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Engine Excitation Force Identification on the Basis of Discrete Spectrum Correction

机译：基于离散频谱校正的发动机激励力识别

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摘要

The interpolation method of discrete spectrum is applied to the engine excitation force identification. The frequency, amplitude, and phase of the vibration response of each measuring point on cylinder surface are obtained accurately based on the interpolation method. Combination with the inertia parameters and the dynamic properties of the mounts, the excitation force, and moment at the center of gravity of engine can be exactly retrieved. The nonlinear problem caused by the imprecise phase of the measurement points is avoided, and the identified method is simplified. Simulation results confirm the importance of the interpolation method on the accurate identification of the excitation force. Influences on the excitation force identification are analyzed quantitatively. The reasons causing the errors are analyzed and the avoidance methods are given too. Through the multi-rigid-body dynamics model simulation, the excitation force identification method is confirmed. Then, the proposed method is carried out on an engine.
机译：离散谱的插值方法应用于发动机激励力识别。基于插值法，可以精确地获取气缸表面上每个测量点的振动响应的频率，幅度和相位。结合惯性参数和安装座的动态特性，激振力以及发动机重心处的力矩，可以精确获取。避免了由测量点相位不精确引起的非线性问题，简化了识别方法。仿真结果证实了插值方法对准确识别激振力的重要性。定量分析了对励磁力识别的影响。分析了导致错误的原因，并给出了避免方法。通过多刚体动力学模型仿真，确定了激振力识别方法。然后，在发动机上执行所提出的方法。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第18期|175257.1-175257.11|共11页
  • 作者

    Xu Chuanyan; Cao Fengping;

  • 作者单位

    Shandong Jiaotong Univ, Sch Automot Engn, Jinan 250023, Peoples R China;

    Shandong Jiaotong Univ, Sch Automot Engn, Jinan 250023, Peoples R China;

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