부산대학교 도서관

This article investigates the ballistic landing motion and final distribution of the landers in different sizes or shapes near the small celestial body. Three typical shapes, including cubic, cuboid, and cylindrical, are considered for the landers deployed to a tri‐axial ellipsoid model. The Polygonal Contact Model (PCM) is used to detect the contact/collision, where the Hertz model is applied to calculate the continuous contact force. Different‐sized cubic landers (in the edge length of 20, 30, 40, and 50 cm) are numerically simulated to examine how the lander size influences its dynamics. The landing motion of the cuboid‐ and the cylinder‐shaped landers are then analyzed in the same technique. The heights of these asymmetrical landers are assumed to be 25, 30, and 35 cm, respectively, to illustrate the shape effect. Monte Carlo simulations are implemented for various landers to account for the surface motion randomness. The final dispersion, the outgoing velocity after the collision, the horizontal transfer distance, and the settling time are taken to be critical indicators for discussing the landing behavior, which can provide implications for the probe design of future missions. Plain Language Summary: This article studies the ballistic landing characteristics of the landers in different sizes or shapes near a small celestial body. Three typical shapes, that is, cubic, cuboid, and cylindrical, are considered. Parametric simulations of landing motions are made where the lander size/shape is the only variable. The final dispersion, the outgoing velocity angle after the collision, the horizontal transfer distance, and the settling time of the trajectories are summarized as critical indicators for discussion and comparison. The results can be applied as a reference in future lander designs. Key Points: Ballistic landing motions of landers with different sizes and shapes are presented by taking a tri‐axial ellipsoid as the central bodySettling time and transfer distance are compared as the critical indicators, which provide a reference for the future lander designMonte Carlo simulations are performed for different kinds of landers to account for the stochastic surface motion [ABSTRACT FROM AUTHOR]