Key Laboratory of Autonomous Systems and Networked Control of the Ministry of Education

Guangzhou, China

Key Laboratory of Autonomous Systems and Networked Control of the Ministry of Education

Guangzhou, China
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Chen Y.-K.,South China University of Technology | Chen Y.-K.,Key Laboratory of Autonomous Systems and Networked Control of the Ministry of Education | Wang Y.,South China University of Technology | Wang Y.,Key Laboratory of Autonomous Systems and Networked Control of the Ministry of Education | And 2 more authors.
Kongzhi Lilun Yu Yingyong/Control Theory and Applications | Year: 2015

Plant uncertainties make it difficult to design optimal linear quadratic regulator (LQR) feedback controllers. The key issue is that for LQR optimal control design problem, there is no effective way to select proper weighting parameters in the cost function to guarantee the robust stability of the systems. This work investigates the internal model extended LQR optimal control design for the servo system in a communications on the move (COTM) system. Based on the Kalman's equality and the small gain theorem, the robust stability constraints on the weighting parameters in the cost function are elaborated and the quantitative relationship between the robust stability margin and the weighting parameters in the cost function are derived. Finally, the effectiveness of the results in this work is validated by MATLAB simulations and experimental results. ©, 2015, South China University of Technology. All right reserved.


Zhang L.,South China University of Technology | Zhang L.,Key Laboratory of Autonomous Systems and Networked Control of the Ministry of Education | Su W.-Z.,South China University of Technology | Su W.-Z.,Key Laboratory of Autonomous Systems and Networked Control of the Ministry of Education
Kongzhi Lilun Yu Yingyong/Control Theory and Applications | Year: 2014

Servo systems have been widely used in various fields of industry and defense, such as radio telescope antenna servo systems, radar servo systems, 'communication on the move' servo systems, hard disk drive servo systems, metal cutting systems, digital control machines and so on. To meet high demands on the performances of servo systems, many research efforts have been devoted to advanced control design for servo systems. This paper gives a brief review of the existing achievements in control design for servo systems, with antenna servo systems and hard disk drive servo systems taken as examples to explain several issues in this area; such as, the high-frequency resonance, the bandwidth constraint, the external disturbance and so on. Particularly the disturbance rejection, the optimal tracking control and the robust stabilization are discussed in more details.

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