板级自动测试系统在航空电子装备中的应用

航空装备大修厂承修的机载电子装备中，常遇到较早期设计的电路板产品，这类产品相对而言可测性较低，测试方案不明确且产品维修资料较少，若遇到因电路板故障引起装备失效的情况，维修周期较长且故障排除效果不稳定，对维修单位而言在电路板级故障诊断带来很大困难。国内早期板级自动测试系统的研究偏向于专板专用，专业性较强通用性较弱，与实际维修保障应用方面相结合的案例较少，本文针对这一短板，对通用性较强的板级产品自动测试系统及其在航空电子装备中的应用进行了研究，选取故障较高的视频信号处理板为样本，用实例阐述了如何以板级测试系统为平台，确定了板级故障诊断设计方案，设计了测试开发流程，增强了维修行业对板级故障诊断技术的完备性与多样性。

Application of circuit board level automatic test system in avionics equipment

In the airborne electronic equipment repaired by the aviation equipment overhaul factory, it is often encountered in the early design of circuit board products, such products are relatively less measurable, the test plan is not clear and the product maintenance information is less, if encountered Due to equipment failure caused by circuit board failure, the maintenance cycle is long and the troubleshooting effect is unstable, which is very difficult for the maintenance unit to diagnose at the board level. The research on the early board-level automatic test system in China is biased towards the special board, the professionalism is weak and the versatility is weak, and there are few cases combining with the actual maintenance support application. This article is aimed at this short board and has strong versatility. The board-level product automatic test system and its application in avionics equipment were studied. The high-frequency video signal processing board was selected as a sample. The example was used to illustrate how to determine the board-level fault diagnosis based on the board-level test system. The design plan, designed the test development process, enhanced the completeness and diversity of the board-level fault diagnosis technology in the maintenance industry..