Primary topics in the Secondary School at NATTC Ward Island were advanced electronic circuits, advanced radio receivers and transmitters, antennas and arrays, synchros and servomechanisms, waveguides and microwave transmission, and cavity magnetrons.
42.
Typical radio control systems for radio-controlled models employ pulse width modulation ( PWM ), pulse position modulation ( PPM ) and more recently spread spectrum technology, and actuate the various control surfaces using servomechanisms.
43.
As the electronics revolution took off, single-signal channel circuit design became redundant, and instead radios provided proportionally coded signal streams which a servomechanism could interpret, using pulse-position modulation ( PPM ).
44.
Two main servomechanisms are used, the first one to maintain a correct distance between lens and disc, and ensure the laser beam is focused on a small " laser spot " on the disc.
45.
The on-board recovery system consisted of a servomechanism that shut down the engine, deployed a drag chute ( to cause the drone to nose over ) and opened the main parachute at a preset altitude.
46.
The endoskeleton is actuated by a powerful network of electric servomechanisms, making terminators Death rendered in steel . " In the later " Terminator " films, armies of endoskeleton-only terminators are seen.
47.
Valley was introduced to Jerome Wiesner, associate director of the Research Laboratory of Electronics at MIT . Wiesner noted that the Servomechanisms Laboratory had already begun development of a machine that might be fast enough for the task.
48.
In later line printers, High-speed servomechanisms usually drove the tractors, allowing very rapid positioning of the paper, both for advancing line-by-line and slewing to the top of the next form.
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Steam steering engines had the characteristics of a modern servomechanism : an input, an output, an error signal, and a means for amplifying the error signal used for negative feedback to drive the error towards zero.
50.
IT-assisted physical guidance ( for example, via NC, CNC, or robotics ) has been developed since the World War II era and uses electromechanical and electrohydraulic servomechanisms to translate digital information into position control.
