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Mathematical Problems in EngineeringVolume 2013 2013, Article ID 958958, 8 pages

Research ArticleCollege of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received 31 October 2012; Revised 27 December 2012; Accepted 27 December 2012

Academic Editor: Peng Shi

Copyright © 2013 Dezhi Xu et al. 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

We propose a terminal sliding mode control SMC law based on adaptive fuzzy-neural observer for nonaffine nonlinear uncertain system. First, a novel nonaffine nonlinear approximation algorithm is proposed for observer and controller design. Then, an adaptive fuzzy-neural observer is introduced to identify the simplified model and resolve the problem of the unavailability of the state variables. Moreover, based on the information of the adaptive observer, the terminal SMC law is designed. The Lyapunov synthesis approach is used to guarantee a global uniform ultimate boundedness property of the state estimation error and the asymptotic output tracking of the closed-loop control systems in spite of unknown uncertainties-disturbances, as well as all the other signals in the closed-loop system. Finally, using the designed terminal sliding mode controller, the simulation results on the dynamic model demonstrate the effectiveness of the proposed new control techniques.





Autor: Dezhi Xu, Bin Jiang, Moshu Qian, and Jing Zhao

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



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