Results 201 to 210 of about 7,213 (259)
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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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Actuation of a discontinuous structure with piezoelectric actuators
Journal of Sound and Vibration, 2008Abstract An alternate approach to exciting a one-dimensional structure with discontinuities using a piezoelectric actuator is presented and examined. Instead of being bonded to the uniform side of a beam, the piezoelectric actuator is attached such that it spans two adjacent rib discontinuities.
Jingdou Wang +3 more
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Equivalent piezoelectric actuator circuits and comparison
2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, 2014Equivalent piezoelectric actuator circuit is necessary for certain applications. Previous models have limits and are not accurate on modelling the real part of piezo impedance at low frequency range. A simple inverse proportional to frequency model is proposed and experimentally validated.
Xinchang Liu, Yoan Civet, Yves Perriard
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Piezoelectric Actuators Characterization
2012 International Conference on Industrial Control and Electronics Engineering, 2012This paper describes a system to drive piezoelectric actuators over more than one decade of voltages and one octave of frequencies, in order to perform high-speed complex impedance characterization at a user chosen voltage excitation level. This characterization provides information about electrical and mechanical characteristics of the device under ...
Meyer, Hind +6 more
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Piezoelectric actuators in micropositioning
Engineering Science & Education Journal, 2001Micromachines 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
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On the Responsibility of Piezoelectric Actuator
Japanese Journal of Applied Physics, 1987A kind of multilayer piezoelectric actuators were manufactured to be able to respond within 10∼100 µsec for pulse field, and examined the pulse responsibility. The response time might be rather strongly dependent on the sample conditions than both of driving voltage and generated strain.
Hiromitsu Fujii, Yasushi Ohnishi
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Piezoelectric microflextensional actuator
SPIE Proceedings, 2004This paper presents a novel micro flextensional actuator design consisting of bulk PZT bonded to a silicon microbeam. The fabrication process includes boron doping, EDP etching, dicing, and bonding to produce actuators with large displacements (8.7 μm) and gain factors (32) at 100V.
Jongpil Cheong +2 more
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A study on the piezoelectric actuation performance of prestressed piezoelectric unimorph actuators
Journal of Intelligent Material Systems and Structures, 2014The actuation performances of the prestressed piezoelectric unimorph actuators piezoelectric unimorph with mechanically prestressed substrate and thin layer unimorph driver are evaluated in terms of actuation displacement and force. During the performance tests, these prestressed piezoelectric unimorph actuators showed highly nonlinear behavior, in ...
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A stick-slip piezoelectric actuator with high assembly interchangeability
International Journal of Mechanical Sciences, 2022Zhi Xu, Hu Huang, Jingshi Dong
exaly
Synthesis with Piezoelectric Actuation
2003Synthesis methods, such as topology optimization method, have been widely applied to design mechanical structures. Therefore, it is natural that they can also be applied to design smart materials and MEMS structures whose current development has been based on the use of simple analytical models, test of prototypes, and analysis using the finite element
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