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Mark 1A Computer Mk 37 Director above the bridge of destroyer USS Cassin Young with AN/SPG-25 radar antenna. The Mark 1, and later the Mark 1A, Fire Control Computer was a component of the Mark 37 Gun Fire Control System deployed by the United States Navy during World War II and up to 1991 and possibly later.
And, because the governor is a servomechanism, its analysis in a dynamic system is not trivial. In 1868, James Clerk Maxwell wrote a famous paper "On Governors" [6] that is widely considered a classic in feedback control theory. Maxwell distinguishes moderators (a centrifugal brake) and governors which control motive power input.
A governor, or speed limiter or controller, is a device used to measure and regulate the speed of a machine, such as an engine.. A classic example is the centrifugal governor, also known as the Watt or fly-ball governor on a reciprocating steam engine, which uses the effect of inertial force on rotating weights driven by the machine output shaft to regulate its speed by altering the input flow ...
Centrifugal switches were also used in early electric fans, particularly those made in the 1900s and early 1910s. [citation needed] In aircraft, a centrifugal switch is used to control the starting and ignition circuits, the governed speed indication circuit and the overspeed protection circuit of the auxiliary power unit. This switch is ...
Three methods are used to vary the pitch: oil pressure, centrifugal weights, or electro-mechanical control. Engine oil pressure is the usual mechanism used in commercial propeller aircraft and the Continental and Lycoming engines fitted to light aircraft. In aircraft without a constant speed unit (CSU), the pilot controls the propeller blade ...
The definition of a closed loop control system according to the British Standards Institution is "a control system possessing monitoring feedback, the deviation signal formed as a result of this feedback being used to control the action of a final control element in such a way as to tend to reduce the deviation to zero." [2]