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Centrifugal governor
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A centrifugal governor is a specific type of governor with a feedback system that controls the speed of an engine by regulating the flow of fuel or working fluid, so as to maintain a near-constant spe
Cut-away drawing of a steam engine speed governor. The drive shaft whose speed is being sensed is at top right. The valve starts fully open at zero speed, but as the balls rotate and rise, the central valve stem is forced downward and closes the valve.
Cut-away drawing of a steam engine speed governor. The drive shaft whose speed is being sensed is at top right. The valve starts fully open at zero sp
A millstone governor at Sluis, in the Netherlands[citation needed]
A millstone governor at Sluis, in the Netherlands[citation needed]
Boulton & Watt engine of 1788
Boulton & Watt engine of 1788
A Porter governor on a Corliss steam engine. This design, patented by Charles Porter in 1858, used lighter balls and a sliding weight on the spindle;
A Porter governor on a Corliss steam engine. This design, patented by Charles Porter in 1858, used lighter balls and a sliding weight on the spindle; it suited faster engines.
Control theory
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Control theory is a field of control engineering and applied mathematics that deals with the control of dynamical systems. The aim is to develop a model or algorithm governing the application of syste
Centrifugal governor
…in a dynamic system is not trivial. In 1868, James Clerk Maxwell wrote a famous paper "On Governors" that is widely considered a classic in feedback control theory. Maxwell distinguishes moderators (a centrifugal brake) and governors which control motive power input. He considers devices by James Watt, Professor…
Example of a single industrial control loop; showing continuously modulated control of process flow.
Example of a single industrial control loop; showing continuously modulated control of process flow.