ProportionalIntegralDerivativregler

ProportionalIntegralDerivative controller, often abbreviated as PID controller, is a control loop feedback mechanism widely used in industrial control systems and 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. It attempts to minimize the error by adjusting a control output. The controller attempts to correct the error by calculating and summing three distinct terms: the proportional, the integral, and the derivative values. The proportional term (P) produces an output that is proportional to the current error. The integral term (I) accounts for past errors by integrating the error over time, which helps eliminate steady-state errors. The derivative term (D) anticipates future errors by considering the rate of change of the error, which can help dampen oscillations and improve stability. The sum of these three terms forms the output signal applied to the actuator. Tuning the three coefficients, Kp, Ki, and Kd, is crucial for achieving optimal performance. Incorrect tuning can lead to instability, excessive oscillations, or slow response times. PID controllers are known for their robustness and versatility, making them a standard in many control applications.