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Study of weak vibrating signal detection based on chaotic oscillator in MEMS resonant beam sensor

机译：MEMS谐振梁传感器中基于混沌振荡器的微弱振动信号检测研究

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摘要

In this paper, the application of weak signal detection based on chaotic oscillator is studied in a MEMS resonant beam sensor. Chaotic oscillator can detect weak signal which is submerged in the background of large noise. According to the frequency and phase characteristic of the output vibrating signal, reference current signal with fixed frequency difference and same phase to the output signal is set. Frequency and phase of the signal are fixed by detection resistor which works as a multiplier. By calculating the maximum Lyapunov exponent, detection threshold is obtained, and motion change of detection system is monitored. The results of numerical simulation and experiment show that this method can effectively detect the weak resonant signal and find the resonant frequency accurately by setting the threshold of the chaotic oscillator, and it is immune to the noise.
机译：本文研究了基于混沌振荡器的微弱信号检测技术在MEMS谐振束传感器中的应用。混沌振荡器可以检测到淹没在大噪声背景下的微弱信号。根据输出振动信号的频率和相位特性，设置频率差固定且与输出信号同相的参考电流信号。信号的频率和相位由检测电阻固定，该电阻用作乘法器。通过计算最大李雅普诺夫指数，获得检测阈值，并监测检测系统的运动变化。数值仿真和实验结果表明，该方法通过设置混沌振荡器的阈值，可以有效地检测出较弱的谐振信号，准确地找到谐振频率，并且不受噪声影响。

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  • 来源
    《Mechanical systems and signal processing》 |2015年第1期|535-547|共13页
  • 作者

    Huichao Shi; Shangchun Fan; Weiwei Xing; Jinhao Sun;

  • 作者单位

    School of Instrument Science and Opto-electronics Engineering, Beihang University, Beijing 100191 China,Science and Technology on Inertial Laboratory, Beihang University, Beijing 100191, China;

    School of Instrument Science and Opto-electronics Engineering, Beihang University, Beijing 100191 China,Science and Technology on Inertial Laboratory, Beihang University, Beijing 100191, China;

    School of Instrument Science and Opto-electronics Engineering, Beihang University, Beijing 100191 China,Science and Technology on Inertial Laboratory, Beihang University, Beijing 100191, China;

    School of Instrument Science and Opto-electronics Engineering, Beihang University, Beijing 100191 China,Science and Technology on Inertial Laboratory, Beihang University, Beijing 100191, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    MEMS resonant sensor; Weak signal detection; Duffing oscillator; Maximum Lyapunov exponent;

    机译：MEMS谐振传感器;弱信号检测;Duffing振荡器;最大李雅普诺夫指数;

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