Abstract: An operational transfer path analysis methodology based on the Welch-FastICA algorithm is proposed in this paper. By optimizing the calculation process of the transmissibility and the decoupling method of input signals, it effectively addresses the issues of low accuracy in transmissibility calculation and signal crosstalk in traditional operational transfer path analysis. The improved method is applied to the vibration transfer path analysis of a certain electric vehicle drive motor. Compared with the traditional method, the root mean square error (RMSE) value of the improved method is reduced by 50%, while the correlation coefficient between datasets increased by 4%. These results verify the accuracy of the enhanced operational transfer path analysis method. Furthermore, the method successfully identifies the transfer paths contributing significantly to the drive motor vibration, thereby providing a theoretical basis for vibration reduction in electric vehicle drive motors.

Key words: operational transfer path; FastICA algorithm; path contributions; transmissibility

摘要： 文章提出了一种基于 Welch-FastICA 算法的工况传递路径分析方法，通过对传递率的 计算过程以及输入信号的解耦方法进行优化，有效解决了传统工况传递路径分析中传递率计 算精度低、信号间串扰的问题。将改进方法应用于某型电动汽车驱动电机振动传递路径分析 中，通过与传统方法进行比较，改进方法的均方根误差（RMSE）值减少了 50%；数据间相 关系数提升了 4%，验证了改进的工况传递路径分析方法的准确性，并成功辨识出对驱动电机 振动贡献较大的传递路径，为电动汽车驱动电机减振工作提供理论依据。

关键词: 工况传递路径；FastICA 算法；路径贡献；传递率