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SLIDING MODE SPEED CONTROL OF A DC MOTOR (IEEE 2011)

ABSTRACT :

The main objective of this paper is to control
the speed of separately excited DC Motor using a Sliding
mode controller based on VSS approach. This controller is
based on variable structure systems which aim at reducing
the peak overshoot, steady state error and settling time of a
DC Motor. In the first stage, PI controller is used to
control the speed of DC Motor. A model is developed and
simulated using MATLAB/SIMULINK. Later on the same
is done with sliding mode controller. The speed control of
DC Motor using both PI and Sliding mode controllers is
studied and the results are compared. The simulation
results show that Sliding mode controller is superior than
PI for speed control of DC motor. Since the SMC is robust
in presence of disturbances, the desired speed is perfectly
tracked.