Geometric Control for Autonomous Landing on Asteroid Itokawa using Visual Localization

TL;DR

This paper presents a geometric control approach for autonomous asteroid landing using visual localization, enabling trajectory tracking without complex optimization or sliding mode control, demonstrated on asteroid Itokawa.

Contribution

It introduces a nonlinear geometric control method for coupled orbit and attitude dynamics, utilizing visual odometry for state estimation in asteroid landing.

Findings

Successful simulation of landing on asteroid Itokawa

Avoids complex control and computational methods

Uses monocular vision for state estimation

Abstract

This paper considers the coupled orbit and attitude dynamics of a dumbbell spacecraft around an asteroid. Geometric methods are used to derive the coupled equations of motion, defined on the configuration space of the special Euclidean group, and then a nonlinear controller is designed to enable trajectory tracking of desired landing trajectories. Rather than relying on sliding mode control or optimization based methods, the proposed approach avoids the increased control utilization and computational complexity inherent in other techniques. The nonlinear controller is used to track a desired landing trajectory to the asteroid surface. A monocular imaging sensor is used to provide position and attitude estimates using visual odometry to enable relative state estimates. We demonstrate this control scheme with a landing simulation about asteroid Itokawa.