Maglev gyro station accuracy assessment based on latitude difference

作者：Shi Zhen^*; Yang Zhiqiang; Zhang Zhe

来源：Journal of Southeast University(Natural Science Edition), 2013, 43(SUPPL.2): 343-346.

DOI：10.3969/j.issn.1001-0505.2013.S2.027

• Accuracy assessment
• Accuracy test
• Azimuth accuracy
• High-precision
• Latitude
• Moment of inertia
• Short term stability
• Torque equilibrium

The torque equilibrium equation under the static north-seeking theory combining with the high-precision maglev gyro station developed by our country is studied. The parameters such as the geographic latitude, the moment of inertia and the rotational angular velocity etc. are the main factors that influence the stability accuracy of the gyro. The relationships between the factors and the north-seeking accuracy are analyzed. The north-seeking accuracies of the same gyro station can be different in different latitudes because of the earth rotational angular velocity. And the change of the gyro rotor moment of inertia can lead to instability of the same instrument constant. Therefore, a gyro station test method is proposed, which takes the differences in latitude and the long- and short-term stability of the instrument constant into account. And the method is verified in the long- and short-term accuracy test of one gyro station in different latitudes.

• 出版日期2013