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Laboratoire d’analyse et d’architecture des systèmes

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139documents trouvés

17105
30/03/2017

Methodology of modeling of the internal activity of a FPGA for conducted emission prediction purpose

C.GHFIRI, A.BOYER, A.DURIER, S.BEN DHIA

ESE, IRT

Manifestation sans acte : Congrès de l'école Doctorale GEET ( ) 2017 du 30 mars au 30 mars 2017, Toulouse (France), Mars 2017, 6p. , N° 17105

Lien : https://hal.archives-ouvertes.fr/hal-01500303

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This paper describes a new methodology of construction of the internal activity block of an ICEM-CE model of an FPGA based on a predictive approach

139623
17061
27/02/2017

Etude des couplages substrats dans des circuits mixtes "Smart Power" pour applications automobiles

V.TOMASEVIC

ESE

Doctorat : INSA de Toulouse, 27 Février 2017, 226p., Président: E.SICARD, Rapporteurs: G.DUCHAMP, M.RAMDANI, Examinateurs: T.BOUSQUET, R.ISKANDER, Directeurs de thèse: S.BEN DHIA, A.BOYER , N° 17061

Lien : https://hal.laas.fr/tel-01499417

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Abstract

Smart Power circuits, used in the automotive industry, are characterized by the integration on one chip of the power parts with low voltage analog and digital parts. Their main weak point comes from the switching of power structures on inductive loads. These inject parasitic currents in the substrate, capable of activating the bipolar parasitic structures inherent in the layout of the circuit, leading to failure or destruction of the integrated circuit. These parasitic structures are not currently integrated into CAD tools nor simulated by SPICE simulators. The extraction of these structures from the layout and their integration into the CAD tools is the objective of the European AUTOMICS project, in which this thesis is carried out. The characterization of the substrate coupling of two case study was used to validate theoretical models and compare them to simulations using the new substrate coupling model.

Résumé

Les circuits Smart Power, utilisés dans l’industrie automobile, se caractérisent par l’intégration sur une puce des parties de puissance avec des parties analogiques&numériques basse tension. Leur principal point faible vient de la commutation des structures de puissance sur des charges inductives. Celles-ci injectent des courants parasites dans le substrat, pouvant activer des structures bipolaires parasites inhérentes au layout du circuit, menant à une défaillance ou la destruction du circuit intégré. Ces structures parasites ne sont pas actuellement modélisées dans les outils CAO ni simulées par les simulateurs de type SPICE. L'extraction de ces structures à partir du layout et leur intégration dans les outils CAO est l’objectif du projet européen AUTOMICS, dans le cadre duquel cette thèse a été réalisée. La caractérisation du couplage substrat sur deux cas d’études a permis de valider les modèles théoriques et de les comparer aux simulations utilisant le nouveau modèle de couplage substrat.

Mots-Clés / Keywords
Electronique analogique; Circuits Smart Power; Compatibilité électromagnétique des circuits in; Conception microélectronique; Couplage substrat de puissance; Système de mesure sur puce;

139380
16572
06/12/2016

Self-Powered energy harvester strain sensing device for structural health monitoring

A.ALVAREZ, M.BAFLEUR, J.M.DILHAC, J.COLOMER, D.DRAGOMIRESCU, J.LOPEZ, M.ZHU, P.MIRIBEL

Université de Barcel, ESE, MINC, Exeter

Revue Scientifique : Journal of Physics: Conference Series, Vol.773, 012070p., Décembre 2016, doi:10.1088/1742-6596/773/1/012070 , N° 16572

Lien : https://hal.archives-ouvertes.fr/hal-01497552

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This paper presents an envisaged autonomous strain sensor device, which is dedicated to structural health monitoring applications . The paper introduces the ASIC approach that replaces the discrete approach of some of the main modules.

