文章阐述了自相关检测方法和阻尼比扰动Duffing振子检测系统的检测原理,在此基础上提出了自相关与阻尼比扰动Duffing振子检测系统相结合的一种新检测方法.文中介绍了新方法的检测原理,建立了检测模型,并在白、色噪声背景下对方渡信号的进行捡测,仿真结果表明新检测方法的输入信噪比检测门限明显优于自相关检测方法以及单独采用阻尼比扰动的混沌检测方法,白噪声、两种色噪声背景下信噪比分别为-35.97dB、-34.75dB和-32、1dB.%This article describes the detection principle of auto-correlation method and perturbation disturbing the damping rate of the duffing oscillator detection system, based on principle, proposes a new detecting method combined auto-correlation with disturbing the damping rate of the duffing oscillator detection system. In the paper, detection principle of the new method is introduced, detection model is builded, and the detection is conducted under the square ware signal under white/color noise background. The results show that its threshold of input SNR is significantly superior to auto-correlation method as well as disturbing the damping rate of the duffing oscillator detection method alone, and SNR is -35.97dB、-34.75dB and - 32.1dB under two types colored noise background.
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