收稿日期:2025-05-28
修回日期:2025-06-27
接受日期:2025-09-03
出版日期:2025-09-05
发布日期:2025-09-05
通讯作者:
吴姣
E-mail:wn941030@163.com
基金资助:Received:2025-05-28
Revised:2025-06-27
Accepted:2025-09-03
Online:2025-09-05
Published:2025-09-05
Contact:
Jiao WU
E-mail:wn941030@163.com
Supported by:摘要:
针对航天器集群在轨自主导航时全球卫星导航系统(GNSS)短期拒止情况下的导航发散问题,引入航天器间基于数据链(DL)的相对测距系统及神经网络辅助系统,提升拒止期间导航品质。考虑到惯性导航系统(INS)、GNSS及DL系统采样频率不同,构建具有即插即用特点的因子图(FG)架构,并采用置信传播规则动态融合INS/GNSS/DL多源测量信息,实现多航天器协同导航。为避免数据链测距信息解算时的误差放大,设计基于旋转矩阵的相对测距信息解算方法;设计基于惯性积分状态及历史测量残差的复合故障诊断环节,结合因子图即插即用特点,实现GNSS故障及DL故障的检测与隔离;此外,针对GNSS拒止情况,设计广义回归神经网络(GRNN)与Elman神经网络(ENN)组合的辅助系统,对历史时刻GNSS与INS导航数据之间的潜在关系进行拟合,并对缺失GNSS导航数据进行在线预测与补偿。将GNSS预测数据与INS/DL数据进一步融合,获得GNSS拒止情况下的组合导航结果。仿真结果表明,在所设计的基于因子图的协同框架下,组合使用基于数据链的相对测距信息及GRNN-ENN神经网络辅助系统能有效缓解GNSS拒止情况下的导航发散情况。
中图分类号:
刘明, 吴姣. GNSS拒止下神经网络辅助的航天器集群协同导航[J]. 航空学报, doi: 10.7527/S1000-6893.2025.32339.
Ming LIU, Jiao WU. Neural network-assisted cooperative navigation of spacecraft clusters under GNSS denials[J]. Acta Aeronautica et Astronautica Sinica, doi: 10.7527/S1000-6893.2025.32339.
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