Effect of fractional orders in the velocity control of a servo system

  • Barbosa R
  • Tenreiro Machado J
  • Jesus I
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The application of fractional-order PID controllers is now an active field of research. This article investigates the effect of fractional (derivative and integral) orders upon system's performance in the velocity control of a servo system. The servo system consists of a digital servomechanism and an open-architecture software environment for real-time control experiments using MATLAB/Simulink tools. Experimental responses are presented and analyzed, showing the effectiveness of fractional controllers. Comparison with classical PID controllers is also investigated. © 2009 Elsevier Ltd. All rights reserved.

Author-supplied keywords

  • Fractional calculus
  • Fractional controllers
  • Servo system
  • Ziegler-Nichols

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