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The use of simulation data to design rule-based controllers for HVAC systems

A. L. Dexter, M. E. Hawkins, 1993
Bibliographic info: Building Simulation, Australia, 1993, p. 421-427
Languages: English

Me design of a fuzzy rule-based controller for the mixing-box of an air-handling unit is used to demonstrate how data obtained by computer simulation can be used to generate the rules. The controller uses measurements of the return and fresh air temperatures, together with the pressure drops across the dampers, to calculate values for the actuator control signals which determine the position of the dampers. The paper explains the methods used to generate the rules, discusses the choice of fuzzy reference sets and describes the approach used to produce suitable training data. The rule-based controller is implemented in a prototype version of the outstation of a new type of building energy management system which has a dedicated knowledge-based system capability. The performance of the controller is assessed using a building emulator which simulates the dynamic operation of an air-handling unit. Results are presented which illustrate the performance of the controller for both large and small differences in the return and fresh air temperatures, for a wide range of desired supply air temperatures and for different Jan speedy.


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