Closed-loop controller: Difference between revisions

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[[File:Industrial control loop.jpg|thumb|300px|Example of a single industrial control loop; showing continuously modulated control of process flow.]]

[[File:Closed Control Loop.svg|thumb|300px|AIllustration of a Closed Loop Control consisting of [[Setpoint (control system)|Set Point]] <math>w(t)</math>, [[Feedback|Measured Output]] <math>y_m(t)</math>, Measured Error <math>e(t)</math>, Controller Output <math>u(t)</math>, System Input <math>u_s(t)</math>, Disturbance <math>d(t)</math>, and System Output <math>y(t)</math>.]]

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==PID feedback control==

{{main|PID controller}}

[[File:PID en.svg|right|thumb|400x400px|A [[block diagram]] of a PID controller in a feedback loop,; {{math|''r''(''t'')}} is the desired process value or "set point", and {{math|''y''(''t'')}} is the measured process value.]]

A proportional–integral–derivative controller (PID controller) is a [[control loop]] [[feedback mechanism]] control technique widely used in control systems.