Control Structures Based on Constrained Inverses

Szeifert, Ferenc and Chován, János Tibor and Nagy, Lajos (2007) Control Structures Based on Constrained Inverses. HUNGARIAN JOURNAL OF INDUSTRY AND CHEMISTRY, 35. pp. 47-55. ISSN 0133-0276

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Abstract

The widespread use of the PID algorithms in the classical feedback scheme is due to the following to basic reasons: the role of PID-controllers in the traditional process control profession, and the good control performance achieved at the local control level. Present paper proposes a well structured control solution for the local control level allowing the integration of different types of engineering information into the control algorithm. Based on a comparative study of the structures of PID and IMC controllers a novel control structure with two degrees of freedom (or three if the possibility of adaptation is considered too) is defined. The application of the new control structure is illustrated by the example of the temperature control in a laboratory water heater system.

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