A wind power tower drum vibration signal underdetermined blind source separation method for solving an unknown source number

The invention relates to a wind power tower drum vibration signal underdetermined blind source separation method for solving an unknown source number, and the method comprises the steps of firstly converting a mixed signal into a time-frequency domain, and converting the mixed signal into a multi-dimensional row vector; screening the multiple pieces of time-frequency point data through a principal component analysis method and a mixed time-frequency ratio method based on the multi-dimensional row vector to obtain single-source domain feature data meeting a preset screening formula, and performing normalization processing on the single-source domain feature data to obtain feature data represented based on a direction angle; clustering through a preset modified clustering algorithm to obtain a signal source number and an estimation hybrid matrix; and finally, obtaining a source signal through sparse optimization based on the signal source number and the estimation hybrid matrix. Therefore, when the single-sourc