基于速度和加速度概率分布的电动汽车能耗计算模型

EV calculation model of energy consumption based on velocity and acceleration distribution

根据随机过程遍历性理论以及电动汽车能耗在速度时间序列上的时间平均与在VA(速度-加速度)相空间的统计平均之间的等价关系,建立了基于VA概率分布的电动汽车能耗计算模型。相比以往的利用速度时间序列计算能耗,基于VA概率分布能耗模型的计算效率得到了很大提高,能够满足电动汽车道路能耗实时计算的要求。通过道路试验能耗与基于VA概率分布能耗模型仿真计算结果的对比,表明模型具有较高的计算精度。

According to the theory of ergodic property of stochastic process and the equivalence relation between time average of the energy consumption in velocity time series and statistical average of energy consumption in Velocity-and-Acceleration （VA） phase space, a model, which can calculate EV energy consumption based on VA probability distribution, was built up. Compared to the energy consumption model based on velocity time series, the efficiency of energy consumption calculation of the new model is greatly improved, meeting the demand of real-time calculation of EV energy consumption in urban route. The calculation accuracy of the model is validated by comparative tests between EV trial on the route of Changchun city and energy consumption simulation using the proposed model.