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http://dx.doi.org/10.7839/ksfc.2021.18.3.016

Position Control of an Electro-hydraulic Servo System with Sliding Mode  

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. 16-22 More about this Journal
Abstract
The variable structure controller has the characteristic that while in sliding mode, the system moves along the switching plane in the vicinity of the switching plane, so it is robust to the parameter fluctuations of the plant. However, a controller based on a variable structure may not meet the desired performance when it is commanded to track any input or exposed to disturbances. To solve this problem, a sliding mode controller based on the IVSC approach excluding an integrator is proposed in this study. The proposed sliding mode control was applied to the position control of a hydraulic cylinder piston. The sliding plane was determined by the pole placement and the control input was designed to ensure the existence of the sliding mode. The feasibility of the modeling and controller was reviewed by comparing it with a conventional proportional control through computer simulation using MATLAB software and experiment in the presence of significant plant parameter fluctuations and disturbances.
Keywords
Electro-hydraulic servo system; Position control; Sliding Mode; Extended Luenberger Observer; Disturbance;
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