Go to the NASA Homepage
Search >
Click to Search
Human Systems Integration Division homepageHuman Systems Integration Division homepage Organization pageOrganization page Technical Areas pageTechnical Areas page Outreach and Publications pageOutreach and Publications page Contact pageContact page
Human Systems Integration Division Homepage
Outreach & Publications Sidebar Header
Go to the Outreach & Publications pageGo to the Outreach & Publications page
Go to Awards pageGo to Awards page
Go to News pageGo to News page
Go to Factsheets pageGo to Factsheets page
Go to Multimedia pageGo to Multimedia page
Go to Human Factors 101 pageGo to Human Factors 101 page
What is Human System Integration? Website
Publication Header
Effects of Visual Spatio-Temporal Aliasing on Pilot Performance in Active Control Tasks  (2010)
Abstract Header
Visual display systems such as the out-the-window or head-down displays of a simulator present a visual scene that is sampled in both the spatial domain (by the display resolution) and the time domain (by the display refresh rate). For a given human visual temporal sensitivity, spatial-frequency content of the scene, and speed of the image motion, spatiotemporal aliasing can occur when the image is sampled at a rate that is too low. The effects of spatio-temporal aliasing on visual perception are understood to some extend. However, not much is known about the effects on pilot performance in active control tasks. This paper presents the results of an experiment to determine the effects of spatio-temporal aliasing on pilot performance and control behavior in a target-tracking task. To induce different levels of spatio-temporal aliasing, the refresh rate of the experimental display was varied among five different levels. The results indicate that pilots adopt a different control strategy when the display refresh rate is increased from 60 to 120 Hz. The visual gain and neuromuscular frequency of the identified pilot model increase, while the visual time delay decreases. This change in control strategy allows for a higher tracking performance at higher display refresh rates as indicated by a decrease in root mean square of the error signal and an increase in crossover frequency.
Private Investigators Header
Authors Header
Groups Header
Keywords Header
Active, Aliasing, Control, Effects, Performance, Pilot, Spatio-Temporal, Tasks, Visual
References Header
AIAA Modeling and Simulation Technologies Conference 2 - 5 August 2010, Toronto, Ontario Canada
Download Header
Adobe PDF Icon  AIAA2013.VisSTA.pdf (Download Acrobat Reader Click to download Adobe Acrabat Reader)
  (318KB) (application/pdf)
Go to the First Gov Homepage
Go to the NASA - National Aeronautics and Space Administration Homepage
Curator: Phil So
NASA Official: Alonso Vera
Last Updated: August 15, 2019