G - Physics – 05 – D
Patent
G - Physics
05
D
341/85
G05D 1/08 (2006.01) G01C 21/18 (2006.01) H01Q 1/18 (2006.01)
Patent
CA 1208339
Abstract A stabilisation aid for a vehicle- or vessel-borne search unit comprises two servomechanisms for stabilising the observation part (3) of the search unit about two mutually perpendicular axes (S1 and S2) mounted on the part of the search unit which rotates about the search axis (1). The stabilisation aid comprises a computer (7) for determining, from the instantaneous angle of inclination (.alpha.) of the platform (2) supporting the search unit with respect to an earth-fixed reference axis and the instantaneous angular position (B) of the search unit about the search axis (1), measured in the plane of said platform (2), input signals for the servomechanisms. A portion of these input signals are compensating signals for the control errors in the servomechanisms, the principal causes of which control errors being the disturbing torques arising through the non-uniformity in the search motion and the rotational velocity of each of the stators with respect to the rotors of the servomechanism motors on their axes.
439128
Fetherstonhaugh & Co.
Thales Nederland B.v.
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