一种减小Duffing系统可检测断续正弦信号频率范围的方法  

A Method of Narrowing Frequency Range of Intermittent Sine Signal Detected by Duffing System

作　　者：韩建群[1] 

机构地区：[1]渤海大学工学院,辽宁锦州121013

出　　处：《电子学报》2013年第4期733-738,共6页Acta Electronica Sinica

基　　金：国家自然科学基金(No.51277011);辽宁省教育厅科学技术研究(No.L2010005)

摘　　要：本文针对Duffing混沌系统利用状态变化检测已知断续正弦信号时,正弦信号频率范围较宽的问题,根据Mélnikov方法中的系统参数与待测信号幅度、频率之间的关系,分析证明了增加Duffing系统的阻尼参数提高系统正弦信号检测能力的方法,最后给出了在有、无噪声情况下,调整阻尼参数后Duffing系统对断续正弦信号的检测仿真结果.结果表明本文所提出的方法是有效的.The frequency ranges of intermittent sine signals are relatively wide when Duffing chaotic system detects those given signals by utilizing the state changes. According to this problem, a method is analyzed and proved in this paper, which is based on the relation of system＇s parameters and measured signals＇ amplitudes and frequencies by the method of M61nikov, that Duffing system＇s damping parameters can be increased to improve the ability of detecting sine signals. In addition, simulation results of Duffing system＇s detecting intermittent sine signals are shown by adjusting damping paratr^ters under noise and noise free condition separately. Simulation results show that the presented method is effective.

关 键 词：DUFFING系统 阻尼 频率范围 信号检测 

分 类 号：TN911[电子电信—通信与信息系统]