Barbosa, RamiroTenreiro Machado, J. A.Jesus, Isabel S.2019-04-042008-07http://hdl.handle.net/10400.22/13394In this paper are investigated several types of fractional-order PID controllers in the velocity control of a servo system. The fractional controller is more flexible and gives the possibility of adjusting carefully the dynamical properties of a control system. The servo system is controlled by using a real-time digital control system based on MATLAB/Simulink. Results are compared with those obtained from classical PID controllers. Experimental responses are presented and analyzed, showing the effectiveness of the proposed fractional-order algorithms.engFractional-orderPID controllersFractional calculusControl systemsconference object10.3182/20080706-5-KR-1001.02583