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In this paper we deal with a class of uncertain time-varying nonlinear systems with a state delay.Under some assumptions,we construct some stabilizing continuous feedback,i.e.linear and nonlinear in the state,which can guarantee global uniform exponential stability and global uniform practical convergence of the considered system.The quadratic Lyapunov function for the nominal stable system is used as a Lyapunov candidate function for the global system.The results developed in this note are applicable to a class of dynamical systems with uncertain time-delay.Our result is illustrated by a numerical example.
In this paper we deal with a class of uncertain time-varying nonlinear systems with a state delay .Under some assumptions, we construct some stabilizing continuous feedback, ielinear and nonlinear in the state, which can guarantee global uniform exponential stability and global uniform practical convergence of the considered system. The quadratic Lyapunov function for the nominal stable system is used as a Lyapunov candidate function for the global system. The results developed in this note are applicable to a class of dynamical systems with uncertain time-delay. Your result is illustrated by a numerical example.