Design and analysis of space repeatable mechanical locking and electromagnetic unlocking mechanisms

GENG Zhiwei; ZHANG Jie; KONG Ning; MA Shuai; WANG Bo; HAN Runqi

doi:10.13700/j.bh.1001-5965.2022.0918

Volume 50 Issue 12

Dec. 2024

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Journal of Beijing University of Aeronautics and Astronautics > 2024 > 50(12): 3947-3956.

GENG Z W，ZHANG J，KONG N，et al. Design and analysis of space repeatable mechanical locking and electromagnetic unlocking mechanisms[J]. Journal of Beijing University of Aeronautics and Astronautics，2024，50（12）：3947-3956 （in Chinese） doi: 10.13700/j.bh.1001-5965.2022.0918

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Design and analysis of space repeatable mechanical locking and electromagnetic unlocking mechanisms

doi: 10.13700/j.bh.1001-5965.2022.0918

1.
School of Mechanical Engineering，University of Science and Technology Beijing，Beijing 100083，China
2.
Beijing Institute of Spacecraft System Engineering，Beijing 100094，China

Funds: National Natural Science Foundation of China (51605026)

More Information

Corresponding author: E-mail: kongning@ustb.edu.cn
Received Date: 10 Nov 2022
Accepted Date: 05 May 2023

Available Online: 02 Jun 2023

Publish Date: 29 May 2023

Abstract

Abstract

The space locking mechanism always faces the problem of a long drive chain, as well as takes large physical space. In this work, a space repeatable mechanical locking and electromagnetic unlocking mechanism has been proposed on the basis of friction self-locking theory. Various finite element analysis software has been used to study the bearing capacity and electromagnetic property of the reusable locking mechanism. The results show that under the maximum axial locking load, the contact forces increase linearly with the increasing time between the steel locking ball and the pressing plate, the ejector pin, as well as the shell. It meets the transitivity criterion and the equilibrium criterion of force. The equivalent stress and deformation of the ejector pin and the lock bead are linear with time as well. The maximum equivalent stress is far less than the yield strength of the material and the device is in a small deformation range. When the rated current is applied to the coil, a stable ohmic loss occurs in the coil with equal current density due to the resistance heating effect. The electromagnetic unlocking technology maintains a roughly constant magnetic field inside. The magnetic agglomeration action in the iron core enhances the magnetic induction intensity on the end face. After the concept was established, a prototype for an electromagnetic unlocking and mechanical locking system in space was produced. This work presents a perspective on the design and analysis of the reusable locking mechanism for the on-orbital docking interfaces.
- electromagnetic unlocking,
- space locking mechanism,
- reusable dock,
- structural design,
- finite element analysis

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References

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