基于补偿滑模控制的混合动力汽车协调控制*

doi:10.19562/j.chinasae.qcgc.2020.04.003

Abstract

Abstract: Considering the structural advantages of the hybrid electric car with planetary-gear-based compound power split system, the hybrid electric car with double-planetary-gear-based compound power split system has become the focus of research of various institutions. The process of switching from electric mode to hybrid drive mode involves the starting of the engine and the intervention of the engine torque. Due to the hysteresis of the torque transient response of the engine, there will be large fluctuation of the output torque of the power system during the switching process. In this paper, to reduce the fluctuation and the dynamic impact in the process of mode switching, a compensation sliding mode control method is proposed for the coordinated control of the hybrid electric car with double-planetary-gear-based compound power split system. Firstly, a dynamics model for the vehicle is built to analyze each mode of the switching process. Then, for the engine drag phase and the hybrid drive phase, the compensation control and the adaptive sliding mode control based on fixed boundary layer are used respectively, and the stability of sliding mode control is analyzed. Finally, the verification simulation is conducted on Matlab / Simulink software platform. The simulation results show that the compensation sliding mode coordinated control strategy can effectively reduce the torque fluctuation and impact in the process of switching from electric mode to hybrid drive mode

Key words: power-split hybrid electric car, mode switching, coordinated control, torque compensation, sliding mode control

Cai Yingfeng, Dou Lei, Chen Long, Shi Dehua, Wang Shaohua, Zhu Zhen. Research on Coordinated Control of Hybrid Electric VehicleBased on Compensation Sliding Mode Control[J].Automotive Engineering, 2020, 42(4): 431-438.

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Research on Coordinated Control of Hybrid Electric VehicleBased on Compensation Sliding Mode Control

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