Magnetic suspension bearing shaft system falling track response recognition method and device based on Hilbert transform

A magnetic levitation bearing and response recognition technology, which is applied in the direction of measuring devices, mechanical bearing testing, and mechanical component testing, etc., can solve problems such as complex equipment structure, difficult to accurately measure friction force, and complex supporting structure of protective bearings. The method is simple Convenient and real-time effect

Active Publication Date: 2017-02-22
TSINGHUA UNIV
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Problems solved by technology

However, in most equipment, the rubbing force between the shafting and the inner ring of the protective bearing is difficult to measure accurately, and a force sensor must be installed to improve the measurement accuracy
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  • Magnetic suspension bearing shaft system falling track response recognition method and device based on Hilbert transform
  • Magnetic suspension bearing shaft system falling track response recognition method and device based on Hilbert transform
  • Magnetic suspension bearing shaft system falling track response recognition method and device based on Hilbert transform

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Embodiment Construction

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0046] The following describes the method and device for identifying the fall track response of a magnetic suspension bearing shafting system based on Hilbert transform according to an embodiment of the present invention with reference to the accompanying drawings. A method for the identification of the drop trajectory response of transformed magnetic bearing shafting.

[0047] figure 1 It is a flow chart of the Hilbert transform-based method for identifying the drop track response of the magnetic suspension bearing shaft system...

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Abstract

The invention discloses a magnetic suspension bearing shaft system falling track response recognition method and device based on Hilbert transform, wherein the method comprises the following steps of obtaining a continuous time domain displacement signal of a shaft system; setting the sampling frequency of the continuous time domain displacement signal, and obtaining a discrete time domain displacement signal; obtaining an instantaneous frequency spectrum signal through Hilbert transform; setting cutting-off time duration and a threshold value; solving the variance and expectation of the instantaneous frequency in the cutting-off time; comparing the variance and expectation of the instantaneous frequency with the threshold value; determining the track response of the shaft system. The method has the advantages that only the displacement signal of the shaft system is used; the obtaining is easy; the instantaneous calculation of frequency change can be realized; the real-time performance is good; simplicity, convenience and high speed are realized.

Description

technical field [0001] The invention relates to a post-processing technology of a magnetic suspension shafting displacement signal, in particular to a method and a device for quantitatively dividing the trajectory response of a high-speed shafting of a magnetic suspension bearing after a drop based on the Hilbert transformation of the shafting displacement signal. Background technique [0002] The application of magnetic bearings in the field of rotating machinery is increasing year by year. Magnetic suspension bearings can provide non-contact support, especially suitable for use in high-speed, low-loss, and low-noise situations, and the stiffness and damping of magnetic suspension bearings can be adjusted. Bearing protection is one of the key components of magnetic suspension bearings. One of its main functions is to temporarily support the high-speed rotating shafting when the magnetic bearing fails, and make it resuspend or decelerate safely. At present, rolling bearing...

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Application Information

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IPC IPC(8): G01M13/04G06F17/15G06F17/18
CPCG01M13/045G06F17/15G06F17/18
Inventor 吕民东刘涛王子羲贾晓红王玉明
Owner TSINGHUA UNIV
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