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Record Details

Record 15 of 39024
Motion Perception and Manual Control Performance During Passive Tilt and Translation Following Space Flight
Author and Affiliation:
Clement, Gilles(International Space Univ., Inc., Toulouse, France)
Wood, Scott J.(Universities Space Research Association, Houston, TX, United States)
Abstract: This joint ESA-NASA study is examining changes in motion perception following Space Shuttle flights and the operational implications of post-flight tilt-translation ambiguity for manual control performance. Vibrotactile feedback of tilt orientation is also being evaluated as a countermeasure to improve performance during a closed-loop nulling task. METHODS. Data has been collected on 5 astronaut subjects during 3 preflight sessions and during the first 8 days after Shuttle landings. Variable radius centrifugation (216 deg/s) combined with body translation (12-22 cm, peak-to-peak) is utilized to elicit roll-tilt perception (equivalent to 20 deg, peak-to-peak). A forward-backward moving sled (24-390 cm, peak-to-peak) with or without chair tilting in pitch is utilized to elicit pitch tilt perception (equivalent to 20 deg, peak-to-peak). These combinations are elicited at 0.15, 0.3, and 0.6 Hz for evaluating the effect of motion frequency on tilt-translation ambiguity. In both devices, a closed-loop nulling task is also performed during pseudorandom motion with and without vibrotactile feedback of tilt. All tests are performed in complete darkness. PRELIMINARY RESULTS. Data collection is currently ongoing. Results to date suggest there is a trend for translation motion perception to be increased at the low and medium frequencies on landing day compared to pre-flight. Manual control performance is improved with vibrotactile feedback. DISCUSSION. The results of this study indicate that post-flight recovery of motion perception and manual control performance is complete within 8 days following short-duration space missions. Vibrotactile feedback of tilt improves manual control performance both before and after flight.
Publication Date: Jan 01, 2010
Document ID:
20100011076
(Acquired Mar 22, 2010)
Subject Category: LIFE SCIENCES (GENERAL)
Report/Patent Number: JSC-CN-20064
Document Type: Conference Paper
Meeting Information: ESA Life in Space for Life on Earth Symposium; 13-18 Jun. 2010; Trieste; Italy
Meeting Sponsor: European Space Agency; Paris, France
Financial Sponsor: NASA Johnson Space Center; Houston, TX, United States
Organization Source: Universities Space Research Association; Houston, TX, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ASTRONAUTS; COUNTERMEASURES; MOTION PERCEPTION; MANUAL CONTROL; SPACE SHUTTLES; ATTITUDE (INCLINATION); DATA ACQUISITION; FEEDBACK CONTROL; SPACE TRANSPORTATION SYSTEM FLIGHTS; SEATS; SPACE MISSIONS; LOW FREQUENCIES; FREQUENCY CONVERTERS
Availability Source: Other Sources
Availability Notes: Abstract Only
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