考虑混合动力商用车部件基本的动态特性,在Matlab/Simulink中建立了整车前向仿真细化模型.应用动态规划理论获得整车燃油经济性的最优控制策略,包括能量分配和换挡控制策略.基于动态规划的最优控制策略,抽取出能够应用于实车控制的改进规则作为控制策略.采用重型车辆实际行驶工况的仿真结果表明,基于动态规划优化方法改进的整车控制策略可显著提高燃油经济性.%A feed-forward Simulink model for hybrid electric commercial vehicle is established, considering the basic dynamic features of its components. Dynamic programming (DP) theory is adopted to find the optimal control strategies for vehicle fuel economy including the strategy of power split between engine and motor and the shift control strategy. Improved control rules for vehicle control are extracted based on DP optimal control results and implemented as the control strategy. The results of simulation over the heavy-duty vehicle cycle from natural driving statistics demonstrate the potential of improved vehicle control strategy based on DP optimization technique in significantly enhancing fuel economy.
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