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This brief is concerned with H_ filter design for systems with time-varying interval delay (i. e. , the time delay is varying in an interval). An appropriate type of Lyapunov functionals is proposed to investigate the delay-dependent H_ filter design problem. Improved delay-dependent results are presented by taking into account the interval range. Finally, a numerical example is given to demonstrate the effectiveness and the benefits of the proposed method.
He et al. (Wed,) studied this question.