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

Abstract

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.

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“…There are several methods for meeting these demands, such as the zero-G airplane, drop tower, air-bearing suspension system and neutral buoyancy system. [A detailed introduction of these methods and the global facilities may be seen in Yuan et al (2015) and Zhu et al (2016)]. To satisfy the flexibility, accuracy, complex operation and controllability, studies of test design and system development arose (Klimov and Poduraev, 2015; Viswanathan et al, 2013; Wen et al, 2016).…”

“…In our laboratory, a novel facility has been established. This can achieve a neutral buoyancy balance quickly by changing the environmental force, and a controllable electromagnetic force is introduced to compensate for the residual gravity, which is called the magnetism–buoyancy hybrid micro-gravity experiment system (MBHMES) (Yuan et al, 2015; Zhu et al, 2016).…”