Feature parameter extraction method and device of motor running state

The application relates to a feature parameter extraction method and device of a motor running state. The method includes: acquiring a vibration acceleration signal obtained by sampling from each position of a motor and a discrete signal of rotation speed of the rotation shaft; obtaining an acceleration frequency spectrum of the vibration acceleration signal through Fourier transform on the vibration acceleration signal; fitting the discrete signal of the rotation speed to obtain a rotation speed curve of the discrete signal of the rotation speed; extracting an acceleration envelope curve of the acceleration frequency spectrum, using the rotation speed curve to carrying out resampling of equal angular difference on the acceleration envelope curve, and then carrying out Fourier transform toobtain an acceleration envelope spectrum; and the feature parameters of each position of the motor are extracted according to the bearing parameters of the motor and the acceleration envelope spectrum. By adopting this metho