Optimal input load disturbance rejection controller design for typical integrating processes based on IMC structure

Abstract

In this paper, an H2 optimal input load disturbance rejection (ILDR) controller for three typical integrating processes with dead time is proposed based on the Internal Model Control (IMC) structure. Different from other load disturbance rejection methods, the proposed design method is to minimizing the ILDR criterion for integrating processes with dead time. Compared with previous advanced control methods, the proposed design method has three main advantages. First, the proposed design method can optimally suppress the input load disturbance. Second, the design procedure is simple. No weight functions need to be chosen in the design method. The designed controller is given in an analytical form. Third, the robustness stability can be achieved by monotonously tuning the parameters given in the designed controller. Numerical simulations are given to illustrate the effectiveness of the proposed method.