PENETRATION DYNAMICS OF ASTEROID EXPLORATION LANDING BASED ON DEM

Asteroid exploration is one of the hot areas of deep space exploration in recent years. In this paper, a landing attachment system for asteroid landing detection is proposed, which can complete the landing and attachment of the lander on the asteroid surface. Based on the discrete element method, this paper analyzes the landing impact and penetration dynamics in the process of land penetration. In this paper, the triaxial compression performance of simulated lunar soil is tested, and the physical and mechanical parameters of simulated lunar soil are studied, so as to realize the parameter matching between meso parameters of bulk medium and macro mechanical properties of soil. The penetration process of the detached body is studied. The penetration characteristics under different incident angles, velocities and shapes of the spear body are studied. The characteristics of the depth, velocity and acceleration of the anchor body with time are obtained. The landing impact dynamic characteristics of the anchoring device are obtained. This study provides a new analysis method for the study of asteroid detection anchoring and attachment, and has reference significance for the design of asteroid and other planetary landing and attachment detection.