摘要
分析了Duffing振子的混沌运动,阐述了该振子相变对与参考信号频差较小的周期小信号具有敏感性,对白噪声和与参考信号频差较大的周期干扰信号具有免疫力,使Duffing振子应用于微弱信号检测具有可行性。检测不同频率的信号需要不同频率的参考信号,不同的参考信号频率会对系统产生很大影响,通过调整系统参数使得振子对不同频率的信号检测具有普遍性。给出了基于混沌微弱信号检测的具体方案。
The chaotic motion of the duffing oscillator is analyzed. It is concluded that the oscillator phase transform is sensitive to the small signal having the tiny angular frequency ω difference with the referential signal, and immune against the random noise and the larger interference signal having larger angular frequency difference with the referential signal. The application of the oscillator to weak signal detection is feasible. The different frequency ω signal detection needs different frequency of referential signal, different frequency signal detection of the oscillator is universal by altering system parameters. The scheme of weak signal detection based on chaos is given.
出处
《机床与液压》
北大核心
2002年第4期194-196,202,共4页
Machine Tool & Hydraulics
基金
霍英东教育基金会第七届青年教师基金资助项目(71061)
