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Multivariable control of vapor compression systems.

Author(s) : HE X. D., LIU S., ASADA H. H., ITOH H.

Type of article: Article

Summary

This paper presents the results of multi-input multi-output (MIMO) control of vapor compression cycles that have multiple actuators and sensors for regulating multiple outputs. The conventional single-input single-output (SISO) control was shown to have very limited performance. A low order lumped-parameter model was developed to describe the significant dynamics of vapor compression cycles. Dynamic modes were analyzed based on the low order model to provide physical insight of system dynamic behavior. To synthesize a MIMO control system, the Linear-Quadratic Gaussian (LQG) technique was applied to coordinate compressor speed and expansion valve opening with guaranteed stability robustness in the design. The MIMO control proposed in this paper could be extended to the control of vapor compression cycles in a variety of HVAC and refrigeration applications to improve system performance and energy efficiency.

Details

  • Original title: Multivariable control of vapor compression systems.
  • Record ID : 1999-3470
  • Languages: English
  • Source: HVAC&R Research - vol. 4 - n. 3
  • Publication date: 1998/07
  • Document available for consultation in the library of the IIR headquarters only.

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