Automatic heading control system for tiltrotor aircraft and...

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Aeronautical vehicle

Reexamination Certificate

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C244S011000

Reexamination Certificate

active

07617024

ABSTRACT:
One embodiment of the present invention is a method for automatically reducing the effect of a component of an external force that is laterally incident on a rotorcraft. A signal of the rotorcraft indicative of and proportional to the component is monitored. An absolute value of the signal and a preset high limit are compared. If the absolute value is greater than the preset high limit, manual heading control of the rotorcraft is disabled and the heading of the rotorcraft is adjusted with respect to the external force so as to decrease the lateral component of the external force experienced by the rotorcraft.

REFERENCES:
patent: 3103329 (1963-09-01), Unger et al.
patent: 4999782 (1991-03-01), BeVan
patent: 5178307 (1993-01-01), Wright et al.
patent: 5224664 (1993-07-01), Adams, Sr.
patent: 5738300 (1998-04-01), Durand
patent: 6059226 (2000-05-01), Cotton
patent: 6256975 (2001-07-01), Dobbeling et al.
patent: 2003/0066926 (2003-04-01), Salesse-Lavergne
International Search Report issued in PCT/US2007/078703, May 8, 2008, 4 pages.
Written Opintion of the International Searching Authority issued in PCT/US2007/078703, May 8, 2008, 6 pages.

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