Optimal design of two-degree-of-freedom control scheme for non-minimum phase processes with time delay. (2017)

• Record Type: Journal Article
• Authors: Zhang, Wei; Xia, Lingyue
• Is Part Of: International journal of system control and information processing. Volume 2:Number 1(2017)
• Page Start: 59
• Page End: 73
• Publication Date: 2017
• Subjects: TDOF -- two-degree-of-freedom -- TDOF control -- optimal control -- analytical design -- NMP -- non-minimum phase -- load disturbance rejection; System design -- Data processing -- Periodicals; Information technology -- Periodicals; 003.5
• Languages: English
• ISSNs: 1759-9334

Abstract

This paper proposes an analytical two-degree-of-freedom (TDOF) control scheme for non-minimum phases systems with time delay, which leads to remarkable improvement of regulator capacity for both of reference input tracking and input load disturbance rejection. All controllers that make the closed-loop system internally stable and have no steady-error have been employed firstly. Then, the set-point tracking controller and the disturbance rejection controller are analytically derived in terms of the integral squared error performance specifications. The nominal set-point response is decoupled from the load disturbance response in the adopted TDOF control scheme. In consequence, both of the set-point tracking performance and load disturbance rejection performance can be optimised simultaneously and separately. Finally, an illustrative example is included to demonstrate the superiority of the proposed method.