Novel stabilization technique for the H∞ control of systems with time-varying input delay

This paper addresses H
_∞
control strategies for time-delay systems with input delay and its derivative varying within intervals. With the development of a new Lyapunov-Krasovskii functional, we propose a new performance criterion which combines state-of-the-art stability techniques with an improved piecewise analysis method. For the H
_∞
control design, we state a new stabilization technique based on the use of the Simulated Annealing (SA) algorithm. We also derive traditional stabilization methods: the use of predefined scalars and a modified cone complementarity linearization algorithm, in order to compare their efficiency with the proposed control design technique. The advantages of our H
_∞
performance and control criteria are also highlighted with numerical examples, and an illustrative example shows the effectiveness of the new control design technique using SA algorithm.