A method of speedy north-seeking of gyro-theodolite by detecting gyro-moment based on magnetic suspension bearing

In this paper, three reference frames are established, and the rotation rate of the earth is decompounded on the gyro reference frame. The essential principle and procedure of speedy north-seeking by detecting gyro-moment based on magnetic suspension bearing are introduced. It is experimented that speedy and precise north-seeking can be accomplished by using this method.