Improvements of a PID Controller
Abstract: This paper describes three improvements for a PID controller. These improvements have been created with SattLine, which is an object-oriented, distributed process automation system developed by Alfa Laval.
These improvements are a compensator for static friction in control valves, an interpolation between the PID values when the system is non linear and the creation of a table to save different gain schedules.
The two first improvements have been tested in simulation and in a plant, Danisco Sugar, the third one has just been tested at Alfa Laval.
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