The Princeton Pennsylvania Army Avionics Research Program
Final task rept. 1 Sep 1966-30 Jun 1968
PRINCETON UNIV NJ
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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.
- Air Navigation and Guidance