Results 251 to 260 of about 51,991 (302)

Piezoelectric multilayer actuator life test

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2011
Potential NASA optical missions such as the Space Interferometer Mission require actuators for precision positioning to accuracies of the order of nanometers. Commercially available multilayer piezoelectric stack actuators are being considered for driving these precision mirror positioning mechanisms. These mechanisms have potential mission operational
Stewart, Sherrit, Xiaoqi, Bao, Christopher M, Jones, Jack B, Aldrich, Chad J, Blodget, James D, Moore, John W, Carson, Renaud, Goullioud   +7 more
openaire   +2 more sources

Analysis of Beams with Piezoelectric Actuators

Applied Mathematics and Mechanics, 2001
Based on the two-dimensional constitutive relationships of the piezoelectric material, an analytical solution for an intelligent beam excited by a pair of piezoelectric actuators is derived. With the solution the force and moment generated by two piezoelectric actuators and a pair of piezoelectric actuator/sensor are obtained.
Lin, Qirong, Liu, Zhengxing, Wang, Zongli   +2 more
openaire   +2 more sources

Piezoelectric actuators in micropositioning

Engineering Science & Education Journal, 2001
Micromachines can be built only with the aid of other machines that have micropositioning abilities. Fast and precise positioning devices are needed to increase reliability and speed in the production of the miniaturized devices. Intensive research effort has been devoted to developing new technologies for actuators and sensors.
Pozzi M, King T
openaire   +2 more sources

Piezoelectric membrane actuator design

2011 12th Intl. Conf. on Thermal, Mechanical & Multi-Physics Simulation and Experiments in Microelectronics and Microsystems, 2011
This paper presents the study of piezoelectric actuators. After the description of simulated actuators and simulation conditions, results will be discussed to define the best actuator design in terms of membrane displacement and compactness. The actuator behaviour under temperature variation is also checked.
Casset, F., Cueff, M., Defay, E., Le Rhun, G., Suhm, A., Ancey, P., Devos, Arnaud   +6 more
openaire   +2 more sources

Piezoelectric actuators 2006

Journal of Electroceramics, 2007
Piezoelectric actuators have been commercialized in various areas such as information technology, robotics, bio-, medical engineering, ecological and energy engineering. This paper reviews their recent application developments and foresees the future of piezoelectric actuators.
openaire   +1 more source

Piezoelectric T-Beam Actuators

Journal of Mechanical Design, 2011
This paper develops models, fabricates, experimentally tests, and optimizes a novel piezoelectric T-beam actuator. With a T-shaped cross-section, and bottom and top flanges and web electrodes, a cantilevered beam can bend in both in-plane and out-of-plane directions upon actuation.
Hareesh K. R. Kommepalli, Kiron Mateti, Christopher D. Rahn, Srinivas A. Tadigadapa   +3 more
openaire   +1 more source

Piezoelectrically actuated droplet ejector

Review of Scientific Instruments, 1997
This article presents a novel piezoelectric fluid ejector that is based on a variation of the design of a flextensional transducer that excites axisymmetric resonant modes in a clamped circular membrane. The transducer is made by bonding a thin piezoelectric ring to a thin, fully supported, circular membrane.
Gökhan Perçin, Laurent Levin, Butrus T. Khuri-Yakub   +2 more
openaire   +1 more source

V-stack piezoelectric actuator

SPIE Proceedings, 2001
Aeroelastic control of wings by means of a distributed, trailing-edge control surface is of interest with regards to maneuvers, gust alleviation, and flutter suppression. The use of high energy density, piezoelectric materials as motors provides an appealing solution to this problem. A comparative analysis of the state of the art actuators is currently
Emil V. Ardelean, Robert L. Clark
openaire   +1 more source

Piezoelectrically Actuated Tunable Capacitor

Journal of Microelectromechanical Systems, 2006
This paper describes the design, fabrication, and characterization of the first MEMS piezoelectric tunable capacitors employing zinc oxide (ZnO) actuation. Relatively simple design rules for the device-structure optimization for largest deflection are shown from simulation results based on theoretical equations.
C.-Y. Lee, E.S. Kim
openaire   +1 more source

Plane ultrasonic piezoelectric actuators

Conference Record of the Power Conversion Conference - Yokohama 1993, 2002
Two prototypes of plane ultrasonic piezoelectric actuators were experimentally constructed, and the fundamental characteristics were measured. The vibration mode of actuators was also analyzed by ANSYS, and compared with the experimental results.
N. Hoshi, A. Kawamura
openaire   +1 more source