Vibration signal analysis method

A vibration signal and analysis method technology, applied in the field of analysis, can solve problems such as the inability to implement the order tracking analysis method and the inability to install a key phase sensor, etc.

Active Publication Date: 2018-01-09
朗坤智慧科技股份有限公司
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Problems solved by technology

However, limited by site conditions, key phase sensors (eddy current or photoelectric sensors) cannot be installed on site in many cases, making the order tracking analysis method impossible

Method used

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  • Vibration signal analysis method
  • Vibration signal analysis method
  • Vibration signal analysis method

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Embodiment

[0026] A vibration signal analysis method, comprising the steps in turn:

[0027] (1) The collector synchronously collects the vibration acceleration signals and speed data of multiple channels of the wind power generating set, and transmits them to the processor.

[0028] (2) The processor obtains the first time-rotational speed data sequence from the data transmitted by the collector, and the sequence formed by the rotational speed data within 1 second is set as [r 1 ,r 2 ,r 3 ,...,r N ], the rotational speed unit is rev / s, and the corresponding time series is [t 1 ,t 2 ,t 3 ,...,t N ], according to the preprocessing of the time series, the second time data series [dt, 2*dt, 3*dt,...,M*dt] with an interval equal to dt and evenly spaced is obtained, according to the new time series, the previous rotation speed The sequence is linearly interpolated (refer to figure 2 shown), to obtain the second rotational speed data sequence [R 1 , R 2 , R 3 ,...,R M ](refer to ...

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Abstract

The invention discloses a vibration signal analysis method. The method includes following steps: step 1, a collector collects fan operation data and transmits the data to a processor; step 2, obtaining a first time-rotating speed data sequence from the operation data and preprocessing the first time-rotating speed data sequence to obtain a second time-rotating speed data sequence; step 3, calculating the second time-rotating speed data sequence to obtain a time-rotating periodic number sequence; step 4, performing interpolation processing on the time-rotating periodic number sequence to obtaina complete period time sequence; step 5, performing interpolation processing on the complete period time sequence to obtain an angle domain uniform sampling time sequence; step 6, performing anti-aliasing filtering and digital interpolation on original vibration signals through the angle domain uniform sampling time sequence to obtain angle domain equal-angle vibration signals; and step 7, calculating the angle domain equal-angle vibration signals to obtain a vibration order ratio spectrum. According to the method, the vibration signals can be analyzed without installing a key-phase sensor, and a new analysis tool is provided for diagnosis of vibration faults.

Description

technical field [0001] The invention relates to an analysis method, in particular to a vibration signal analysis method. Background technique [0002] Most of the wind farms are located in areas with harsh climate conditions. The wind turbines have been subjected to unstable wind loads for a long time, and have the characteristics of variable speed and load, which determines that the vibration signals of wind turbines are highly unstable. In the traditional method, the vibration signal is directly subjected to Fourier transform, and the instability of the speed transient will produce a "spectrum fuzzy" phenomenon, which cannot effectively extract the fault characteristics of the wind turbine, which brings difficulties to the development of fault diagnosis. [0003] In order to solve the above problems, the researchers proposed a vibration signal order tracking analysis method. While measuring the vibration signal of the wind turbine, synchronously collect the key phase puls...

Claims

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Application Information

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IPC IPC(8): G01H17/00
Inventor 汪江陈松陈龙
Owner 朗坤智慧科技股份有限公司
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