航天器工程2018，Vol.27Issue(2)：54-61,8.DOI:10.3969/j.issn.1673-8748.2018.02.009
航天器多子网时间同步系统设计与验证
Design and Verification of Multi-subnet Time-synchronization System on Spacecraft
摘要
Abstract
In order to ensure navigation accuracy for mission critical phase such as rendezvous, docking,landing,descend, reentry and return of multi-segment multi-subnet deep-space explorer,and to meet subnet time and ground standard time synchronization accuracy require-ments,the typical networking modes and time transmission mechanisms of multi-subnet explorer at home and aboard are studied and analyzed.This paper presents a typical design of time-synchronization system in multi-subnet deep-space explorer,the program uses superior/subordi-nate subnet and peer-to-peer subnet combined topology,the time transmission mechanism is de-signed to ensure the time accuracy.Through theoretical analysis and ground verification test,the correctness of time-synchronization system design is validated,which shows a higher level time accuracy onboard can be maintained over a long time without GPS support.The design has been successfully applied in the development process of a multi-subnet deep space explorer and passed the verification,and can provide a reference for future deep space exploration mission design.关键词
多子网/深空探测器/时间同步系统/上下级子网/对等子网Key words
multi-subnet/deep space explorer/time-synchronization system/superior/subordinate subnet/peer-to-peer subnet分类
航空航天引用本文复制引用
白崇延,邢卓异,张伍,黄昊,朱舜杰..航天器多子网时间同步系统设计与验证[J].航天器工程,2018,27(2):54-61,8.基金项目
国家重大科技专项工程 （）
