摘要
提出了一种基于Duffing混沌振子弱正弦信号的检测方法;为了能够检测更加微弱正弦信号的频率,对Duffing系统相关参数加以调整,使系统阈值与微弱正弦信号幅值大致相当;采用Duffing振子阵列法检测微弱正弦信号频率,在检测精度较高的前提下,缩小振子间频率比,增加振子数量;实验仿真表明可以检测幅值最低为0.002V的弱正弦信号。
A new algorithm is proposed for weak sinusoidal signal detecting based on Duffing chaotic oscillator. In order to detect frequency of weaker sinusoidal signal, we adjust the parameters of Dulling system to make the threshold of Dulling system and the amplitude of weak sinusoidal signal at the same level. Furthermore, we make the threshold of Duffing system small by changing relative parameters of Dulling system, reduce the oscillator frequency ratio among oscillators, and increase the number of oscillators to get higher accuracy. Numerical simulation shows it can detect as low as 0. 002V weak amplitude sinusoidal signal.
出处
《计算机测量与控制》
CSCD
北大核心
2011年第6期1301-1303,共3页
Computer Measurement &Control
基金
辽宁省创新团队科研项目(2008T078)
作者简介
任志玲（1976-），女，辽宁阜新人，副教授，硕士生导师，主要从事机械设计与智能控制方向的研究。
