Enabling Large-body Active Debris Removal

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$124,960.00
Award Year:
2012
Program:
STTR
Phase:
Phase I
Contract:
NNX12CG24P
Award Id:
n/a
Agency Tracking Number:
110120
Solicitation Year:
2011
Solicitation Topic Code:
T6.02
Solicitation Number:
n/a
Small Business Information
TX, Richardson, TX, 75081-2897
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
831976944
Principal Investigator:
John Junkins
Principal Investigator
(979) 845-3912
junkins@tamu.edu
Business Contact:
Jeremy Davis
Business Official
(512) 772-3615
davis@vectornav.com
Research Institution:
Texas Engineering Experiment Station/Texas A&M University
John Junkins
3141 TAMU
College Station, TX, 77845-3141
() -
Domestic nonprofit research organization
Abstract
Research suggests that: (1) orbital debris has reached an unstable point whereby, even with no future launches, the amount of debris will continue to grow through collisions among large-body debris, and (2) removing as few as five large objects each year can stabilize debris growth. For large-body active debris removal (ADR), active technologies are required to safely and efficiently stabilize and capture the target debris. The interactions of these complex electromechanical systems (eg. imaging systems, LIDAR, robotic arms and grippers, etc) and control algorithms pose challenges best addressed by hardware-in-the-loop testing. Given the risks inherent in non-cooperative spacecraft proximity operations, and the firm requirement that ADR missions do not themselves produce additional debris, realistic ground-based testing is required for risk reduction. Testing space operations in ground-based facilities is notoriously difficult and limited. Our proposed approach significantly increases the capability and fidelity of such testing operations and elevates the chance of a successful ADR mission. We propose a combination of robotic technologies to allow for a large range of relative motion simulation with accurate contact dynamics. First, the target debris object is suspended from a thin rod and spun up to a desired rotational speed. The suspension point is actively controlled to remove the periodic pendulum effect while still allowing free motion from contact, and a universal joint permits free rotational motion. Second, the chaser spacecraft is mounted atop HOMER, an omnidirectional robot capable of unlimited planar motion and limited-range out-of-plane motion. HOMER was designed and built by Texas A & M to emulate the 6-DOF relative-motion trajectories common in spacecraft proximity operations. Along with careful attention paid to the design of mock-targets, these two systems will allow for large-scale motion with accurate contact dynamics for high-fidelity ADR testing.

* information listed above is at the time of submission.

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