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Abstract
This paper addresses the adaptive finite-time tracking problem for nonlinear sandwich systems with dead-zone nonlinearity and full state constraints. The existence of the non-smooth dead-zone nonlinearity between the subsystems of the sandwich system makes the controller design as a challenging task. In this paper, a novel adaptive backstepping controller is proposed by employing the finite-time stability theorem and based on the barrier Lyapunov functions and finite-time command filters. The proposed controller guarantees the output tracking of the specified time-varying reference signal with the sufficiently small bounded tracking error in a finite-time. Moreover, all states of the controlled system are confined to predefined compact sets. To verify the theoretical achievements and show the applicability of the proposed method, simulation results are provided for both numerical and practical examples.
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No potential conflict of interest was reported by the author(s).
Additional information
Notes on contributors
Meysam Azhdari
Meysam Azhdari received the B.Sc. degree in Electronic Engineering from the Salman Farsi University of Kazerun in 2014. He received M.Sc. degree in Control Engineering from Shiraz University of Technology in 2019. He is now a Ph.D. student in Shiraz University of Technology. His research interests include Robust and nonlinear control. Currently, he is working on robust control of nonlinear sandwich systems.
Tahereh Binazadeh
Tahereh Binazadeh received her B.Sc. and M.Sc. degrees from Shiraz University, and Ph.D. degree from University of Tehran all in Control Engineering. She is now Associate professor in Shiraz university of technology. Her research interests includes nonlinear, robust and optimal control.