General Structure of Anti-Windup Control System Based on Left Coprime Factorization.

概要

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In this paper, the general structure of anti-windup control system based on left coprime factorization is proposed. First, the command responses of anti-windup control system are investigated using transfer function description, and the condition for avoiding windup phenomena is derived. The responses can be formulated easily by handling the input saturation as its equivalent input disturbance. Next, the conditions are explained using state space description. This analysis shows that the proposed system has very simple structure. For feedback controller designed by Youla parameterization, the proposed method can obtain the proper estimated value by state observer. For feedforward controller designed by right coprime factorization, the proposed anti-windup controller has the limitation model in the state feedback loop.The effectiveness of the proposed method is shown by some simulation and experimental results.
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