2002 · 46 citations · 5 references
Ultimate ParametersEngineeringControl SystemsHvac Control SystemsSystems EngineeringController TuningPid ControllersControl AlgorithmsControl MethodModel-based Control TechniqueMechatronicsComputer EngineeringControl EngineeringControl System EngineeringProcess Time DelaysAerospace EngineeringMechanical SystemsProcess ControlBusinessPid ControlClosed-loop ControlControl Technology
This paper describes the effects of disturbances and process time delays on control performance. Their relationships to HVAC control systems are discussed. The relationships between tuning rules based on open-loop parameters and those based on ultimate parameters are then studied. It reveals that the Ziegler-Nichols rules based on ultimate parameters are more conservative than those based on open-loop parameters. The modified relationships between the normalised time delay and the ultimate parameters can be used as a guideline for further adjustment of the control parameters.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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