Abstract
This paper investigates the problem of robust output feedback control for a class of time-delay nonlinear systems with unknown continuous time varying output function. Unlike the previous studies, the considered systems allow the presence of dead-zone nonlinearities, continuous disturbances and time-varying delays. A new robust control scheme is constructed by introducing coordinate transformations that draws the dead-zone characteristic as well as modifying a double-domination method cooperating with integral Lyapunov functions. A combined system is established to perform a one-step mechanism for constructing a continuous controller which guarantees that all closed-loop signals are ultimately uniform bounded. The proposed scheme is finally applied to a two-stage chemical reactor system with dead-zone input and external disturbances to illustrate the effectiveness and performances.
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Funding
This work is supported in part by National Natural Science Foundation of China under Grants 62173208 and 61773237, Taishan Scholar Project of Shandong Province of China under Grant tsqn202103061, Shandong Qingchuang Science and Technology Program of Universities under Grant 2019KJN036, Zhejiang Provincial Natural Science Foundation of China under Grant LZ21E050002, and the Ministry of Science and Technology (MOST), Taiwan, under Grant MOST 110-2221-E-006-173-.
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Sun, ZY., Zhang, K., Chen, CC. et al. Robust output feedback control of time-delay nonlinear systems with dead-zone input and application to chemical reactor system. Nonlinear Dyn 109, 1617–1627 (2022). https://doi.org/10.1007/s11071-022-07506-3
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DOI: https://doi.org/10.1007/s11071-022-07506-3