Research on Mode Transition Control of Power-Split Hybrid Electric Vehicle Based on Fixed Time

Hongdang Zhang, Hongtu Yang, Fengjiao Zhang, Xuhui Liao and Yanyan Zuo ()
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Hongdang Zhang: Changzhou Vocational Institute of Mechatronic Technology, College of Transportation Engineering, Changzhou 213164, China
Hongtu Yang: Changzhou Vocational Institute of Mechatronic Technology, College of Transportation Engineering, Changzhou 213164, China
Fengjiao Zhang: Changzhou Vocational Institute of Mechatronic Technology, College of Transportation Engineering, Changzhou 213164, China
Xuhui Liao: Changzhou Vocational Institute of Mechatronic Technology, College of Transportation Engineering, Changzhou 213164, China
Yanyan Zuo: School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China

Energies, 2025, vol. 18, issue 16, 1-24

Abstract: In this paper, we address the problem of jerk and disturbance suppression during mode transitions in power-split hybrid electric vehicles. First, a transient switching model of the PS-HEV is developed. Next, the mechanisms underlying shock generation and the influence of disturbances on transition smoothness are analyzed. Based on this, a fixed-time dynamic coordinated control strategy is proposed, comprising a novel sliding mode control law and a fixed-time extended state observer. The proposed fixed-time sliding mode control law is independent of initial state values and ensures superior convergence performance. Meanwhile, the fixed-time extended state observer enables real-time estimation of external disturbances, thereby reducing the conservatism of the control law. Finally, simulation and hardware-in-the-loop results demonstrate that the proposed strategy markedly improves mode transition performance under various disturbance scenarios. This work provides a new perspective on hybrid mode transition control and effectively enhances transition smoothness.

Keywords: power-split hybrid electric vehicles; disturbance suppression; fixed-time sliding mode control; extended state observer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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