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In this paper, a terminal sliding mode control based on fuzzy disturbance observer scheme is proposed. For a nonlinear system, the disturbance that can not be directly measured is estimated using a fuzzy disturbance observer. Considering both the terminal sliding mode surface and the observer error, a novel adaptive law for the fuzzy disturbance observer is presented. Based on the output of the fuzzy...
The unmanned helicopter exhibits a complex and nonlinear dynamic behavior and open-loop unstable. This paper describes a attitude control method based on adaptive output feedback for an unmanned helicopter. First, it is assumed that the controlled system satisfies the output feedback linearization conditions. Second, the approximate model of the system is considered as the diffeomorphism of the system...
The problem of feedback stabilization for a class of switched nonlinear systems is considered using polynomial Lyapunov function, and two methods are presented based on sum of square decomposition. The first is direct method and feedback controllers can be obtained by solving feasibility problem of sum of square program. The second method is iterative method and feedback controllers can be obtained...
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