Title :
On performance and tuning of PID controllers in HVAC systems
Author :
Geng, Guang ; Geary, G.M.
Author_Institution :
Sch. of Eng. & Comput. Sci., Durham Univ., UK
Abstract :
This paper describes the effects of disturbances and process time delays on control performance. Their relationships to HVAC control systems are discussed. The relationships between tuning rules based on open-loop parameters and those based on ultimate parameters are then studied. It reveals that the Ziegler-Nichols rules based on ultimate parameters are more conservative than those based on open-loop parameters. The modified relationships between the normalised time delay and the ultimate parameters can be used as a guideline for further adjustment of the control parameters
Keywords :
air conditioning; control system analysis; delays; load regulation; space heating; temperature control; three-term control; tuning; ventilation; HVAC systems; PID controllers; Ziegler-Nichols rules; load disturbances; open-loop parameters; process time delays; tuning; Centralized control; Computer science; Control systems; Delay effects; Feedback control; Heating; Open loop systems; Temperature control; Testing; Three-term control;
Conference_Titel :
Control Applications, 1993., Second IEEE Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-1872-2
DOI :
10.1109/CCA.1993.348229
