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Mathematical Problems in EngineeringVolume 2013 2013, Article ID 805687, 8 pages

Research ArticleSchool of Electronic Information Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China

Received 6 February 2013; Accepted 1 April 2013

Academic Editor: Yang Yi

Copyright © 2013 Xinyu Wen. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper is concerned with disturbance-observer-based control DOBC for a class of time-delay systems with uncertainsinusoidal disturbances. The disturbances are decomposed as precise and uncertain parts using nonlinear disturbance observer DOafter appropriate coordinate transformation. And then the two parts can be compensated by corresponding controller, respectively,such that the classic DOBC method is extended to uncertain disturbance rejection. One novel feature of the proposed method isthat even if the precise disturbance parameters are inaccessible, the merits of DOBC can be inherited. By integrating the disturbanceobservers with feedback control laws with time delay, the disturbances can be rejected and the desired dynamic performancescan be guaranteed. Finally, simulations for a flight control system are given to demonstrate the effectiveness of the results.





Autor: Xinyu Wen

Fuente: https://www.hindawi.com/



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