“天枢Ⅱ号”X射线脉冲星导航动态模拟系统及实验验证  

Ground test bench for X-ray pulsar navigation dynamic simulation

作　　者：盛立志[1] 郑伟[2] 苏桐[1] 张大鹏[2] 王奕迪[2] 杨向辉 徐能[1] 李治泽 SHENG Lizhi;ZHENG Wei;SU Tong;ZHANG Dapeng;WANG Yidi;YANG Xianghui;XU Neng;LI Zhize(Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi’an 710119,China;College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]中国科学院西安光学精密机械研究所,西安710119 [2]国防科技大学空天科学学院,长沙410073

出　　处：《航空学报》2023年第3期270-280,共11页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(61901470);中国科学院“西部之光”人才计划(XAB2020YN13);强脉冲辐射环境模拟与效应国家重点实验室开放课题(SKLIPR2021)。

摘　　要：X射线脉冲星导航真实运行场景的模拟验证手段尚不够完善,限制了导航和探测理论的发展及工程化应用的实现。提出了基于脉冲星辐射特性和航天器轨道模型的X射线脉冲星动态信号模拟方法,设计了能实现多种实验场景模拟的X射线脉冲星模拟源,并根据脉冲星辐射特性构建了“天枢Ⅱ号”X射线脉冲星导航地面实验系统,可以高质量复现脉冲星导航空间运行场景。设计了静态及动态不同类型的实验对实验系统的性能进行了验证测试,针对PSR B0531+21、PSR B1937+21两颗脉冲星,开展了静态模拟实验,获得的脉冲轮廓相似度分别为99.5%、99.1%;开展了200 km轨道高度的动态近地圆轨模拟实验,PSR B0531+21、PSR B1937+21的周期测试值和理论值的偏差分别为38451、350 ps,还原到SSB(Solar System Barycenter)处的轮廓相似度分别为99.86%、99.99%。实现了椭圆轨道的超实时仿真实验,仿真时长可压缩50%,轮廓相似度为99.89%。实现了基于霍曼变轨模型的轨道机动模拟,周期变化的测试值与理论值的偏差标准差为637 ps。该地面实验系统性能稳定,可以满足不同类型的X射线脉冲星导航模拟实验需求。Theoretical and preliminary experimental studies of X-ray pulsar-based navigation have been carried out at home and abroad,but there are still some defects such as lack of credible experimental verification and imperfect theoretical model.In this paper,a method for simulation of X-ray pulsar dynamic signals is proposed,which can be used to generate the pulsar dynamic signal based on X-ray pulsar properties and the spacecraft orbit model.An X-ray pulsar simulation source and the whole ground test bench are developed.Static and dynamic ground simulation tests are performed.Based on the parameters of the pulsars PSR B0531+21 and PSR B1937+21,the pulse profile similarity obtained with the static simulation test is 99.5%and 99.1%,respectively.Dynamic simulation tests of the two pulsars at the circular orbit height of 200 km are performed.Deviation of the test results and the theory results of the pulse period is 38451 ps and 350 ps and the pulse profile similarity is 99.8%and 99.9%when the timing coordinate transfer to SSB,for PSR B0531+21 and PSR B1937+21,respectively.The test bench system can realize orbit maneuver simulation based on the Hofmann model.The ground experiment system has stable performance and can meet the needs of different types of simulation experiments.

关 键 词：X射线脉冲星导航 动态实验 X射线脉冲源 X射线探测器 半实物验证 

分 类 号：V11[航空宇航科学与技术—人机与环境工程]