The Razumikhin-type approach is introduced to solve the output-feedback stabilization problem for a class of nonlinear systems with time-varying delay. By using the Razumikhin-type theorem and the backstepping design method, effective observers and suitable Lyapunov functions, an output-feedback controller is constructed to ensure the origin of a closed-loop system globally asymptotically stable. The limitations on the derivative of delay can be completely removed, which is the common assumption of nonlinear systems with time-varying delay. A simulation example illustrates the effectiveness of the output-feedback controller.
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