Error behaviour in PID controll systems with dynamic processes

Abstract

This paper deals with current state of art in field of tuning methods for PID controllers, and shows how output error depends on dynamicity of the process. Controlled process is dynamic, therefore it can change over with various dynamicity. This dependency leads to adaptive controllers, and new tuning methods for them. In the first part of the paper is presented general description of PID controller and tuning algorithms. There are mentioned online and offline tuning methods. In the second part of the paper, is mentioned first experimental result, which shows dependency of output error on dynamicity of process. This dependency has serious effects on behaviour of whole control system.