Disturbance observer–based dynamic optimal setting control scheme for processes with nonlinear loops

Abstract

SummaryThis paper is concerned with optimal operational control problems that exist in industries. The performance index is optimized by set points reselection on the operational control layer together with controllers design on the loop control layer. Firstly, the operational indices need to be obtained through some optimization algorithms. Secondly, the widely used PID controllers are adopted to achieve performance optimization in the ideal situation. To minimize performance deterioration caused by harmonic disturbances, the disturbance observer–based optimal setting control is proposed for those industrial processes with nonlinear loops. In the proposed method, the controller structure or parameter is never changed, which is accordant with actual industrial conditions. Finally, numerical simulations are given to demonstrate the effectiveness and convenience of the results.