Design of Coring Dynamics with Shallow Loose Lunar Regolith

Abstract

Based on the unmanned lunar surface sampling return mission of Chang’E-5 drilling subsystem，the coring dynamics of spiral drill in shallow loose lunar regolith were studied by experimental method and FEM. Research results are described as follow： the WOB（Weight Of Bit），which is controlled by drilling parameters，is a key parameter in coring dynamics and can influence the effect of coring； The relationship of powder discharge pressure and core resistance is a key factor controlling the sampling effect of auger. Our results improves our understanding of drilling dynamics, therefore will help the designing drilling system for chang’e-6 and other future deep space explorer project.

Keywords

auger drill / lunar regolith / stress field / FEM / coring dynamics