Robust adaptive finite-time stabilization control for a class of nonlinear switched systems based on finite-time disturbance observer |
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| Authors: | Mohammad Javad Mirzaei Ehsan Aslmostafa Mostafa Asadollahi Mohammad Ali Badamchizadeh |
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| Institution: | 1. School of Mathematics and Statistics, Northeast Normal University, Changchun 130024, China;2. School of Mathematics and Physics, Guangxi University for Nationalities, Nanning 530006, China;1. State Key Laboratory of Synthetical Automation for Process Industries, Northeastern University, Shenyang, Liaoning 110004, China;2. College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning 110004, China;3. College of Automation, Chongqing University, Chongqing 400044, China;4. College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, Liaoning 110169, China |
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| Abstract: | The problem of adaptive global finite-time stabilization control for a class of nonlinear switched systems in the presence of external perturbations and arbitrary switchings has been addressed in this research study. The proposed scheme has been designed based on a finite-time estimation technique in which during the control procedure, unknown imposed perturbations are accurately estimated by means of the designed finite-time disturbance observer (FTDO). Due to the exact estimation of the external disturbances within a given finite time, the encountered complications and adversities from loss of information in the Lyapunov parameter estimation (LPE) methods have been solved which are caused by the persistent switchings in the system. Furthermore, a new solution for the problem of chattering phenomenon in nonlinear switched systems has been presented by utilizing the designed FTDO, which can counteract the malfunctioning responses of the system caused by external disturbances and unmodeled dynamics. In this paper, an acknowledged class of nonlinear switched systems has been taken into account which is in the general form of canonical structure. In addition, the established design strategy is formulated for the control of perturbed nonlinear switched systems with one and only input and assures that the system states through the finite-time convergence characteristic, reach the equilibrium point of origin. Finally, numerical simulations are carried out on a mass-spring-damper (MSD) dynamical system to indicate advantages and superior efficiency of the suggested method. |
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