一种模拟整星热环境的小型单机热平衡试验

文章通过对一个典型的单机热分析和热试验的研究,提出了一种小型单机热平衡试验方法,模拟单机在整星环境下的热平衡试验,以避免只为验证其热设计而再次补做整星热平衡试验。为准确模拟单机在星内的辐射和导热过程,通过灰体间辐射热网络法和仪器安装板处单元体热平衡法,给出了等效辐射特征点和等效导热特征点的确定方法;并结合试验结果,对模型修正的合理性、局限性进行了分析,提出了在实际应用过程中应注意的问题。

Small Scale Heat Balance Test to Verify the Thermal Design of Devices Onboard Spacecraft

By means of heat analysis and test of a typical device onboard spacecraft,a small scale heat balance test method was introduced to verify the device heat design,so that the repeated whole satellite's heat balance test can be avoided,and just need to verify the changed design of the key device.An equivalence radiation characteristic node and conductive characteristic node were presented to simulate the whole satellite boundary conditions in which the device existed.In addition,a revised model was introduced to analyze the errors resulted under the hypothetic boundary conditions.The rationality and limits of the method were dissassed,and suggestions in application were presented.