Computer aided design of control algorithms based on identified process models

Abstract

A software package ‘CADCA’ was developed for the design of control algorithms and the closed loop control with process computers. Based on parametric process models, which e.g. can be obtained by on-line identification with another software package, different feedback control algorithms can be designed. By an interactive dialog between the operator and the process computer ten different feedback control algorithms (PID-, deadbeat and state controllers with observers) can be designed for linear single input/single output processes. The closed loop behaviour is simulated in the process computer and displayed. The control algorithms can be modified and redesigned upon request. A best suited control algorithm is selected and implemented so that closed loop operation can start. An additional package ‘CAFCA’ allows the design of feedforward control algorithms. Results are shown for the application of CADCA on an industrial size heat exchanger.