In order to get the excitation forces of the vehicle powertrain, a six-degree-of-freedom model of the powertrain mounting system is established. Two different identification methods are presented. Through the test of mount dynamic response, the powertrain excitations identified through these two methods are compared. The results show that the powertrain excitations identified through two methods are basically the same, since the mount accelerations at the body side are really small. The identified excitation is verified by comparing the deformation of torque strut. The robustness analysis of the mount acceleration phase affecting the identification results is also proposed. Improving the accuracy of phase in test input is helpful to improve the accuracy of identification results.

中文翻译：

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动力总成励磁力的辨识与鲁棒性分析

为了获得车辆动力总成的激励力，建立了动力总成安装系统的六自由度模型。提出了两种不同的识别方法。通过安装动态响应测试，比较了通过这两种方法确定的动力总成激励。结果表明，通过两种方法识别出的动力总成激励基本相同，因为车身侧的安装加速度确实很小。通过比较扭矩支柱的变形来验证识别出的激励。还提出了影响识别结果的安装加速阶段的鲁棒性分析。提高测试输入中相位的准确性有助于提高识别结果的准确性。