Abstract
The environment of the moon is severe for sample drilling missions. To ensure mission success, it is necessary to carry out sufficient simulation research on the sampling conditions on Earth. Accordingly, a drill-soil interaction model was proposed, based on a virtual soil pile method. By considering the interaction relationship between the drill and soil with a boundary condition and an equilibrium equation, the dynamic equilibrium equation of the drill was solved, and a solution was obtained for the drill-soil system. The drill and soil parameters affecting the velocity-frequency response were analyzed. The data were verified using impact experiments on simulant lunar soil. The velocity-frequency response data were obtained via testing; they were used to verify the simulation results for the drill. When the thickness of the homogeneous lunar simulant soil increased, the impact energy absorbing ability increased. When the density of the homogeneous simulant lunar soil increased, the impact absorbing ability decreased. The research results provide a theoretical basis for identifying the mechanical parameters of lunar soil based on drill vibration feedback signals.
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