| 摘要: |
| 针对深空探测任务的遥测帧同步问题，结合深空测控设备帧同步器实际参数结构，推导了平均正确入锁时间解析式。根据深空任务重要阶段中器地通信时长短的特殊需求，提出了采用数据有效处理时间占比的数据有效率定义和计算方法，用于计算帧同步器在不同链路通信时长下的综合性能。分析了平均正确入锁时间和数据有效率两项指标的特点和不足，提出通过设定数据有效率阈值再由平均正确入锁时间选优的参数设计方法。最后，根据首次火星探测“天问一号”任务链路条件，给出了最佳帧同步参数，结果表明参数在我国深空站应用效果良好，方法有效。 |
| 关键词: 火星探测 “天问一号” 遥测帧同步参数 正确入锁时间 数据有效率 |
| DOI：10.20079/j.issn.1001-893x.211108001 |
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| 基金项目: |
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| Parameter design for telemetry frame synchronization in the first Mars exploration mission |
| LIU Jun,QIANG Li,ZHANG Wei,WU Zongqing,LU Ouxin |
| (1.Xi’an Satellite Control Center,Xi’an 710043,China;2.State Key Laboratory of Astronautic Dyanmics,Xi’an 710043,China;1.Xi’an Satellite Control Center,Xi’an 710043,China;2.State Key Laboratory of Astronautic Dyanmics,Xi’an 710043,China;
3.School of Aeronautics and Astronautics,Zhejiang University,Hangzhou 310027,China;Southwest China Institute of Electronic Technology,Chengdu 610036，China) |
| Abstract: |
| In order to solve the problem of telemetry frame synchronization in deep space exploration,the analysis formula of average time of correct locking(ATCL) is derived based on frame synchronizer parameter structure of deep space TT&C system.According to the special demand for short communication duration in important stage of deep space detection,the concept of data efficiency is put forward for calculating combination performance of various communication times,which is defined by proportion of effective processing time.The features and deficiencies of ATCL and data efficiency analysis are completed,which contributes to proposing the method of parameter design based on threshold of data efficiency and ATCL.Finally,the best parameters of frame synchronizer with communication link conditions of the first Mars Exploration Mission(Tianwen-1) are provided.The effect of the method is proved by the application results in China’s deep space TT&C station. |
| Key words: Mars exploration Tianwen-1 telemetry frame synchronization parameter time of correct locking data efficiency |
