Accession Number:

AD0747732

Title:

The Princeton Pennsylvania Army Avionics Research Program

Descriptive Note:

Final task rept. 1 Sep 1966-30 Jun 1968

Corporate Author:

PRINCETON UNIV NJ

Personal Author(s):

• Graham, Dunstan

Report Date:

1972-03-01

Pagination or Media Count:

42.0

Abstract:

Using the tools of feedback system analysis and simulation a study has been made of the limitations on helicopter approach and landing under conditions of low visibility. It is shown that relatively steep approaches to low decision heights can be made on instruments. Successful loop topologies were identified and considerable improvement over the standard GCA approaches was shown to be possible with a scanning beam system especially if beam rate signals were employed. Errors introduced by turbulence and wind shear were the dominant ones. An automatic approach system could be mechanized using the same signals as the manual approaches which were considered.

Descriptors:

• *HELICOPTERS
• *AIRCRAFT LANDINGS
• *GLIDE PATH SYSTEMS
• MATHEMATICAL MODELS
• PITCH(MOTION)
• RADIO TRANSMISSION
• INSTRUMENT LANDINGS
• GUST LOADS
• RELIABILITY(ELECTRONICS)
• FEEDBACK
• GROUND CONTROLLED APPROACH RADAR

Subject Categories:

• Helicopters
• Air Navigation and Guidance

Distribution Statement:

APPROVED FOR PUBLIC RELEASE