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Method for judging abnormal work of magnetic suspension bearing

A technology of magnetic suspension bearings and identification methods, which is applied in the direction of mechanical bearing testing, etc., which can solve the problem of few patents for magnetic suspension bearing systems, few fault diagnosis and predictions, and the inability to fully achieve high speed, high precision, and high reliability of magnetic bearing systems , high security requirements and other issues, to achieve the effect of manual fault maintenance and use cost reduction, lower false alarm rate and misdiagnosis rate, and less interference

Inactive Publication Date: 2019-12-06
QINGAN GRP
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AI Technical Summary

Problems solved by technology

However, at present, there are few domestic studies on fault diagnosis and prediction of magnetic suspension bearing systems, and there are very few patents related to fault diagnosis and prediction of magnetic suspension bearing systems in China
Moreover, the traditional fault detection and diagnosis methods cannot fully meet the requirements of high speed, high precision, high reliability and high safety of the magnetic bearing system.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] An example is given as follows, a method for discriminating abnormal operation of a magnetic suspension bearing, which specifically includes the following steps:

[0020] The displacement sensor collects the radial offset of the bearing rotor relative to the rotation axis, and the power amplifier provides the current of the stator coil of the magnetic suspension bearing; there are multiple sensors

[0021] Step 1) Process the data within one sampling period T of each displacement sensor and power amplifier

[0022] Calculate the corresponding Z Z(t) for the data at each moment in the cycle, and at the same time carry out the statistical calculation of the fault count value m1, the formula is: Z(t)=(1-k 0 )Z(t-1)+k 0 X(t); Z(t)-Z(0) is greater than 0, the fault count value m1 is increased by 1, if the difference Z(t)-Z(0) is less than 0, the fault count value m1 is subtracted by 1, and the initial value of m1 is 0;

[0023] 00 0 Perform data calculation on the displac...

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Abstract

The invention belongs to the field of magnetic suspension bearings, and relates to a method for judging abnormal work of a magnetic suspension bearing. The method comprises the following steps: a dataprocessing module processes displacement acquired by a displacement sensor and current acquired by a power amplifier, and carries out abnormity judgment on the processed data. The method can realizereal-time online fault diagnosis, is good in universality and is wide in application range; a fault diagnosis system and a magnetic suspension bearing system are mutually independent in self-control and less in interference; the system adopts combination of automatic diagnosis and manual diagnosis, so that the false alarm rate and the misdiagnosis rate are reduced; and manual fault maintenance anduse cost are greatly reduced, and economic benefits are improved.

Description

technical field [0001] The invention belongs to the field of magnetic suspension bearing systems, in particular to a method for judging abnormal operation of magnetic suspension bearings. Background technique [0002] The magnetic suspension bearing system is a new type of mechatronics system, because of its non-contact, lubrication-free, wear-free and active control features, it breaks through the limitations of traditional machinery. The magnetic suspension bearing system has a high operating speed and a large fault hazard, so it has always been the focus of monitoring and diagnosis technology research. [0003] The fault diagnosis of the magnetic suspension bearing system is extremely important to the stable operation of the system, and can improve its safety and reliability. M.Aenis and R.Nordmann studied the failure of magnetic poles, sensors and other equipment components in the magnetic bearing device, and corrected the system through effective detection. M.k.Muelle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/04
CPCG01M13/04
Inventor 张利余梅云陈金平罗艳彦
Owner QINGAN GRP
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