Results 201 to 210 of about 7,594 (251)
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Multilayer piezoelectric stack actuator characterization
SPIE Proceedings, 2008Future 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 +6 more
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Advanced piezoelectric–ferroelectric stack actuator
Sensors and Actuators A: Physical, 2009Abstract 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, 1998Changes 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, 2004A 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 +2 more
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Compact piezoelectric stacked actuators for high power applications
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2000Small, 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 +4 more
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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 +2 more
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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 +2 more
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Simulation model of the piezoelectric stack actuator
Proceedings of the 13th International Carpathian Control Conference (ICCC), 2012Piezoactuators become a perspective component for micromechanics and active vibration control. The piezoactuator as a microdrive operates on the principle of the reverse piezoelectric effect. Mechanical properties of the piezoactuators are as follows: high frequency range of operation, small travel range and large applied force.
Jaroslav Los, Jaromir Zavadil, Jiri Tuma
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Actuators using piezoelectric stacks and displacement enhancers
SPIE Proceedings, 2015Actuators are used to drive all active mechanisms including machines, robots, and manipulators to name a few. The actuators are responsible for moving, manipulating, displacing, pushing and executing any action that is needed by the mechanism. There are many types and principles of actuation that are responsible for these movements ranging from ...
Yoseph Bar-Cohen +6 more
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Comparison of piezoelectric and electrostrictive actuator stacks
SPIE Proceedings, 1992Piezoelectrics have been around for decades as acoustic or sensing components. In the last few years, however, they have seen increasing use as means to provide motion and control in the micron realm, well below the resolution level of mechanical or electromechanical devices. Their high hysteresis (15 - 20%), however, was a problem in some systems, and
John Galvagni, Bharat S. Rawal
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Piezomechanics characteristics study of piezoelectric stack actuator
Materials Research Innovations, 2014This paper presents the design, implementation and experiments of piezoelectric stack actuator under simulating operating conditions. The piezomechanical characteristics are investigated including hysteresis of displacement, creep, stiffness and force generated.
K. Zheng, X. H. Dong, X. Tian
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