Noise reduction method for vibration signal of mechanical equipment
A technology of vibration signal and mechanical equipment, applied in the field of noise reduction, can solve problems such as poor effect
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[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0025] Such as figure 1 As shown, the present invention provides a noise reduction method for vibration signals of mechanical equipment, which is a method for joint noise reduction of vibration signals based on local mean decomposition and independent component analysis, which includes the following steps:
[0026] (1) Perform local mean value decomposition on the non-stationary vibration signal x(t), the steps are as follows:
[0027] (1.1) Determine all local extremum points (including maxima and minima) n on the vibration signal x(t) i , calculate the average value m of all adjacent two extreme points i :
[0028] m i = n i + n i + ...
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