Is the High-Frequency Signal Necessary for the Resonance in the Delayed System?
Is the High-Frequency Signal Necessary for the Resonance in the Delayed System?
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DOI：
10.1088/0256-307x/32/1/010501
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发表时间：
2015
影响因子：
3.5
通讯作者：
Meilei Lv;G. Shen;Haikuan Wang;Jianhua Yang
中科院分区：
文献类型：
--
作者：
Meilei Lv;G. Shen;Haikuan Wang;Jianhua Yang
讨论了在低频和高频信号激励下的时滞系统中，高频信号引起共振的必要性。通过调节延迟时间，谐振发生在很宽的频率范围内，包括主频率、次谐波频率和超谐波频率。仅在极少数情况下，高频信号对谐振具有积极影响。这是传统的振动共振现象。在大多数情况下，高频激励对于谐振是不必要的。适当的延迟，而不是高频信号，是改善微弱低频信号的关键因素。
In a delayed system excited by low-frequency and high-frequency signals, the necessity of the high-frequency signal on the resonance is discussed. By adjusting the delay time, the resonance occurs in a wide scope of frequencies, including the primary, subharmonic and superharmonic frequencies. Only for very few cases does the high-frequency signal have a positive effect on the resonance. It is the traditional vibrational resonance phenomenon. In most situations, the high-frequency excitation is unnecessary for the resonance. An appropriate delay, rather than the high-frequency signal, is the key factor in improving the weak low-frequency signal.