F - Mech Eng,Light,Heat,Weapons – 41 – G
Patent
F - Mech Eng,Light,Heat,Weapons
41
G
F41G 7/22 (2006.01) F41G 7/00 (2006.01) G05D 1/12 (2006.01)
Patent
CA 2135362
ABSTRACT Output signals from a seeker head rigidly mounted on the missile are used to make a gimbal suspended and gyro- stabilized virtual seeker head track the line of sight. The virtual seeker head represents the mathematical model of a gimbal mounted and gyrostabilized seeker head in the computer. The virtual seeker head's follow-up simulation taking place at the same time as the motion of the missile permits determination of the rate of turn of the missile/target line of sight. Azimuth and elevation deviation angles of the target, measured in the rigid seeker head, are converted to the azimuth and elevation deviation angles of the virtual seeker head. The virtual seeker head tracks the line of sight with a first-order (or higher) time response. The motions of the virtual seeker head calculated by the software yield the rates of turn of the virtual seeker head in the inertial system or, with earth-fixed application, in the geodetic system which enter the guidance algorithm. From the rates of turn of the virtual seeker head one also determines the particular attitude angles of the virtual seeker head, i.e. its angular position in the inertial system, this is required for converting the attitude angles from the rigid to the virtual seeker head. The missile follows the guidance commands, changing its position and attitude, which in turn changes the deviation angles in the rigid seeker head. These angles are converted to the virtual seeker head again. This closes the loop.
Mafo Systemtechnik Dr.-Ing. A. Zacharias Gmbh & Co. Kg
Smart & Biggar
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