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Research on the Configuration Optimization of All-Metal Micro Resonant Hemisphere
Xibing Gu1, Zhong Su1,2, Xiangxian Yao1
1Beijing Key Laboratory of High Dynamic Navigation Technology, Beijing Information Science and Technology University, Beijing 100192, China.
Sensors (Basel, Switzerland)
|November 27, 2024
Summary
Optimizing structural parameters and minimizing errors in all-metal micro resonant gyroscopes significantly improves accuracy. This study enhances resonator performance by reducing frequency splitting through refined finite element modeling and parameter adjustments.
Area of Science:
- Mechanical Engineering
- Vibrational Analysis
- Precision Instrumentation
Background:
- The accuracy of all-metal micro resonant gyroscopes is critically dependent on the vibrational characteristics of the hemispherical resonator.
- Structural parameters and form/position errors directly impact resonator performance and overall gyroscope accuracy.
Purpose of the Study:
- To investigate the influence of structural parameters and processing errors on the vibration characteristics of hemispherical resonators.
- To optimize resonator design and minimize frequency splitting for enhanced gyroscope accuracy.
Main Methods:
- Finite element modeling of an ideal hemispherical resonator.
- Optimization of meshing methods to improve simulation accuracy (refined frequency difference to 0.1 Hz).
- Analysis of the impact of various structural parameters and form/position errors (shell thickness, axis, plane, tooth errors) on natural frequencies and frequency splitting.
Main Results:
- Identified shell thickness and rectangular tooth structure as primary factors affecting vibration modes and frequency splitting.
- Provided optimization suggestions for structural parameters, achieving frequency splitting variations below 1 Hz.
- Reduced the frequency splitting of the All-Metal Micro Resonant Hemisphere by an order of magnitude to 14 Hz post-optimization.
Conclusions:
- Optimized structural parameters and minimized processing errors are crucial for enhancing the performance of all-metal micro resonant hemispheres.
- The study demonstrates a significant improvement in resonator accuracy through targeted design modifications and error analysis.
- Finite element simulation is an effective tool for analyzing and optimizing resonant gyroscope components.
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