Regular Papers

International Journal of Control, Automation and Systems 2023; 21(2): 429-439

Published online January 30, 2023

https://doi.org/10.1007/s12555-021-0999-7

© The International Journal of Control, Automation, and Systems

Adaptive Fixed-time Output Feedback Tracking Control for Uncertain Nonlinear Systems

Shuchao Hou and Lin Zhao*

Qingdao University

Abstract

This article studies the fixed-time output feedback tracking control based on the command filtered backstepping method for nonlinear systems. The approximation technique of neural network is used to estimate uncertain dynamics. The fixed-time filter is introduced to overcome the problem of complexity explosion, and combined with the compensation signal to reduce the filtering error. It is worth noting that the convergence time of fixed-time control is predetermined, and there is no need to know the information of the system initial value. The final results show that the tracking error reach to the expected neighborhood near the origin in fixed-time. Eventually, the effectiveness of the proposed fixed-time control strategy is demonstrated by a simulation case."

Keywords Command filtered backstepping, fixed-time control, output feedback, uncertain nonlinear systems.

Article

Regular Papers

International Journal of Control, Automation and Systems 2023; 21(2): 429-439

Published online February 1, 2023 https://doi.org/10.1007/s12555-021-0999-7

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

Adaptive Fixed-time Output Feedback Tracking Control for Uncertain Nonlinear Systems

Shuchao Hou and Lin Zhao*

Qingdao University

Abstract

This article studies the fixed-time output feedback tracking control based on the command filtered backstepping method for nonlinear systems. The approximation technique of neural network is used to estimate uncertain dynamics. The fixed-time filter is introduced to overcome the problem of complexity explosion, and combined with the compensation signal to reduce the filtering error. It is worth noting that the convergence time of fixed-time control is predetermined, and there is no need to know the information of the system initial value. The final results show that the tracking error reach to the expected neighborhood near the origin in fixed-time. Eventually, the effectiveness of the proposed fixed-time control strategy is demonstrated by a simulation case."

Keywords: Command filtered backstepping, fixed-time control, output feedback, uncertain nonlinear systems.

IJCAS
June 2024

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

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