The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform
Donald J L Leo - One of the best experts on this subject based on the ideXlab platform.
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High-strain ionomeric-ionic liquid electroactive actuators
Sensors and Actuators A: Physical, 2006Co-Authors: Barbar J Akle, Matthew D Bennett, Donald J L LeoAbstract:Ionomeric polymers are a class of Electromechanical Transducer consisting of an ionomeric substrate with metal-plated electrodes. Application of a low-voltage (10 Hz), but this effect is small compared to the increase in strain produced by maximizing the capacitance. Increasing capacitance produces a Transducer that is able to achieve >2% strain (ε) at voltage levels of ±3 V. © 2005 Elsevier B.V. All rights reserved.
Barbar J Akle - One of the best experts on this subject based on the ideXlab platform.
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High-strain ionomeric-ionic liquid electroactive actuators
Sensors and Actuators A-physical, 2006Co-Authors: Barbar J Akle, Matthew D BennettAbstract:Abstract Ionomeric polymers are a class of Electromechanical Transducer consisting of an ionomeric substrate with metal-plated electrodes. Application of a low-voltage ( 10 Hz), but this effect is small compared to the increase in strain produced by maximizing the capacitance. Increasing capacitance produces a Transducer that is able to achieve >2% strain (ɛ) at voltage levels of ±3 V.
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High-strain ionomeric-ionic liquid electroactive actuators
Sensors and Actuators A: Physical, 2006Co-Authors: Barbar J Akle, Matthew D Bennett, Donald J L LeoAbstract:Ionomeric polymers are a class of Electromechanical Transducer consisting of an ionomeric substrate with metal-plated electrodes. Application of a low-voltage (10 Hz), but this effect is small compared to the increase in strain produced by maximizing the capacitance. Increasing capacitance produces a Transducer that is able to achieve >2% strain (ε) at voltage levels of ±3 V. © 2005 Elsevier B.V. All rights reserved.
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High-Strain Ionomeric-Ionic Liquid Composites via Electrode Tailoring
Aerospace, 2004Co-Authors: Barbar J Akle, Matthew D BennettAbstract:Ionomeric polymers are a class of Electromechanical Transducer consisting of an ionomeric substrate with metal-plated electrodes. Application of a low voltage ( 10 Hz) but this effect is small compared to the increase in strain produced by maximizing the capacitance. Increasing capacitance produces a Transducer that is able to achieve > 2% strain at voltage levels of +/- 3 V.© 2004 ASME
Matthew D Bennett - One of the best experts on this subject based on the ideXlab platform.
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High-strain ionomeric-ionic liquid electroactive actuators
Sensors and Actuators A-physical, 2006Co-Authors: Barbar J Akle, Matthew D BennettAbstract:Abstract Ionomeric polymers are a class of Electromechanical Transducer consisting of an ionomeric substrate with metal-plated electrodes. Application of a low-voltage ( 10 Hz), but this effect is small compared to the increase in strain produced by maximizing the capacitance. Increasing capacitance produces a Transducer that is able to achieve >2% strain (ɛ) at voltage levels of ±3 V.
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High-strain ionomeric-ionic liquid electroactive actuators
Sensors and Actuators A: Physical, 2006Co-Authors: Barbar J Akle, Matthew D Bennett, Donald J L LeoAbstract:Ionomeric polymers are a class of Electromechanical Transducer consisting of an ionomeric substrate with metal-plated electrodes. Application of a low-voltage (10 Hz), but this effect is small compared to the increase in strain produced by maximizing the capacitance. Increasing capacitance produces a Transducer that is able to achieve >2% strain (ε) at voltage levels of ±3 V. © 2005 Elsevier B.V. All rights reserved.
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High-Strain Ionomeric-Ionic Liquid Composites via Electrode Tailoring
Aerospace, 2004Co-Authors: Barbar J Akle, Matthew D BennettAbstract:Ionomeric polymers are a class of Electromechanical Transducer consisting of an ionomeric substrate with metal-plated electrodes. Application of a low voltage ( 10 Hz) but this effect is small compared to the increase in strain produced by maximizing the capacitance. Increasing capacitance produces a Transducer that is able to achieve > 2% strain at voltage levels of +/- 3 V.© 2004 ASME
Dimitri Galayko - One of the best experts on this subject based on the ideXlab platform.
