The Verification of a Computer Model of Internal Light Reflections for Helicopter Canopy Design

The US Army Human Engineering Laboratory (USAHEL) has experimentally verified a computer model for internal light reflections on the transparent surfaces of helicopter canopies. The model was verified using a mockup of the Model 209 AH-1S Helicopter with the flat plate canopy design. The transmittan...

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Bibliographic Details
Main Authors: Smyth,Christopher C, Stowell,Harry R
Format: Report
Language:English
Subjects:
AH-1S aircraft
AIRCRAFT CANOPIES
COMPUTER PROGRAMS
COMPUTERIZED SIMULATION
COORDINATES
CORRELATION TECHNIQUES
ELECTROMAGNETIC WAVE REFLECTIONS
Helicopters
INTERNAL
LIGHT SOURCES
LINEAR REGRESSION ANALYSIS
LUMINANCE
MEASUREMENT
OPTICAL IMAGES
Optics
TRANSMITTANCE
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Summary:The US Army Human Engineering Laboratory (USAHEL) has experimentally verified a computer model for internal light reflections on the transparent surfaces of helicopter canopies. The model was verified using a mockup of the Model 209 AH-1S Helicopter with the flat plate canopy design. The transmittance and coordinates of the light images on the canopy surfaces were measured at various light source positions. A matched sample was computed for the source positions using the computer model. Pearson's correlation coefficients for a linear regression analysis of the matched measured and computed values are greater than 0.98, and the results are statistically significant at the .01 level. (Author)