139454
16572
06/12/2016

Self-Powered energy harvester strain sensing device for structural health monitoring

A.ALVAREZ, M.BAFLEUR, J.M.DILHAC, J.COLOMER, D.DRAGOMIRESCU, J.LOPEZ, M.ZHU, P.MIRIBEL

Université de Barcel, ESE, MINC, Exeter

Manifestation avec acte : International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications ( PowerMEMS ) 2016 du 06 décembre au 09 décembre 2016, Paris (France), Décembre 2016, 4p. , N° 16572

Lien : https://hal.archives-ouvertes.fr/hal-01497552

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Abstract

This paper presents an envisaged autonomous strain sensor device, which is dedicated to structural health monitoring applications . The paper introduces the ASIC approach that replaces the discrete approach of some of the main modules.

139453
16579
06/12/2016

Self-powered adaptive switched architecture storage

F.EL MAHBOUBI, M.BAFLEUR, V.BOITIER, A.ALVAREZ, J.COLOMER, P.MIRIBEL, J.M.DILHAC

ESE, Université de Barcel

Manifestation avec acte : International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications ( PowerMEMS ) 2016 du 06 décembre au 09 décembre 2016, Paris (France), Décembre 2016, 4p. , N° 16579

Lien : https://hal.archives-ouvertes.fr/hal-01497546

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Ambient energy harvesting coupled to storage is a way to improve the autonomy of wireless sensors networks. Moreover, in some applications with harsh environment or when a long service lifetime is required, the use of batteries is prohibited. Ultra-capacitors provide in this case a good alternative for energy storage. Such storage must comply with the following requirements: a sufficient voltage during the initial charge must be rapidly reached, a significant amount of energy should be stored and the unemployed residual energy must be minimised at discharge. To answer these apparently contradictory criteria, we propose a self-adaptive switched architecture consisting of a matrix of switched ultra-capacitors. We present the results of a self-powered adaptive prototype that shows the improvement in terms of charge time constant, energy utilization rate and then energy autonomy.

139620
16576
16/11/2016

Energy harvesting for sensor networks in aeronautics: True lies?

J.M.DILHAC, M.BAFLEUR

ESE

Conférence invitée : Sensors Energy Harvesting Wireless Network & Smart Objects ( Senso Conference ) 2016 du 16 novembre au 18 novembre 2016, Gardanne (France), Novembre 2016, 10p. , N° 16576

Lien : https://hal.archives-ouvertes.fr/hal-01497785

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In recent years, Wireless Sensor Networks (WSN) have been considered for various aeronautical applications, including flight tests during the development of a new aircraft, and Structural Health Monitoring (SHM) during commercial exploitation. Up to now, these implementations use wires inducing a burden of kilometres of additional wiring (300 km on an Airbus A380 for specific sensing during flight test). However, going wireless for communication also requires being wireless for energy: isolated from the on-board electrical network, each sensor node needs to be self-powered. Environmental concerns, together with economical and safety-related issues, often prohibit the use of electrochemical batteries. Fortunately, energy may be harvested in the environment, providing a reliable and sustainable electrical power source… But is this story true? Considering the aircraft environment and the required test procedure for avionics, are technologies mature enough to provide low volume, low mass, reliable and efficient energy harvesting solutions? The purpose of this presentation is to answer this question through examples of hands-on tests in airliners [1] [2].

139613
16435
31/10/2016

A 3U cubesat to investigate erbium doped fiber degradation at low earth orbit

A.FERNANDEZ , O.LLOPIS, N.NOLHIER, C.VIALLON, A.RISSONS, F.DESTIC, S.Lizy-Destrez

MOST, ESE, ISAE

Manifestation avec acte : Avionics and Vehicle Fiber-Optics and Photonics Conference ( AVFOP ) 2016 du 31 octobre au 03 novembre 2016, Long Beach (USA), Octobre 2016, 3p. , N° 16435

Lien : https://hal.archives-ouvertes.fr/hal-01396269

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The next generation of telecommunication satellites operating in the Ku and Ka bands consider radio over optical fiber (RoF) technologies as a good candidate for the future flexible payloads. In this context we have started a 3U nanosatellite dedicated to the qualification of an erbium doped fiber by using an optoelectronic metrology technique. This educational project called NIMPH (Nanosatellite to Investigate Microwave Photonics Hardware) aims to quantify the gain and noise figure degradation due to cosmic ray exposure of this type of fiber during a two years mission at a low earth orbit (LEO).

