Results 211 to 220 of about 4,107 (256)
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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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Piezoelectric stack actuator life test
2011 Aerospace Conference, 2011Future 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 +8 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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A multi-piezoelectric structure: the stacked transducer
IEEE 1991 Ultrasonics Symposium, 2002A new piezoelectric structure made of several ceramic plates stacked together is proposed. With such an arrangement a gain in sensitivity can be obtained via constructive addition of the different ceramic signals appropriately delayed. Conversely, a reduction of the pulse duration can be achieved with destructive interference.
L. Chofflet, M. Fink
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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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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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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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Crabbot: A Pole-Climbing Robot Driven by Piezoelectric Stack
IEEE Transactions on Robotics, 2022Problems of large sizes and low displacement resolutions widely exist in most of the pole-climbing robots based on electromagnetic or electrostatic motors, which greatly decrease the reachable workspace and influence their utility for inspection tasks. Here, we present a piezoelectric pole-climbing robot (Crabbot) to overcome these shortcomings, which ...
Ma Xuefeng +3 more
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Modeling for Piezoelectric Stacks in Series and Parallel
2013 Third International Conference on Intelligent System Design and Engineering Applications, 2013Piezoelectric energy harvesting is a new type technology of green energy. To increase energy harvesting efficiency from below frequencies, which exist mostly in ambient, the piezoelectric stack assembled electrically in series and parallel is used as the energy harvester.
Chunhua Sun +4 more
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Review of Scientific Instruments, 2021
The angle between the piezoelectric stack (PES) and the mover would significantly affect the output performances of stick-slip piezoelectric actuators in theory; however, this issue has not been explored. Accordingly, in this paper, to investigate the effects of the angle, a stick-slip piezoelectric actuator with a changeable angle between the PES and ...
Kuifeng Wang +5 more
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The angle between the piezoelectric stack (PES) and the mover would significantly affect the output performances of stick-slip piezoelectric actuators in theory; however, this issue has not been explored. Accordingly, in this paper, to investigate the effects of the angle, a stick-slip piezoelectric actuator with a changeable angle between the PES and ...
Kuifeng Wang +5 more
openaire +2 more sources