Abstract
A novel anti-disturbance strategy for a class of uncertain systems is investigated. Besides the unknown frequency sinusoidal, the controlled plant is subjected to bounded noise and unknown nonlinear term simultaneously. Through the construction of auxiliary observer, the sinusoidal is represented in a parametric uncertainty form. Only one unknown scalar needs estimating to construct compensation signal, meanwhile the unwanted nonlinear operation between frequency and equivalent disturbance can be removed. By integrating a feedback control law, all the unexpected dynamics can be rejected and attenuated respectively, where the conditions on the stability and optimal performance are also provided. Finally, a computer simulation example is presented to illustrate the effectiveness and the applicability of the suggested method.
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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
The project was supported by the National Science Foundation of China (61203049,61873346), Shanxi Province Natural Science Foundation(201801D121132), Shanxi Province Innovation Program for Postgraduates (2019SY489,2020SY424). Key R & D Program of Shanxi Province (International Cooperation, Grant 201903D421045), the Qinglan Project of Yangzhou University.
Xin-Yu Wen received his Ph.D. degree from the School of Automation, Southeast University in 2011. His research interests include nonlinear system control design, disturbance observer based control, sinusoidal signal estimation and rejection.
Ruo-Fan Li is now studying for a master’s degree at Taiyuan University of Science and Technology. Her research interests include sinusoidal signal estimation and rejection, disturbance observer based control.
Song-Yin Cao received his Ph.D. degree from the School of Automation, Southeast University, China, in 2011. Now, he is an associate professor at Yangzhou University. His current research interests include anti-disturbance control and estimation, fault-tolerant control, and inertial navigation system.
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Wen, XY., Li, RF. & Cao, SY. Rejection and Attenuation of Multiple Disturbances for a Class of Uncertain Systems. Int. J. Control Autom. Syst. 19, 2511–2518 (2021). https://doi.org/10.1007/s12555-020-0172-8
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DOI: https://doi.org/10.1007/s12555-020-0172-8