摘要
1553B总线协议标准只规定了链路层可靠性机制,缺少应用层面的可靠性指导,而航天器上应用的可靠性设计不严谨易导致总线通讯故障。根据目前多种航天型号的实践基础,提出一套针对总线应用层协议的总线通讯可靠性设计方法。应用层可靠性设计方法制定了总线通讯分类隔离、分时通讯控制、中断响应机制、矢量请求握手机制、通讯实时性策略、数据检错纠错反馈机制等可靠性规范,力图对航天器1553B总线通讯的应用层进行全面的可靠性设计,弥补总线链路层可靠性机制的不足,为航天器总线应用时的可靠性设计提供参考,满足1553B总线通讯实时性、隔离性、信息反馈等可靠性要求。
The 1553 B bus protocol only defines the reliability mechanism of the data link layer,with a lack of the reliability guidance of the application layer.Unprecise design may lead to a bus communication fault of the spacecraft.This paper proposes a reliability design method of bus communication pointing at the application layer of the bus based on the practices of many current space models.The application layer reliability design method defines reliability specifications of the bus communication division,time division commnication control,interrupt response mechanism,vector request holding mechanism,strategy of real time commnication and data error detection and correction mechanism to make an all round reliability design for the application layer of 1553 B bus in spacecrafts,compensate the insufficient of the reliability design of the data link layer,provide a reference of reliability design for the application of 1553 B bus in spacecrafts,and meet the reliability requirements of real time,isolation and information feedback.
出处
《遥测遥控》
2015年第6期51-56,75,共7页
Journal of Telemetry,Tracking and Command
关键词
分时控制
响应机制
消息隔离
握手
信息反馈
Time division control
Response mechanism
Information isolation
Handshake
Information feedback
