Reduced-order observer-based output feedback control of nonlinear time-delay systems with prescribed performance

Changchun Hua, Liuliu Zhang and Xinping Guan

International Journal of Systems Science, 2016, vol. 47, issue 6, 1384-1393

Abstract: This paper studies the problem of output feedback control for a class of nonlinear time-delay systems with prescribed performance. The system is in the form of triangular structure with unmodelled dynamics. First, we introduce a reduced-order observer to provide the estimate of the unmeasured states. Then, by setting a new condition with the performance function, we design the state transformation with prescribed performance control. By employing backstepping method, we construct the output feedback controller. It is proved that the resulting closed-loop system is asymptotically stable and both transient and steady-state performance of the output are preserved with the changing supply function idea. Finally, a simulation example is conducted to show the effectiveness of the main results.

Date: 2016
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DOI: 10.1080/00207721.2014.927937

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