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Linear matrix inequalities based on linear quadratic regulator for the H2/Hinf control of the inverter split air conditioner temperature.

Author(s) : YANG Y. B., WU M. D., CHANG Y. C.

Summary

In multi-evaporator air-conditioner systems, the compressor speed and the expansion value opening degree affect coupling the evaporator wall temperature in two-phase region and the superheat on the evaporator tube. This research used system identification to get the inner & outer loop transfer functions between the air conditioner and its environment. The anti-windup method avoided the saturation phenomenon generated from integral controller. The linear matrix inequalities (LMI) based on linear quadratic regulator mixed H2 and Hinf control algorithm computed the optimal control gains from the input and state performance indexes. In the target temperature achievement example for the inverter split air conditioner, this proposed method controlled the air conditioner with two evaporator temperatures efficiently through those two optimal feedback gains. In addition, the results show a novel path for energy saving by the proposed LMI method.

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Details

  • Original title: Linear matrix inequalities based on linear quadratic regulator for the H2/Hinf control of the inverter split air conditioner temperature.
  • Record ID : 2011-0277
  • Languages: English
  • Publication date: 2010/07/12
  • Source: Source: Proc. 2010 int. Refrig. Air Cond. Conf., Purdue Univ.
    n. 2184; 8 p.; fig.; 7 ref.

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