A New Anti-Windup Compensator Based on Quantitative Feedback Theory for an Uncertain Linear System with Input Saturation

Applied Sciences

R. Jeyasenthil¹  Seung-Bok Choi¹ 

[1] Smart Structures and System Laboratory, Department of Mechanical Engineering, Inha University, Incheon 22212, Korea;

关键词: quantitative feedback theory (QFT), input saturation;    robust anti-windup;    limit cycle;    describing function;    uncertain linear systems;   

DOI  :  10.3390/app9152958

来源: DOAJ

【 摘 要 】

This paper devotes to the robust stability problem for an uncertain linear time invariant (LTI) feedback system with actuator saturation nonlinearity. Based on a three degree of freedom (DOF) non-interfering control structure, the robust stability is enforced with the describing function (DF) approach for an uncertain LTI system to avoid the limit cycle. A new type of anti-windup (AW) compensator is designed using the quantitative feedback theory (QFT) graphical method, which results in a simple design procedure and low-order AW control system. One of the most significant benefits of the proposed method is free of the non-convexity (intractable) drawback of the linear matrix inequality (LMI)-based approach. The analysis conducted on the benchmark problem clearly reveals that the proposed QFT-based anti-windup design is able to handle both saturation and uncertainty in a very effective manner.

【 授权许可】

Unknown