Control in which the control signal is a linear combination of the error signal, its integral, and its derivative.
Proportional plus Integral plus Derivative control is used in processes where the controlled variable is affected by long downtimes.
Actions used to correct the difference between a controller setpoint and the required setpoint. This method controls modulating equipment for example, valves, dampers, and other control elements. PID actions provide control stability and quick response to minimize setpoint error. PID control elements include proportional control, integral action, and derivative action. See proportional control. See integral action. See derivative action.
A three-term control algorithm where the manipulated variable m is the sum of proportional, integral, and derivative control actions (m(e) = P(e)+Iƒedt+Dde/dt). See proportional control, integral control, and derivative control.
Control algorithm that combines Proportional, Integral (reset) and Derivative (rate) controls providing a more responsive control system.
A three-term control mechanism combining proportional, integral, and derivative control actions. Also see proportional control and integral control.