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Introduction to PID Autotuning


What is an Autotuner
Introduction to the PID Autotuning
The ISA-PID Regulator
The structure of the ISA-PID regulator
Process Identification
How to obtain a "description" of the plant represented by a simple model or by a set of characteristics
Synthesis Method
How to compute the parameters of the PID regulator from the available description of the plant

What is an Autotuner

An autotuner is something capable of computing the parameters of a regulator connected to a plant (i.e. tuning that regulator) automatically and, possibly, without any user interaction apart from initiating the operation.

The best way to understand autotuners is to analyze how a PID regulator may be manually tuned by a human. The basic steps of a tuning process may be summarized as follows

Formalizing these steps establishes a tuning method. An autotuner is then an implementation of a tuning method capable of running automatically.

The "description" of the process may be obtained in two ways:

Tuning rules can be constructed in several ways:


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