Disturbance Rejection Using the Combination of Equivalent-Input-Disturbance and Model-Predictive-Control Methods

This paper presents a new equivalent-input-disturbance (EID) approach that is the combination of the EID approach and model-predictive-control (MPC) method. The EID approach estimates the influence of a disturbance and uses it to reject the disturbance. Thus, the amplitude of the control input can be beyond the limitation if the original disturbance is large. To solve this problem, this paper combines the EID approach and the MPC method. The MPC method adjusts the amplitude of an estimated EID during a large disturbance. A numerical example uses a structural model and an earthquake. The results of it verify the validity of our method and the presented method has a better control performance than the previous EID approach. Furthermore, the MPC method adjusts the control input lest it is beyond the limitation.