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PID controller

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**PID controller**

What is PID controller?

A PID (Proportional-Integral-Derivative) controller is a control loop mechanism employing feedback that is widely used in industrial control systems and a variety of other applications requiring continuously modulated control. A PID controller continuously calculates an error value as the difference between a desired setpoint and a measured process variable and applies a correction based on proportional, integral, and derivative terms. These three terms are summed to calculate the output of the PID controller. By tuning the three parameters in the PID controller algorithm, the controller can provide control action designed for specific process requirements. Common uses include temperature control, flow control, pressure control, and motor speed control.

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