Iterative Feedback Tuning in Linear and Fuzzy Control Systems

  • Radu-Emil Precup
  • Mircea-Bogdan Rădac
  • Stefan Preitl
  • Emil M. Petriu
  • Claudia-Adina Dragoş
Part of the Studies in Computational Intelligence book series (SCI, volume 243)


Aspects concerning the design of linear and fuzzy control systems based on the Iterative Feedback Tuning (IFT) approach are discussed. Two types of controller parametric conditions are derived to guarantee the robust stability of the control systems. The conditions are included in the steps of the IFT algorithms of linear control systems. Next an IFT-based design of a class of Takagi-Sugeno PI-fuzzy controllers (PI-FCs) is given. The design method maps the parameters of the linear PI controllers onto the parameters of the Takagi-Sugeno PI-FCs. The application of IFT in linear and fuzzy control systems is exemplified in a case study dealing with the angular position control of a DC servo system with backlash laboratory equipment. The performance enhancement ensured by IFT and fuzzy control is illustrated by real-time experimental results.


Iterative Feedback Tuning fuzzy control robust stability 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Radu-Emil Precup
    • 1
  • Mircea-Bogdan Rădac
    • 1
  • Stefan Preitl
    • 1
  • Emil M. Petriu
    • 2
  • Claudia-Adina Dragoş
    • 1
  1. 1.Department of Automation and Applied Informatics“Politehnica” University of TimisoaraTimisoaraRomania
  2. 2.School of Information Technology and EngineeringUniversity of OttawaOttawaCanada

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