DC-Motor Control of Speed Using FUZZY-PID Controller

Abstract

There are many problems in obtaining very fast speed in some production processes. Many sensitive areas need a very precise and precise speed, for example in the medical fields (pharmaceutical industry, droplets, and intravenous fluids), food products. This dilemma was chosen for its importance in daily life and its sensitivity in terms of products. A brushless DC motor with a magnet being the rotor and stationary windings forming the stator, this design provides many advantages over other motors, they are becoming widely used in various consumer and industrial systems. One of the applications used here is the speed control of DC motor. DC motors are used in industry extensively due to their low cost, low energy consumption and their easy adaptation with digital systems. Controlling the speed of a DC motors is very important as any small change can lead to instability of the closed loop system. The most commonly used controller for the position control of DC servomotor is conventional Proportional –Integral –Derivative (PID) controller. However, the PID controller has some disadvantages such as: the high starting overshoot, sensitivity to controller gains and sluggish response due to sudden disturbance. So, the relatively design PID controller with computational optimization approach method is proposed to overcome the disadvantages of the conventional PID controller. In position control system, PID controller sometimes cannot make this application accurate because of nonlinear properties. Therefore, in this thesis the fuzzy logic controller is proposed to overcome the problem of PID controller. Fuzzy logic controller has ability to control the nonlinear system because of the algorithm is implementing in language. Based on the simulation result the fuzzy logic controller designed is able to improve the performance of the position control system compared to the PID controller in term of rise time (Tr) and settling time (Ts). This research presents a design and implementation of Fuzzy Logic PID Controller using 8-bit microcontroller U-Board speed control. The speed of system depends on the speed of considered DC motor. So, the main speed control is to control the speed of considered DC motor. The frequency response of the system and its specifications were calculated, and Comparison between the conventional output and the fuzzy self-tuning output was done on the basis of the simulation result obtained by MATLAB Simulink. This study is a practical study aimed at solving the forms of speed accuracy, or at least contributing and adding in this subject in an effective manner, using the two methods of simulation using the PROTEUS program, and practical application of a real circuit.