关键词: 动力总成悬置系统, 多工况, 运行模态, 参数识别

Abstract:

The vibration responses were measured on different working conditions, including starting, idling and revving up. The powertrain mounting system operational modal parameters were identified. The polyreference least squares complex frequency domain method(PRLSCF) technology was employed to obtain system working mode by the experiments. For the engine power source did not have zero mean and white noise characteristics, a variety of modal confidence indexes were applied in the model validation, and the relatively credible modal parameters were obtained. The test results show that operational modal parameters are relative to the operating conditions of the engine. For the mounting system with the heavy damping and close modal property, multiple operational modal tests can identify the modal parameters more accurately, which is consistent with the mounting component parameter design.

Key words: powertrain mounting system, multi work condition, operational mode, parameter identification