Title :
A comparison study of two disturbance rejection control strategies for hydraulic position servo systems
Author :
Wang, Weirui ; Pan, Shuangxia ; Wang, Fang
Author_Institution :
Inst. of Mech. Design, Zhejiang Univ., Hangzhou, China
Abstract :
In hydraulic position servo systems, the parametric uncertainties, the inherent nonlinear characters of hydraulic system and the large variations of payload affect the tracking precision and robust performance. A disturbance observer based control scheme and an integral extended state observer based nonlinear control scheme called active disturbance rejection control are proposed in this paper. A comparison study of these two disturbance rejection control strategies for hydraulic position servo systems has been undertaken. Simulation and experimental results show that the active disturbance rejection control is much superior in dealing with system dynamic uncertainties and disturbances.
Keywords :
hydraulic systems; nonlinear control systems; nonlinear dynamical systems; observers; position control; servomechanisms; tracking; uncertain systems; active disturbance rejection control; disturbance observer based control; hydraulic position servo systems; integral extended state observer; nonlinear characters; nonlinear control scheme; parametric uncertainties; payload affects; system dynamic uncertainties; tracking precision; Actuators; Control systems; Mathematical model; Nonlinear dynamical systems; Pistons; Robust control; Servomechanisms; Sliding mode control; Uncertainty; Valves;
Conference_Titel :
Industrial Electronics Society, 2004. IECON 2004. 30th Annual Conference of IEEE
Print_ISBN :
0-7803-8730-9
DOI :
10.1109/IECON.2004.1432101
