用于卫星冗余低温冷却的轻型热开关
A lightweight thermal heat switch for redundant cryocooling on satellites
摘要：
以前设计的空间应用的低温热开关已被优化为低质量，高结构稳定性和可靠性。热开关利用热塑性聚乙烯的大线性热膨胀系数（CTE）来驱动。一个结构模型，其中包括温度依赖的性能的致动器，推导出能够预测开关部件之间的接触压力。该压力用于热模型中，以预测不同热负载和工作温度下的开关性能。这两个模型被用来优化开关的质量和稳定性。其可靠性已通过开关的循环驱动和振动台测试得到证明。
英文摘要：
A previously designed cryogenic thermal heat switch for space applications has been optimized for low mass, high structural stability, and reliability. The heat switch makes use of the large linear thermal expansion coefficient (CTE) of the thermoplastic UHMW-PE for actuation. A structure model, which includes the temperature dependent properties of the actuator, is derived to be able to predict the contact pressure between the switch parts. This pressure was used in a thermal model in order to predict the switch performance under different heat loads and operating temperatures. The two models were used to optimize the mass and stability of the switch. Its reliability was proven by cyclic actuation of the switch and by shaker tests.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
