Is the High-Frequency Signal Necessary for the Resonance in the Delayed System?  

作　　者：吕梅蕾 沈刚 王海伦 杨建华 

机构地区：[1]College of Electrical and Information Engineering,Quzhou University [2]School of Mechatronic Engineering,China University of Mining and Technology

出　　处：《Chinese Physics Letters》2015年第1期15-17,共3页中国物理快报（英文版）

基　　金：Supported by the Program of the 12th Five-Year-Plan Key Discipline on Detection Technology and Automatic Equipment of Zhejiang Province of China under Grant No 304;the National Basic Research Program of China under Grant No 2014CB049404;the National Natural Science Foundation of China under Grant Nos 51205392 and 51305441

摘　　要：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.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.

关 键 词：Is the High-Frequency Signal Necessary for the Resonance in the Delayed System 

分 类 号：TN911.7[电子电信—通信与信息系统]