Program for selection of PID coefficients ExperTune
Purpose of the ExperTune program
This document provides an opportunity to get acquainted in detail with the capabilities of the Expertune program.
Allows you to understand the capabilities of the program, its analytical capabilities and the possibilities of modeling management processes.
For example, various formulas for PID controllers are explained (ISA algorithm, parallel, serial)
Various variants of noise, its influence on the regulation process and filtering methods are considered. Stability/Stability Analysis of Control Loops with Examples
An assessment is given of various problems encountered in the selection of control coefficients
Special tests, diagnostics and recommendations to identify the problem of circuits
Hysteresis
Valve sticking
Nonlinear contour
Contour asymmetry
Integrating circuit
Buffer level control
Reverse processes.
According to available estimates, 75-80% of control loops in industrial plants are more variable in automatic mode than in manual control mode. At the same time, a third of them, when the load or task (setpoint) changes, produces cyclic oscillations due to various non-linearities: hysteresis, delay, valve sticking, non-linearity of the process. About a third more generate cyclic oscillations due to poor adjustment of the regulators, and for the rest, the cause of such oscillations is design errors.
XTuneManual eng.pdf
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