摘要
研究了一种带摄动的Duffing振子混沌数学模型,详细的分析了其间歇混沌特性。根据Duffing振子对噪声的免疫力,提出了一种新型的频率测量方法,并给出了具体的算法。仿真结果表明,在强噪声背景下,该方法可以准确的测出微弱正弦信号的频率。
A typical intermittent chaotic model-the Dulling oscillator is researched and its character of intermittent chaos is also studied. A new method about frequency measurement is presented. Based on the immunity of Dulling oscillator to noise, an algorithm is given. The result of simulation experiment indicates that the method can be used to measuring frequency of weak sine signal under strong noise background accurately.
出处
《传感技术学报》
CAS
CSCD
北大核心
2005年第3期470-472,共3页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金资助项目(60102002)
河北省博士基金资助项目(B2004522)
霍英东基金资助项目(81057)
河北省自然科学基金(601224)
关键词
DUFFING振子
间歇混沌
微弱信号
测频
Duffing oscillator
intermittent chaos
weak signal
measuring frequency
