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http://dx.doi.org/10.7839/ksfc.2021.18.3.001

Position Control of an Electro-hydraulic Servo System with Disturbance  

Huh, Jun Young (School of Mechatronic Engineering, Korea University of Technology and Education)
Publication Information
Journal of Drive and Control / v.18, no.3, 2021 , pp. 1-7 More about this Journal
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.
Keywords
Electro-hydraulic servo system; Position control; State observer; Disturbance;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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