138349
16580
30/10/2016

A multifunctional device as both strain sensor and energy harvester for structural health monitoring

Z.CHEW, T.RUAN, M.ZHU, M.BAFLEUR, J.M.DILHAC

Exeter, ESE

Manifestation avec acte : IEEE SENSORS 2016 du 30 octobre au 02 novembre 2016, Orlando (USA), Octobre 2016, 4p. , N° 16580

Lien : https://hal.archives-ouvertes.fr/hal-01502753

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In the context of wireless sensors (WSs) autonomous in energy, this paper presents a single macro-fiber composite (MFC) piezoelectric transducer which is used for the first time as a multifunctional device as both sensor and energy harvester in a time-multiplexing manner. The MFC is used as an energy harvester to charge up a storage capacitor. When there is sufficient energy, the WS is powered up and the MFC is used as a sensor. A circuit was implemented to harvest energy from the MFC and use the MFC as a sensor. Experiment validation shows that the MFC has an accuracy of up to 97 % as sensor and the circuit harvests energy from the MFC at its maximum power point with up to 98 % efficiency.

139654
16473
13/10/2016

Energy autonomy of batteryless and wireless embedded systems

J.M.DILHAC, V.BOITIER

ESE

Ouvrage (auteur) : Energy autonomy of batteryless and wireless embedded systems, ISTE Ltd, N°ISBN 9781785481239, Octobre 2016, 176p. , N° 16473

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Abstract

Energy Autonomy of Batteryless and Wireless Embedded Systems covers the numerous new applications of embedded systems that are envisioned in the context of aeronautics, such as sensor deployment for flight tests or for structural health monitoring. However, the increasing burden of on-board cabling requires wireless solutions. Moreover, concerns such as safety or system lifetime preclude the use of electrochemical energy storage. Ambient energy capture, storage and management are therefore key topics. This book presents these concepts and illustrates them through actual implementations in airliners. With five years of experience within this specialist field, the authors present results from actual flight tests via a partnership with Airbus. Basic concepts are summarized, together with practical implementations in airliners, enriching the book through the very specific aspects related to embedded systems deployed in aircraft. This book will appeal to both students and practising engineers in the field.

138519
16568
01/10/2016

Coupling supercapacitors and aeroacoustic energy harvesting for autonomous wireless sensing in aeronautics applications

R.MONTHEARD, M.BAFLEUR, V.BOITIER, X.DOLLAT, N.NOLHIER, E.PIOT, C.AIRIAU, J.M.DILHAC

ESE, I2C, ONERA, IMFT

Revue Scientifique : Energy Harvesting and Systems, Vol.3, N°4, pp.265-276, Octobre 2016 , N° 16568

Lien : https://hal.archives-ouvertes.fr/hal-01497529

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This paper reports for the first time the experimental demonstration of a wireless sensor node only powered by an aeroacoustic energy-harvesting device, meant to be installed on an aircraft outside skin. Aeroacoustic noise is generated on purpose to serve as a means of converting mechanical energy from high velocity airflow into electrical energy. Results related to the physical characterization of the energy conversion process are presented. The proposed aeroacoustic transducer prototype, consisting in a rectangular cavity fitted with a piezoelectric membrane, is shown to deliver up to 2 mW AC power under Mach 0.5 airflow. Optimized power management electronics has been designed to interface with the transducer, including a self-powered Synchronized Switch Harvesting on Inductor (SSHI) interface circuit and an efficient buck-boost DC/DC converter. The design of micropower auxiliary circuits adds functionality while preserving high efficiency. This circuit stores energy in supercapacitors and is able to deliver a net output DC power close to 1 mW. A fully autonomous system has been implemented and tested, successfully demonstrating aeroacoustic power generation by supplying a battery-free wireless datalogger in conditions representative of an actual flight.

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