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A Study on the Position Control of an Electro-Hydraulic Servomechanism Using Variable Structure System

가변구조를 이용한 전기-유압서보계의 위치제어에 관한 연구

  • 허준영 (현대중공업 건설장비연구실) ;
  • 권기수 (부산대학교 대학원) ;
  • 하석홍 (부산대학교 대학원) ;
  • 조겸래 (부산대학교 공대 기계공학과) ;
  • 이진걸 (부산대학교 공대 정밀기계공학과)
  • Published : 1989.03.01

Abstract

This paper describes the application of the variable structure control(VSC) concept for the position control of an electro-hydraulic servomotor system. The basic philosopy of VSC is that the structure of the feedback control is altered as the state crosses discontinuity surfaces in the state space with the result that certain desirable properties are achieved. The switching of the control function yields total(or selective) invariance to system parameter variations and disturbances, and closed loop eigen value placement in time-varing and uncertain systems. The control scheme is derived, implemented and tested in the laboratory where analog controller have been used to control the representive servosystem. The control system schematics are given and simple results are shown for illustration. And the results of variable structure system for the electro-hydraulic servomotor were compared to that of the fixed structure system when load disturbance and system parameter variation exists.