Simulate and Model on X-ray pulsar navigation for spacecraft

摘要

X-ray pulsar navigation (XPNAV) is one of the most attractive autonomous navigation methods for spacecraft utilizing accurate timing.The principle,time transfer model and simulation of this navigation method are mentioned in this paper.Extended Kalman filter is also used to estimate vehicle's position and velocity in inertia! frame.Three kinds of X-ray detector schemes are present,as single fixed detector scheme,single servo detector scheme,and multi-detector scheme.The numerical simulations show that the accuracy of the orbit determination using XPNAV is better than 10m,and the single detector servo assembling scheme is more suitable for the future missions and flying experiments according to the navigation accuracy and equipment weight.