Regular Papers

International Journal of Control, Automation and Systems 2020; 18(2): 405-414

Published online September 23, 2019

https://doi.org/10.1007/s12555-019-0082-9

© The International Journal of Control, Automation, and Systems

Adaptive Fuzzy Output Regulation for Unmanned Surface Vehicles with Prescribed Performance

Shaobao Li*, Tingting Ma, Xiaoyuan Luo, and Zhenyu Yang

Aalborg University

Abstract

Dynamics of an unmanned surface vehicle (USV) is usually hard to be modeled accurately due to system uncertainties and disturbances, which can significantly reduce system control performance. To guarantee a satisfied control performance under modeling uncertainties and disturbances, a novel control scheme combining adaptive fuzzy output regulation control and prescribed performance control is proposed in this paper. The unknown nonlinear dynamics of the USV is firstly approximated by a fuzzy logic system, and then an adaptive output regulation control law is developed using backstepping approach for the USV to track a reference system while rejecting disturbances and approximation errors induced by the fuzzy logic system. Meanwhile, the prescribed performance control technique is combined to the adaptive output regulation control design to reach a desired control performance in spite of the unknown system dynamics and disturbances. A simulation study is finally provided to demonstrate the effectiveness of the proposed approach.

Keywords Backstepping, fuzzy control, output regulation, prescribed performance, unmanned surface vehicle.

Article

Regular Papers

International Journal of Control, Automation and Systems 2020; 18(2): 405-414

Published online February 1, 2020 https://doi.org/10.1007/s12555-019-0082-9

Copyright © The International Journal of Control, Automation, and Systems.

Adaptive Fuzzy Output Regulation for Unmanned Surface Vehicles with Prescribed Performance

Shaobao Li*, Tingting Ma, Xiaoyuan Luo, and Zhenyu Yang

Aalborg University

Abstract

Dynamics of an unmanned surface vehicle (USV) is usually hard to be modeled accurately due to system uncertainties and disturbances, which can significantly reduce system control performance. To guarantee a satisfied control performance under modeling uncertainties and disturbances, a novel control scheme combining adaptive fuzzy output regulation control and prescribed performance control is proposed in this paper. The unknown nonlinear dynamics of the USV is firstly approximated by a fuzzy logic system, and then an adaptive output regulation control law is developed using backstepping approach for the USV to track a reference system while rejecting disturbances and approximation errors induced by the fuzzy logic system. Meanwhile, the prescribed performance control technique is combined to the adaptive output regulation control design to reach a desired control performance in spite of the unknown system dynamics and disturbances. A simulation study is finally provided to demonstrate the effectiveness of the proposed approach.

Keywords: Backstepping, fuzzy control, output regulation, prescribed performance, unmanned surface vehicle.

IJCAS
June 2024

Vol. 22, No. 6, pp. 1761~2054

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