Title :
Analysis and compensation for friction in electro-hydraulic servo system
Author :
Cheng, Junlan ; Wang, Xiaoguang
Author_Institution :
Dept. of Mech. Eng., North China Inst. of Aerosp. Eng., Langfang, China
Abstract :
Friction in the electro-hydraulic servo system makes tracking and pointing accuracy lower, it is one of the most important influence factors. This paper proposes a nonlinear adaptive friction compensation method based on analysis of the position-control system of valve-control asymmetrical hydraulic cylinder and the LuGre friction model. Dual nonlinear observers were constructed to estimate the friction state, which is unmeasurable in the electro-hydraulic servo system, and adaptive laws of friction parameters were built to compensate dynamic friction. Finally the application of Simulink has proven this method is validity.
Keywords :
adaptive control; electrohydraulic control equipment; friction; nonlinear control systems; observers; position control; servomechanisms; shapes (structures); LuGre friction model; electrohydraulic servo system; friction analysis; nonlinear adaptive friction compensation method; nonlinear observers; position control system; valve-control asymmetrical hydraulic cylinder; Adaptation model; Adaptive systems; Force; Friction; Pistons; Servomotors; Valves; Dynamic friction; LuGre model; Simulink; compensation;
Conference_Titel :
Consumer Electronics, Communications and Networks (CECNet), 2011 International Conference on
Conference_Location :
XianNing
Print_ISBN :
978-1-61284-458-9
DOI :
10.1109/CECNET.2011.5768974
