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Vibration frequency determination method and device, compressor system and readable storage medium

A vibration frequency and determination method technology, applied in the field of compressors, can solve the problems of poor system stability, unstable magnetic suspension bearing rotor suspension, affecting the stability of the magnetic suspension bearing control system, etc.

Pending Publication Date: 2022-03-01
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the magnetic suspension bearing control system, it is necessary to ensure that the control system does not include the force corresponding to the bending mode frequency, otherwise it will cause the suspension of the magnetic suspension bearing rotor to be unstable and the system stability will deteriorate
In related technologies, the way to identify the rotor bending modal frequency is mainly through the knocking test. Since there are many interference factors in the knocking test, such as the knocking direction, strength, and the platform on which the rotor is placed, the bending modal frequency will be affected. The accuracy of the identification will affect the stability of the magnetic suspension bearing control system

Method used

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  • Vibration frequency determination method and device, compressor system and readable storage medium
  • Vibration frequency determination method and device, compressor system and readable storage medium
  • Vibration frequency determination method and device, compressor system and readable storage medium

Examples

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Embodiment 1

[0101] An embodiment of the present invention proposes a vibration frequency determination method, figure 1 It shows one of the schematic flow charts of the method for determining the vibration frequency in the embodiment of the present invention. Among them, the method includes:

[0102] Step 102, performing an amplitude-frequency response test on the transmission control system according to the first test parameters to obtain a plurality of first vibration frequencies of the rotor;

[0103] Step 104 , based on the plurality of first vibration frequencies, conduct an amplitude-frequency response test on the transmission control system according to second test parameters to obtain a second vibration frequency of the rotor.

[0104] Wherein, the second test parameter is smaller than the first test parameter.

[0105] In this technical solution, the accurate vibration frequency of the rotor is obtained by performing two amplitude-frequency response tests on the transmission co...

Embodiment 2

[0112] In this example, figure 2 The second schematic flow diagram showing the method for determining the control parameter in the embodiment of the present invention. Among them, the method includes:

[0113] Step 202, determine P1 frequencies according to the preset first preliminary test frequency range and the first preliminary frequency incremental step;

[0114] Step 204, for the transmission control system, perform amplitude-frequency response test of rotor vibration according to P1 frequencies, and output vibration amplitude-frequency response curve;

[0115] Step 206, determine the peak amplitude of the vibration amplitude-frequency response curve, and use the frequency corresponding to the peak amplitude as the first vibration frequency;

[0116] Step 208 , based on the plurality of first vibration frequencies, conduct an amplitude-frequency response test on the transmission control system according to the second test parameters, so as to screen out the second vib...

Embodiment 3

[0125] In this embodiment, determining the peak amplitude of the vibration amplitude-frequency response curve, and using the frequency corresponding to the peak amplitude as the first vibration frequency includes: determining the peak amplitude of the vibration amplitude-frequency response curve, combining the peak amplitude with the first vibration frequency A preset threshold is compared, and the frequency corresponding to the peak amplitude greater than or equal to the first preset threshold is used as the first vibration frequency.

[0126] In this technical solution, after the peak amplitude is determined on the vibration amplitude-frequency response curve, the peak amplitude is compared with the first preset threshold, and when the peak amplitude is greater than or equal to the first preset threshold, the The frequency corresponding to the peak amplitude is used as the first vibration frequency.

[0127] Since the bending mode frequency of the rotor appears at a relative...

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Abstract

The invention provides a vibration frequency determination method and device, a compressor system and a readable storage medium. The vibration frequency determination method comprises the following steps: carrying out an amplitude-frequency response test on a transmission control system according to a first test parameter to obtain a plurality of first vibration frequencies of a rotor; performing amplitude-frequency response test on the transmission control system according to a second test parameter based on the plurality of first vibration frequencies to obtain a second vibration frequency of the rotor; wherein the second test parameter is smaller than the first test parameter. According to the embodiment of the invention, the initial amplitude-frequency response test and the precise amplitude-frequency response test are respectively carried out on the transmission control system, so that the bending mode frequency identification accuracy of the rotor is improved, and the stability of the transmission control system is improved.

Description

technical field [0001] The present invention relates to the technical field of compressors, in particular to a vibration frequency determination method, a vibration frequency determination device, a compressor system and a readable storage medium. Background technique [0002] In the magnetic bearing control system, it is necessary to ensure that the control system does not include the force corresponding to the bending mode frequency, otherwise it will cause the suspension of the magnetic bearing rotor to be unstable and the system stability will deteriorate. In related technologies, the way to identify the rotor bending modal frequency is mainly through the knocking test. Since there are many interference factors in the knocking test, such as the knocking direction, strength, and the platform on which the rotor is placed, the bending modal frequency will be affected. The accuracy of identification will affect the stability of the magnetic suspension bearing control system....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P23/14H02P23/04
CPCH02P23/14H02P23/04
Inventor 李田杨斌张鹏飞胡善德贺伟衡刘树清
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD
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