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High-gain adaptive λ-[lambda]-tracking for nonlinear systems

It is shown that a simple modification (introducing a dead zone in the adaptation law) of the known adaptive high-gain control strategy u(t) = -k(t)y(t), k(t) = ||y(t)||2 yields lambda-tracking in the presence of output corrupted noise for a large class of reference signals and a large class of multivariable...