航天测控系统中的测速精度分析与鉴定  

Analysis and Evaluation of Speed Measurement Accuracy in Aerospace TT&C System

作　　者：成亚勇[1] 史玉峰 梁志杰 陆峰 CHENG Yayong;SHI Yufeng;LIANG Zhijie;LU Feng(The 54 th Research Institute of CETC,Shijiazhuang 050081,China;State Key Laboratory of Astronautic Dynamics,Tianjin 301900,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]宇航动力国家重点学实验室,天津301900

出　　处：《无线电工程》2025年第1期121-128,共8页Radio Engineering

摘　　要：在航天测控系统中,双向多普勒测速是实现高精度外测的主要体制。为了进一步提升双向多普勒测速的精度,需要对测速误差进行分析与鉴定。针对双向多普勒测速体制中的误差源问题,给出并阐述了发射频率稳定度、接收机本振频率稳定度、热噪声等随机误差,以及信号漂移、多普勒变化率、大气折射等系统误差。对S频段航天测控系统的测速精度进行了误差分析,设计了基于无人机GPS载荷的测速精度鉴定方案,为提升测速精度提供了实践参考。In aerospace TT&C systems,bidirectional Doppler velocimetry is the main system for achieving high-accuracy telemetry.To further improve the accuracy of bidirectional Doppler velocimetry,it is necessary to analyze and identify the speed measurement error of this method.To analyze the error sources in the bidirectional Doppler velocimetry system,random errors such as transmission frequency stability,receiver local oscillator frequency stability,thermal noise,as well as system errors such as signal drift,Doppler rate of change and atmospheric refraction are given and explained.Correspondingly,the error analysis of speed measurement accuracy of S-band space TT&C system is carried out,and a speed measurement accuracy evaluation scheme based on unmanned aerial vehicle GPS payload is designed,providing practical reference for improving the speed measurement accuracy.

关 键 词：多普勒测速 外测 误差分析 误差控制 精度鉴定 

分 类 号：TN914.51[电子电信—通信与信息系统]