Mr. Mingfu Wen Profile

Mingfu Wen

at Univ of Maryland College Park

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Proceedings Article | 6 March 2015 Paper

Multi-functional hinge equipped with a magneto-rheological rotary damper for solar array deployment system

Mingfu Wen, Miao Yu, Jie Fu, Zhengzhong Wu

Proceedings Volume 9446, 944648 (2015) https://doi.org/10.1117/12.2181839

KEYWORDS: Magnetism, Motion models, Sensors, Satellites, Aerospace engineering, Structural design, Magnetorheological finishing, Solar cells, Solar energy, Reliability

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This article describes the design and simulation of a novel multi-functional hinge equipped with a rotary magnetorheological damper for solar array deployment system, which is comprised of a hinge, an angular sensor, a positioning and locking mechanism and a rotary damper. In order to achieve the compact design in structure, some components were reused in different function modules. It’s the first to use magnet-rheological fluid (MRF) to dissipate the energy in solar array deployment system. The main advantage in using MR rotary damper instead of a viscous fluid rotary damper is that the damping force of MR damper can be adjusted according to the external magnetic field environment excited. A mechanic model was built and the structure design was focused on the MR rotary damper, a damping force model of this damper is deduced based on hydromechanics with Bingham plastic constitutive model. A simulation of deployment motion was taken to validate the motion sequence of various components during the unfolding and locking process. It can be obtained that a constant damping coefficient can hardly balance the different performance of solar deployment system, then a simulation of the proposed deployment system equipped with rotary MR damper was carried out. According to the simulation, it can be obtained that the terminal velocity decreased by 75.81% and the deployment time decreased by 72.37% compared with a given constant damping coefficients. Therefore, the proposed new type of rotary damper can reach a compromise with different performance utilizing an on-off control strategy.

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