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Deformation-Robust MEMS Gyroscopes with Symmetric Folded-Beam Suspensions

This paper presents the design and analysis of a MEMS vibratory gyroscope that effectively detects the Coriolis force proportional to angular velocity. Targeted for applications in mobile devices and automotive stability controls, these gyroscopes are engineered for long-term reliability and performance across various temperatures and mechanical disturbances. Key innovations include the triangular arrangement of symmetric folded-beam suspensions, enhancing stability and minimizing frequency shifts. Future research aims at improving linearity in frequency responses, ensuring greater accuracy and robustness.

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Deformation-Robust MEMS Gyroscopes with Symmetric Folded-Beam Suspensions

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  1. LATERALLY-DRIVEN DEFORMATION-ROBUST MEMS GYROSCOPES WITH THREE SETS OF SYMMETRICALLY ARRANGED FOLDED-BEAM SUSPENSIONS Speaker : 張淵哲 2009/ 11 / 10

  2. Introduction The MEMS vibratory gyroscope, which detects the Coriolis force proportional to the angular velocity, is used in a wide range of applications, such as personal mobile devices and systems that control the stability of automobiles and robotics. In particular, gyroscopes used in automotive systems, have to guarantee long-term stability and high-reliability for over ten years, even when used at a wide range of temperatures and when subject to mechanical vibratory disturbances.

  3. STRUCTURE DESIGN OF DEFORMATION ROBUST GYROSCOPES

  4. FABRICATION PROCESS

  5. SEM micrograph of gyroscopic structure

  6. SIMULATIONS AND RESULTS

  7. pressure controllable laser doppler vibrometer Mode frequencies

  8. Temperature and pressure controllable probe tester

  9. The signal read-out circuitry and experimental setup

  10. CONCLUSION The SAF helps to improve and reduce the mode frequency shift in a wide temperature range. Additionally, by triangularly arranging the three sets of SAF, the nearest spurious mode was able to be separated by more than several kHz from the drive and sense modes. Future research will focus on improving the linearity of the frequency shift.

  11. Thanks for your listening !!

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