中文摘要：

利用混合动力汽车能量动态规划进行管理可优化系统状态,降低油耗,但计算量大,仿真时间长。针对一种新型混合动力汽车结构,优化动态规划算法得到能量管理策略。通过对新型功率分流混合动力汽车进行建模分析,优化发动机模型,减少了控制变量数量,制定相应的状态转移规则,减少了仿真计算量。基于整车纯电动试验得到电池荷电状态与当量燃油消耗量的转化系数,建立了代价函数。利用Matlab仿真平台得到NEDC工况下混合动力汽车能量管理策略。结果表明,优化的动态规划方法可显著减少仿真计算量与时间,所得能量管理策略可显著提高整车燃油经济性。

英文摘要：

A novel power split hybrid vehicle model for energy management is established based on optimized dynamic programming algorithm. The engine model is optimized to decrease the quantity of control variables,and state transition rules are proposed to reduce the amount of simulation. Through pure electric experiments on vehicle,the conversion factor between battery state of charge and equivalent fuel consumption is applied in establishment of the cost function. The power management strategy of the hybrid system is obtained with Matlab simulation platform under NEDC conditions. The simulation results show that the simplified dynamic programming can shorten simulation time and the global optimized control strategy can improve the fuel economy.