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Temperature Effect on Residual Magnetic Field of Atomic Gyroscope Magnetic Shielding System: A High-Precision
Yitao Chen1, Junzhong Li2, Shengxin Lin1
1School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China.
Sensors (Basel, Switzerland)
|July 28, 2026
Summary
A new analytical model accurately predicts magnetic shielding drift in atomic gyroscopes caused by temperature changes. This fast, theoretical approach overcomes limitations of previous methods, improving gyroscope bias stability.
Area of Science:
- Physics
- Materials Science
- Engineering
Background:
- High-precision atomic gyroscopes require stable magnetic shielding.
- Temperature-dependent magnetic hysteresis in shielding materials causes residual magnetic field drift and measurement errors.
- Current finite element methods (FEM) are computationally expensive for analyzing temperature-magnetic coupling.
Purpose of the Study:
- To develop a fast, theoretical model for predicting residual magnetic fields in multilayer cylindrical magnetic shielding systems.
- To accurately characterize the temperature-magnetic coupling effect in magnetic shielding.
- To provide a theoretical basis for analyzing and compensating thermally induced magnetic errors in atomic gyroscopes.
Main Methods:
- Established a static magnetic field analytical model for multilayer cylindrical shielding.
- Incorporated nonlinear magnetization theory to correct for material permeability variations.
- Developed an improved Jiles-Atherton (J-A) model with a temperature correction factor.
Main Results:
- The analytical model rapidly and independently predicts residual magnetic field distribution at various temperatures.
- The model shows a deviation of approximately 5% from FEM simulations after accounting for hysteresis.
- The residual magnetic field correlates negatively with temperature, with measured results aligning with model predictions within the -40 °C to 60 °C range.
Conclusions:
- The developed analytical model accurately predicts temperature-dependent residual magnetic field drift in magnetic shielding systems.
- The model offers a faster alternative to FEM for analyzing thermal effects on magnetic shielding.
- This research provides theoretical support for improving the bias stability of atomic gyroscopes by addressing thermal magnetic errors.
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