新型热刀式锁紧释放装置设计与试验
发布时间：2019-05-07 14:29
【摘要】：为确保小型航天器预应力可展开结构的锁紧释放可靠,设计一种新型的热刀式锁紧释放装置.介绍装置的基本原理及构造,改进热刀电热元件的设计,对热刀装置进行热仿真分析与电热性能测试.通过锁紧捆绳的参数对比与试验,选择Dyneema绳并说明捆绳蠕变控制方案.设计试验研究捆绳预紧力与收拢锁定状态结构基频及平均熔断时间的关系并确定捆绳预紧力的准确值,提出标准化的预紧力施加装置及施加方案.在各种工况下进行解锁功能试验,均可顺利解锁可展开结构,验证装置的可行性.
[Abstract]:In order to ensure the reliability of locking release of the prestressed deployable structure of small spacecraft, a new type of hot knife locking release device is designed. This paper introduces the basic principle and structure of the device, improves the design of the electro-thermal element of the hot-knife, carries on the thermal simulation analysis and the electrothermal performance test to the hot-knife device. By comparing and testing the parameters of the fastening rope, the Dyneema rope is selected and the creep control scheme of the tie rope is explained. The relationship between the pre-tightening force and the fundamental frequency and the average melting time of the tie-in structure is studied experimentally and the exact value of the pre-tightening force is determined. The standardized pre-tightening force applying device and scheme are put forward. The unlocking function test is carried out under various working conditions, and the unlocking and unfolding structure can be successfully unlocked, and the feasibility of the device can be verified.
【作者单位】： 浙江大学空间结构研究中心;
【基金】：国家“863”高技术研究发展计划资助项目(128205-E31403)
【分类号】：V423
，
本文编号：2471159
[Abstract]:In order to ensure the reliability of locking release of the prestressed deployable structure of small spacecraft, a new type of hot knife locking release device is designed. This paper introduces the basic principle and structure of the device, improves the design of the electro-thermal element of the hot-knife, carries on the thermal simulation analysis and the electrothermal performance test to the hot-knife device. By comparing and testing the parameters of the fastening rope, the Dyneema rope is selected and the creep control scheme of the tie rope is explained. The relationship between the pre-tightening force and the fundamental frequency and the average melting time of the tie-in structure is studied experimentally and the exact value of the pre-tightening force is determined. The standardized pre-tightening force applying device and scheme are put forward. The unlocking function test is carried out under various working conditions, and the unlocking and unfolding structure can be successfully unlocked, and the feasibility of the device can be verified.
【作者单位】： 浙江大学空间结构研究中心;
【基金】：国家“863”高技术研究发展计划资助项目(128205-E31403)
【分类号】：V423
，
本文编号：2471159
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