| 1. | Layout 1 |
| | Today, our researchers are gearing up for a new generation of instruments, based on new materials and approaches (silicon, piezoelectric, cold atoms, etc.). But our objectives are still the same : support new applications, enhance miniaturization and accuracy, and keep lowering costs.... |
| |
| 2. | Actuateurs et senseurs électro-actifs - Offre technologique Onera |
| | Combination of piezoelectric (electrical field action) and composite material (mechanical couplings and lightness) properties.... |
| |
| 3. | le 15-11 - 2003 indd |
| | Second day SHM with piezoelectrics, by P. Guy Electromechanical impedance technique, passive and active acousto-ultrasonics Vibration-based techniques for SHM, by C.-P. Fritzen Basic concepts, measurement data, sensor positioning, model-based techniques, damage detection, localization and quantification, examples of aeronautics and civil structures Third day Visit of ONERA labs Piezoelectric and electromagnetic techniques for SHM SHM with fiber optic sensors, by A. Güemes Classification of fibre optic sensors, Bragg Grating (FBG) as strain and temperature sensors, structures with embedded FBG, examples of aeronautics, naval and civil structures.... |
| |
| 4. | Electro Active Actuators and Sensors - Onera's Technological Offer |
| | Combination of piezoelectric (electrical field action) and composite material (mechanical couplings and lightness) properties.... |
| |
| 5. | Experimental validation of a flap actuator for helicopter blades - ONERA / DADS-EN |
| | A full scale adaptable flap actuator model was made by Onera (figures 1 and 2). It includes a standard actuator based on using prestressed piezoelectric stacks.... |
| |
| 6. | Miniature Vibrating Inertial Sensors - ONERA / DMPH-EN |
| | The concepts retained, in monolithic and planar sensor configurations, are of the Mems type and the sensors are made today in quartz, a piezoelectric crystal with excellent mechanical properties and whose piezoelectric character makes it possible to create very easily the excitations and useful vibration detections involved in this type of sensor (the gold-plated zones on the crystal correspond to the excitation and vibration detection electrodes).... |
| |
| 7. | Design and Qualification of Rotating Wing Models : Active helicopter blades - ONERA / DADS-EN |
| | The actuation principle retained by Onera is based on the use of piezoelectric fiber patches available in the market, and one of the main practical difficulties concerns the isolation of the actuators, supplied at - 500 / + 1500 V. The demonstrator structure (figure 1) was designed with the help of numerical simulation (figure 2), and the simulation results were then compared with the first experimental measurements in the laboratory.... |
| |
| 8. | VIG quartz vibrating gyro - ONERA / DMPH-EN |
| | Building on the acquired know-how in the development of the VIA accelerometer, a gyro structure was defined for which the major advantage resides in the extremely high decoupling of the useful vibrations from the structural attachment in its sealed casing (the quality coefficients of the modes used are of the order of 150,000). The Coriolis information thus remains totally contained in the mechanical vibration of the crystal detector mode and is converted directly by piezoelectric effect into electric charges representative of the speed of rotation to be measured.... |
| |
| 9. | Today's research on Miniature Vibrating Inertial Sensors - ONERA / DMPH-EN |
| | Today's research is oriented toward : use of new piezoelectric materials for both accelerometers and gyros.... This work is based on the specific characteristics (piezoelectric, thermo-elastic, or other) of these materials and on configurations making it possible to use the performance. miniaturization and integration of vibrating Mems.... |
| |
| 10. | No title |
| | Physics, Instrumentation and Sensing DepartmentPt / AlN / Pt Piezoelectric Transducer for Unsteady Pressure Sensor in Rotating Machines. In studying rotating machinery flows, experimenters want to be able to evaluate pressure fluctuations on both the blade surfaces and the casing using a type of measurement that will avoid having to machine the parts and that will not disturb the flows either.. |
| |
