Results 201 to 210 of about 7,615 (258)

Sensorless model-based displacement estimator for piezoelectric actuator through a practical three-stage mechanism. [PDF]

Heliyon
Dror AL, Shapiro A.
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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
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Piezoelectric stack actuator life test

2011 Aerospace Conference, 2011
Future NASA interferometer missions require actuators for precision positioning to accuracies of the order of nanometers. For this purpose, commercially available multilayer piezoelectric stack actuators are being considered for driving these precision positioning mechanisms.
Stewart Sherrit, null Xiaoqi Bao, Christopher M. Jones, Jack B. Aldrich, Chad J. Blodget, James D. Moore, John W. Carson, Renaud Goullioud, Bruno Jau   +8 more
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Multilayer piezoelectric stack actuator characterization

SPIE Proceedings, 2008
Future NASA missions are increasingly seeking to use actuators for precision positioning to accuracies of the order of fractions of a nanometer. For this purpose, multilayer piezoelectric stacks are being considered as actuators for driving these precision mechanisms.
Stewart Sherrit, Christopher M. Jones, Jack B. Aldrich, Chad Blodget, Xioaqi Bao, Mircea Badescu, Yoseph Bar-Cohen   +6 more
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Advanced piezoelectric–ferroelectric stack actuator

Sensors and Actuators A: Physical, 2009
Abstract A conceptual design and an operational algorithm for an advanced piezoelectric–ferroelectric stack actuator are developed. The actuator takes advantage of the large strains due to the domain-switching phenomenon and utilizes the nonlinear range of response of the ferroelectric material.
Uri Kushnir, Oded Rabinovitch
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Durability Properties of Piezoelectric Stack Actuator

Japanese Journal of Applied Physics, 1998
Changes of temperature were measured for stack actuators having various values of E c and bending strength. The increase of temperature was 75°C in the center of low E c stack for a starting environment temperature of 120°C with 130 Hz driving frequency.
Takenobu Sakai, Hiroshi Kawamoto
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High Performance ‘‘V-stack’’ Piezoelectric Actuator

Journal of Intelligent Material Systems and Structures, 2004
A comparative analysis of the state-of-the-art actuators is conducted. A new piezoelectric actuator design is presented. It is compact, simple, sturdy, and leverages stroke geometrically with minimum force penalties. The ‘‘V-stack Piezoelectric Actuator’’ consists of a base, a lever, two piezoelectric stacks, and a pretensioning element.
Emil V. Ardelean, Daniel G. Cole, Robert L. Clark   +2 more
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Compact piezoelectric stacked actuators for high power applications

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2000
Small, hollow, multilayer actuators with a diameter of 3 mm were fabricated by the stacking method from piezoelectric hard lead zirconate titanate (PZT) ceramics. Langevin vibrators were also constructed with the hollow multilayer actuators. The performance capabilities of the actuator and Langevin vibrator samples were examined under high-power ...
K, Yao, K, Uchino, Y, Xu, S, Dong, L C, Lim   +4 more
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A novel microgripper hybrid driven by a piezoelectric stack actuator and piezoelectric cantilever actuators

Review of Scientific Instruments, 2016
For the piezo-driven microgripper, one issue is to enlarge the grasping stroke and realize parallel grasping movement in the compact design. Piezoelectric stack actuator (PSA) and piezoelectric cantilever actuator (PCA) are two kinds of typical piezoelectric actuators. In this study, a novel microgripper hybrid driven by a PSA and two PCAs is proposed,
Weilin, Chen, Xianmin, Zhang, Sergej, Fatikow   +2 more
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