LAUSR

This study investigates the problem of delay-dependent stability and stabilisation of uncertain delta operator systems with time-varying delay. A new model transformation is proposed using a three-term approximation, which has a smaller approximation error than the existing methods based on one or two terms. On the basis of scaled small gain theorem (scaled small gain) and an appropriate Lyapunov–Krasovskii functional, a new stability criterion is proposed in terms of linear matrix inequalities. Finally, numerical examples are presented to illustrate the effectiveness of the proposed method.