Parametric Modeling and PID Control of DC Motor

This work attempts to find an identified model of DC shunt motor which can be utilized further to design a controller for speed control of that motor. DCshunt motors are extensively used in servo and mechatronic systems. The parametric model of DC shunt motor has been identified and Proportional-Integral-Derivative (PID) controller has been designed for the control of the speed of the motor. The input-output data for the identification has been collected from the MATLAB SIMULINK model of the DC motor with real DC shunt motor parameters and using these input-output data, parametric Box-Jenkins model of the DC motor has been identified. The identified model has been compared with the classical transfer function model of the system to find out the accuracy of the identification technique in the light of step response and results show that the identified model behaves in a better manner than the classical model of the system. The Proportional-Integral (PI) and PID controllers have been designed to control the speed of the machine based on the identified model. The PID controller gives better performance in terms of steady-state error and transient response specifications. The PID controller also controls the robustly angular speed of the DC shunt motor in presence of parameter variations.

Keywords:

Parametric Modeling , System Identification , DC Shunt Motor , PID Controller