TY - GEN
T1 - Synchronization and Desynchronizing Control Schemes for Supermarket Refrigeration Systems
AU - Larsen, Lars Finn Sloth
AU - Thybo, Claus Thybo
AU - Izadi-Zamanabadi, Roozbeh
AU - Wisniewski, Rafal
N1 - Contains The 16th IEEE International Conference on Control Applications (CCA) and the 22nd IEEE International Symposium on Intelligent Control (ISIC)
PY - 2007
Y1 - 2007
N2 - A supermarket refrigeration system is a hybrid system with switched nonlinear dynamics and discrete-valued input variables such as opening/closing of valves and start/stop of compressors. Practical and simulation studies have shown that the use of distributed hysteresis controllers to operate the valves leads to synchronization, meaning that the opening and closing actions of the valves coincide. Consequently, the compressor periodically has to work hard resulting in low efficiency, inferior control performance and a high wear on the compressor. In this paper we propose two control schemes of low complexity for desynchronizing the valve operations while improving performance. Simulation results indicate the potential increase in efficiency and reduction in wear comparing with traditional control schemes.
AB - A supermarket refrigeration system is a hybrid system with switched nonlinear dynamics and discrete-valued input variables such as opening/closing of valves and start/stop of compressors. Practical and simulation studies have shown that the use of distributed hysteresis controllers to operate the valves leads to synchronization, meaning that the opening and closing actions of the valves coincide. Consequently, the compressor periodically has to work hard resulting in low efficiency, inferior control performance and a high wear on the compressor. In this paper we propose two control schemes of low complexity for desynchronizing the valve operations while improving performance. Simulation results indicate the potential increase in efficiency and reduction in wear comparing with traditional control schemes.
U2 - 10.1109/CCA.2007.4389434
DO - 10.1109/CCA.2007.4389434
M3 - Article in proceeding
SN - 978-1-4244-0443-8
T3 - IEEE International Conference on Control Applications. Proceedings
SP - 1414
EP - 1419
BT - IEEE International Conference on Control Applications, CCA 2007
PB - Electrical Engineering/Electronics, Computer, Communications and Information Technology Association
T2 - 2007 IEEE Multiple-conference on Systems and Control (MSC2007)
Y2 - 1 October 2007 through 3 October 2007
ER -