1. Robust adaptive control for uncertain nonlinear systems with odd rational powers, unmodeled dynamics, and non-triangular structure.
- Author
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Liu, Zhen-Guo, Sun, Wei, and Zhang, Weidong
- Subjects
ADAPTIVE fuzzy control ,NONLINEAR systems ,ADAPTIVE control systems ,UNCERTAIN systems ,ROBUST control ,PARAMETER estimation ,OFFSHORE structures ,MAXIMUM power point trackers - Abstract
Numerous approaches have been reported for different control problems of low-order triangular nonlinear systems. Nevertheless, it shows that the dynamic models of some practical plants are high-order nonlinear systems with odd rational powers. Besides, these systems constantly possess a non-triangular form and suffer from the impact of unmodeled dynamics. The related studies of such systems are very few and more challenging. This work concentrates on adaptive control issue of high-order nonlinear system with odd rational powers, unmodeled dynamics, and non-triangular structure. Based on the small-gain theorem, and by employing the adaptive technique, adding a power integrator method, and neural network method, we successfully construct a new adaptive controller, which greatly decreases the use of parameter estimations in the adaptive control of the considered system. An example highlights that the strategy regulates the studied systems well and performs satisfied system responses. • The robust adaptive control problem of uncertain nonlinear system is considered. • The system has odd powers, unmodeled dynamics, and non-triangular structure. • The work uses adaptive adding a power integrator and neural network method. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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