First implementation of burrowing motions in dual-reciprocating drilling using an integrated actuation mechanism
| Autor: | Craig Pitcher, Yang Gao |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
020301 aerospace & aeronautics
Atmospheric Science Test bench Tractive force Drill Traction (engineering) Diagonal Aerospace Engineering Drilling Mechanical engineering Astronomy and Astrophysics 02 engineering and technology 01 natural sciences Internal friction Reciprocating motion Geophysics 0203 mechanical engineering Space and Planetary Science 0103 physical sciences General Earth and Planetary Sciences 010303 astronomy & astrophysics Geology |
| Zdroj: | Advances in Space Research. 59:1368-1380 |
| ISSN: | 0273-1177 |
| Popis: | The dual-reciprocating drill (DRD) is a biologically-inspired low-mass alternative to traditional drilling techniques, using backwards-facing teethed halves to grip the surrounding substrate, generating a traction force that reduces the required overhead penetration force. Previous experiments using a proof-of-concept test bench have provided evidence as to the significant role of sideways movements and lateral forces in improving drilling performance. The system is also progressing to a first system prototype concept, in which an actuation mechanism is integrated within the drill heads. To experimentally determine the effect of lateral motions, a new internal actuation mechanism was developed to allow the inclusion of controlled sideways movements, resulting in the creation of the circular and diagonal burrowing motions. This paper presents an investigation into the performance of the reciprocation and burrowing motions by testing them in a planetary regolith simulant. Analysis of force sensor measurements has shown a relationship between the penetration and traction forces and the internal friction of the mechanism and depth achieved. These tests have also experimentally demonstrated the benefit of lateral motions in drilling performance, with both the burrowing mechanisms and drilling tests performed at an angle able to penetrate further than traditional vertical reciprocation, leading to the proposition of new burrowing and diagonal drilling mechanics. From this, a new fully integrated system prototype can be developed which incorporates lateral motions that can optimise the drilling performance. |
| Databáze: | OpenAIRE |
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