Modal Analysis Method of Spindle System Based on Cross Power Spectrum Function of Impulse Excitation Response Signals
A cross-power spectrum and response signal technology, applied in the field of operational modal analysis, can solve problems such as poor error control, slow calculation speed, and low test efficiency, and achieve good error control, reduce equipment requirements, and reduce test costs.
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[0026] The present invention will be further described below in conjunction with the accompanying drawings.
[0027] refer to Figure 1 to Figure 6 , a method for analyzing the operating mode of the spindle system based on the cross power spectrum function of the impulse excitation response signal, comprising the following steps:
[0028] 1) Select an excitation point on the tool handle of the spindle system, and use a steel hammer to perform pulse excitation on the spindle system at the selected excitation point;
[0029] Select the response point that is closer to the excitation point and has a larger response signal amplitude as the reference point;
[0030] Response measuring points are arranged at the reference point and each key geometric model node reflecting the main shaft mode shape;
[0031] 2) collecting the response signals generated by the reference point and the response point after the pulse excitation;
[0032] 3) Perform band-pass filtering on the collected...
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