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中文摘要：
对Dufiqng振子大周期态相轨迹特性进行了研究，提出了一种利用Duffing振子大周期相轨迹运动实现频率测量的方法．仿真结果表明，该方法的检测信噪比下限要高于现有的基于强参考模式的检测方法，但该方法不存在检测盲区问题，在单振子频率覆盖方面也有了大幅提高，极大降低了检测系统的设计难度，而且单振子即可实现对chirp信号的检测，拓展了Duffing振子检测技术的应用．
英文摘要：
The characteristics of Duffing oscillator＇s phase trajectory in great periodic motion are analyzed, base on which, a new frequency measuring method is proposed. The simulation results indicate, the detecting signal-to-noise ratio lower limit of the proposed method is higher than that of the existed strong referential detecting method. However, the proposed method has no blind angle, and the frequency detection range is greatly enlarged. As a result, the complexity of the measuring system can be reduced on a large scale.In this method,one Duffmg oscillator is capable of measuring chirp signal, which is an exploration for the application of the detection technologies based on Duffing oscillators.
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