Aeronautics and astronautics – Aircraft – heavier-than-air – Helicopter or auto-rotating wing sustained – i.e. – gyroplanes
Patent
1995-12-06
1997-10-21
Kashnikow, Andres
Aeronautics and astronautics
Aircraft, heavier-than-air
Helicopter or auto-rotating wing sustained, i.e., gyroplanes
244 1725, 244177, 244195, 416114, B64C 1144, B64C 27605, G05D 110, F03B 314
Patent
active
056787863
ABSTRACT:
A failure of any one of three swashplate actuators of a helicopter rotor blade is detected. Once such a detection is made, the position of this nonfunctional swashplate is locked and measured. The inputted commanded swashplate collective position, commanded swashplate x-axis rotational position, and commanded swashplate y-axis rotational position are then passed to a failure-mode control matrix. The failure-mode control matrix computes swashplate actuator commanded positions for the two operable swashplate actuators so that aircraft attitude control is maintained. These two swashplate actuator commanded positions instruct positional movement of the rotor blade swashplate to thereby meet the commanded swashplate x-axis rotational position and the commanded swashplate y-axis rotational position which will control attitude. A quasi-swashplate-collective-position corrector computes the quasi-swashplate collective position that will occur because of the successful control of the aircraft's attitude. The swashplate-collective-position corrector then generates an amount of rotor blade lift attainable with a computed rotor blade speed change to compensate for any difference between the commanded swashplate collective position and the quasi-swashplate collective position. A closed loop vertical velocity controller refines the predicted rotor speed change that is commanded to correct for the loss of collective control.
REFERENCES:
patent: 3679156 (1972-07-01), Redmond, Jr.
patent: 4243358 (1981-01-01), Carlock et al.
patent: 4274808 (1981-06-01), Garner et al.
patent: 4362085 (1982-12-01), Venuti, Jr.
patent: 4460964 (1984-07-01), Skutecki et al.
patent: 4528628 (1985-07-01), Fischer et al.
patent: 4601169 (1986-07-01), Hesse et al.
patent: 4899641 (1990-02-01), Khan
patent: 4930988 (1990-06-01), Griffith
patent: 5001646 (1991-03-01), Caldwell et al.
patent: 5012423 (1991-04-01), Osder
patent: 5141177 (1992-08-01), Wright et al.
Kashnikow Andres
McDonnell Douglas Helicopter Co.
Mojica Virna Lissi
Stout Donald E.
LandOfFree
Reconfigurable helicopter flight control system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reconfigurable helicopter flight control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reconfigurable helicopter flight control system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1000715