Controller Design of Absorption Heat Pump System via LMI.

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  • OHGATA AKIHIRO
    Graduate School of Information Science, Nara Institute of Science and Technology
  • YAMASHITA YUH
    Graduate School of Information Science, Nara Institute of Science and Technology
  • NISHITANI HIROKAZU
    Graduate School of Information Science, Nara Institute of Science and Technology

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  • ＬＭＩを用いた吸収冷凍機の制御系設計
  • LMI オ モチイタ キュウシュウ レイトウキ ノ セイギョケイ セッケイ

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Abstract

An absorption heat pump system is a complex nonlinear system. The system dynamics varies considerably depending on the load. The local linearization technique is not suitable for such a system, because a linearized model approximates the original nonlinear system only in the neighborhood of the point where linearization is done. In this paper, the dynamics of an absorption heat pump system is modeled as a linear time-varying system, of which the system matrix is within a specified polytope at any time. Once a plant is modeled as a polytope system, a controller design problem can be reduced to a convex programming problem which can be solved easily. Numerical simulations illustrate that this procedure is practical and effective to design a load following controller for the absorption heat pump system.

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