利用双耦合杜芬振子检测含噪移频信号的研究

Research on Detection of Noisy Frequency Shift Signal Using Double Coupled Duffing Oscillators

针对特殊运营场景下采用股道分割方法无法实现邻线干扰防护的问题,分析股道分割抗干扰方案,构造双耦合杜芬阵子模型,并通过时域调幅构建任意频率信号检测模型。依据移频信号特征构造出能够涵盖移频信号所在频段的内策动力序列,利用步长自动调整实现移频信号的搜索,避免了检索移频信号时繁琐的运算过程。搭建仿真模型进行试验,发现在耦合杜芬振子1与振子2中分别加入与内策动力频率对应的待测移频信号,不同的耦合振子均能检索到属于该频段的移频信号,为移频信号的抗干扰研究提供一种新思路。

Adjacent line interference in protection cannot be solved through track segmentation in special operation scenarios. With regard to this problem, this paper analyzed the anti-jamming plan of track segmentation and constructed a double coupled Duffing oscillator model. Through time-domain amplitude modulation, an arbitrary detection model of frequency signals was built. According to the characteristics of frequency shift signals, the internal driving force sequence which can cover the band of the signals was constructed, and the signals were searched by automatically adjusting the step, thereby avoiding the cumbersome operation for retrieving the frequency shift signals. Finally, a simulation model was built for testing. The results show that the frequency shift signals to be measured corresponding to the internal driving force frequency are added to the coupled Duffing oscillator 1 and oscillator 2, and the frequency shift signals belonging to the frequency band can be retrieved by different coupled oscillators. It provides a new idea for anti-interference research on frequency shift signals.