Smith predictor-based multiple periodic disturbance compensation for long dead-time processes. Issue 5 (4th May 2018)

• Record Type: Journal Article
• Authors: Tan, Fang; Li, Han-Xiong; Shen, Ping
• Is Part Of: International journal of control. Volume 91:Issue 5(2018)
• Page Start: 999
• Page End: 1010
• Publication Date: 2018-05-04
• Subjects: Multiple periodic disturbances -- Smith predictor -- dead-time -- disturbance rejection control; Automatic control -- Periodicals; Electronic journals; 629.8
• DOI: 10.1080/00207179.2017.1303748
• Languages: English
• ISSNs: 0020-7179

Abstract

ABSTRACT: Many disturbance rejection methods have been proposed for processes with dead-time, while these existing methods may not work well under multiple periodic disturbances. In this paper, a multiple periodic disturbance rejection is proposed under the Smith predictor configuration for processes with long dead-time. One feedback loop is added to compensate periodic disturbance while retaining the advantage of the Smith predictor. With information of the disturbance spectrum, the added feedback loop can remove multiple periodic disturbances effectively. The robust stability can be easily maintained through the rigorous analysis. Finally, simulation examples demonstrate the effectiveness and robustness of the proposed method for processes with long dead-time.