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Optimization and AMS modeling of capacitive vibration harvester
2017Co-Authors: Dimitri Galayko, Ayyaz Mahmood Paracha, Rodrigo Pizarro, Philippe Basset, Gilles AmendolaAbstract:This paper presents optimization, design and modeling of a conditionning circuit of a vibrational energy harvester with capacitive Electromechanical Transducer. The conditionning circuit is inspired from the Buck DC-DC converter architecture, and composed from a charge pump and a flyback circuit. We found that the switching should be ordered by the internal state of the circuit, an not by some fixed timing scenario. The paper presents how to find the optimal operation mode of the harvester. To validate the study, the system was modeled using a mixed VHDL-AMS - ELDO model.
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Electromechanical coupling in electrostatic kinetic energy harvesters
2016 IEEE International Conference on Electronics Circuits and Systems (ICECS), 2016Co-Authors: Eoghan O'riordan, Elena Blokhina, Dimitri GalaykoAbstract:Almost all kinetic energy harvester (KEHs) are inherently nonlinear. In addition, most practical systems introduce supplementary nonlinearity to improve their performance. Qualitatively and quantitatively understanding the nonlinear behaviour in these devices can highlight important parameters with regard to optimisation and design. Capacitive energy harvesters require an initial electrical bias, resulting in Electromechanical coupling. Thus, the Electromechanical Transducer force is present in all capacitive harvesters. It is the cause of numerous well studied phenomena, such as the modification of the resonant frequency, for alternative bias voltages. The effects of the coupling in two of the most common conditioning circuit configurations has been described and compared with experimental results. Furthermore, semi-analytical analysis of the coupled systems has been completed, giving further insight into the behaviour and potential optimisations.
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The limiting effect of Electromechanical coupling in self-biased electrostatic Vibration Energy Harvester
2015 Symposium on Design Test Integration and Packaging of MEMS MOEMS (DTIP), 2015Co-Authors: A. Karami, Andrii Dudka, Dimitri Galayko, F. Marty, Philippe BassetAbstract:This paper reports on the drastic impact of the Electromechanical coupling on the operating mode of a MEMS electrostatic Vibration Energy Harvester (e-VEH). A similar behavioral pattern was observed for two different conditioning circuits, which biased the e-VEH: one based on a classical charge pump circuit and one based on the Bennet doubler. The result of this study mitigates the commonplace opinion about the need of maximization of the bias voltage of Electromechanical Transducer for optimization of the converted power. When the circuits operated in self-biasing mode, in which the reservoir capacitor voltage increases exponentially for weak voltages, a slow down and saturation were consequently observed at average and high voltages. It is due to several phenomena, among which the nonlinear dynamics of the system, increase of the Electromechanical damping with bias voltage, and basically by the fundamental limitation of the power that can be extracted from external vibrations.
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Non-linear MEMS electrostatic kinetic energy harvester with a tunable multistable potential for stochastic vibrations
2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors Actuators and Microsystems (TRANSDUCERS & EUROSENSORS X, 2013Co-Authors: Francesco Cottone, Philippe Basset, R. Guillemet, Dimitri Galayko, Frederic Marty, Tarik BourouinaAbstract:We report on the first electrostatic Vibration Energy Harvester (e-VEH) using a voltage-controlled multi-stable energy potential in order to harvest energy from stochastic vibration noise. We show that an optimized pre-charge voltage on the Electromechanical Transducer associated with a displacement constraint of the movable mass leads to a triple-well potential. This condition enhances the energy harvesting efficiency of wideband vibrations. Measurements were performed on a MEMS e-VEH with a band-limited colored noise.
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Wideband MEMS electrostatic vibration energy harvesters based on gap-closing interdigited combs with a trapezoidal cross section
2013 IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS), 2013Co-Authors: R. Guilllemet, Francesco Cottone, Philippe Basset, Dimitri Galayko, F. Marty, Tarik BourouinaAbstract:This paper deals with a fully batch-processed MEMS electrostatic Vibration Energy Harvster (e-VEH) having a half-power frequency bandwidth of more than 30 % thanks to the combination of electrostatic and mechanical non-linearities. The Electromechanical Transducer is made of bulk-silicon gap-closing interdigited combs with a trapezoidal cross section. Up to 2.2 μW have been harvested at atmospheric pressure for an external acceleration of 1 G at 150 Hz.
Philippe Basset - One of the best experts on this subject based on the ideXlab platform.
