Gravity Compensation Technology of Solar Array Based on Vacuum Negative Pressure Adsorption

doi:10.3901/JME.2020.05.202

Abstract

Abstract: The space deployable mechanism is produced stress or deformation caused by gravity during ground assembly and simulated deployment test. The disappearance of gravity in space environment causes stress release, which results in the performance change of space mechanism and affects its reliable operation on orbit. Aiming at the gravity compensation requirement of ground assembly and deployment test of space deployable mechanisms such as solar array, a gravity compensation method based on vacuum negative pressure adsorption is proposed. The dynamics model of solar array with unloading gravity is established by analyzing the dynamics of solar array deployment. The influence of friction coefficient on the motion performance of vacuum negative pressure adsorption system and the following response characteristics of gravity compensation system are analyzed. It realizes free movement and fast following of gravity compensation system in horizontal plane. The experimental results show that the contact friction coefficient of gravity compensation system based on vacuum negative pressure adsorption is less than 0.08, the response tolerances of gravity compensation system under 40 N solar wing load is±5%, and the comprehensive gravity compensation accuracy can reach 94.6%. Therefore, the gravity compensation method based on vacuum negative pressure adsorption has high degree of freedom and following response speed, which can meet the requirements of precision assembly and simulated deployment test of solar array.

Key words: solar array, vacuum negative pressure adsorption, gravity compensation, planar motion

CLC Number:

TH164

ZHANG Jiabo, WANG Hui, LI Yun, JIANG Liyuan, LI Deyong, HE Pengpeng. Gravity Compensation Technology of Solar Array Based on Vacuum Negative Pressure Adsorption[J]. Journal of Mechanical Engineering, 2020, 56(5): 202-210.

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