Composite hierarchical elegant anti-disturbance control of nonlinear system with multi-source disturbance
A type of composite hierarchical elegant anti-disturbance control method is proposed for a class of nonlinear continuous systems with multi-source disturbances,and the technique aims to effectively deal with matched disturbances and external disturbances presented in the system.Firstly,matched disturbance is mo-deled by a generalized disturbance exogenous system to broaden the description range of disturbance.Then,a nonlinear disturbance observer is designed using the LMI regional pole placement and D-stability theory to es-timate the matched disturbance.And feed-forward control is applied to compensate and reduce the effect of the matched disturbance in the system.A passive H∞control strategy is used to attenuate external disturbance in the system.Lastly,the sufficient condition for the existence of a composite hierarchical elegant anti-distur-bance controller is obtained based on the Lyapunov stability theory and linear matrix inequality method.The simulation results show that the proposed method can ensure the stability and strong robustness of the system.
multi-source disturbance nonlinear systemsmatched disturbancedisturbance observerelegant anti-disturbance control
万方数据
维普
