Sliding mode control for diesel generator via disturbance observer

This paper develops a sliding mode controller via nonlinear disturbance observer for diesel generator system subject to matched and unmatched disturbances. The proposed controller is based upon a novel nonlinear disturbance observer structure which uses the concept of total disturbance estimation in order to estimate simultaneously the matched and the unmatched disturbances in the system. This estimation is incorporated then in a composite observer based controller where the Lyapunov based stability analysis is given. Simulations results illustrate the effectiveness of the proposed controller compared to the baseline sliding mode controller and shows its advantages in terms of disturbance rejection, chattering reduction and nominal performance recovery.