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Communication Dans Un Congrès Année : 2019

Shunted piezoelectrical flextensionnal suspension for vibration insulation

Résumé

The objective of the PyDAMP project is to develop a hybrid mechanical suspension to reduce the vibrations transmission on a wide frequency band. The undesired vibrations are generated by small electric motors (few kilograms). The concept of suspension is inspired by a Class IV flextensionnel transducer [1-3]. Flextensional transducers are a class of mechanical amplifiers composed of an active part, usually piezoelectric (bars, discs, rings), or magnetostrictive, and a shell that radiates in the surrounding fluid [4–6]. The suspension with piezoelectric pillar is developped by PYTHEAS Technology. A finite element study has been achieved to ensure the validity of the concept in terms of maximum admissible Von Mises stress, maximum displacement and modes shapes. An electromechanical model of the piezoelectrical suspension has been developed. Mechanical elements are converted in electrical components and an equivalent electrical circuit can be found. The electromechanical coupling of the transducer allows the introduction of mechanical damping and electric damping with different shunts based on resistor and negative capacitance [7, 8]. The simulation and the shunt optimisation are facilitated with only one physic, taking into account the whole dynamic behaviour of the piezoeletrical suspension.The piezoelectrical suspension is compared to a conventional viscoelastic suspension in terms of performances in the audible frequency range and validated using experimental tests.
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Dates et versions

hal-02188566 , version 1 (18-07-2019)

Identifiants

  • HAL Id : hal-02188566 , version 1

Citer

Kevin Billon, Nathan Montcoudiol, Alice Aubry, Rémi Pascual, Frederic Mosca, et al.. Shunted piezoelectrical flextensionnal suspension for vibration insulation. Surveillance, Vishno and AVE conferences, INSA-Lyon, Université de Lyon, Jul 2019, Lyon, France. ⟨hal-02188566⟩
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