Notes to Robust Stabilization of a Class of Time-delay Nonlinear Systems

In this paper, we point out an unsolved problem in the constructing procedures of the proof in theorem 1 of (Sing Kiong Nguang, 2000) and also to inappropriate conditions C2) and C3). A counterexample is given which satisfies the settings of the paper (Sing Kiong Nguang, 2000) to illustrate the error of C2). For a second-order nonlinear time-delay system, we give a solving method for the unsolved problem which can obtain the local asymptotical stability of the system. A simulation example is also given to show the feasibility and efficiency of the method