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Fault tolerant control of piezoelectric traveling wave ultrasonic motor

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3 Author(s)
Boukhnifer, M. ; Lab. Commande et Syst., ESTACA, Levallois-Perret, France ; Chaibet, A. ; Larouci, C.

Ultrasonic piezoelectric motor technology is an important system component in integrated mechatronics devices working on extreme operating conditions. Due to these constraints, robustness and performance of the control interfaces should be taken into account in the motor design. In this paper, we propose an architecture for a fault tolerant control using Youla parameterization for an ultrasonic piezoelectric motor. The distinguished feature of our controller architecture is that it shows structurally how the controller design for performance and robustness may be done separately which has the potential to overcome the conflict between performance and robustness in the traditional feedback framework. A fault tolerant control architecture includes two parts: one part for performance and the other part for robustness. The controller design works in such a way that the feedback control system will be solely controlled by PII performance controller for a nominal model without disturbances and Hinfin robustification controller will only be activated in the presence of the uncertainties or an external disturbances. The simulation results demonstrate the effectiveness of the proposed fault tolerant control architecture.

Published in:

Control Applications, (CCA) & Intelligent Control, (ISIC), 2009 IEEE

Date of Conference:

8-10 July 2009