期刊
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
卷 22, 期 1-3, 页码 1158-1168出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cnsns.2014.08.005
关键词
Time delay; Nonlinear resonance; Signal generation; Signal enhancement
类别
资金
- National Natural Science Foundation of China [51305441]
- China Postdoctoral Science Foundation [2012M510192]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Spanish Ministry of Science and Innovation [FIS2009-09898]
We present an effective way to generate periodic signal in a delayed nonlinear system. The generated signal at a desired frequency can be enhanced greatly by a nonlinear term. Specifically, the amplitude of the generated signal can be much larger than that of the input signal by the cooperation of an appropriate time delay and a nonlinear term. When the primary, subharmonic or superharmonic resonance occurs, the desired signal is improved significantly. Further, the delay time that induces the resonance behavior can be analytically predicted. The result herein is different from the phenomenon of stochastic resonance or vibrational resonance observed in time delayed systems. Compared with the stochastic resonance or vibrational resonance, the method used here is much simpler and the desired signal can be generated in a much wider scope without changing the excitation. We believe that our results might be useful for the signal processing research. (C) 2014 Elsevier B.V. All rights reserved.
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