Application of immune detector in concurrent fault based on evidential theory

Aiming at the complexity of concurrent fault diagnosis for mechanical equipment,particularly for large rotating equipment,this paper put forward the concurrent combination rotary machine fault diagnosis system based on artificial immune systems and evidence theory.The immune system itself-non-recognition mechanism has been derived from the negative selection algorithm for data analysis and processing,and got five kinds of dimensionless index of diagnostic capacity factor in time domain signal,the relative diagnostic capacity factor was normalized as a probability distribution function value,combined with evidence theory fusion rules,to get the final diagnosis.Simulation results show that the probability of reasonable distribution of the fusion results is more clear and accurate to characterize the type of diagnosis.This method for fault diagnosis is valid.