基于效率优化的混合动力车辆强化学习能量管理策略研究

Taking the power split hybrid electric vehicle as the object,this paper establishes the model for calculating the system comprehensive efficiency and proposes an efficiency optimization based energy management strategy with reinforcement learning. Firstly, the efficiency model of key components and the efficiency model of coupling mechanism are established. Based on the general structure of stepless speed regulation of composite transmission, the influence law of power splitting coefficient on the efficiency is analyzed, and the system comprehensive efficiency model is further constructed. Then with efficiency optimization as the goal, an energy management strategy based on reinforcement learning is proposed. Simulation comparisons are implemented, and the results show that the proposed strategy can achieve excellent fuel economy while maintaining battery SOC within a smaller fluctuation range. Finally, a test bench is built and the test results prove the correctness of the established efficiency model and the effectiveness of the proposed energy management strategy.