Anti-windup制御のためのΔΣ変調器による量子化

抄録

This paper considers a control system that has saturation and quantization of its control input. A system with saturation may be suffered from windup. Then, quantization generates quantization errors, which may deteriorate control performance. In this paper, the windup is mitigated by an anti-windup controller, whereas the effect of the quantization errors is reduced by a ΔΣ modulator. To keep the stability obtained by the anti-windup controller, the ΔΣ modulator is tuned off when the control signal is saturated. The ΔΣ modulator is designed to minimize the H₂ norm of the transfer function from the quantization error to the system output. Numerical examples are provided to demonstrate the performance of our proposed system.