Robust Stabilization for Uncertain Nonlinear Systems Subject to Feedforward Growth Constraint

This paper investigates the robust stabilization problem of a class of uncertain nonlinear systems with input matching uncertainty under linear feedforward growth conditions. Smooth robust controllers are obtained by state feedback and output feedback, respectively. In order to deal with input match...

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Bibliographic Details
Published in:IEEE access 2021, Vol.9, p.89533-89538
Main Authors: Ju, Xinxu, Jia, Xianglei, Shao, Yiming
Format: Article
Language:English
Subjects:
Asymptotic stability
Circuit stability
Feedback control
Feedforward control
Feedforward systems
integral control
low-gain observer
Matching
matching uncertainty
Nonlinear systems
Output feedback
Robust control
Robust stabilization
State feedback
Uncertainty
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Summary:This paper investigates the robust stabilization problem of a class of uncertain nonlinear systems with input matching uncertainty under linear feedforward growth conditions. Smooth robust controllers are obtained by state feedback and output feedback, respectively. In order to deal with input matching uncertainty, extra dynamics are designed inspired by the integral control and disturbance estimation. The proposed controllers guarantee that the states of controlled systems asymptotically converge to zero and all closed-loop signals are globally bounded. Finally, simulation examples are given to illustrate the usefulness of the state-feedback and output-feedback controllers proposed.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2021.3090797