摘要
利用Duffing振子相变对微弱信号敏感和对噪声免疫的特点,可以对淹没在强噪声背景中的微弱周期信号进行检测,但传统的Duffing振子相变检测方法仅能检测特定频率的周期信号并且会受过渡带的影响。针对上述问题,给出了一种基于Duffing振子变尺度逆相变的微弱周期信号检测方法,通过引入变尺度系数将待测信号进行重构,进而减小了系统参数对检测的影响。建立了仿真模型并进行了仿真实验。分析和仿真结果表明,该方法能够仅利用一组固定的参数来对任意频率的周期信号进行有效的检测,且减少过渡带的影响,具有较好的检测性能。
According to the features of Duffing oscillator that sensitive to weak signal and immune to noise. We realized that it can detect the weak periodic signal which hides in the background of strong noise, but the drawback of the traditional Duffing oscillator is it can only detect the periodic signal of specific frequency and affected by the transition zone. Focusing on those problems, we proposed a weak periodic signal detection method based on variable scale inverse transformation of Duffing oseillator. The signal to be measured is reconstructed by introducing the variable scale coefficient, and then the influence of system parameters on detection is reduced. Simultaneously, the simulation model is established and the simulation experiment is carried out. The analysis and ＇simulation results show that this method ean effectively detect the periodic signal of arbitrary frequency using only a fixed set of parameters, and reduce the influence of transition zone. Proved this method has better detection performance.
出处
《电子测量技术》
2017年第3期143-146,162,共5页
Electronic Measurement Technology
基金
国家自然科学基金(61503224)
山东省重点研发计划(2016GSF117009)
青岛市黄岛区民生计划(2014-2-29)资助项目
关键词
DUFFING振子
过渡带
逆相变
变尺度
Duffing oscillator
transition zone
inverse phase transformation
variable scale
