Analysis of drill head designs for dual-reciprocating drilling technique in planetary regoliths

Pitcher, C and Gao, Y (2015) Analysis of drill head designs for dual-reciprocating drilling technique in planetary regoliths Advances in Space Research, 56 (8). pp. 1765-1776.

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Abstract

© 2015 COSPAR. The dual-reciprocating drill (DRD) is a biologically-inspired concept which has shown promise in planetary environments, requiring a lower overhead force than traditional rotary drilling techniques. By using two reciprocating backwards-facing teethed halves to grip the surrounding substrate, it generates a traction force that reduces the required overhead penetration force. Research into DRD has focused on the effects of operational and substrate parameters on performance compared to static penetration, with minimal study of the geometrical parameters which define the drill head. This paper presents the exploration of the effects of drill head design on drilling depth and power consumption. Sixteen variations of the original design were tested in planetary regolith simulants up to depths of 800. mm. The experiments showed relationships between final depth, total drill radius and cone shape, though the teeth design had a negligible effect on performance. These results can be used alongside the previous research to optimise the future design and operation of the DRD. Drill stem bending was seen to cause an increase in drilling speed and depth, leading to the exploration of the mechanics of diagonal drilling. This resulted in the proposal of a fully-integrated system prototype that incorporates both reciprocating and lateral motion mechanisms.

Item Type:	Article
Subjects :	Electronic Engineering
Divisions :	Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :	Authors Email ORCID Pitcher, C UNSPECIFIED UNSPECIFIED Gao, Y UNSPECIFIED UNSPECIFIED
Date :	15 July 2015
Identification Number :	https://doi.org/10.1016/j.asr.2015.07.008
Copyright Disclaimer :	© 2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords :	Dual-reciprocating drilling; Planetary drilling; Mars regolith; Slippage
Depositing User :	Symplectic Elements
Date Deposited :	17 Jan 2017 11:27
Last Modified :	17 Jan 2017 11:28
URI:	http://epubs.surrey.ac.uk/id/eprint/813301

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