Journal of Drive and Control (드라이브 ㆍ 컨트롤)

The Korean Society for Fluid Power and Construction Equipment (유공압건설기계학회)
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Position Control of an Electro-hydraulic Servo System with Disturbance

외란을 갖는 전기유압 서보시스템의 위치제어

  • Huh, Jun Young (School of Mechatronic Engineering, Korea University of Technology and Education)
  • Received : 2021.05.28
  • Accepted : 2021.06.21
  • Published : 2021.09.01
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Abstract

In a hydraulic control system, since a hydraulic cylinder drives a relatively large mass of an object, an external load force acts as a disturbance on the control performance of the system. Additionally, as the hydraulic system is used for a long period, there are disturbances that occur gradually, such as a drop in supply pressure because of abrasion of the pump, oil leakage from a valve, and oil leakage from a cylinder. In this study, a state feedback controller based on a linearization technique is applied. To prevent the performance degradation of the controller from the load disturbance, an Extended Luenberger observer (ELO) is used for the Extended system. The case of using the proportional controller, which is a representative linear controller, and the result of using the controller designed in this study are compared and reviewed through simulation. Also, we propose an experimental gain-setting method for a state feedback controller that can be used at industrial sites, and examine how the stability and control performance of the system changes because of the disturbance inputs through the experimental results.

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Acknowledgement

이 연구는 2021년도 한국기술교육대학교 교수 교육연구진흥과제 지원에 의하여 수행되었음을 밝힙니다.

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