DMCA
1A CONTROLLER FOR HVAC SYSTEMS WITH FAULT DETECTION CAPABILITIES BASED ON SIMULATION MODELS
BibTeX
@MISC{Salsbury_1acontroller,
author = {T. I. Salsbury},
title = {1A CONTROLLER FOR HVAC SYSTEMS WITH FAULT DETECTION CAPABILITIES BASED ON SIMULATION MODELS},
year = {}
}
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Abstract
This paper describes a control scheme with fault detection capabilities suitable for application to HVAC systems. The scheme uses static simulation models of the system under control to generate feed-forward control action, which acts to supplement a conventional PI(D) feedback loop. The feedforward action reduces the effect of plant non-linearity on control performance and provides more consistent disturbance rejection as operating conditions change. In addition to generating feedforward control action, the models act as a reference of correct operation. Faults that occur in the HVAC system under control cause the PI(D) controller to provide a greater than normal control action to compensate for fault-induced inaccuracies in the feedforward models. The controller monitors the level of feedback compensation and generates alarms when thresholds are exceeded. The paper presents results from testing the controller with a dual-duct air-handling unit.
Keyphrases
hvac system feedback compensation feedforward control action static simulation model correct operation fault detection capability feedforward action conventional pi control performance fault-induced inaccuracy dual-duct air-handling unit normal control action feedback loop consistent disturbance rejection feed-forward control action operating condition control scheme plant non-linearity feedforward model generates alarm
