CAJ | 학술논문

针对机械系统早期故障信号较弱，难以准确判断提取的问题，提出了一种基于Lorenz混沌系统初值敏感性的弱故障信号检测法。将设备早期弱故障信号做为初始值的微弱扰动输入Lorenz系统，随着混沌系统的演变，Lorenz吸引子将产生巨变，从而达到检测设备弱故障的目的。为验证其有效程度，进行了仿真分析和转子冲击故障的检测结果表明，此方法可以有效地检测到转子冲击故障，为混沌弱信号检测提供了一种新方法和思路。
침대궤계계통조기고장신호교약，난이준학판단제취적문제，제출료일충기우Lorenz혼돈계통초치민감성적약고장신호검측법。장설비조기약고장신호주위초시치적미약우동수입Lorenz계통，수착혼돈계통적연변，Lorenz흡인자장산생거변，종이체도검측설비약고장적목적。위험증기유효정도，진행료방진분석화전자충격고장적검측결과표명，차방법가이유효지검측도전자충격고장，위혼돈약신호검측제공료일충신방법화사로。
A weak signal extraction method was presented to detect the early mechanical faults. Firstly, the weak distur-bances 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 provid-ed a new way for weak signal detection.