Wind driven generator gearbox signal sparse decomposition method and device and storage medium

The invention discloses a sparse decomposition method and device for a gearbox signal of a wind driven generator and a storage medium, and the method comprises the steps: constructing a sparse decomposition structure of the gearbox signal of the wind driven generator, constructing a separation matrix under the condition that the original signal aliasing condition of the gearbox is unknown, and carrying out the separation of sparse characteristic parameters through signal amplitude characteristic parameters; by maximizing an objective function, the construction of a separation matrix is optimized, and the performance of sparse decomposition is improved; signal amplitude and time codes are used as input, complex local average decomposition is carried out, a virtual channel is constructed, the problem of underdetermined blind source separation is solved, the processing capacity of sparse decomposition on complex signals is enhanced, and output of original signals in one-to-one correspondence with sparse characte