Preliminary feasibility study of a speed estimator for piezoelectric actuators used in forging processes
Communication avec acte
Auteur
GIRAUD, Frédéric 
GIRAUD-AUDINE, ChristopheRésumé
In this paper the feasibility of a speed estimator for a piezoelectric actuator used in a forging process is studied. It is based on a simplified linear model and its robustness is tested using a more complex model that include the hysteresis effects. The preliminary results proves that the concept is feasible despite the non-linearities, provided that some parameters of the actuator are known.
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Communication avec acte; ; ; ;GIRAUD-AUDINE, Christophe (IEEE, 2015)
This paper presents a method to control ultrasonic waves on a beam, allowing to obtain a Multi-touch ultrasonic tactile stimulation in two points, to give the sensation to two fingers, from two piezoelectric transducers. ...
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Article dans une revue avec comité de lectureGIRAUD-AUDINE, Christophe; ; ; (IOP Publishing, 2015)
Stress in a piezoelectric material can be controlled by imposing an electrical field. Thanks to feedback, this electrical field can be a function of some strain-related measurement so as to confer on the piezoelectric ...
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Communication avec acte; ; ; ;GIRAUD-AUDINE, Christophe (IEEE, 2015)
The control of the vibration amplitude, and the resonance frequency tracking for ultrasonic transducer have been established. However, some applications require to control the vibration amplitude and its relative phase at ...
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Article dans une revue avec comité de lecture; ; ; ; ;GIRAUD-AUDINE, Christophe (Elsevier, 2014)
When the frequency of the source of vibration of a piezolectric generator is significantly different from its eigenfrequency, the dielectric power losses become prominent and decrease the amount of power which is practically ...
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Article dans une revue avec comité de lecture; ; ; ;GIRAUD-AUDINE, Christophe (Elsevier, 2019)
In the field of tactile feedback, researchers try to generate localized stimulations on screens. Some solutions such as time reversal or phased array use vibration induced in the screen equipped with piezoelectric ceramics. ...