Abstract:By analyzing the relationship between gravity measurement accuracy and the tilt angle of the levitation system and the height of the supporting leg, and by considering the heavy weight of the supporting leg and the high precision of the displacement adjustment, we adopt a design of high precision electric cylinder driven by the AC servo motor servicing as support leg. By producing the support leg leveling system and doing a leveling experiment, the tilt measurement accuracy is 0.002°, the minimum displacement adjustment is as small as 2.5 μm, the smallest tilt angle position is found, the gravimeter leveling function is realized, and the relationship between gravity accuracy and tilt angle is verified. The experimental results provide a reference for the leveling work and high-precision gravity measurement of SG.