Title :
A new feedback linearization approach to advanced control of multi-unit HVAC systems
Author :
He, Xiang-Dong ; Asada, H. Harry
Author_Institution :
Daikin U.S. Corp., New York, NY, USA
Abstract :
A new feedback linearization approach to advanced control of multi-unit HVAC systems is developed. The central idea of this new nonlinear control is to include a model-based feedback linearization part to compensate for the nonlinearity in the system dynamics. Therefore, the evaporating temperature and superheat values can be controlled by linear PI control designs to achieve desired system performance and reliability. The main advantages of the new nonlinear control method include: (1) better performance even with large model errors, (2) being able to adapt to indoor unit turn on/off operation, (3) much smaller PI control gains compared to that of current feedback PI controls, and (4) much easier design procedures since there is no need for tuning the PI control gains over wide range operation.
Keywords :
HVAC; PI control; feedback; heat transfer; linearisation techniques; nonlinear control systems; temperature control; evaporating temperature; evaporating temperature control; feedback linearization approach; linear PI control designs; multi unit HVAC systems; nonlinear control; superheat values; system dynamics; Centralized control; Control systems; Error correction; Linear feedback control systems; Nonlinear control systems; Nonlinear dynamical systems; Performance gain; Pi control; System performance; Temperature control;
Conference_Titel :
American Control Conference, 2003. Proceedings of the 2003
Print_ISBN :
0-7803-7896-2
DOI :
10.1109/ACC.2003.1243419
