Dr. Philippe Bouchilloux Profile

Dr. Philippe Bouchilloux

Hardware Engineering at Google, Inc.

SPIE Involvement:

Author

Publications (13)

Proceedings Article | 29 July 2004 Paper

Amplified piezoelectric actuators: from aerospace to underwater applications

Philippe Bouchilloux, Frank Claeyssen, Ronan Le Letty

Proceedings Volume 5388, (2004) https://doi.org/10.1117/12.540781

KEYWORDS: Actuators, Aerospace engineering, Space telescopes, Ceramics, Sensors, Ultrasonics, Telescopes, Vibration control, Nondestructive evaluation, Satellites

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Proceedings Article | 14 August 2003 Paper

Application of amplified piezoelectric actuators to the construction of gas valves

Philippe Bouchilloux, Ronan Le Letty, Nicolas Lhermet, G. Patient, Frank Claeyssen, M. Lang

Proceedings Volume 5054, (2003) https://doi.org/10.1117/12.483890

KEYWORDS: Actuators, Computer aided design, Finite element methods, Computational fluid dynamics, Amplifiers, Frequency modulation, Aerospace engineering, Fluid dynamics, Control systems, Switching

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Proceedings Article | 5 August 2003 Paper

Finite element modeling and optimization of tube-shaped ultrasonic motors

Philippe Bouchilloux, Serra Cagatay, Kenji Uchino, Burhanettin Koc

Proceedings Volume 5056, (2003) https://doi.org/10.1117/12.483499

KEYWORDS: Finite element methods, Ultrasonics, Genetic algorithms, Genetics, Metals, Optimization (mathematics), Chemical elements, Binary data, Phase modulation, Ferroelectric materials

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Proceedings Article | 10 July 2002 Paper

Application of the genetic optimizaton method to the design of ultrasonic motors

Philippe Bouchilloux, Kenji Uchino

Proceedings Volume 4693, (2002) https://doi.org/10.1117/12.475250

KEYWORDS: Ultrasonics, Genetic algorithms, Finite element methods, Genetics, Electromechanical design, Ceramics, Actuators, Interfaces, Metals, Prototyping

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Proceedings Article | 21 August 2001 Paper

Finite element modeling of smart materials: application to an adaptive structure using SMA

Anne-Christine Hladky-Hennion, Solofonirina Rafanomezantsoa, Lionel Buchaillot, Philippe Bouchilloux

Proceedings Volume 4326, (2001) https://doi.org/10.1117/12.436467

KEYWORDS: Shape memory alloys, Smart materials, Finite element methods, Chemical elements, Statistical analysis, Statistical modeling, Chromium, Actuators, Atrial fibrillation, Transducers

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Proceedings Article | 14 June 2001 Paper

Mechanisms based on piezoactuators

Frank Claeyssen, Ronan Le Letty, Francois Barillot, Nicolas Lhermet, H. Fabbro, Philippe Guay, Mickael Yorck, Philippe Bouchilloux

Proceedings Volume 4332, (2001) https://doi.org/10.1117/12.429660

KEYWORDS: Actuators, Biomedical optics, Optics manufacturing, Magnetic resonance imaging, Manufacturing, Ultrasonics, Astronomical imaging, Electromagnetic interference, X-ray diffraction, Space operations

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Proceedings Article | 22 June 2000 Paper

Design and experimental evaluation of a piezoelectric XY stage

Francois Barillot, Ronan Le Letty, Frank Claeyssen, Nicolas Lhermet, Mickael Yorck, Philippe Bouchilloux

Proceedings Volume 3985, (2000) https://doi.org/10.1117/12.388826

KEYWORDS: Actuators, Sensors, Finite element methods, Computer aided design, Shape memory alloys, Temperature metrology, Prototyping, Interferometers, Particles, Electronics

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Proceedings Article | 12 June 2000 Paper

Piezoelectric actuators and motors based on shell structures

Frank Claeyssen, Nicolas Lhermet, Ronan Le Letty, Francois Barillot, Miguel Debarnot, Marc Six, Georges Thomin, Michel Privat, Philippe Bouchilloux

Proceedings Volume 3991, (2000) https://doi.org/10.1117/12.388162

KEYWORDS: Actuators, Ultrasonics, Ceramics, Aerospace engineering, Finite element methods, Standards development, Metals, Structural design, Piezoelectric drives, Astronomical imaging

