GPS/SINS组合系统时间同步误差的分析与验证

基金项目: 国家航空管理委员会科研资助项目(GKG200702021)

详细信息

Analysis and Verification of Time Synchronization Error in GPS/SINS Integrated System

¹School of Instrumentation and Optoelectronics Engineering,Beihang University,37 Xueyuan Road,Beijing 100191,China;²School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China

Funds: 国家航空管理委员会科研资助项目(GKG200702021)

摘要: 用示波器测量了Novatel SuperstarⅡGPS接收机串口输出的导航数据相对于1 pps的时间延迟,并以此估算出该接收机用于组合导航时时间同步误差的取值范围应为0.6~1.6 s。使用该接收机与某现役机载SINS构成组合系统进行了跑车实验。实验结果表明,根据跑车数据拟合出的GPS/SINS组合系统的时间同步误差约为1.1 s,说明本方法对时间同步概念的描述是符合实际的。
- GPS/SINS /
- 组合系统 /
- 时间同步 /
- 物理概念 /
- 实验验证
Abstract: Aiming at the fact that many researchers did not understand the concept of GPS/SINS time synchronization clearly,understanding of time synchronization was proposed.Firstly,time delay of serial navigation data relative to 1 pps of Novatel GPS receiver was measured by an oscillograph,based on which time synchronization error of GPS/SINS integrated system including this GPS receiver was estimated,which was between 0.6 s and 1.6 s.Then,a vehicle experiment was accomplished with an integrated system comprised of this receiver and a military airborne SINS.Experiment results showed that time synchronization error fitted with vehicle experiment data was about 1.1 s,which illustrated that the description on the concept of GPS/SINS integrated system time synchronization in this paper is practical.
- GPS/SINS /
- integrated system /
- time synchronization /
- physical concept /
- experimental demonstration