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A Robust Angular Rate Sensor Utilizing 2:1 Auto-Parametric Resonance Excitation.

Bhargav Gadhavi1, Farid Golnaraghi1, Behraad Bahreyni1

  • 1School of Mechatronic Systems Engineering, Simon Fraser University, Surrey, BC V3T 0A3, Canada.

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Summary
This summary is machine-generated.

This study introduces a novel single-axis angular rate sensor that overcomes limitations of traditional designs. It achieves a wider bandwidth and stable performance using auto-parametric resonance, enhancing gyroscope technology.

Keywords:
Microsensorsangular rate sensorauto-parametric resonancenonlinear sensing

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Area of Science:

  • MEMS (Micro-Electro-Mechanical Systems) technology
  • Sensor design and fabrication
  • Nonlinear dynamics and control systems

Background:

  • Conventional Micromachined Vibratory Gyroscopes (MVGs) in open-loop configurations suffer from narrow frequency bandwidths and unstable scale factors.
  • These limitations hinder their performance in applications requiring wide operational frequency ranges and precise measurements.
  • Addressing these shortcomings is crucial for advancing inertial sensing capabilities.

Purpose of the Study:

  • To develop a single-axis angular rate sensor with improved robustness to operating voltage and frequency variations.
  • To overcome the narrow bandwidth and unstable scale factor issues inherent in conventional MVGs.
  • To leverage nonlinearities for enhanced sensor performance.

Main Methods:

  • Utilized inherent forcing and inertial nonlinearities from electrostatic forces and fabrication imperfections.
  • Employed 2:1 auto-parametric resonance to excite the sensor's sense mode.
  • Designed a single-axis angular rate sensor architecture.

Main Results:

  • Achieved a -3 dB frequency bandwidth of 500 Hz, significantly broader than conventional designs.
  • Demonstrated a stable scale factor of 50 μV/°/s.
  • Obtained a wide dynamic range of ±330°/s, indicating robust performance.

Conclusions:

  • The developed single-axis angular rate sensor exhibits enhanced robustness and a broader frequency bandwidth.
  • The use of auto-parametric resonance effectively addresses limitations of conventional MVGs.
  • This sensor design offers a promising advancement for inertial sensing applications.