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Design and simulation of a fuzzy controller for naturally ventilated buildings.

Author(s) : MARJANOVIC L., EFTEKHARI M.

Type of article: Article

Summary

In this article the design and validation process of a supervisory control for a single-sided naturally ventilated test room is described. The controller is based on fuzzy logic reasoning and sets of linguistic rules in the form of IF-THEN rules are used. The inputs to the controller are the outside wind speed, outside and inside temperatures. The output is the position of the opening. Three rule bases of different complexity were developed and are presented and analysed in this article. Validation through simulation offers possibility of testing the controller under extreme conditions regardless of physical limitations of an experimental test cell. Simulations were performed for different typical levels of input parameters and also for extreme fictitious conditions. Simulations were carefully designed to allow simultaneous comparison of different controllers performances. Simulation results have shown that all three controllers are capable of responding to the changes in outside conditions by adjusting the opening positions. They satisfy security requirements due to strong wind and successfully, in a stable manner respond to sudden changes in wind velocity and outdoor temperature. A controller with more membership functions and therefore a larger number of IF-THEN rules was more responsive to the changes in outside conditions.

Details

  • Original title: Design and simulation of a fuzzy controller for naturally ventilated buildings.
  • Record ID : 2004-2425
  • Languages: English
  • Source: Build. Serv. Eng. Res. Technol. - vol. 25 - n. 1
  • Publication date: 2004
  • Document available for consultation in the library of the IIR headquarters only.

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