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Temperature drift compensation for Hemispherical Resonator Gyro based on natural frequency
1College of Mechanical Engineering and Automation, National University of Defense Technology, Changsha 410073, Hunan Province, China. wangxu-lit@163.com
Sensors (Basel, Switzerland)
|July 11, 2012
Summary
Temperature changes affect Hemispherical Resonator Gyro (HRG) output. This study develops a temperature compensation model using the resonator's natural frequency, successfully reducing gyroscope drift for wider applications.
Area of Science:
- Physics
- Mechanical Engineering
- Instrumentation
Background:
- Temperature fluctuations significantly impact Hemispherical Resonator Gyro (HRG) performance.
- Accurate compensation is crucial for reliable HRG operation across varying thermal environments.
Purpose of the Study:
- To establish a temperature compensation model for HRGs based on resonator natural frequency.
- To demonstrate the efficacy of this model in mitigating temperature-induced output drift.
Main Methods:
- Developed a mathematical model correlating HRG temperature with its natural frequency.
- Utilized Taylor expansion for the model and calibrated coefficients via experiments.
- Applied stepwise linear regression for drift compensation based on natural frequency.
Main Results:
- Experimental data confirmed a direct relationship between temperature and natural frequency.
- Each temperature uniquely corresponds to a specific natural frequency.
- The temperature-frequency compensation method effectively reduced HRG output drift.
Conclusions:
- The proposed temperature-frequency compensation method is a valid and suitable approach for HRG drift reduction.
- This technique enables HRG application over an expanded temperature range.
- Natural frequency serves as a reliable proxy for temperature compensation in HRGs.
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