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l2-l reliable control for discrete time-delay systems with fractional uncertainties and saturated package losses

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3 Author(s)
Zhen'na Li ; Sch. of Inf. Sci. & Technol., Donghua Univ., Shanghai, China ; Huisheng Shu ; Xiu Kan

This study deals with the ℓ2-ℓ reliable control problem for a class of discrete time-delay systems. The considered system involves fractional uncertainties, saturated package losses and stochastic non-linearities as well as possible actuator failures. A sensor model is proposed to depict the phenomenon of saturated package losses which better reflect the reality in a networked environment. In addition, stochastic non-linearities with statistical characteristics cover several well-studied non-linear functions as special cases. The focus of this study is placed upon the design of a reliable controller such that the closed-loop system satisfies a prescribed noise attenuation level in an ℓ2-ℓ sense. By utilising stochastic analysis methods, some sufficient conditions are established to guarantee both the exponentially mean-square stability and the ℓ2-ℓ performance. Owing to the obtained conditions with a non-linear equality constraint, the cone complementary linearisation method is exploited to cast them into a convex optimisation problem, which can be readily solved by using standard numerical software. Finally, a simulation example is exploited to demonstrate the applicability of the proposed design approach.

Published in:

Control Theory & Applications, IET  (Volume:8 ,  Issue: 11 )