Phase Measurement Method of Aeroengine Vibration Signal Based on Speed Pulse Reconstruction
An aero-engine and vibration signal technology, which is applied in the direction of measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve problems affecting interpolation accuracy, affecting phase estimation accuracy, and limited accuracy, so as to achieve stable and accurate signal phase, suitable for Real-time implementation, the effect of small amount of computation
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[0045] The present invention proposes an aeroengine vibration signal phase measurement method based on rotational speed pulse reconstruction. The content and effects of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0046] refer to figure 2 , the vibration signal phase method includes the following steps:
[0047] Step 1, monitor the speed pulse, and calculate the period T of the speed pulse at the current moment according to the following formula k ,
[0048] T k =t k -t k-1 1)
[0049] Among them, t k is the moment corresponding to the kth rising edge of the speed pulse, k=1,2,3,..., indicating the sequence number of the rising edge;
[0050]Step 2, calculate the vibration signal in the speed pulse period T k The number of points in the collected data, denoted as N k , and record the vibration signal in this period as S k (t), t k-1 k ;
[0051] Step 3, combined with the sampling rate in the actual syste...
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