Repeat the steps; IBR realizes the function of continued drilling into the regolith. In Steps 2 and 4, the IBR is mainly focused on excavating forward and discharging the cuttings.
According to the components of IBR, two augers, EA (excavating auger) and DA (discharging auger), were used to remove the cuttings produced by the breaking of regolith or rocks by the DH (drill head).
(ii) The regolith is relatively compact compared with the cuttings; its bulk density is [[rho].sub.1].
In the excavating mode, DH breaks the original regolith into cuttings and these cuttings are then conveyed to the storage room by EA with the rotary and penetrating motion.
As can be seen in Figure 4(a), [[PHI].sub.11] is the mass flow rate of the chips from the original regolith to the flow channel in EA.
Therefore, it is necessary to analyze the stress of the regolith in the storage room and then give the obstructive stress acting on the top of EA flow channel.
[[rho].sub.s] is the granular density of regolith. [A.sub.p] and [B.sub.p] are the unknown coefficients that need to be determined by the confined compression test.
In the process of preparation, the raw material was steeply poured into the container and vibrated for the regolith simulant with consistent mechanical property along the height direction.
Banaszkiewicz et al., "Determining the geotechnical properties of planetary regolith using low velocity penetrometers," Planetary & Space Science, vol.
Jiang et al., "Design of a screw-cone drill for lunar regolith drilling mission," Journal of Astronautics, vol.