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Radar System Engineering

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SEC. 9.17] STABILIZATION OF’ THE BEAM 307<br />

been removed from the gently curved support casting, which can be seen<br />

supported bet\veen the tilt bearings at the tips of the yoke. A table<br />

clamped to the yoke supports the gyro-torque unit and a servoamplifier.<br />

The gyro is mounted in gimbals and is provided with one synchro take-off<br />

FIG. 935,-A<br />

stabilizing attachment mountwl on an airbornescanner. The reflector has<br />

been replaced by a camerafor test purposes.<br />

at the gimbal axis parallel to the tilt axis. A synchro is also located at<br />

the output crankshaft of the torque unit. The servoamplifier essentially<br />

amplifies the algebraic difference between the voltages from these takeoffs,<br />

and thus actuates the motor in the torque unit to assure alignment<br />

between the output shaft and the gyro. The output shaft is linked to the<br />

paraboloid support by a rod seen at the bottom of Fig. 035. When there

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