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Received:December 25, 2011Revised:April 26, 2012 |
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Feedback stabilization for a class of discontinuous systems driven by integrator |
Jiangyan ZHANG,Tielong SHEN |
(Department of Engineering and Applied Sciences, Sophia University; College of Electromechanical & Information Engineering, Dalian Nationalities University) |
Abstract: |
This paper investigates the feedback stabilization problem for a class of discontinuous systems which is characterized by Filippov differential inclusion. Lyapunov-based backstepping design method is generalized with nonsmooth Lyapunov functions to solve the control problem. A set-valued time derivative is introduced first for nonsmooth function along discontinuous vector fields, which enables us to perform Lyapunov-based design with nondifferentiable Lyapunov function. Conditions for designing a virtual control law which is shown nondifferentiable in general in the recursive design problem are proposed. Finally, as a special case, piecewise linear system is discussed to demonstrate the application of the presented design approach. |
Key words: Differential inclusion Discontinuous systems Backstepping Nonsmooth Lyapunov function |