduced. The given mass property of load and its velocity profile is resolved into the load locus of each actuator which decides the suitable valve and cylinder. This asymmtic cylinder and 4 way valve system have the pressure oscillation on zero velocity. The variable structure position controller which based on linearized flow equation makes elimination of the unstable pressure oscillation.

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Remote control scheme for cranes using electro-hydraulic servo positioner with coaxial rotary spool (동축 회전형 스풀을 가진 전기 유압 서어보 위치 제어기를 이용한 크레인의 원격제어)

  • 김홍집;김경진;현웅근;서일홍;오상록
    • 제어로봇시스템학회:학술대회논문집
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    • 1990.10a
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    • pp.693-697
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    • 1990
  • A position control system is developed for an electro-hydraulic servo actuator with coaxial rotary spool, where the actuator is controlled by stepping motor. The position control system is utilized to develop the wireless remotely controlled crane system. And remote engine control system is also developed. Finally, to show the validity of this system, some experimental results and field test results am presented.

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