FR – Page 31 – TechConnect Briefs

Numerical Simulation of Boiling in a Porous Medium by Using Two-Phase Approach

Bourbon C., Milisic V., MASTER-ENSCPB Laboratory, FR

The paper presents the results of a numerical study of heat and mass exchanges inside a porous matrix. The porous medium is in contact with a solid surface heated over boiling point and steeped in [...]

Analytical Modeling of Beam Behavior Under Different Actuations

Sarraute E., Dufour I., URA CNRS 1375, FR

The aim of this paper is to establish simple analytical equations of the beam deflection for different actuation methods (magnetic with current, magnetic with magnet, electrostatic and piezoelectric). The analytical formulae are obtained from the [...]

Modeling a Piezoelectric Actuator Using a Transformer Equivalent Circuit

Oms-Elisabelar F., Bergaud C., Nicu L., Martinez A., CNRS, FR

In this paper, we describe both the static and dynamic behaviors of an AFM-like piezoelectric actuator using a transformer equivalent circuit in which both the electrical and mechanical portions are represented by electrical equivalencies. The [...]

Numerical and Analytical Modeling of the Piezoelectric Transformer and Experimental Verification

Hallaert S., Sarraute E., Le Pioufle B., URA CNRS 1375, FR

In this paper, to approach the modeling aspect, we have selected a Rosen-type structure of piezo-electric transformer which, for us, seems very interesting from an educational point of view. Two approaches will be presented, (i) [...]

State of the Art and Trends in Power Integration

Sanchez J.-L., LAAS/CNRS, FR

A review of some approaches currently used to integrate power electronic functions is presented. In the field of power electronic, semiconductor devices are used in energy control and conversion circuits. The power function (switching or [...]

High Performance Magnetic Field Smart Sensor Arrays with Source Separation

Paraschiv-Ionescu A., Jutten C., Ionescu A.M., Paraschiv-Ionescu A., Chovet A., Rusu A., LIS, FR

A new approach to design high performance microsystems is proposed. It is based on the association between a low-cost sensor array and a multidimensional signal processing technique: the so-called 'blind source separation'. In order to [...]

Microwave Short-Range Interferometric Radar

Benlarbi-Delapï A., Cousin J.C., Ringot R., Mamouni A., Leroy Y., IEMN-UMR-CNRS, FR

A contactless short range sensor based on microwave interferometry is aWe to determine the distance to a reflecting area which is perpendicular to the bore sights of the transmitting and receiving antennas. If this condition [...]

Opto-Electro-Mechanical model for MOEMS

Jacquemod G., Vuorinen K., Gaffiot F., Spisser A., Seassal C., Leclercq J-L, Rojo-Romeo P, Viktorovitch P., Laine J-P, Ledantec R., Benyattou T., Ecole Centrale de Lyon, FR

A highly selective and widely tunable optical filter based on MOEMS technology at 1.55 gm using a Fabry-Perot resonator with micromachined InP-air gap distributed Bragg reflectors has been designed and fabricated in our laboratory. The [...]

Unsteady Gaseous Flows in Tapered Microchannels

Aubert C., Colin S., Caen R., Laboratoire de Genie Mecanique de Toulouse, FR

The aim of the paper is to contribute to the modeling of unsteady slip flows in rectangular microchannels with slowly varying cross-sections. A model is proposed for a microdiffuser submitted to sinusoidal pressure fluctuations at [...]

From Layout to System Simulation: An Example of an Oxygen Sensor

Camon H., Djafari-Rouhani M., Gué A.M., Dilhan M., Alonso C., Jammes B., LAAS/CNRS, FR

The development of microsystems has shown that the technologies and tools are mature enough to investigate the possibilities of complete CAD tools, as is the case in integrated circuit design. An oxygen sensor has been [...]