Study on Weak-fault Signal-detection Method Based on Lorenz Chaotic System
XU Shi-ka · Noise and Vibration Control · 2015
A weak signal extraction method was presented to detect the early mechanical faults.Firstly,the weak disturbances similar to the faults and sensitive to the initial conditions were input to the Lorenz system,and the attractor of this system varied obviously with the evolution of the phase trajectories of the chaotic system.Then,the fault could be detected successfully according to the variation of the singular attractors.Finally,the simulation and experiment were carried out.The results show that this method is suitable for the detection of the impulse signal of the rotors effectively.This work has provided a new way for weak signal detection.