Multi-objective control strategy for parallel HEV using fuzzy logic

A fuzzy multi-objective control strategy is proposed for parallel hybrid electric vehicles(PHEV).By the concept of motor equivalent fuel consumption,the overall vehicle fuel economy and the corresponding emissions can be treated as the optimization objectives.Then a minimum average weighted deviation method is designed to find the Pareto optimal solution with considering the variations of objective preference in different district.The simulation on ADVISOR reveals that,compared with the rule based control strategy(RBCS),with the premise that there is no loss to power performance,the proposed fuzzy multi-objective control strategy(FMCS) not only improves fuel economy and emission level but also maintains battery SOC within its operation range more effectively.