Robust adaptive control for hydraulic servo position system with unmatched uncertainties

Author

Chang Ru ; Fang Yi-Ming ; Wang Zhi-jie ; Tian Hai-Bo

Author_Institution

Key Lab. of Ind. Comput. Control Eng. of Hebei Province, Yanshan Univ., Qinhuangdao, China

fYear

2011

fDate

22-24 July 2011

Firstpage

3761

Lastpage

3765

Abstract

To deal with the problems caused by unmatched uncertainties and external load disturbance exist in mill hydraulic servo position system, a robust adaptive controller design method is presented in this paper. The controller is composed of a state feedback controller and an adaptive compensator, the state feedback controller is obtained by solving a Riccati equation, and the compensator is obtained by estimating the upper bounds of the unknown external disturbances. It is proved that the global asymptotic stability of the resulting closed-loop system can be guaranteed. Finally, simulation results for the mill hydraulic servo position system illustrate the validity of the proposed algorithm.

Keywords

Riccati equations; adaptive control; asymptotic stability; closed loop systems; control system synthesis; hydraulic systems; position control; robust control; servomechanisms; uncertain systems; Riccati equation; adaptive compensator; closed-loop system; external load disturbance; global asymptotic stability; hydraulic servo position system; mill hydraulic servo position system; robust adaptive controller design method; state feedback controller; unmatched uncertainties; Adaptive control; Backstepping; Robustness; Servomotors; Uncertainty; Global Asymptotic Stability; Hydraulic Servo Position System; Robust Adaptive Control; Unmatched Uncertainties;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (CCC), 2011 30th Chinese

Conference_Location

Yantai

ISSN

1934-1768

Print_ISBN

978-1-4577-0677-6

Electronic_ISBN

1934-1768

Type

conf

Filename

6000954