Vibration order tracking analysis method

Abstract

The embodiment of the invention provides a vibration order tracking analysis method, and the method comprises the following steps: carrying out the collection of real-time vibration and rotating speed signals under a pseudo-synchronous sampling condition; performing timing compensation on the rotating speed pulse by adopting a high-frequency counter to obtain an instantaneous rotating speed and an instantaneous phase sequence which are synchronous with rotating speed sampling; according to the rotating speed sampling frequency and the compensated instantaneous phase sequence, obtaining a sampling time list sequence corresponding to the phase to be interpolated by using an interpolation resampling method; and according to the interpolated phase sequence and the corresponding sampling time list, in combination with the vibration sampling frequency and the time sequence generated by corresponding vibration, using the interpolation method again to obtain a new interpolation vibration sequence of the corresponding moment of the interpolated phase sequence. The method can greatly improve the calculation efficiency of a traditional tracking algorithm.

Description

technical field [0001] The various embodiments of the present application belong to the technical field of vibration data analysis of rotating machines, in particular vibration analysis methods under variable speed conditions of rotating machines. Background technique [0002] The variable speed condition contains rich dynamic characteristic information of mechanical products, which is an important content of its fault diagnosis and performance evaluation. At present, in order to overcome the problem of vibration data spectrum ambiguity caused by rotating machinery speed fluctuations or drastic changes, an angle domain resampling algorithm has been proposed to solve this problem to a certain extent. Related algorithms are widely used in the analysis of rotating machinery vibration data. The current mainstream acquisition The analysis strategy is: determine the sampling frequency according to the highest analysis frequency of the vibration data, collect and store the vibratio...

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Problems solved by technology

[0003] Therefore, the main defect of the current traditional collection and analysis lies in: Fs represents the sampling frequency of data collection, and Fs r Indicates the rotational frequency of the tracked shaft, N indicates the number of pulses generated by the speed sensor when the speed monitoring shaft rotates one circle, and R indicates the transmission ratio between the tracked axis and the speed monitoring shaft (when the tracked axis and the speed monitoring shaft are the same axis, the value of R is 1), then the expression of the pulse number M per second of the collected speed signal is: M=R·F r ·N

[0007] 3. The angle domain resampling is performed on the vibration data collected before and after the analysis software. Due to the data truncation when obtaining the phase, the data segments after the angle domain resampling cannot be spliced ​​smoothly, and unnecessary frequency components are introduced. Currently, Some algorithms are not suitable for real-time analysis of data segments stored in segments

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