Experimental comparison of digital control strategies in a DC servo‐drive

In this paper, three fixed-parameter algorithms are studied and applied to the speed control of a DC servo-drive. They are Proportional Integrative (PI), Pole Placement (PP), and Generalized Minimum Variance (GMV). A comparison between these algorithms is made for small-signal step response by simulation and by obtaining experimental results. The comparison, which involves changing of some of the most important system parameters, brings out advantages and drawbacks of each algorithm when it is applied to a non-ideal system such as the servo-drive considered.