The Characteristic Parameter Estimation of Low Temperature Target Weak Signal Based on VanderPoi-Duffing System
The weak signal,which is usually submerged in strong noise,is very difficult to detecte for its amplitude and frequency.The dynamic properties of VanderPol-Duffing are studied in this paper.Such system can go into the chaos under certain parameters.In chaotic state the disturbance of weak periodic signals can make the system dynamic behavior change dramatically.Our research results show that the system is from period doubling state to chaotic state when the amplitude of input signal is changed.And it has a remarkable impact influence on the system dynamic performance when the input frequency is varied.The unknown frequency can be detected through counting the numbers of turning point in phase diagram.The simulation results verified that the presented method is feasible and there are a lot of theory values in the research.
VanderPol-Duffing equation the weak signal detection amplitude extracting frequency estimation
Yanchun Xu Danfeng Zhao Mi Lu
College of Information and Communication Engineering Harbin Engineering University,Harbin,China, 150 College of Information and Communication Engineering 1.Harbin Engineering University,Harbin,China, 1 School of Electrical and Computing Engineering Texas A&M University,College Station, USA,77840
国际会议
太原
英文
554-558
2013-04-06（万方平台首次上网日期，不代表论文的发表时间）