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Optimization and AMS modeling of capacitive vibration harvester
2017Co-Authors: Dimitri Galayko, Ayyaz Mahmood Paracha, Rodrigo Pizarro, Philippe Basset, Gilles AmendolaAbstract:This paper presents optimization, design and modeling of a conditionning circuit of a vibrational energy harvester with capacitive Electromechanical Transducer. The conditionning circuit is inspired from the Buck DC-DC converter architecture, and composed from a charge pump and a flyback circuit. We found that the switching should be ordered by the internal state of the circuit, an not by some fixed timing scenario. The paper presents how to find the optimal operation mode of the harvester. To validate the study, the system was modeled using a mixed VHDL-AMS - ELDO model.
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The limiting effect of Electromechanical coupling in self-biased electrostatic Vibration Energy Harvester
2015 Symposium on Design Test Integration and Packaging of MEMS MOEMS (DTIP), 2015Co-Authors: A. Karami, Andrii Dudka, Dimitri Galayko, F. Marty, Philippe BassetAbstract:This paper reports on the drastic impact of the Electromechanical coupling on the operating mode of a MEMS electrostatic Vibration Energy Harvester (e-VEH). A similar behavioral pattern was observed for two different conditioning circuits, which biased the e-VEH: one based on a classical charge pump circuit and one based on the Bennet doubler. The result of this study mitigates the commonplace opinion about the need of maximization of the bias voltage of Electromechanical Transducer for optimization of the converted power. When the circuits operated in self-biasing mode, in which the reservoir capacitor voltage increases exponentially for weak voltages, a slow down and saturation were consequently observed at average and high voltages. It is due to several phenomena, among which the nonlinear dynamics of the system, increase of the Electromechanical damping with bias voltage, and basically by the fundamental limitation of the power that can be extracted from external vibrations.
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Non-linear MEMS electrostatic kinetic energy harvester with a tunable multistable potential for stochastic vibrations
2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors Actuators and Microsystems (TRANSDUCERS & EUROSENSORS X, 2013Co-Authors: Francesco Cottone, Philippe Basset, R. Guillemet, Dimitri Galayko, Frederic Marty, Tarik BourouinaAbstract:We report on the first electrostatic Vibration Energy Harvester (e-VEH) using a voltage-controlled multi-stable energy potential in order to harvest energy from stochastic vibration noise. We show that an optimized pre-charge voltage on the Electromechanical Transducer associated with a displacement constraint of the movable mass leads to a triple-well potential. This condition enhances the energy harvesting efficiency of wideband vibrations. Measurements were performed on a MEMS e-VEH with a band-limited colored noise.
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Wideband MEMS electrostatic vibration energy harvesters based on gap-closing interdigited combs with a trapezoidal cross section
2013 IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS), 2013Co-Authors: R. Guilllemet, Francesco Cottone, Philippe Basset, Dimitri Galayko, F. Marty, Tarik BourouinaAbstract:This paper deals with a fully batch-processed MEMS electrostatic Vibration Energy Harvster (e-VEH) having a half-power frequency bandwidth of more than 30 % thanks to the combination of electrostatic and mechanical non-linearities. The Electromechanical Transducer is made of bulk-silicon gap-closing interdigited combs with a trapezoidal cross section. Up to 2.2 μW have been harvested at atmospheric pressure for an external acceleration of 1 G at 150 Hz.
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Design of controller IC for asynchronous conditioning circuit of an electrostatic vibration energy harvester
Proceedings - 2012 IEEE Int. Conf. on Green Computing and Communications GreenCom 2012 Conf. on Internet of Things iThings 2012 and Conf. on Cyber Phy, 2012Co-Authors: Andrii Dudka, Dimitri Galayko, Philippe BassetAbstract:This paper presents a transistor-level design of a power management electrical circuit for asynchronous electrostatic energy harvester. The conditioning circuit of the harvester is based on a charge pump and a fly back circuits. The designed power management block implements the concept of adaptive behaviour of energy harvester, allowing it to operate in an optimal mode in environment where the magnitude of the vibrations may change in time. For the first time, such a system is designed to operate at high voltage (up to 30 V). However, this paper does not concern the design of Electromechanical Transducer. The IC design has been carried out in 0.35um high-voltage CMOS technology, and has been validated by a coupled VHDL-AMS/SPICE simulation. The control system average power consumption is less then 0.9uW, whereas the average harvested power is approximately 1.1uW for 14V operation voltage.