2134/21958
Jun Yang
Jun
Yang
Zhengtao Ding
Zhengtao
Ding
Wen-Hua Chen
Wen-Hua
Chen
Shihua Li
Shihua
Li
Output-based disturbance rejection control for non-linear uncertain systems with unknown frequency disturbances using an observer backstepping approach
Loughborough University
2016
untagged
Mechanical Engineering
Engineering not elsewhere classified
2016-07-12 08:58:06
Journal contribution
https://repository.lboro.ac.uk/articles/journal_contribution/Output-based_disturbance_rejection_control_for_non-linear_uncertain_systems_with_unknown_frequency_disturbances_using_an_observer_backstepping_approach/9225848
This study is concerned with the output feedback control design for a class of non-linear uncertain systems subject to multiple sources of disturbances including model uncertainties, unknown constant disturbances, harmonic disturbances with unknown frequency and amplitude. The total disturbances and uncertainties are delicately represented by a compact exogenous model first. By incorporating the adaptive internal model principle, a set of dynamic estimators are developed for both state and disturbance observations. By means of observer backstepping technique, a composite output feedback controller is constructed based on the disturbance and state estimations. The stability of the closedloop system is rigorously established based on Lyapunov stability criterion. A missile roll stabilisation example is finally investigated to validate the effectiveness of the proposed control approach.