某型DFTI总线记录器故障分析及改进  

Fault Analysis and Improvement of a DFTI Recorder

作　　者：杨航[1] 李洪烈[1] 赵冬梅[1] 王倩[1] 王茹意[1] 

机构地区：[1]海军航空工程学院青岛校区,山东青岛266041

出　　处：《电讯技术》2015年第12期1417-1421,共5页Telecommunication Engineering

摘　　要：针对某型数字飞控总线接口(DFTI)记录器发生的断记故障,通过分析定位故障原因,优化了DFTI总线记录器设计,改进同步判断方式,对DFTI解码模块同步头的判断方式由原来的双任务独立判断改为单任务互斥判断;增加对于帧长度出错、帧头识别失败和总线数据通信容错机制,在写入的空闲期确保写使能关闭,保证写使能处于受控状态。试验结果验证了改进方法的有效性和可靠性。According to the analysis of halting execution of a digital flight interface( DFTI) recorder,this paper optimizes the design of DFTI recorder,improves the confidence judgement of bit synchronization,and updates the confidence judgement mechanism from independent mode to mutual exclusion mode. It also adds the fault tolerance mechanism to frame length error and frame flag identification to ensure data writing in control,which means turning off the writing enable signal in the writing free time. Experimental result proves the availability and the reliability of the updating method.

关 键 词：航空设备 飞行参数记录系统 数字飞控总线 记录器设计 故障定位 数据通信 

分 类 号：TN911.4[电子电信—通信与信息系统] V241.07[电子电信—信息与通信工程]