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A NEW SELF-TUNING CONTROLLER FOR HVAC SYSTEMS.

Author(s) : WALLENBORG A. O.

Summary

A DISCRETE TIME PROCESS TRANSFER FUNCTION IS CALCULATED FROM THE WAVE FORM OF A PERIODIC OSCILLATION OBTAINED WITH A RELAY FEEDBACK TUNING EXPERIMENT, AND A GENERAL LINEAR DISCRETE TIME CONTROLLER IS DESIGNED USING POLE PLACEMENT BASED ON INPUT-OUTPUT MODELS. THE SAMPLING PERIOD AND THE DESIRED CLOSED-LOOP POLES ARE DETERMINED AUTOMATICALLY WITH RESPECT TO THE PROCESS DYNAMICS. THE DESIRED CLOSED-LOOP PERFORMANCE CAN ALSO BE EASILY MODIFIED BY THE OPERATOR. THE NEW ALGORITHM HAS WORKED WELL ON MANY DIFFERENT PROCESSES IN HVAC SYSTEMS. EXPERIMENTAL RESULTS FROM 2 DIFFERENT HVAC CONTROL APPLICATIONS ARE GIVEN. A SUBSTANTIAL REDUCTION IN COMMISSIONING TIME CAN BE ACHIEVED COMPARED WITH MANUAL TUNING.

Details

  • Original title: A NEW SELF-TUNING CONTROLLER FOR HVAC SYSTEMS.
  • Record ID : 1992-1315
  • Languages: English
  • Publication date: 1991
  • Source: Source: ASHRAE Trans.
    vol. 97; n. 1; 19-25; 6 fig.; 5 ref.; discuss.
  • Document available for consultation in the library of the IIR headquarters only.

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