Method and apparatus for the linear real time estimation of an a

Details Method and apparatus for the linear real time estimation of an a Method and apparatus for the linear real time estimation of an a

1995-05-15

1996-11-05

Oda, Christine K.

Measuring and testing

Center of gravity; turning moment; metacentric height

Air or space vehicle

364463, G01M 112

Patent

active

055719538

ABSTRACT:
A method and apparatus for the real time estimation of the location of the center of gravity in an aircraft using a linear estimation technique. The center of gravity estimate is used in the aircraft's flight control system (12) to implement flight control laws that depend on the aircraft's center of gravity. The center of gravity is initially estimated based on signals indicative of the aircraft angle of attack, flap setting, elevator position, and stabilizer position. The initial approximation is then refined by multiplying or dividing the center of gravity estimate by additional factors including the weight of the aircraft, the expected load factor on the aircraft, the dynamic pressure on the aircraft, and the reference wing area of the aircraft. The resulting center of gravity estimate is measured as a percentage of the mean aerodynamic chord (MAC) of the aircraft.

REFERENCES:
patent: 4110605 (1978-08-01), Miller
patent: 4937754 (1990-06-01), Buisson
patent: 5034896 (1991-07-01), Orgun et al.

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