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In this paper, we consider the resilient (non-fragile) controller design problem for polynomial nonlinear systems. The designed state feedback controller is capable of tolerating some level of controller gain variations. Based on the Lyapunov stability theorem and S-procedure, the synthesis condition will be formulated in polynomial but bilinear form of Lyapunov function and the controller gain jointly...
In this paper, we study adaptive control redesign problem of polynomial nonlinear systems with matching parametric uncertainties. By transforming the system into its corresponding error dynamics, we will develop an adaptive control scheme in attenuating the effect of the unknown parameters on the controlled output, which is composed of tracking errors and control efforts. To achieve better controlled...
In the paper, we will extend our recent results on output feedback control of LTI systems with actuator saturation to an important class of systems which have linear fractional parameter dependency. A nonlinear output feedback controller is first expressed in the form of a quasi-LPV system. Conditions under which the closed-loop system is locally asymptotically stable are then established in terms...
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