关键词: 双Duffing振子差分, 单频信号, 复频信号, 间歇混沌

Abstract: This paper describes the intermittent chaos detection principle, combined with differential form the double Duffing oscillator difference system to the weak signal frequency detection, especially proposes the method for complex frequency signal detection with a new meaning, gives the detailed steps of the method and flow chart, the complex frequency signals are detected and the single-frequency signal is also simulated. The results show that, compared with traditional Duffing oscillator array method, this method not only reduces the array number, and improves frequency detection bandwidth without affecting the detection accuracy, reduces the calculation amount.

Key words: double duffing oscillators difference, single frequency signal, complex frequency signal, intermittent chaos