Design and Analysis of a Electric Drive Redundant Point-type Separation Device

doi:10.3901/JME.260014

Abstract

Abstract: A non-pyrotechnic redundant locking and release mechanism is proposed in this paper. Based on this mechanism, a compact electrically actuated point-type separation device with integrated locking functionality is designed. First, the overall structural design of the redundant separation device is systematically elaborated, including the layout scheme of key components and the calculation method for design parameters. Subsequently, a dynamic model of the locking and release mechanism is established, followed by systematic simulation analysis. A focus is placed on the investigation of the interaction among torsion spring stiffness, electromagnet response characteristics, and trigger release time. The research results provide theoretical support for the optimized design of the locking and release mechanism, while reliable guidance is offered for engineering decisions such as electromagnet selection, voltage parameter setting, torsion spring matching, and material choice. Furthermore, the designed separation device is subjected to multiple experimental validations, including full-scale separation tests, load-bearing capacity tests, and reliability tests. It is demonstrated by the experimental results that the device exhibits excellent separation performance and high reliability. Stable operation is achieved under complex working conditions, and the application requirements of non-pyrotechnic separation technology are met. Its non-pyrotechnic nature and mechanically redundant unlocking capability not only enhance operational safety but also make it highly promising for applications in aerospace, mechanical automation, and emergency equipment fields.

Key words: non-pyrotechnic separation, locking and release mechanism, redundant drive device, dynamic simulation, reliability testing

CLC Number:

TH122

LI Long, ZHOU Tiansong, Lü Shengnan, YU Bing. Design and Analysis of a Electric Drive Redundant Point-type Separation Device[J]. Journal of Mechanical Engineering, 2026, 62(1): 204-215.

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