卫星热响应测试系统设计

Design and Implementation on Satellite Thermal Response Test System

为实现卫星热控回路热响应关系的快速自动化测量,开发了一种基于虚拟仪器的自动化测试系统;该系统集成了数字万用表、矩阵开关、程控直流电源及转接电缆等硬件,适用于多种卫星接口,最多可实现120个节点测试,阻值测量精度可达0.1+0.01%FS;在LabVIEW平台下使用操作者框架开发了上位机测试操作软件并采用了模块化设计,通过LXI总线控制开关切换数字万用表及直流电源实现了热控回路节点连接关系、负载阻值及热响应测试功能;软件除了具备常规的数据存储及调用查看功能,还可对比用户设计输入及实际测试结果进行合格性判断并生成测试报表;与人工热响应的对比测试及实际应用表明,该系统硬件集成度高,测试结果精确可靠,效率高,操作使用简单,方便现场使用,具有较高的工程应用价值。

To realize rapid automatic thermal response measurement for satellite thermal control circuit,a automatic test system based on the virtual instrument is developed.The system integrated the hardwares of digital multi-meter,matrix switch,programable DC power supply and transfer cables.The transfer cables are applicable to multiple satellite interfaces,and the system can measure up to 120 points in a single test.The system resistance measurement accuracy can reach by 0.1+0.01%of full scale(FS).The correspondent operation software is developed in Labview platform,which adopts the modular design.The circuit connecting relationship,load resistance measurement and thermal response test can be implemented automatically through the LXI bus control switch alternation.Apart from the data management,report generation and qualification judgment,the comparing design inputs and practical test results are also made the qualified judgement and generated to the test report.By comparing with the artificial thermal response properties,the system hardware is highly integrated,and the measured results are accurate and reliable.The system is easy to operate and use in the field.It has good engineering application value.