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Space Suit Simulator (S3) for Partial Gravity EVA Experimentation and Training

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
Program Year/Program:
2011 / SBIR
Agency Tracking Number:
094247
Solicitation Year:
2009
Solicitation Topic Code:
X11.02
Solicitation Number:
Small Business Information
Aurora Flight Sciences Corporation
9950 Wakeman Drive Manassas, VA -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 2011
Title: Space Suit Simulator (S3) for Partial Gravity EVA Experimentation and Training
Agency: NASA
Contract: NNX11CA74C
Award Amount: $599,885.00
 

Abstract:

Pressurized space suits impose high joint torques on the wearer, reducing mobility for upper and lower body motions. Using actual space suits in training or experimentation is problematic due to the expense, bulk, weight, and difficulty in donning/doffing. The goal of this project was to demonstrate a novel method for simulating space suit joint torques, which are non-linear and vary with angular position. We designed a knee joint simulator using McKibben actuators with active control (also known as artificial muscles), which are cylindrical pneumatic actuators constructed of flexible rubber with an inextensible weave that causes the cylinder to contract longitudinally when pressurized. A commercial knee brace was used as an exoskeleton to mount the actuators. One actuator was mounted anterior to the knee to provide resistance to flexion, and a second actuator was mounted posterior to the knee to provide resistance to extension. The active controller read angle input from a potentiometer mounted to the brace and output the appropriate pressures for each actuator to provide the needed torque. The knee joint was installed on MIT's Robotic Space Suit Tester (RSST), a full-sized anthropometric robot equipped with torque and angle sensors on each of the joints. Results from testing indicated that the torque vs. angle relationship achieved using the actively controlled spacesuit joint simulator was qualitatively similar to the non-linear trend observed in prior testing of the EMU on the RSST. We conclude that the use of these actuators potentially results in higher fidelity than passive actuation.

Principal Investigator:

Jessica Duda
Principal Investigator
6175000552
jduda@aurora.aero

Business Contact:

Scott Hart
Financial Analyst
6176170536
shart@aurora.aero
Small Business Information at Submission:

Aurora Flight Sciences Corporation
9950 Wakeman Drive Manassas, VA -

EIN/Tax ID: 541502935
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No