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Stability Boundary and Enhanced Solution of Dual-Mode Based Micro Gyroscope Mode Matching Technology
Changda Xing1, Xinning Wang2, Zishuo Wang1
1School of Engineering, Ocean University of China, Qingdao 266102, China.
Micromachines
|August 26, 2022
Summary
The stability boundary of dual-mode gyro in-run calibration can cause failure. This study analyzes the boundary and proposes a mode switching solution to enhance calibration reliability and performance.
Area of Science:
- * Control Systems Engineering
- * Inertial Navigation Systems
Background:
- * Dual-mode gyro schemes face stability limitations during in-run frequency split calibration.
- * Severe initial mode mismatch can exceed the stability boundary, leading to calibration failure.
Purpose of the Study:
- * To analyze the stability boundary of closed-loop control systems in dual-mode gyro operation.
- * To propose an enhanced solution for in-run frequency split calibration overcoming stability limitations.
Main Methods:
- * Detailed analysis of the stability boundary through simulations and experiments.
- * Development and engineering implementation of a hybrid solution combining dual-mode schemes and mode switching technology.
- * Validation experiments on a hybrid gyro interface circuit prototype.
Main Results:
- * The stability region is influenced by resonant frequency and Q value; higher resonant frequency and lower Q value widen the stable region but decrease calibration sensitivity and rapidity.
- * The proposed mode switching technology enables pre-calibration of frequency split before normal gyro operation.
- * Engineering implementation and validation experiments confirmed the effectiveness of the enhanced solution.
Conclusions:
- * The proposed mode switching approach effectively removes the limitation of the stability boundary for in-run frequency split calibration in dual-mode gyro systems.
- * This enhancement improves the reliability and performance of dual-mode gyros.
- * The solution is validated through practical engineering implementation and experimental testing.
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