基于数字多波束的返回器捕获算法

Capture Algorithm for Reentry Capsules Based on Digital Multi-beam

返回器出黑障后可见弧度段短,对航天测控系统的快速捕获目标能力提出很高要求。针对该问题,提出了基于数字多波束的检测算法:波束形成器形成多个波束,不同波束在对应空域同时检测测控信号,当检测到信号后多波束再同时验证检测结果,把多路采集的信号合并成一组数据以进行相关性检测,进一步对检测概率及虚警概率性能进行了计算机仿真。仿真结果表明,所提方法能够以较低的成本代价,缩短检测时间并提高捕获概率,满足返回器快速捕获需求。

The visible period of reentry capsule is short after getting out of the blackout area,which requires the fast target capture capability of the spacecraft TTC system. To address the challenge,a detection algorithm based on digital multi-beam is proposed. The different beams formed by the beam former detect the TTC signals simultaneously in the corresponding regions. When the signals are detected,the multiple beams validate the results simultaneously,and the multi-channel signals are combined into a set of data for correlation detection. A computational simulation is further carried out to verify the detection probability and false alarm probability performance. The results show that the proposed method can shorten the detection time and improve the detection probability obviously with lower cost,meeting the requirements for fast capture of reentry capsule.