PID-Regler

摘要

In order to reduce overshooting of the controlled variable upon rapid changes of the reference variable (w) in a closed-loop control circuit consisting of a PID controller with parallel proportional component (3), integral component (6, 7) and differential component (4, 5), and a controlled system with quasi-integral behavior, the time derivative of the actual value of the controlled variable (y) is fed to the integral component of the PID controller with a negative sign. The PID controller is particularly suitable for automatic control of the r.p.m. of hydraulic secondary units, and for automatic pressure control with hydraulic variable-displacement pumps, and can be implemented simply as a digital controller.