Research on robust adaptive control algorithm of position-control system based on valve-controlled hydraulic cylinder with variable pressure

摘要

This paper studies the control algorithm of the servo valve in electro-hydraulic servo system with variable pressure. The Hinf robust model is designed based on the variable parameters, and the Hinf robust adaptive controller is designed based on the Hinf robust model. The MIT adaptive control algorithm exist defect which is liable to failure due to the initial state of position-control system based on valve-controlled hydraulic cylinder. According to the defect of the MIT adaptive control algorithm, the system pressure will be measured to calculate an initial value of the MIT adaptive control algorithm. Finally, the simulation verifies that the modified Hinf robust and adaptive controller can restrain the impacts of the changes of the system parameters on the electro-hydraulic servo system.