SMA低冲击分离螺母设计与试验验证  

Design and Test Verification of SMA Seperation Nut

作　　者：杨铭波[1] 杜三虎[1] 王智磊[1] 孔祥森[1] YANG Mingbo;DU Sanhu;WANG Zhilei;KONG Xiangsen(Shanghai Institute of Satellite Engineering,Shanghai 201109,China)

机构地区：[1]上海卫星工程研究所,上海201109

出　　处：《航天器工程》2020年第5期65-70,共6页Spacecraft Engineering

基　　金：民用航天预研项目(新型低冲击可重复连接分离装置技术研究D020206)。

摘　　要：现代航天器功能密度高,构型复杂,存在大量在轨展开精密部件,传统火工解锁技术难以满足低冲击解锁、可重复使用的需求,针对现有形状记忆合金(Shape Memory Alloy,SMA)解锁技术存在供电电压特殊、供电电流大等问题,提出一种使用常规星载28 V电源的SMA分离螺母装置设计方案,辨识了其中关键设计参数。研制了SMA分离螺母实物产品,并完成了地面测试和飞行验证,结果表明:该装置能在28 V供电、0.7 A电流下实现解锁,解锁冲击时域峰值不大于300 gn。With high functional density and complex configuration,a number of precision components of modern spacecraft need to be deployed on orbit,traditional pyrotechnics can’t meet requirement of low impact release and reusable.Aiming at the disadvantage of special voltage and high current requirement of existing shape memory(SMA)release technology,this paper presents a SMA separation nut which uses common 28V power supply on satellites,and key design parameters of the device is identified.The SMA separation nut is developed and verified by ground test and flight test.The result shows that the device perform release function reliably under 28V DC and 0.7A power supply,and the release impact is less than 300 gn.

关 键 词：航天器 低冲击解锁 形状记忆合金 星载电源 试验验证 

分 类 号：V47[航空宇航科学与技术—飞行器设计]