This paper concentrates on analyzing the stability problems of aperiodic sampled-data systems with time delay. Based on Lyapunov theory. a new time-square-dependent two-side looped-functional (TTLF) is proposed. which can take full advantage of the second order terms with respect to time. https://lecoureures.shop/product-category/ski-de-fond-equipement-batons-pieces-de-rechange/