机载显控设备测试性设计

Testability Design For Airborne Display and Control Equipment

摘要:

机载显控设备作为人机交互终端，具有数据处理及与人交互的工作特点，采用传统BIT（机内测试）测试性设计方法，故障检测率指标难以满足用户要求。根据其设备组成和主要功能，结合FMECA（失效模式影响及危害度分析）分析结果，提出BIT检测与人工检测相结合的方式开展测试性设计，通过TADS软件建立设备测试性模型并进行了计算和分析，设备故障检测率由74.72%有效提高到93.26%，以较小代价实现了用户要求。为其他人机交互机载设备测试性设计提供参考，具有较好的工程实用价值。

Abstract:

As a human-machine interactive equipment of airplane, the airborne display and control equipment has the characteristics of date processing and man-machine interaction. Fault detection rate of this equipment cannot meet user demands by using the old testability methods of BIT (Built-in Test). Depending on the composition and main functions of the equipment and the FMECA (failure mode and effects and criticality analysis) results, the method of testability design by combining with BIT and manual detection is proposed. According to the TADS software, the testability model of the equipment is calculated and analyzed to show that the fault detection rate is effectively improved from 74.72% to 93.26%, which meets the user’s demands at a low cost. The method has good engineering practical value, which may be helpful for the other man-machine equipment of airplane.