汽车工程 ›› 2022, Vol. 44 ›› Issue (12): 1866-1876.doi: 10.19562/j.chinasae.qcgc.2022.12.008

所属专题: 新能源汽车技术-电驱动&能量管理2022年

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基于时变底盘构型的混动车辆能量管理研究

李军求(),刘吉威,朱超峰   

  1. 北京理工大学电动车辆实验室,北京  100080
  • 收稿日期:2022-05-24 修回日期:2022-07-03 出版日期:2022-12-25 发布日期:2022-12-22
  • 通讯作者: 李军求 E-mail:lijunqiu@bit.edu.cn
  • 基金资助:
    国家自然科学基金(52072037)

Research on Energy Management of Hybrid Electric Vehicle Based on Time-Varying Chassis Configuration

Junqiu Li(),Jiwei Liu,Chaofeng Zhu   

  1. National Engineering Laboratory for Electric Vehicles,Beijing Institute of Technology,Beijing  100080
  • Received:2022-05-24 Revised:2022-07-03 Online:2022-12-25 Published:2022-12-22
  • Contact: Junqiu Li E-mail:lijunqiu@bit.edu.cn

摘要:

本文旨在依托实车试验数据,对混合动力分布式驱动重型车辆的时变构型能量管理策略进行研究。首先,依据实车试验数据采用动态规划算法求得能耗最优底盘构型,并通过训练长短时记忆(LSTM)神经网络完成3类典型场景下的构型优化;接着,基于规则判断提出RULE_LSTM算法,其匹配准确率在全局工况下比LSTM神经网络能耗最优构型提高11.76%,构型切换频繁程度降低了33.3%;然后,基于交通流完成长尺度工况信息预测,实现最优底盘构型匹配和参考SOC轨迹生成,基于径向基神经网络生成短尺度工况预测序列供给后续算法输入;最后,通过采用时变构型实现控制变量优化,同时引入强转速变化率约束和SOC参考轨迹引导,实现引导型多APU预测能量管理策略。结果表明,上述措施使燃油消耗分别降低了10.60%、3.95%、2.06%。

关键词: 混合动力分布式驱动重型车辆, 能耗优化, 底盘构型, 能量管理策略

Abstract:

This paper aims to study the time-varying configuration energy management strategy for hybrid distributed drive heavy vehicles based on real vehicle test data. Firstly, based on the real vehicle test data and by using the dynamic programming algorithm, the chassis configuration with optimal energy consumption is found, and the long short-term memory (LSTM) neural network is trained to complete the configuration optimization in three typical scenes. Then, the RULE_LSTM algorithm is proposed based on rule judgment. Its matching accuracy is 11.76% higher than that using LSTM network configuration with optimal energy consumption, and its frequency of configuration switching is reduced by 33.3%. Next, based on traffic flow the prediction on long-scale operating condition information is completed and the optimal chassis configuration matching and reference SOC trajectory generation are fulfilled. Based on radial basis function neural network, a short-scale operating condition prediction sequence is generated as the input of the subsequent algorithm. Finally, time-varying configuration is adopted to optimize the control variables, meanwhile the strong speed change rate constraint and SOC reference trajectory guidance are also introduced to implement the guided multi-APU predictive energy management strategy. The results show that with above-mentioned measures taken, the fuel consumption is reduced by 10.60%, 3.95%, and 2.06% respectively.

Key words: hybrid distributed drive heavy vehicles, energy consumption optimization, chassis configuration, energy management strategy