基于光学/脉冲星的木星探测转移段自主组合导航

提出一种基于光学/X脉冲星的木星探测器转移段自主组合导航方案。该方案在探测器转移段动力学模型的基础上,以地球、火星、木星、木星卫星以及X射线脉冲星作为观测目标,从待观测目标的几何分布、视星等以及导航精度几个方面,分析光学自主导航待观测目标的可观测条件和可观测度,优化选取最优的光学观测目标;结合X射线脉冲星观测信息,构建光学/X射线脉冲星组合导航方案;结合无迹卡尔曼滤波算法,应用于木星探测转移段,实现探测器位置和速度估计。从数学仿真结果来看,该组合导航方案状态估计精度显著优于单独使用光学导航或者X脉冲星导航系统。

Autonomous Integrated Navigation for Jupiter Probe Transfer Phase Based on Optical / Pulsar

An autonomous integrated navigation scheme based on the optical / X-ray pulsar navigation system for the Jupiter probe transfer phase is proposed. Based on the dynamic model of the probe transfer phase, the system uses the Earth, the Mars, the Jupiter, the Jupiter satellites, and X-ray pulsars as the observation targets. From the analyses of the geometric distribution and the apparent magnitude of the observed targets and the navigation accuracy, the observable conditions and the observability degree of the optical autonomous navigation targets are analyzed, and the optical targets are optimized and selected. Combined with the X-ray pulsar observation information, an integrated optical / X-ray pulsar navigation scheme is constructed. Based on the unscented Kalman filter algorithm, the scheme is applied to the Jupiter probe transfer phase to estimate the position and velocity of the probe. The simulation results show that, the state estimation accuracy of the integrated navigation scheme is significantly better than that of the optical navigation system or the X-ray pulse navigation system alone.