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Control of the Hydraulic System Using the Global Sliding Mode Control  

최형식 (한국해양대학교 기계정보공학부)
김명훈 (한국신발피혁연구소 자동화연구실)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.27, no.2, 2003 , pp. 218-228 More about this Journal
Abstract
A hydraulic system is modeled as the second order differential equation with uncertain system parameters and disturbance composed of modeling errors. To Position the load of the hydraulic system to a desired point. the servo valve of the hydraulic system is controlled. As a control scheme. a global sliding mode control(GSMC) is Proposed Since the servo valve has a torque limit. the GSMC is designed to coordinate the position of the load along the minimum time trajectory within the torque limit. The Proposed control scheme can be designed with ranges of parametric uncertainties and specified torque limits. By the proposed control scheme, the closed form solution of the arriving time at the desired position can be estimated.
Keywords
Lobal Sliding Mode Control; Hydraulic System; Uncertain System;
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