物理学报2012，Vol.61Issue(18)：52-56,5.
Chen系统在微弱信号检测中的应用
Application of Chen's system to detecting weak harmonic signals
摘要
Abstract
The detection of weak harmonic signals has important practical value. In this paper, the detection of weak harmonic signals in strong noise is realized with the controlled Chen's system. Dynamics can be divided into slowly varying dynamics and fast varying dynamics, so a slowly varying dynamics is obtained by an averaging method. The critical values of detection parameters are determined, which lead to a sudden change of system dynamical behavior from periodic orbit to stable equilibrium point. Weak harmonic signals can be detected by adjusting the detection parameters and observing the change of system variables. Simulation results show that weak harmonic signals in strong noise can be detected accurately with this system. Compared with existing detection methods with chaotic oscillator, this method is of stronger immunity to noise, and the accurate range of parameter threshold can be obtained through theoretical analysis, which enables its popularization and application in relevant fields.关键词
Chen系统/微弱谐波信号/信号检测/平均法Key words
Chen's system/weak harmonic signal/signal detection/averaging method分类
数理科学引用本文复制引用
王梦蛟,曾以成,谢常清,朱高峰,唐淑红..Chen系统在微弱信号检测中的应用[J].物理学报,2012,61(18):52-56,5.基金项目
国家自然科学基金（批准号：60972147）和湖南人文科技学院青年基金（批准号：2011QN14）资助的课题. （）
