Switched robust control of regenerative braking of electric vehicles

The robust control of regenerative braking of electric vehicles is presented based on the switched system theory in this paper. The continuous state variables and discrete-event state variables included in the regenerative braking system are determined by analyzing the vehicle braking process. And after considering a certain parameter perturbation of electrical components, input voltage or current and also the impact of automotive load variation, mechanical size error and usage wear, the regenerative braking is described as a class of parameter uncertain switched system with external disturbance. Then the model of regenerative braking is constructed. Its stability is analyzed and the switching control law is researched by using the Lyapunov function method. Simulation results show that the switching control of regenerative braking is stable, robust and with H∞ disturbance attenuation level γ.