脉冲星导航周期跃变自主监测

X-ray pulsar navigation is one of the most promising technologies for spacecraft to achieve long-term, high-precision and autonomous navigation. However, the natural phenomenon of glitch poses a serious threat to such long-term autonomous pulsar navigation. In order to guarantee the reliability of pulsar navigation, we need to carry out the research of glitch and recovery revolution model, glitch error transition model, pulsar observation information consistency check technology, filter observation data fading processing technology, and observation strategy based on pulsar monitoring. This research will realize the automatically monitoring of pulsar glitch and ensures the reliability of the pulsar navigation autonomous operation.

X射线脉冲星导航是实现航天器长时间高精度自主导航最有希望取得突破的技术，已成为航天领域研究热点之一。然而，周期跃变这一自然现象却对脉冲星导航长期自主运行产生了严重威胁。为保障脉冲星导航结果的可靠性，需要开展周期跃变与恢复变化模型、周期跃变故障传递模型、脉冲星观测信息一致性比对技术、滤波器观测数据渐消处理技术研究、基于脉冲星完好性自主监测的观测策略等领域的研究，实现脉冲星周期跃变星上自主监测，确保脉冲星导航自主运行的可靠性。

本课题针对脉冲星导航完好性保障为目标，开展了开展了周期跃变与恢复变化模型、周期跃变故障传递模型、脉冲星观测信息一致性比对技术的研究、基于脉冲星完好性自主监测的观测策略等领域的研究，通过滤波器新息假设检验实现了周期跃变自主监测。课题构建了实测数据驱动的仿真平台，基于XPNAV-1的实测数据与部分仿真数据对提出的算法进行了检验，结果表明本课题能够在脉冲星周期跃变情况下确保脉冲星导航结果完好性。