Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Optimal PI Controller Design for Refrigeration System Considering Disturbance

외란을 고려한 냉동시스템의 최적 PI 제어기 설계

  • Jeong, Seok-Kwon (Department of Refrigeration and Air-Conditioning Engineering, Pukyong National University) ;
  • Hong, Ki-Hak (Graduate school of Refrigeration and Air-Conditioning Engineering, Pukyong National University)
  • 정석권 (부경대학교 냉동공조공학과) ;
  • 홍기학 (부경대학교 대학원 냉동공조공학과)
  • Received : 2012.09.18
  • Published : 2013.02.10
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Abstract

The proportional plus integral(PI) feedback control manner has been used in many general industrial fields such as refrigeration system because of its simple design process and favorable control performance. This paper deals with optimized PI controller design of the refrigeration system based on evaluation functions such as integrated absolute error(IAE). The suggested optimal PI gains can be easily calculated by a simple program and the optimal controllability satisfying the evaluation function can be assured. Furthermore, at the initial step of controller design, the suggested optimal gain is able to reflect some noise disturbances caused by an inverter which drives variable speed compressors. The validity of the suggested optimal gain is investigated by some simulations and experiments to verify its efficiency. From the results of comparing control performance between the optimal PI controller based on the evaluation function and the PI controller designed by the Matlab tuner which was known as the most popular gain tuner, the optimal PI controller showed more desirable control performance especially in transient responses.

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References

  1. Lee, S. W., Yeom, H. K., and Park, K. J., 2009, Performance of Hot Gas Bypass Type Oil Cooler System, Journal of Korea Society for Precision Engineering, Vol. 26, No. 3, pp. 73-80.
  2. Jung, Y. M., Byun, J. Y., Yoon, J. I., and Jeong S. K., 2009, A Study on High Precision Temperature Control of an Oil Cooler for Machine Tools Using Hot-gas Bypass Method, Journal of the Korean Society of Marine Engineering, Vol. 33, No. 7, pp. 1003-1011. https://doi.org/10.5916/jkosme.2009.33.7.1003
  3. Jeong, S. K., Lee, D. B., and Yoon, J. I., 2012, Comparison of System Performances of Hotgas Bypass and Compressor Variable Speed Control of Water Coolers for Machine Tools, SAREK, Vol. 24, No. 1, pp. 1-8.
  4. Hua, L., Jeong, S. K., and You, S. S., 2009, Feedforward Control of Capacity and Superheat for a Variable Speed Refrigeration System, Applied Thermal Engineering, Vol. 29, pp. 1067-1074. https://doi.org/10.1016/j.applthermaleng.2008.05.022
  5. Jeong, S. K. and Kim, S. H., 2011, Optimum Controller Design of a Water Cooler for Machine Tools Based on the State Space Model, SAREK, Vol. 23, No. 12, pp. 782-790. https://doi.org/10.6110/KJACR.2011.23.12.782
  6. Kim, S. C., Hong, D. S., and Chung, W. J., 2004, Temperature Control for an Oil Cooler System Using PID Control with Fuzzy Logic, Journal of the Korea Society for Machine Tool Engineering, Vol. 13, No. 4, pp. 87-94.
  7. Aprea, C., Mastrullo, R., and Renno, C., 2004, Fuzzy Control of the Compressor Speed in a Refrigeration Plant, International Journal of Refrigeration, Vol. 27, pp. 639-648. https://doi.org/10.1016/j.ijrefrig.2004.02.004
  8. Jeong, S. K., Byun, J. Y., Kim, S. H., and Yoon, J. I., 2011, Precise Temperature Control of Oil Coolers with Hot-gas Bypass Manner for Machine Tools Based on PI and Feedforward Control, SAREK, Vol. 23, No. 2, pp. 111- https://doi.org/10.6110/KJACR.2011.23.2.111
  9. Oh, S. R., 2009, The Design of PI Controller Using a Saturation Function in Frequency Domain, Information and Control Symposium, pp. 326-328.
  10. Cogan, B., de Paor, A. M., and Quinn, A., 2009, PI Control of First-order Lag Plus Time-delay Plants：Root Locus Design for Optimal Stability, Transactions of the Institute of Measurement and Control, Vol. 31, No. 5, pp. 365-379. https://doi.org/10.1177/0142331208095019
  11. Kim, M. J., Lee, Y. H., So, M. O., Ha, Y. S., Hwang, S. W., and Jin, G. K., 2007, Tuning Rules of the PID Controller Using RCGAs, Journal of the Korea Society of Marine Engineering, Vol. 31, No. 4, pp. 448-454. https://doi.org/10.5916/jkosme.2007.31.4.448