Decentralized Variable Gain Robust Controllers for a Class of Uncertain Large-Scale Interconnected Systems

Shunya Nagai and Hidetoshi Oya


Decentralized control, variable gain robust control, uncertain large-scale interconnected systems, parameter adjustment law, LMIs


In this paper, we propose a decentralized variable gain robust controller which achieves not only robust stability but also satisfactory transient performance for class of uncertain large-scale interconnected systems. For the uncertain large-scale interconnected system, uncertainties and interactions satisfy the matching condition. The proposed decentralized robust control system has a fixed feedback gain controller and a variable one tuned by a parameter adjustment law. In this paper, it is shown that sufficient conditions for the existence of the proposed decentralized variable gain robust control system are given in terms of LMIs. At last, simple illustrative examples are shown.

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