Title:
EARTH-REFERENCED WIND ADJUSTMENT FOR HOVERING AIRCRAFT
Document Type and Number:
WIPO Patent Application WO1999055582
Kind Code:
A3
Abstract:
In a rotary wing aircraft, longitudinal groundspeed error and lateral groundspeed error are converted to earth coordinates, and the result scaled and integrated, and retransformed into aircraft coordinates for application to a pitch attitude control system and a roll attitude control system. The invention thus instantly transfers wind trim between the longitudinal and lateral channels, whenever a heading change is undertaken
Inventors:
THORNBERG CHRISTOPHER A
COTTON BRYAN S
COTTON BRYAN S
Application Number:
PCT/US1999/007930
Publication Date:
January 06, 2000
Filing Date:
April 13, 1999
Export Citation:
Assignee:
SIKORSKY AIRCRAFT CORP (US)
International Classes:
G05D1/08; B64C27/57; (IPC1-7): G05D1/08; B64C13/18; B64C27/57
Foreign References:
| EP0455580A2 | 1991-11-06 | |||
| US4740899A | 1988-04-26 | |||
| US4213584A | 1980-07-22 | |||
| US5552983A | 1996-09-03 |
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