Orthogonal design based double optimization for HEV transmission system

Because a hybrid electric vehicle (HEV) is the multi-energy system with a complicated control strategy, there are many factors which increase the optimization difficulty. In this paper, the orthogonal design method for HEV transmission optimization is presented. The main factors influenced the optimization object directly are found and optimized through orthogonal design method to reduce optimization variables, after which the optimized variables are second optimized through optimization function by using Simulink models in ADVISOR. This method can reduce test times; the optimization period and improve the fuel economy on the basis of meeting the dynamic requirements. Through simulation, SOC change is rational; fuel economy and dynamic performance turn out to be as expected.