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Decentralized adaptive regulation with unknown high-frequency-gain signs

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1 Author(s)
Ye Xudong ; Dept. of Electr. Eng., Zhejiang Univ., Hangzhou, China

We propose for the first time a decentralized adaptive control scheme without requiring a priori information on subsystem high-frequency-gain signs. This is achieved by introducing Nussbaum-type functions in local adaptive controllers, and developing a new analysis approach which is quite different from the conventional one used in centralized adaptive control involving a Nussbaum-type function. With the help of integrator backstepping, the decentralized control scheme can also be applied to high-relative-degree systems. The results of this paper enlarge the class of uncertain large-scale systems for which decentralized adaptive control can be designed

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Automatic Control, IEEE Transactions on  (Volume:44 ,  Issue: 11 )