Title | ||
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Practical prescribed time tracking control over infinite time interval involving mismatched uncertainties and non-vanishing disturbances |
Abstract | ||
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Most existing prescribed time control methods are valid for finite time intervals rather than infinite time intervals, and can only achieve regulation under vanishing or no uncertainties/disturbances. In this work, a control method that achieves pre-assignable tracking precision within the prescribed time is presented for nonlinear systems in the presence of non-vanishing disturbances and mismatched uncertainties over the infinite time interval. More specifically, by introducing a novel time-varying constraining function, the original finite-time tracking control problem is converted into one with a deferred constraint on tracking error, then by stabilizing of which, the prescribed time tracking control problem is solved with the following appealing features: 1) both the settling time and the tracking accuracy can be explicitly specified in advance regardless of initial conditions and any design parameter; 2) the control gains and the control input remain bounded and continuous everywhere; 3) the system is allowed to operate continuously even after the prescribed time; and 4) the results are global in that pre-set tracking accuracy is ensured within the predefined time for states starting from anywhere within the physically possible domain. |
Year | DOI | Venue |
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2022 | 10.1016/j.automatica.2021.110050 | Automatica |
Keywords | DocType | Volume |
Prescribed time control,Practical tracking,Uncertain nonlinear systems,Robust adaptive control | Journal | 136 |
Issue | ISSN | Citations |
1 | 0005-1098 | 1 |
PageRank | References | Authors |
0.35 | 0 | 3 |
Name | Order | Citations | PageRank |
---|---|---|---|
Ye Cao | 1 | 20 | 1.92 |
Jianfu Cao | 2 | 2 | 1.03 |
Yong-Duan Song | 3 | 1949 | 108.61 |