基于PXI总线的机载导航设备通用自动测试系统设计

Design of General Purpose Automatic Test System for Airborne Navigation Equipment Based on PXI Bus

我军机载导航设备种类较多,原有的测试设备不仅数量多且需要通用仪器配套使用,测试效率低,不利于机动转场的需要。本文通过分析各导航设备的测试需求,构建了基于PXI和GPIB总线仪器的通用自动测试系统,提供各设备在飞机上的工作环境;采用面向信号的软件系统开发平台,编制了相应的测试程序;编写基于决策支持系统的故障诊断程序,实现了性能测试与故障诊断的自动化;研制了基于CPLD的多功能编码器,运用高性能运算放大器和微波PIN阵列设计了专用调制器,解决了适配器设计中的难点。

Our military airborne navigation equipment have many types and its original test equipment have many disadvantages such as more number,working with the cooperation of general purpose instruments,low test efficiency and inconvenient transfer.By means of analyzing test requirements of navigation equipment the general purpose automatic test system based on PXI and GPIB bus instrument is built to provide operating environment;Software system development platform faced signal is adopted and the relevant test programs are written.Malfunction Diagnosis program based on decision supporting system is compiled to realize automation of performance test and malfunction diagnosis;Multifunction coder based on CPLD and special modulator employing high quality operational amplifier and microwave PIN array are developed to solve the difficulty in adapter design.