Modelling, identification and control of a Langevin transducer
Communication avec acte
Auteur
GHENNA, SofianeGIRAUD, FrédéricAMBERG, MichelLEMAIRE-SEMAIL, Betty 
GIRAUD-AUDINE, ChristopheRésumé
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 a fixed frequency as the generation of travelling wave. In this paper, the transducer is modelled in rotating frame, and the decoupling according to two-axis allows to obtain a double independent closed loop control to address this issue. It is possible to control the transducer vibration amplitude and its relative phase, in steady state even in transient by acting on the amplitude of the supply voltage. Thanks to vector control method. This approach will be confirmed with experimental and simulation results.
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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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Communication avec acte; ; ; ;GIRAUD-AUDINE, Christophe (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 ...
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Communication avec acte; ; ; ;GIRAUD-AUDINE, Christophe (IEEE, 2017)
The multimodal control of a 2D controlled-Friction Device is presented. We use the Vector control method because the phase and amplitude of two vibration modes at a same frequency can be precisely set. The closed loop ...
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Communication avec acte; ; ; ;GIRAUD-AUDINE, Christophe (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 ...
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Article dans une revue avec comité de lecture; ; ;GIRAUD-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 ...