An efficient impact sampling strategy for small-body regolith: Dependence of collected mass on projectile ejection

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-02-14 DOI:10.1016/j.powtec.2025.120798

Yang Wang , Wei Guan , Yan Wang

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引用次数: 0

Abstract

Impact sampling on small bodies has been proven feasible. However, particle flow laws during regolith sampling are unclear, and existing sampling mechanisms have significant potential for improvement. In this study, the discrete element method and multi-body dynamics (DEM-MBD) coupling model is used to explore the particle flow laws, and an efficient impact sampling strategy is developed which can significantly improve the collected particle mass. Two projectiles are placed symmetrically around the end of the sampler and fired simultaneously. In the event that only one projectile is successfully fired, the collected mass is still 7.9 times higher than that of existing sampling method. As particles accumulate near the transporting pipe, a clogging state occurs and obstructs the particle flow, causing the mass flow rate to drop rapidly. Particle clogging can be effectively reduced using a sampling strategy in which the probe reaches the target position and then fires the projectiles. We show that the particle-probe interaction can interfere with position and attitude of the probe and eventually reduce the collected mass of particles. To solve this problem, a proportional derivative (PD) controller is designed to stabilize the attitude and position of the probe. An ejection angle of 54° can significantly improve the sampling efficiency by balancing the number of driven particles and vertical velocity, and the particle mass obtained is 31 times higher than that of the existing method.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.