Synthesis of adaptive gain robust output feedback controllers for a class of lipschitz nonlinear systems with unknown upper bound of uncertainty

We propose a new adaptive gain robust output feedback controller for a class of the lipschitz nonlinear systems with unknown upper bound of uncertainty. the proposed adaptive gain robust output feedback controller is designed so as to reduce the effect of uncertainties and lipschitz nonlinearities. in this paper,we show that sufficient conditions for the existence of the proposed adaptive gain robust output feedback controller are reduced to lmi conditions. finally,the effectiveness of the proposed robust output feedback controller is demonstrated by numerical simulations. © 2012 hidetoshi oya and kojiro hagino.