Volume 31, Issue 18 pp. 9397-9415
RESEARCH ARTICLE

Adaptive event-triggered control for MIMO nonlinear systems with asymmetric state constraints based on unified barrier functions

Sanxia Wang

Sanxia Wang

School of Mathematics Science, Liaocheng University, Liaocheng, China

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Jianwei Xia

Corresponding Author

Jianwei Xia

School of Mathematics Science, Liaocheng University, Liaocheng, China

Correspondence Jianwei Xia, School of Mathematics Science, Liaocheng University, Liaocheng 252000, China.

[email protected]

Ju H. Park, Department of Electrical Engineering, Yeungnam University, Kyongsan, 38541, Republic of Korea.

[email protected]

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Ju H. Park

Corresponding Author

Ju H. Park

Department of Electrical Engineering, Yeungnam University, Kyongsan, Republic of Korea

Correspondence Jianwei Xia, School of Mathematics Science, Liaocheng University, Liaocheng 252000, China.

[email protected]

Ju H. Park, Department of Electrical Engineering, Yeungnam University, Kyongsan, 38541, Republic of Korea.

[email protected]

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Hao Shen

Hao Shen

School of Electrical and Information Engineering, Anhui University of Technology, Maanshan, China

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Guoliang Chen

Guoliang Chen

School of Mathematics Science, Liaocheng University, Liaocheng, China

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First published: 14 September 2021
Citations: 3

Abstract

The topic of adaptive event-triggered control for multi-input-multi-output nonlinear systems with asymmetric state constraints is considered in this article. First, by introducing unified barrier functions method, the initial system is transformed to a non-constraints system, which brings that the requirement of feasibility conditions could be eliminated and the constraint functions could be relaxed effectively. Then, an adaptive tracking controller is designed by combining some excellent technology, where command filter is utilized to overcome the explosion of complexity, neural network is introduced to approximate unknown nonlinear function, and event-triggered mechanism is proposed to save communication resources. The designed control scheme can make the outputs of the system to track the target trajectories within a small bounded error range, all signals in the closed-loop system are bounded, and all states do not escape the state constraints. Finally, practical and comparative examples are given to verify the effectiveness of the method.

CONFLICT OF INTEREST

The authors confirm that there is no conflict of interest for this article.

DATA AVAILABILITY STATEMENT

All data generated or analysed during this study are included in this published article.

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