Model Predictive Control of Engine Start-up for Compound Power-split Hybrid Powertrain

doi:10.3901/JME.2020.22.201

Abstract

Abstract: When the compound power split hybrid system transitions from pure electric mode to hybrid mode, the engine always starts.However, because the engine is always connected to the driveline during start-up process, its low-speed reciprocating pulsation resistance torque has a direct impact on the driving smoothness of the vehicle. If improperly controlled, it often causes a large longitudinal jerk of the vehicle. For the engine start-up process of the compound power-split hybrid system, the power-split hybrid powertrain model and the engine resistance torque model are established based on the Matlab/Simulink platform. An engine start-up optimization mode predictive control strategy is proposed and the motor torque is calculated online to track the optimal engine speed curve and compensate for output torque fluctuation. The offline simulation and hardware-in-the-loop test results show that the proposed model predictive speed tracking control strategy can not only achieve rapid engine start,but also smoothly complete the mode transition. Besides, it limits the vehicle's longitudinal jerk within 11.0 m/s³ and has a good robust suppression on vehicle parameter perturbation.

Key words: engine start, model predictive control, power-split system, mode transition

CLC Number:

U461

ZHAO Zhiguo, FU Jing, JIANG Lanxing, FAN Jiaqi. Model Predictive Control of Engine Start-up for Compound Power-split Hybrid Powertrain[J]. Journal of Mechanical Engineering, 2020, 56(22): 201-209.

References

[1] 赵治国,代显军,王晨,等. 复合功率分流混合电动轿车驱动模式切换的协调控制[J]. 汽车工程,2015,37(3):260-265,259. ZHAO Zhiguo,DAI Xianjun,WANG Chen,et al. Coordinated control of driving mode switching of com-pound power-split hybrid electric car[J]. Automotive Engineering,2015,37(3):260-265,259.
[2] 杨南南. 基于历史数据的行星混联式客车在线优化控制策略[D]. 长春:吉林大学,2018. YANG Nannan. Historical data based online optimal control strategy for power-split hybrid electric bus[D]. Changchun:Jilin University,2018.
[3] 戴宇童. 双行星混联式客车的能量管理与模式切换协调控制研究[D]. 长春:吉林大学,2018. DAI Yutong. Study on energy management strategy and mode transition control for a dual planetary hybrid electric bus[D]. Changchun:Jilin University,2018.
[4] ZHU F,CHEN L,YIN C,et al. Dynamic modelling and systematic control during the mode transition for a multi-mode hybrid electric vehicle[J]. Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering,2013,227(7):1007-1023.
[5] CHEN J S,HWANG H Y. Engine automatic start-stop dynamic analysis and vibration reduction for a two-mode hybrid vehicle[J]. Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering,2013,227(9):1303-1312.
[6] HWANG H Y. Minimizing seat track vibration that is caused by the automatic start/stop of an engine in a power-split hybrid electric vehicle[J]. Journal of Vibra-tion & Acoustics,2013,135:061007-1.
[7] 王晨,王博. 深度混合动力系统发动机起动控制研究[J]. 汽车工程,2016,38(5):545-552. WANG Chen,WANG Bo. A study on engine start control in a full hybrid electric vehicle[J]. Automotive Engineering,2016,38(5):545-552.
[8] WANG C,ZHAO Z,ZHANG T,et al. Mode transition coordinated control for a compound power-split hybrid car[J]. Mechanical Systems & Signal Processing,2017,87:192-205.
[9] ZUO Y H,XIANG C L,YAN Q D,et al. Engine start control strategy research for parallel-series hybrid electrical vehicles[C]//Intelligent Control and Automation IEEE,2010:2097-2102.
[10] LIU D,ZHANG J,ZHANG D,et al. Experimental and numerical analysis of the seat track vibrations caused by engine starts in a power-split hybrid electric vehicle[J]. Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering,2017,231(3):395-404.
[11] ZHUANG W,KUM D,PENG H,et al. Optimal engine starts of an input-split hybrid electric vehicle[J]. SAE International Journal of Alternative Powertrains,2015,4(2):343-351.
[12] ZENG X,YANG N,WANG J,et al. Predictive-model-based dynamic coordination control strategy for power-split hybrid electric bus[J]. Mechanical Systems & Signal Processing,2015,60-61:785-798.
[13] XIANG C,ZHANG D,ZHENG H,et al. A novel nonlinear optimal control approach for the dynamic process of a hybrid electric vehicle equipped with elec-tromechanical transmission[J]. Mathematical Problems in Engineering,2015.
[14] 王晨,赵治国,张彤,等. 复合功率分流式E-CVT结构优化及验证[J]. 中国公路学报,2015,28(3):117-126. WANG Chen,ZHAO Zhiguo,ZHANG Tong,et al. Structure optimization and its validation for compound power-split E-CVT[J]. China Journal of Highway and Transport,2015,28(3):117-126.
[15] 赵治国,王晨,张彤,等. 复合功率分流变速器的设计与验证[J]. 汽车工程,2015,37(4):407-415,390. ZHAO Zhiguo,WANG Chen,ZHANG Tong,et al. Design and validation of a compound power-split tran-smission[J]. Automotive Engineering,2015,37(4):407-415,390.
[16] 赵治国,蒋蓝星,李蒙娜,等. 基于参考模型的复合功率分流系统模式切换中的转矩协调控制[J]. 汽车工程,2018,40(10):1132-1138,1165. ZHAO Zhiguo,JIANG Lanxing,LI Mengna,et al. Torque coordinated control during mode switching of a compound power-split hybrid system based on reference model[J]. Automotive Engineering,2018,40(10):1132-1138,1165.
[17] ZHAO Z,JIANG L,WANG C,et al. Engine start-up optimal control for a compound power-split hybrid pow-ertrain[J]. Mechanical Systems & Signal Processing,2019,120:365-377.
[18] BENDORD H L,LEISING M B. The lever analogy:A new tool in transmission analysis[R]. SAE,810102,1981.
[19] 李文华. 动力定位系统模型预测控制与失效移位研究[D]. 大连:大连海事大学,2016. LI Wenhua. Model predictive control and loss of position detection of dynamic positioning systems[D]. Dalian:Dalian Maritime University,2016.
[20] 刘袁龙. 协作式分布式模型预测控制算法通信策略研究[D]. 杭州:浙江大学,2017. LIU Yuanlong. Research on communication strategy of cooperative distributed model predictive control algori-thm[D]. Hangzhou:Zhejiang University,2017.
[21] 张浪文. 网络信息模式下分布式协调模型预测控制研究[D]. 上海:上海交通大学,2015. ZHANG Langwen. Study on networked cooperative distributed model predictive control[D]. Shanghai:Shanghai Jiao Tong University,2015.
[22] BISHOP R H. Model-based predictive control[M]. Boca Raton:CRC Press,2003.