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Paper WeD06.6

Parness, Aaron (Nasa Jet Propulsion Laboratory), Frost, Matthew (NASA Jet Propulsion Laboratory), Thatte, Nitish (Rutgers University), King, Jonathan (The Ohio State University)

Gravity-Independent Mobility and Drilling on Natural Rock Using Microspines

Scheduled for presentation during the Regular Session "Space Robotics" (WeD06), Wednesday, May 16, 2012, 17:45−18:00, Meeting Room 6 (Oya'te)

2012 IEEE International Conference on Robotics and Automation, May 14-18, 2012, RiverCentre, Saint Paul, Minnesota, USA

This information is tentative and subject to change. Compiled on June 19, 2018

Keywords Space Exploration Rover, Climbing Robots, Mechanism Design of Mobile Robots

Abstract

To grip rocks on the surfaces of asteroids and comets, and to grip the cliff faces and lava tubes of Mars, a 250 mm diameter omni-directional anchor is presented that utilizes a hierarchical array of claws with suspension flexures, called microspines, to create fast, strong attachment. Prototypes have been demonstrated on vesicular basalt and aa lava rock supporting forces in all directions away from the rock. Each anchor can support >160 N tangent, >150 N at 45, and >180 N normal to the surface of the rock. A two-actuator selectively-compliant ankle interfaces these anchors to the Lemur IIB robot for climbing trials. A rotary percussive drill was also integrated into the anchor, demonstrating self-contained rock coring regardless of gravitational orientation. As a harder-than-zero-g proof of concept, 20mm diameter boreholes were drilled 83 mm deep in vesicular basalt samples, retaining a 12 mm diameter rock core in 3-6 pieces while in an inverted configuration, literally drilling into the ceiling.

 

 

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