An improving method for micro-G simulation with magnetism-buoyancy hybrid system

This paper presents a novel solution for the micro-G experiment with magnetism-buoyancy hybrid system. The improvement includes two parts, (i) proposing an innovative system called general balance test bed (GBTB), and (ii) designing a resistance effect compensation system. The GBTB, a special platform, can be used to realize the effect of neutral buoyancy, by using controllable electromagnetic force instead of conventional weight or foam module to eliminate the difference between gravity and liquid buoyancy. In this paper, principles, components, and functions of the GBTB are developed. Then, in order to improve test fidelity, a compensation system is designed to counteract the water resistance effect during maneuver, and a novel prediction law is proposed to make water resistance force prediction more coincident with the real value by introducing control errors and error rates. Finally, the feasibility and effectiveness of the proposed solution are demonstrated through micro-G experiments and tests.