Robust Switched Interval Observer for the Energy Management System in Hybrid Vehicles

In this paper, the energy management system model of a hybrid vehicle (EMSHV) is elaborated. Based on this model, a switched interval observer with unknown input is proposed to estimate the output voltage of the DC bus. Sufficient conditions of the stability of such an observer are expressed in terms of LMI. A finite state machine is elaborated to control the EMSHV. To demonstrate the efficacy of the designed observation strategy, a large study, conducted by numerical simulations using Matlab/Simulink, is performed.