Abstract: DC servo motor is widely used in many applications like Robotics, Conveyor Belts and Camera. In this paper a dc servo motor using MATLAB has been designed whose speed may be investigated using the Proportional, Integral, Derivative (KP, KI, KD) gain of the PID controller. The purpose of this paper is to design a Ziegler-Nichols controller to improve the performance (speed) of the DC motor in order to control the speed of the motor. The results are compared with controller tuned by PI, PID Ziegler- Nichols method. Since, classical controllers like P, PI and PID are failing to control the drive when weight parameters are also changed. The PID controller has some disadvantages like: high overshoot, sensitivity to controller gains and slow response. Fuzzy control and SMC is proposed in this study. In this paper a comparison among PI, PID and fuzzy logic controller, sliding model controller, through MATLAB/Simulink software have been presented the obtained results are promising and is likely to be utilized by the industries.

Keywords: Control System, Proportional-Integral (P-I) controller, Fuzzy logic control, Sliding mode controller Speed control, Modelling of System, D.C. Servo Motor, MATLAB / SIMULINK