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Decentralised adaptive control for large-scale non-linear systems with unknown high-frequency-gain signs

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3 Author(s)
Ye, X. ; Sch. of Mech. & Electr. Eng., China Inst. of Metrol., Hangzhou, China ; Chen, P. ; Li, D.

For the first time, a decentralised adaptive control scheme for large-scale non-linear systems is proposed, which does not require a priori knowledge of subsystems' high-frequency-gain signs. In each local adaptive controller, a Nussbaum-type function is incorporated, and its argument is tuned online via an appropriately designed update law. The stability of the closed-loop system is analysed. It is shown that all signals in the closed-loop system are bounded, and that asymptotic regulation is achieved.

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Control Theory and Applications, IEE Proceedings -  (Volume:152 ,  Issue: 4 )