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A Design of a PID Self-Tuning Controller Using LabVIEW
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Journal of Software Engineering and Applications·Volume 04 (2011)·Pages 161–171·Published 18 March 2011·DOI10.4236/jsea.2011.43018
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Abstract
In this paper a trial has been made to design a simple self-tuning LabVIEW-based PID controller. The controller uses an open-loop relay test, calculates the tuned parameters in an open loop mode of operation before it updates controller parameters and runs the process as a closed-loop system. The controller reacts on a persistent offset error value as a result of load disturbance or a set point change. Practical results show that such a controller may be recommended to control a variety of industrial processes. A GUI was developed to facilitate control-mode selection, the setting of controller parameters, and the display of control system variables. GUI makes it possible to put the controller in manual or self-tuning mode.
KeywordsPID ControlManual TuningSelf-TuningOpen-Loop Relay TestProcess VariableSystem Offset Error
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