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Vol. 121, Issue 10, October 2010, pp.106-120



Real Time Implementation of a DC Motor Speed Control by Fuzzy Logic Controller and PI Controller Using FPGA


G. Sakthivel, T. S. Anandhi, S. P. Natarajan

Department of Electronics &Instrumentation Engineering, Annamalai University,

Chidambaram-608002, India

Tel.: +91-9443270714

E-mail: gsauei@gmail.com



Received: 12 September 2010   /Accepted: 18 October 2010   /Published: 26 October 2010


Abstract: Fuzzy logic control has met with growing interest in many motor control applications due to its non-linearity, handling features and independence of plant modelling. The hardware implementation of fuzzy logic controller (FLC) on FPGA is very important because of the increasing number of fuzzy applications requiring highly parallel and high speed fuzzy processing. Implementation of a fuzzy logic controller and conventional PI controller on an FPGA using VHDL for DC motor speed control is presented in this paper. The proposed scheme is to improve tracking performance of D.C. motor as compared to the conventional (PI) control strategy .This paper describes the hardware implementation of two inputs (error and change in error), one output fuzzy logic controller based on PI controller and conventional PI controller using VHDL. Real time implementation FLC and conventional PI controller is made on Spartan-3A DSP FPGA (XC3SD1800A) FPGA for the speed control of DC motor. It is observed that fuzzy logic based controllers give better responses than the conventional PI controller for the speed control of dc motor.


Keywords: Conventional controller, FLC, VHDL, FPGA


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