Adaptive Decentralized Asymptotic Tracking Control for Large-Scale Nonlinear Systems with Unknown Strong Interconnections
IEEE/CAA Journal of Automatica Sinica(2022)
Abstract
An adaptive decentralized asymptotic tracking control scheme is developed in this paper for a class of large-scale nonlinear systems with unknown strong interconnections,unknown time-varying parameters, and disturbances. First, by employing the intrinsic properties of Gaussian functions for the interconnection terms for the first time, all extra signals in the framework of decentralized control are filtered out, thereby removing all additional assumptions imposed on the interconnections, such as upper bounding functions and matching conditions.Second, by introducing two integral bounded functions,asymptotic tracking control is realized. Moreover, the nonlinear filters with the compensation terms are introduced to circumvent the issue of "explosion of complexity". It is shown that all the closed-loop signals are bounded and the tracking errors converge to zero asymptotically. In the end, a simulation example is carried out to demonstrate the effectiveness of the proposed approach.
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Key words
Adaptive decentralized control,asymptotic tracking control,large-scale nonlinear systems,unknown strong interconnections
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