基于改进双耦合Duffing振子的微弱信号检测方法  

Weak signal Detection Method Based on Improved Dual-coupling Duffing Vibrator

作　　者：巩学芳 徐武德[1] 马芳兰 张红霞[1] 郑礴[1] GONG Xuefang;XU Wude;MA Fanglan;ZHANG Hongxia;ZHENG Bo(InstituteofsensingTechnology,GansuAcademyofsciences,Lanzhou 730000,China)

机构地区：[1]甘肃省科学院传感技术研究所,兰州730000

出　　处：《自动化与仪器仪表》2022年第10期42-45,50,共5页Automation & Instrumentation

基　　金：甘肃省科学院青年科技创新基金项目(2019QN-05);甘肃省科学院院列科研项目(2019JK-08);甘肃省科学院院列科研项目(2021JK-04);甘肃省科学院应用研究与开发项目(2018JK-02);兰州市城关区科技计划项目(2018KJGG0092);兰州市城关区科技计划项目(2019RCCX0007)。

摘　　要：Duffing振子进行微弱信号检测时,存在非零初相位信号漏检漏测以及抗噪性不好的问题,为此采用将耦合一阶导数项的双耦合Duffing振子和小规模阵列结合的方法,提出了一种新的改进的双耦合Duffing振子算法。提出运用双耦合Duffing振子,采用耦合Duffing振子一阶导数项来提高算法的稳定性和抗噪性能;提出通过阵列的方式,采用4组方程组实现任意初相位正弦信号的检测,减小了传统阵列方式的规模,降低了系统的计算量。通过simulink软件仿真实验表明:该算法实现了任意初相位正弦信号的检测,提高了系统的稳定性和抗噪性。The duffing oscillator is used for weak signal detection suffers from non-zero initial phase signal missing detec-tion and poor anti-noise performance.In view of the above question,an improved dual coupling Duffing oscillator algorithm is proposed by combining the dual coupling Duffing oscillator coupled with the first-order derivative term and the small-scale ar-ray method.The dual coupling Duffing oscillator is proposed to improve the stability and anti-noise performance of the algo-rithm,which adopts the first derivative term of two coupled duffing oscillator.The system uses four sets of equations to realize the detection of random initial phase sine signal by array,which reduces the scale of the traditional array method and the a-mount of calculation of the system.The experimental results of simulink software show that this algorithm realizes the detection of random phase sine signal and improves the anti noise performance of the system.

关 键 词：微弱信号检测 DUFFING振子 任意初相位 阵列 正弦信号 

分 类 号：TH70[机械工程—仪器科学与技术]