Preliminary feasibility study of a speed estimator for piezoelectric actuators used in forging processes
TypeCommunications avec actes
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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GIRAUD-AUDINE, Christophe; GIRAUD, Frédéric; AMBERG, Michel; LEMAIRE-SEMAIL, Betty (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 ...
Modelling and control of a travelling wave in a finite beam, using multi-modal approach and vector control method GHENNA, Sofiane; GIRAUD, Frédéric; GIRAUD-AUDINE, Christophe; AMBERG, Michel; LEMAIRE-SEMAIL, Betty (IEEE, 2015)This paper presents a new method to produce and control the vibration amplitude and direction of a travelling wave in a finite beam, using multi-modal approach. A closed loop control of the transducer vibration is applied ...
AMANCI, Adrien; GIRAUD, Frédéric; GIRAUD-AUDINE, Christophe; AMBERG, Michel; DAWSON, Francis; LEMAIRE-SEMAIL, Betty (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 ...
ENFERAD, Ehsan; GIRAUD-AUDINE, Christophe; AMBERG, Michel; LEMAIRE-SEMAIL, Betty; GIRAUD, Frederic (2018)To date, Several focusing techniques have been proposed to realize localized stimulation on haptic interfaces: phased arrays of actuators with delayed excitation, or time reversal techniques which require a preliminary ...
GHENNA, Sofiane; GIRAUD, Frédéric; GIRAUD-AUDINE, Christophe; AMBERG, Michel (IEEE, 2018)This paper presents the implementation of a novel vibration amplitude control and resonant frequency tracking for piezoelectric transducers (PTs) and ultrasonic motors (USMs). It is based on a generalization of the vector ...