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A distributed controller approach for delay-independent stability of networked control systems. (English) Zbl 1185.93120
Summary: This article introduces a novel distributed controller approach for networked control systems to achieve finite gain \({\mathcal L}_2\) stability independent of constant time delay. The proposed approach represents a generalization of the well-known scattering transformation which applies for passive systems only. The main results of this article are (a) a sufficient stability condition for general multi-input-multi-output input-feedforward-output-feedback-passive nonlinear systems and (b) a necessary and sufficient stability condition for linear time-invariant single-input-single-output systems. The performance advantages of the proposed approach are reduced sensitivity to time delay and improved steady state error compared to alternative known delay-independent small gain type approaches. Simulations validate the proposed approach.

MSC:
93D25 Input-output approaches in control theory
93A15 Large-scale systems
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