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Characterization of the bell-shaped vibratory angular rate gyro
1School of Automation, Beijing Institute of Technology, Beijing 100084, China. liuning1898@bit.edu.cn
Sensors (Basel, Switzerland)
|August 23, 2013
Summary
This study introduces the bell-shaped vibratory angular rate gyro (BVG), a novel gyroscope inspired by traditional Chinese bells. Experimental results confirm its advantages in cost, power, sensitivity, and impact resistance for angular velocity measurements.
Area of Science:
- Mechanical Engineering
- Sensor Technology
- Vibratory Gyroscopes
Background:
- The bell-shaped vibratory angular rate gyro (BVG) is a novel device inspired by traditional Chinese bells.
- It utilizes the standing wave precession effect to sense angular velocity.
- The core component is a millimeter-grade, bell-shaped resonator made from Ni43CrTi constant modulus alloy.
Purpose of the Study:
- To present the design, analysis, and experimentation of the BVG.
- To analyze the vibratory characteristics of the bell-shaped resonator.
- To establish the Coriolis coupling relationship and evaluate impact resistance.
Main Methods:
- Derivation of strain, internal force, and equilibrium equations in an orthogonal curvilinear coordinate system.
- Analysis of vibratory character using thin shell theory, obtaining mode shape functions and dynamical equations.
- Finite Element Method (FEM) for impact resistance analysis and comparison with other shell resonators.
Main Results:
- The Coriolis coupling relationship between primary and secondary modes was established.
- The bell-shaped resonator demonstrated superior impact resistance compared to other shell resonators via FEM analysis.
- Experimental characterization confirmed the BVG's gyroscopic effect.
Conclusions:
- The BVG offers advantages including low cost, low power consumption, long lifespan, high sensitivity, simple structure, and excellent impact resistance.
- It is suitable for low and medium angular velocity measurements.
- The novel bell-inspired design contributes to enhanced performance and robustness.
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