基于双臂螺旋天线的箭载天基遥测系统设计  

Design of Space-based Telemetry System Based on Two-arm Spiral Antenna

作　　者：王健 Wang Jian(Oriental Space Technology Beijing Co.,LTD.,Beijing 100010,China)

机构地区：[1]东方空间技术北京有限公司,北京100010

出　　处：《航天控制》2023年第4期54-58,共5页Aerospace Control

摘　　要：为满足运载火箭轨道作业段遥测全帧码流中有效载荷姿态、冲击、速率等关键信息参数的挑路、帧重构及传输的需求,提出了一种基于双臂螺旋天线的箭载天基遥测系统设计。本文在通过COMSOL仿真软件对系统双臂螺旋天线在轴向工作模式下的散射参数(Scatter参数,S参数)和远场辐射方向图进行电磁波、频域及重力场耦合仿真分析的基础上,选择了385 MHz、4.77 GHz频段作为主、备份频段进行天基遥测数据的传输,最后在整箭模拟飞行测试中进行了天基遥测系统空间衰减等效实验。实验结果表明,地面天基检测站“捕获”、“载波”、“帧同步”、“符号同步”功能正确,精准完成了箭载天基遥测系统状态锁定,近地轨道处遥测数据传输速率稳定保持在1.2 Mbps,系统链路余量充裕,与现有系统相比同等条件下的箭地通信速率提升比至少达到了76%。In order to meet the requirements of route selection,frame reconstruction and transmission of key information parameters such as attitude,impact and velocity of payload in the full frame code stream of launch vehicle orbit,a space-based telemetry system based on two-arm spiral antenna is proposed.In this paper,on the basis of the coupling simulation analysis of electromagnetic wave,frequency domain and gravity field of the two-armed helical antenna based on scatter parameters and S parameters and far-field radiation direction map under axial working mode by COMSOL simulation software,The 4.77 GHz and 385 MHz frequency bands are selected as the primary and backup frequency bands for the transmission of space-based telemetry data.Finally,the space attenuation equivalent experiment of space-based telemetry system is implemented in the simulation flight test of the whole arrow.The experimental results show that the ground-based space-based detection station has the correct functions of"capture","carrier","frame synchronization"and"symbol synchronization",and accurately completes the state locking of the space-based telemetry system.The transmission rate of telemetry data in low-Earth orbit is stable at 1.2 Mbps,and the system link margin is sufficient.Compared with the existing system,the launch vehicle-ground communication rate is increased by at least 76% under the same conditions.

关 键 词：双臂螺旋天线 天基遥测系统 散射参数 基带终端 箭地通信 

分 类 号：V556[航空宇航科学与技术—人机与环境工程]