双稳系统处理微弱冲击信号的研究  

A bistable system for detecting a weak pulse signal

作　　者：石鹏[1] 冷永刚[1,2] 范胜波[1] 李晓龙[1] 赖志慧[1] 高毓玑[1] 

机构地区：[1]天津大学机械工程学院,天津300072 [2]天津大学机构理论与装备设计教育部重点实验室,天津300072

出　　处：《振动与冲击》2012年第6期150-154,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(50975202)

摘　　要：双稳系统是研究随机共振的基础。在机械故障诊断中,应用双稳系统的随机共振可以提取湮没在强噪声中的故障信号。首先研究了脉冲信号通过双稳系统的响应,提出了设定迭代初值的脉冲信号检测方法。然后通过分析滚动轴承故障,验证了用双稳系统的随机共振处理含冲击故障信号的实用性。A bistable system is a foundation for studing stochastic resonance.In field of fault diagnosis,stochastic resonance of a bistable system can be used to detect a weak fault signal in strong background noise.Here,a bistable system response to a pulse signal was studied firstly,and then a method for setting initial value of iteration to detect the pulse signal was proposed.By analyzing fault signals of a roller bearing,the practicability of the proposed method in impact fault diagnosis was verified.

关 键 词：双稳系统 冲击信号 故障诊断 

分 类 号：TN911.4[电子电信—通信与信息系统]