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National Aeronautics and Space Administration
Washington, DC 20546-0001
548-40-12
84
A05
Helicopter Flight Simulation Motion Platform Requirements
Jeffery Allyn Schroeder
To determine motion fidelity requirements, a series of piloted simulations was performed. Several
key results were found. First, lateral and vertical translational platform cues had significant effects on fidelity.
Their presence improved performance and reduced pilot workload. Second, yaw and roll rotational platform
cues were not as important as the translational platform cues. In particular, the yaw rotational motion platform
cue did not appear at all useful in improving performance or reducing workload. Third, when the lateral
translational platform cue was combined with visual yaw rotational cues, pilots believed the platform was
rotating when it was not. Thus, simulator systems can be made more efficient by proper combination of
platform and visual cues. Fourth, motion fidelity specifications were revised that now provide simulator users
with a better prediction of motion fidelity based upon the frequency responses of their motion control laws.
Fifth, vertical platform motion affected pilot estimates of steady-state altitude during altitude repositionings.
Finally, the combined results led to a general method for configuring helicopter motion systems and for
developing simulator tasks that more likely represent actual flight. The overall results can serve as a guide to
future simulator designers and to today’s operators.
Flight simulation, Helicopters, Motion platforms
Technical Publication
Point of Contact: Jeffery Allyn Schroeder, Ames Research Center, MS 262-2, Moffett Field, CA 94035-1000
(650) 604-4037

　
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