First, this paper proposes a static north-seeking mode based on the meridian seeking torque of gyroscope. We
analyze the force situation and stability of the gyro magnetic suspension system in this mode and focus on the principle of
torque balance feedback control technology. Two-position rotary control technology has been designed based on the
sensitive state of the gyro rotor in four special north-seeking positions to reduce the impact of the systematic errors on the
single position north-seeking. Later, we use the north-seeking data to simulate the real-time north-seeking process.
Meanwhile, filter processing is used to improve the quality of the result. Finally, a comprehensive inspection is made to
test the key technologies of the maglev gyro through the practice of an underground project. And it proves that these
technologies have a favorable effect in practical applications.