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Stable iterative feedback tuning method for servo systems

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5 Author(s)
Radac, M. ; Dept. of Autom. & Appl. Inf., Politeh. Univ. of Timisoara, Timisoara, Romania ; Precup, R. ; Petriu, E.M. ; Preitl, S.
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This paper presents an Iterative Feedback Tuning (IFT) method to guarantee the control system stability throughout the iterations. The theoretical framework is based on the closed-loop stability testing in the context of coprime factor uncertainty for the controller, and it makes use of the small gain theorem for discrete-time systems. Bounds on the gain of the systems involved in the stability analysis are found from nonparametric models in frequency domain. A digitally simulated case study concerning the angular position control of a servo system is included to validate the new stable IFT method.

Published in:

Industrial Electronics (ISIE), 2011 IEEE International Symposium on

Date of Conference:

27-30 June 2011