Robust Hybrid Control for Energy Recovery for Main and Auxiliary Sources of Electric Vehicle

A novel energy recovery system for the main and auxiliary sources of electric vehicle (EV) has been developed to improve the energy efficiency. During the regenerative braking of EV, the recovered mechanical energy is stored at the main source and the auxiliary source at the same time. The mathematic model of the energy recovery system is derived step by step. Combing the merit and the defect of the H₂ optimal control and the H_alpha robust control, the robust hybrid controller is designed to guarantee both the system performance and the robust stability. Simulated results showed that the proposed controller is endowed with high dynamic and steady performance and the novel energy recovery system is feasible and effective. More energy is recovered than the traditional energy recovery system, and the driving range of EV could be increased.