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Proceedings Article | 9 June 1999 Paper

Semipassive and semiactive vibration control using new amplified piezoelectric actuators

H. Bruneau, Ronan Le Letty, Frank Claeyssen, Francois Barillot, Nicolas Lhermet, Philippe Bouchilloux

Proceedings Volume 3668, (1999) https://doi.org/10.1117/12.350757

KEYWORDS: Actuators, Capacitance, Amplifiers, Electromechanical design, Vibration control, Dielectrics, Inductance, Device simulation, Velocity measurements, Power supplies

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Proceedings Article | 27 July 1998 Paper

New linear piezomotors for high-force precise positioning applications

Ronan Le Letty, Frank Claeyssen, Francois Barillot, Marc Six, Philippe Bouchilloux

Proceedings Volume 3329, (1998) https://doi.org/10.1117/12.316944

KEYWORDS: Interfaces, Ultrasonics, Electromagnetism, Prototyping, Actuators, Piezoelectric effects, Power supplies, Aerospace engineering, Optical resolution, Electromechanical design

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Proceedings Article | 27 July 1998 Paper

Micromotors using magnetostrictive thin films

Frank Claeyssen, Ronan Le Letty, Francois Barillot, Jochen Betz, Ken MacKay, Dominique Givord, Philippe Bouchilloux

Proceedings Volume 3329, (1998) https://doi.org/10.1117/12.316949

KEYWORDS: Magnetism, Thin films, Teeth, Prototyping, Magnetostrictive materials, Silicon, Ultrasonics, Sputter deposition, Control systems, Chromium

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Proceedings Article | 17 June 1998 Paper

Electromagnetic stress sensor and its applications: monitoring bridge cables and prestressed concrete structures

Nicolas Lhermet, Frank Claeyssen, Philippe Bouchilloux

Proceedings Volume 3325, (1998) https://doi.org/10.1117/12.310619

KEYWORDS: Sensors, Magnetism, Magnetic sensors, Bridges, Prototyping, Electromagnetism, Control systems, Temperature metrology, Environmental sensing, 3D modeling

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Proceedings Article | 6 June 1997 Paper

New amplified piezoelectric actuator for precision positioning and active damping

Ronan Le Letty, Frank Claeyssen, Nicolas Lhermet, Philippe Bouchilloux

Proceedings Volume 3041, (1997) https://doi.org/10.1117/12.275673

KEYWORDS: Actuators, Electromechanical design, Amplifiers, Piezoelectric effects, Interferometers, Resistors, Optical amplifiers, Mirrors, Finite element methods, Dielectrics

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Two typical characteristics of direct piezoelectric actuators are displacements of ten micrometers and high stiffnesses. Recently, multilayer actuators have been improved, and they now display strains of approximately 1200 ppm at low excitation levels (less than two hundred volts). Thus, they are well suited to perform precise positioning of optical devices. But for industrial needs, this performance is still insufficient for positioning devices with larger displacements (in the range of several hundred micrometers). Numerous designs of mechanical amplifier devices based on the use of flexural hinges have been proposed. Due to their low stiffness, these devices cannot be used in space applications because they would not survive during takeoff. The amplified piezoelectric actuator which we designed and tested, eliminated the low stiffness drawback and ensures good force transmission. Due to the stiffness of the amplifier, the efficiency of the electromechanical transduction is significantly higher than those of conventional amplifier mechanisms. To design this actuator, we performed a numerical finite element simulation that included the piezoelectric effect. Among other things, this model shows the displacement as a function of the excitation and the electrical admittance. The static and the dynamic behaviors were determined. The main features of the actuator are a no-load displacement of 180 micrometers and stiffness of 5 N/m. These characteristics were experimentally verified using an electromechanical test bench including a laser Doppler interferometer, thus confirming the design method. Technological aspects, like the compressive force applied to the piezoelectric material, were considered. Many applications for this amplified actuator already exist. For example, an active mechanism using this actuator can be used to tilt a mirror. Another application of the amplified actuator is in the field of active damping of structures. In this case, the actuator is connected to a resistive shunt so that electrical damping is obtained through the direct piezoelectric effect. The experimental results show that the actuator is interesting because of its high electromechanical coupling, and, consequently, its ability to perform active damping.

Showing 5 of 13 publications

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