Robust exponential delay-dependent stability criteria for neutral systems with constant delay

In this paper, exponential stability criteria of linear neutral systems with/ without uncertainties are investigated. By applying a change of variable, the Leibniz-Newton formula, integral inequalities and Lyapunov-Krasovskii functionals without adding free matrices, improved exponential stability-delay dependent criteria of the systems are obtained in the form of linear matrix inequality (LMI). At the end, three numerical examples are given to indicate that the results presented in this research are effective and better than some criteria of previous works.