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Vol. 126, Issue 3, March 2011, pp.110-118

 

Bullet

 

Implementation of PID Controller in MATLAB for Real Time DC Motor Speed Control System

 

*Manjunatha Reddy H. K., Immanuel J., Parvathi C. S., P. Bhaskar and L. S. Sudheer

Department of Instrumentation Technology, Gulbarga University P. G. Centre,

Raichur - 584 133, KA, India

*Govt. First Grade College, Shikaripura, KA, India

Tel.:+919448823002

*E-mail: manjunathareddy_hk@yahoo.co.in

 

 

Received: 18 January 2011   /Accepted: 17 March 2011   /Published: 29 March 2011

 

Abstract: In this paper the implementation of PIDC (proportional + integral + derivative controller) in MATLAB environment for real time DC motor speed control is presented. The MATLAB environment is chosen because of availability of tool boxes which allows the effective way of implementation and analysis of the control system. The performance of PID controller for different inputs is studied. To establish a communication between PC and process parameter, an indigenous Analog to digital and digital to analog (AD-DA) board is designed. This board consists of 12-bit A/D converter and 12-bit D/A converter to facilitate the data acquisition and control. In the present study Advantech make PCI-1751 DIOT card is used to interface AD-DA board to PC externally. The data between the AD-DA board and the PC is communicated through the script file written in MATLAB environment. By applying different standard test commands such as step, square, staircase and triangular, the performance of PID controller is studied. The PID controller provides better system response in terms of transient as well as steady-state performances. The controller parameters are manually tuned (kp=0.232, ki=0.078 and kd=0.035) and the results of the best tuned PID controller are presented.

 

Keywords: MATLAB, PIDC, PMDC motor, Real time

 

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