Dynamic determination of DC motor parameters - Simulation and testing

DC motors are widespread used in modern day applications of different kind, especially those that require a closed loop control. In order to use a DC motor in closed loop control systems, it is required to know the dynamic both electrical and mechanical parameters. Parameter estimation for DC motors, both brushed and brushless, is of equal importance in the field of motor control. Accurate determination of DC motor parameters is vital for a good control. The estimation of parameters could be done using several methods: using hybrid equivalent circuit model, step response, dynamic load variation, closed loop error approach, least square parametric estimation, least-squares approximation technique and a closed-loop disturbance observer. In the present paper, it is studied the dynamic mechanical parameter identification as a response to a step input signal and identified with a 2^nd order dynamic system.