基于随机共振的任意大频率微弱信号检测方法研究  

Study on high frequency weak signal detection method based on stochastic resonance

作　　者：樊养余[1] 李利品[1] 党瑞荣[2] 

机构地区：[1]西北工业大学,西安710072 [2]西安石油大学光电油气测井与检测教育部重点实验室,西安710065

出　　处：《仪器仪表学报》2013年第3期566-572,共7页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(50974103)资助项目

摘　　要：通用非线性随机共振系统(参数a=1,b=1)在检测微弱信号时受小频率参数和弱信号幅度的约束,给实际应用带来了很大困难。针对这一情况,提出了一种能够检测大频率微弱信号的随机共振检测方法,通过调整系数k改变非线性参数b,使输入弱信号满足共振幅度要求;调整系数R改变非线性参数a、b,将共振频率提高R倍,从而实现了大频率微弱信号的随机共振。通过理论分析和数值仿真,研究了系数k和R的调整方法、步长等,构建了一种可实现的大频率微弱信号检测方法。Common nonlinear stochastic resonance system（a = 1 ,b = 1 ）is subject to the restriction of small frequency parameter and weak signal amplitude in weak signal detection, which brings difficulty to actual applications. In order to solve this problem, a stochastic resonance detection method suitable for high frequency weak signal detection is presented. The method can make the input high frequency weak periodic signal meet the stochastic resonance amplitude requirement through adjusting the coefficient k to change the nonlinear parameter b; and also realize the stochastic resonance of high frequency weak signal through adjusting the coefficient R to change the nonlinear parameters a,b to improve the resonance frequency by R times. With theoretical analysis and numerical simulation, the adjustment methods and adjustment steps of coefficients K and R are studied; and a realizable high frequency weak signal detection method is established.

关 键 词：随机共振 参数调节 共振频率 微弱信号检测 

分 类 号：TN911.23[电子电信—通信与信息系统] TH73[电子电信—信息与通信工程]