Modeling and Design of a Fuzzy Logic Based PID Controller for DC Motor Speed Control in Different Loading Condition for Enhanced Performance

Abstract

This paper proposes the design and simulation of a Fuzzy Logic based PID controller for DC motor speed control. The speed of a DC motor depends on armature voltage, field current and torque. In this paper, the armature voltage is changed in order to have the required speed output. The armature voltage is firstly controlled by a simple proportional controller and then controlled by PID constants and tuned by a Fuzzy Logic Controller (FLC). The FLC tunes the values of PID parameters based on the fuzzy rules fed into it and gives a satisfactory output wave shape for wide range of motor speed variation. Constant output voltage is maintained in the proposed system though changes are done in input voltage. Hence, significant amount of reduction in overshoot is observed which improves the efficiency of the motor. MATLAB-Simulink environment is used to achieve the results of the simulation and carry out the analysis.