Blind source separation method for noise reduction of vibration signals of solid rocket engine

The invention provides a blind source separation method for noise reduction of vibration signals of a solid rocket engine. The number of source signals in acquired mixed signals under the condition that the source signals are unknown is distinguished according to an AIC criterion, and independent vibration source feature information is acquired from the mixed signals through observation signals ofa sensor according to a FastICA algorithm obtained after a learning function is improved. The problem about noise reduction of the vibration source signals under the condition that environments and equipment are complex is solved, compared with filtering and other traditional methods, the method better conforms to the solid engine test condition, useful source signals are not filtered out, the manual analysis error possibility is eliminated, the beneficial effects of intelligence, universality, adaptability and the like are achieved, two or more mixed mechanical vibration signals can be wellseparated, the purpose of