摘要
在工程信号处理过程中信号常超出随机共振绝热近似或线性响应理论的小参数要求而成为大参数信号。深入探讨非线性双稳系统随机共振发生机理和条件要求,将频率调制技术与随机共振理论相结合,提出用调制随机共振的方法实现随机共振理论在工程信号检测中的应用,进行了数值仿真分析证明其有效性,并将该方法应用于轴承内圈点蚀故障的检测。
In engineering signal processing,parameters of the signal are often beyond the requirements of being small parameters in adiabatic approximation approach or linear response theory of stochastic resonance.In the paper,the mechanism and condition requirements of stochastic resonance of nonlinear bistable system were discussed.By combining the frequency modulation technique with the theory of stochastic resonance,a method based on modulated stochastic resonance was suggested to achieve weak signal detection in engineering applications.Numerical simulations prove its effectiveness.The method has been successfully used to detect the fault of pitting corrosion on bearing inner race.
出处
《振动与冲击》
EI
CSCD
北大核心
2012年第3期132-135,140,共5页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(50975202)
关键词
微弱信号检测
随机共振
双稳系统
频率调制
weak signal detection
stochastic resonance
bistable system
frequency modulation
作者简介
夏均忠男，博士，副教授，1967年生
