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Vol. 129, Issue 6, June 2011, pp.69-85

 

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Simple Design of a PID Controller and Tuning of Its Parameters Using LabVIEW Software

 
1Subrata CHATTOPADHYAY, 1Ganesh ROY and 2Mrutyunjaya PANDA

1Dept. of Electrical Engineering,

National Institute of Technical Teachers' Training and Research, Kolkata

Block-FC, Sector- III, Salt Lake City, Kolkata-700 106, India

2Department of Electrical & Electronics Engineering,

Gandhi Institute for Technological Advancement, Bhubaneswar-752054, Orissa, India

Tel.: 91(033)2337-2332, fax: 91(033)2337-6331

E-mail: subrata0507@sify.com

 

 

Received: 28 April 2011   /Accepted: 20 June 2011   /Published: 30 June 2011

Handbook of Laboaratory Measurements book

 

Abstract: Feedback control system with PID Controller is an important technique that is widely used in the process industries. Their main advantage is that corrective action occurs as soon as the controlled variable deviates from the set point, regardless of the source and type of disturbance. Again if process conditions change, retuning the controller usually produces satisfactory control. The degree of convergence of the output waveform of PID controller is depending upon proper tuning of the controller. In this paper the control parameters (KP, KI, KD) of a PID controller are tuned to their optimum value. The controller algorithm is simulated by using LabVIEW (G language) software and usefulness of this controller for controlling different process variables is studied using proper tuning. The designed virtual instrument includes all the necessary components and facilities necessary for PID controller to function properly and to control any linear process. All the issues related to integral windup, derivative overrun, output signal limits and sampling interval ∆t are well considered. The created Sub VI program may be used as a controller in a closed loop which is able to control a process.

 

Keywords: LabVIEW, PID controller, Tuning, Sampling interval, Integral windup, Process variables

 

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