摘要
在目前的整星热设计中,通常不考虑电缆发热的影响,但随着设计实践的深入,发现在一些特定场合下,电缆发热对设计结果的影响十分明显,有时甚至是决定性的。文章以"海洋二号"卫星某大功率电缆为例,通过电缆所在舱段内设备温度计算结果与在轨实测数据的对比,分析了电缆发热对其所在舱段热设计结果的影响。并以此为基础,研究了电缆发热量与其带来的设计偏差之间的关系,提出了热设计中估算电缆发热对设备温度影响的方法,以及热设计中能否忽略电缆发热影响的判据。
The heat generated by the electric cable is not regularly considered in the satellite thermal design. However, with the development of the thermal design, in some particular instances, the heat generated by the electric cable is found to be an important or even decisive influencing factor in the thermal design program. With the high power electrical cable in the Haiyang-2 satellite as an example, this paper compares the calculated temperature results and the in-orbit temperature data of some equipments in a cabin, and analyzes the influence of the cable＇s heat on the satellite＇s thermal design. Based on the analysis, a relationship between the heat of the electrical cable and the thermal design difference brought by it is obtained. An estimation method of the impact of the cable＇s heat on the equipment＇s temperatttre is proposed, together with a criterion to determine whether the cable＇s heat can be ignored or not in the same satellite thermal design.
出处
《航天器环境工程》
2014年第1期83-87,共5页
Spacecraft Environment Engineering
关键词
卫星热设计
大功率电缆
电缆发热
热分析模型
在轨温度
thermal design for satellite
high-power electrical cable
cable heating
thermal analysis model
in-flight temperature
