Heating, ventilation and air conditioning (HVAC) system and...

Details Heating, ventilation and air conditioning (HVAC) system and... Heating, ventilation and air conditioning (HVAC) system and...

2006-07-18

2006-07-18

Norman, Marc (Department: 3744)

Refrigeration

Automatic control

Refrigeration producer

C062S115000, C062S224000

Reexamination Certificate

active

07076962

ABSTRACT:
A new feedback linearization approach to advanced control of single-unit and multi-unit HVAC systems is described. In accordance with the approach of the invention, this new nonlinear control includes 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 approach 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, (4) much easier design procedures since there is no need for tuning the PI control gains over wide range operation.

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