关键词: 混联式混合动力车辆, 发动机波动转矩, 主动振动控制, 陷波FxLMS算法

Abstract: The series-parallel hybrid powertrain combines the characteristics of series and parallel hybrid configurations, with the engine and motor connected through a power coupling mechanism that can provide power to the wheels independently or jointly, resulting in excellent fuel economy. However, the mechanical connection between the engine and transmission system in series-parallel hybrid vehicles often leads to poor NVH (Noise, Vibration, and Harshness) performance. To address this issue, this paper proposes an active vibration control strategy. Initially, the paper introduces the configuration and various operation modes of the series-parallel hybrid vehicle, establishes a torsional dynamics model and an engine fluctuating torque model, and analyzes the relationship between system torsional vibration response frequency and engine speed. Subsequently, an adaptive multi-channel active vibration control algorithm based on the notch FxLMS algorithm is proposed, utilizing motors as actuators to achieve torsional vibration compensation at target points through adaptive adjustment of the weight matrix. Furthermore, to enhance control accuracy, this paper conducts offline identification of multiple secondary paths in the series-parallel system using FIR filters. Finally, simulation results demonstrate that the proposed active vibration control strategy is effective and stable, improving vehicle ride comfort, extending component life, and enhancing overall vehicle performance.

Key words: series-parallel hybrid electric vehicle, engine fluctuating torque, active vibration control, notch FxLMS algorithm