X射线脉冲星导航在行星际轨道上的应用

Use of X-ray pulsar-based navigation method on interplanetary trajectory

X射线脉冲星导航技术被认为是新一代导航技术,非常适合于行星际探测.深入分析了利用搜索空间方法求解飞行器真实位置和估计位置相位差的脉冲整周期模糊数,解决了相位导航方法存在的周期模糊数问题.利用轨道动力学模型估计飞行器的位置,并以真实位置和估计位置上的脉冲相位之差作为反馈进行偏差校正.仿真表明,X射线脉冲星导航方法在行星际轨道上是可行和高效的.

It is supposed that the X-ray pulsar-based navigation method（XPNAV） can provide high-precision navigation throughout the solar system,and its utility on the heliocentric transfer orbit was discussed.The search space array method was introduced to resolve integer pulse phase cycle ambiguities between the nominal position and estimated position of the spacecraft.A description of blending the vehicle dynamics with the pulse phase differences at nominal and estimated spacecraft locations within an Kalman Filter was provided for recursive determination of vehicle position and velocity.The simulation illustrates that this method is feasible and effective for interplanetary missions.