摘要
介绍了 BIT的概念和种类 ,并以某机载计算机为例 ,从数字 I/O通道、A/D通道、D/A通道及串行接口等方面 ,描述了 BIT设计 ,并针对 BIT设计中的关键技术提出了相应的解决措施。飞行结果表明 :BIT技术的应用 ,提高了系统可靠性和对故障的应变能力 ,同时也为系统调试及维护提供了极大的方便。该方法也可应用于其它智能仪表及工业控制计算机等系统的设计中。
China needs to develop its own BIT capability in airborne computer. For a specific airborne computer used in unmanned aerial vehicle (UAV) we designed its BIT capability and developed the details of key techniques, which are absolutely necessary in design but not disclosed in the open literature. Section 2 gives the above mentioned details and includes the following eight topics: (1) core testing of computers (subsubsection 2.1.1); (2) testing of digital I/O (input/output) channel (subsubsection 2.1.2); (3) testing of A/D (analog/digital) and D/A (digital/analog) channels (subsubsection 2.1.3); (4) testing of serial interface (subsubsection 2.1.4); (5) fault diagnosis of digital I/O channel (subsubsection 2.2.1); (6) fault diagnosis of digital A/D and D/A channels (subsubsection 2.2.2); (7) fault diagnosis of serial interface (subsubsection 2.2.3); (8) the software for implementing BIT capability (subsection 2.3).We implemented the BIT capability of this specific computer; after more than 3 000 hours of ground and flight testing, the testing success rate reached 96.8%, and mean time between failures (MTBF) increased from 800 hours without BIT capability to 1 200 hours.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2003年第5期580-581,共2页
Journal of Northwestern Polytechnical University
基金
"十.五"国防科工委研究项目 (4 132 5 0 30 1)资助
关键词
BIT
机载计算机
可靠性
可维护性
BIT (Built in Test) capability, airborne computer, ground and flight testing, UAV (unmanned aerial vehicle)
