Relative 6-DOF GNC Accuracy Analysis in the Final Phase of HTV-X Automated Docking Mission

—Efficient Monte Carlo Analysis Methods Using Interpolation Functions—

Abstract

In recent years, as the post-ISS and Lunar Gateway have been considered, automated docking technology by a cargo transfer vehicle has been attracting attention. This paper firstly introduces the final approach scenario and guidance, navigation, and control system design of the HTV-X, a cargo transporter to the ISS, for the demonstration mission of automatic docking technology. Then, Monte Carlo analysis clarifies the influence of the final approach and the free drift start points before docking on accuracy at initial contact conditions.