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A modal analysis method for spindle system operation based on multi-point pulse excitation

A technology of pulse excitation and modal analysis, which is applied in the testing of machines/structural components, measuring devices, vibration testing, etc., can solve the problems of low test efficiency, slow calculation speed, poor error control, etc., to reduce equipment requirements, improve Error control, high precision effect

Active Publication Date: 2016-08-24
杭州肯上信息科技有限公司
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Problems solved by technology

[0005] In order to overcome the disadvantages of slow calculation speed, low accuracy, poor error control, and low test efficiency of the existing spindle system modal analysis method, the present invention provides a fast calculation, high accuracy, and better The modal analysis method of the spindle system based on multi-point pulse excitation can reduce the test intensity and time, and greatly improve the test efficiency.

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  • A modal analysis method for spindle system operation based on multi-point pulse excitation
  • A modal analysis method for spindle system operation based on multi-point pulse excitation
  • A modal analysis method for spindle system operation based on multi-point pulse excitation

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] refer to Figure 1 to Figure 5 , a modal analysis method for spindle system operation based on multi-point pulse excitation, including the following steps:

[0026] 1) Select excitation points on the tool, tool handle and spindle of the spindle system, and use the steel hammer to perform pulse excitation on the spindle at the selected excitation points;

[0027] Select the response point that is closer to the excitation point and has a larger response signal amplitude as the reference point;

[0028] Response measuring points are arranged at the reference point and each key geometric model node reflecting the main shaft mode shape;

[0029] 2) collecting the response signal generated by the reference point and the response measuring point after the pulse excitation;

[0030] 3) Band-pass filtering is performed on the collected signal, and the pass-band is the...

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Abstract

A method for analyzing the operating mode of a spindle system based on multi-point pulse excitation, including multi-point pulse excitation input, generating broadband excitation to the CNC machine tool spindle system, reasonably selecting reference points and response points, and analyzing the reference points under multi-point pulse excitation Acquisition of the vibration acceleration signal data at the response point, calculating the cross-correlation function, constructing the matrix equation of the cross-correlation function, finding the poles of the system, identifying the damping ratio and mode shape, and performing modal verification and analysis to obtain the spindle system mode state parameters. The invention provides a multi-point pulse excitation-based spindle system operating mode analysis method that can realize fast calculation, has high accuracy, has better error control, can reduce test intensity and time, and greatly improves test efficiency.

Description

technical field [0001] The invention relates to the technical field of operation mode analysis, in particular to an analysis method for the operation mode of a spindle system. Background technique [0002] The dynamic characteristics of the spindle system have a direct impact on the machining accuracy and cutting efficiency of the machine tool. Accurately mastering the modal parameters of the spindle system including tool-toolholder-spindle is an important basis for stability prediction and processing parameter optimization. Usually, the excitation is applied at the tip of the tool and the response is picked up to obtain the frequency response function of the tip of the tool, and then the modal parameters of the system are obtained by the experimental modal analysis. [0003] However, due to the constant replacement of the tool, when the structure of the spindle system changes, the test needs to be re-tested, which increases the test time. The operational modal analysis met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02
Inventor 王扬渝文东辉蔡东海陈恒
Owner 杭州肯上信息科技有限公司
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