Robust Control Compensation for Space Descent & Landing *

This paper presents a complete modelling, synthesis and analysis methodology of control compensators for descent and landing on small planetary bodies. These missions are scientifically very rewarding, but also extremely challenging due to the complex and poorly-known environment around those bodies, calling for the ability to manage competing robustness/performance requirements by design. Here, this is achieved using robust control tools and the recently-developed structured $\mathcal{H_{\infty}}$ framework. The proposed method is verified for three distinct landing trajectories on the Martian moon Phobos.