船载时间统一系统B码终端时间异常问题研究与改进
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引用本文:毛江锟?覮,刘洪源.船载时间统一系统B码终端时间异常问题研究与改进[J].计算技术与自动化,2019,(3):39-42
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毛江锟?覮,刘洪源 (中国卫星海上测控部江苏 江阴 214400) 
中文摘要:针对船载时间统一系统B码终端时间异常问题,深入分析监控软件设置调制比及输出时区原理,建立FTA故障树分析模型,分析故障底事件,定位了B码终端时间异常问题的故障部位是监控软件。为了解决该问题,对监控软件代码进行分析,进一步精确定位了B码终端时间异常问题的原因是监控软件中B(AC)码调制比设置函数存在缺陷,修改监控软件设置函数,使其符合了时间统一设备内部通信协议。通过对改进后的软件进行测试表明,监控软件设置B(AC)码调制比后设备输出时区不再发生跳变,从而有效解决了B码终端时间异常问题。
中文关键词:船载  时间统一  B码终端  时区  FTA  异常
 
Research and Improvement of B Code Terminal Time Anomaly Problem for Timing System on Ship
Abstract:For the problem of B code terminal time anomaly of timing system on ship,the principle of monitoring software setting up modulation ratio and output time zone is deeply analyzed,the FTA is established,and the bottom event is analyzed,which locate the fault location of B code terminal time abnormality is monitoring software. In order to solve the problem,analysis the monitoring software code,further locate the reason of B code terminal time anomaly problem is having a defect in the B(AC) code modulation ratio setting function in the monitoring software. After modifying the monitoring software setting function,it conforms to the internal communication protocol of the timing equipment. Through the test of the improved software,it shows that the equipment output time zone is no longer hopping,after setting the B(AC) code modulation ratio of monitoring software,it effectively solves the problem of B code terminal time anomaly.
keywords:ship  timing system  B code terminal  time zone  FTA (fault tree analysis)  abnormality
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