Adaptive event-triggered tracking using nonlinear disturbance observer of arbitrarily switched uncertain nonlinear systems in pure-feedback form

2021 ◽  
Vol 407 ◽  
pp. 126335
Author(s):  
Dong Min Jeong ◽  
Sung Jin Yoo
Keyword(s):  
Nonlinear Systems ◽  
Disturbance Observer ◽  
Uncertain Nonlinear Systems ◽  
Feedback Form ◽  
Nonlinear Disturbance Observer ◽  
Nonlinear Disturbance ◽  
Event Triggered

scholarly journals Robust Control of Uncertain Nonlinear Systems: A Nonlinear DOBC Approach

2016 ◽  
Vol 138 (7) ◽  
Author(s):  
Wen-Hua Chen ◽  
Jun Yang ◽  
Zhenhua Zhao
Keyword(s):  
Robust Control ◽  
Nonlinear Systems ◽  
Disturbance Observer ◽  
External Disturbance ◽  
Uncertain Nonlinear Systems ◽  
Nonlinear Controller ◽  
Nonlinear Disturbance Observer ◽  
Spring System ◽  
Mass Spring ◽  
Distinct Features

This paper advocates disturbance observer-based control (DOBC) for uncertain nonlinear systems. Within this framework, a nonlinear controller is designed based on the nominal model in the absence of disturbance and uncertainty where the main design specifications are to stabilize the system and achieve good tracking performance. Then, a nonlinear disturbance observer is designed to not only estimate external disturbance but also system uncertainty/unmodeled dynamics. With described uncertainty, rigorous stability analysis of the closed-loop system under the composite controller is established in this paper. Finally, the robust control problems of a missile roll stabilization and a mass spring system are addressed to illustrative the distinct features of the nonlinear DOBC approach.

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