Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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PI Controller Design of the Refrigeration System Based on Dynamic Characteristic of the Second Order Model

  • Jung, Young-Mi (Department of Refrigeration and Air-conditioning Engineering, Pukyong National University) ;
  • Jeong, Seok-Kwon (Department of Refrigeration and Air-conditioning Engineering, Pukyong National University) ;
  • Yang, Joo-Ho (Department of Mechanical System Engineering, Pukyong National University)
  • Received : 2014.12.04
  • Accepted : 2014.12.04
  • Published : 2014.12.31
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Abstract

This paper deals with deterministic PI controller design based on dynamic characteristics for refrigeration system. The temperature control system of an oil cooler is described as a typical 2nd order model of the refrigeration system which has zeros in a transfer function. PI controller gains satisfying control specifications are represented by the dynamic characteristic functions using relationship between the parameters and the control specifications in the model. Phase margin was considered to increase robustness of the oil cooler control system. Furthermore, the influence of zeros in the model to the control specifications was analyzed in detail for improving control performance. The validity of the suggested PI controller design was investigated using the four types of gains which had been already confirmed their control performances through experiments.

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References

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