摘要
在原有杜芬振子检测微弱特征信号的理论基础上,提出了利用相关系数法来刻画系统微小的相变,证实了微弱特征信号对杜芬系统的影响远大于其他信号对该系统的影响,阐述了利用相关系数法检测极微弱特征信号的步骤,给出了阈值的选择条件。最后将该方法应用于实验当中取得了较好的检测效果。
Based on the theory of duffing system in detecting faint characteristics signal, the tiny phase changes is described by using the correlation. It confirms that the faint characteristics signal impacts Duffing system much larger than others. The steps of detection by correlation are expounded and the choice conditions of the threshold value is given. Finally, it obtains a better result in practice.
出处
《测控技术》
CSCD
北大核心
2009年第4期28-31,共4页
Measurement & Control Technology
关键词
相关
相关系数
杜芬系统
混沌
correlation
correlation coefficient
Duffing system
chaos
