Récupération d'énergie et contrôle vibratoire par éléments piézoélectriques suivant une approche non linéaire

Abstract : This work is focussed on vibration control and energy harvesting using embedded piezoelectric elements. Several nonlinear processing of the piezoelectric voltage are studied and developed. These techniques result in a drastic enhancement of the conversion capabilities of the piezoelectric material.
Vibration control techniques are generally described as active or passive. The passive techniques consist in connecting the piezoelectric elements to a passive electrical network. The active techniques require a bulky system built with at least a sensor, a control unit and a feedback actuator. In addition, external power sources and amplifier are needed for the control unit and the actuators. The studied nonlinear techniques, called SSD for “Synchronized Switch Damping” are described as semi-passive, because they don't require any external supply but perform a smart processing of the piezovoltage. These techniques are more effective and adaptable than the passive techniques. Moreover, they are easier to integrate than active techniques and exhibit comparable performances. A new approach to analyze the energy flow in a structure damped with theses nonlinear techniques is given, and several enhancements of these techniques are proposed. A new control law for complex signals and structures is notably described.
The SSD techniques have been extented to energy harvesting. The proliferation of transducers and sensors integrated in many systems indeed raises the problem of wires installation for power supplies and data transmission. This explains the growing interest in miniature electrical generators enabling to power, for instance, a wireless transducer and a small infrared or radio data transmitter. For a low consumption system placed on a vibrating structure, the extraction of electrical energy using an embedded piezoelectric device is particularly well adapted to create an autonomous electrical power supply. The energy harvesting techniques derived from the SSD approach lead to outstanding piezoelectric micro-generators, which allow to consider new self-powered devices with higher power supply requirements. It was shown that the extracted power can be multiplied by 10 compared to classical energy harvesting techniques, depending on the electromechanical structure and the mechanical excitation.
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https://tel.archives-ouvertes.fr/tel-00303823
Contributor : Adrien Badel <>
Submitted on : Tuesday, July 22, 2008 - 3:11:23 PM
Last modification on : Wednesday, November 20, 2019 - 1:44:21 AM
Long-term archiving on: Tuesday, September 21, 2010 - 5:24:33 PM

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  • HAL Id : tel-00303823, version 2

Citation

Adrien Badel. Récupération d'énergie et contrôle vibratoire par éléments piézoélectriques suivant une approche non linéaire. Autre. Université de Savoie, 2005. Français. ⟨tel-00303823v2⟩

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