Accurately predicting power consumption of the coring bit is a crucial building block of a lunar sampling mission. The total power consumed by a coring bit consists of two portions: the power consumed by the cutters in drilling soil and the power required to overcome the friction between the soil and the bit body. Based on soil mechanics and the elastic–plastic theory, this paper proposes a model that describes the interaction between the cutter and the soil. Analysis of this model confirms the hypothesis that cutting speed has a minimal effect on the cutting force, especially when cutting speed is low. Based on the assumption that low-speed rotary cutting is similar to linear cutting, cutting force and power consumption are tested experimentally. Results show that power consumed by drilling soil contributes to 70% of the total power consumption, and the power consumed to overcome friction contributes to 30% of the total power consumption.
Drilling Power Consumption Analysis of Coring Bit in Lunar Sample Mission
Journal of Aerospace Engineering ; 30 , 5
24.06.2017
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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