A PZT Array Actuator Using Buckling Strain Amplification and Preload Mechanisms
Displacement amplification mechanisms have been a topic of research for piezoelectric actuators for decades to overcome their significantly small strain, but still utilize their high power density, force, and efficiency This paper further analyzes a nonlinear buckling mechanism to improve its effici...
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| Format: | Article |
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ASME International
2018
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| Online Access: | http://hdl.handle.net/1721.1/118799 https://orcid.org/0000-0001-5393-7559 https://orcid.org/0000-0003-3155-6223 |
| _version_ | 1826210854796787712 |
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| author | Torres, James Neal, Devin M Asada, Haruhiko |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Torres, James Neal, Devin M Asada, Haruhiko |
| author_sort | Torres, James |
| collection | MIT |
| description | Displacement amplification mechanisms have been a topic of research for piezoelectric actuators for decades to overcome their significantly small strain, but still utilize their high power density, force, and efficiency This paper further analyzes a nonlinear buckling mechanism to improve its efficiency, defined as the ratio of mechanical work output of the buckling actuator to the mechanical work output of the PZT actuator, as well as, employing two methods, preload and loading conditions, that improve its work output per cycle. This is accomplished by running a numerical analysis of the geometry of the flexure joints in the buckling mechanism which found a maximum mechanical efficiency of 48%. The preload is applied using shape memory alloy wire to exploit the low stiffness of the super elastic regime; which in turn allows a larger work output due to a loading condition supplied by a novel gear design. Finally a prototype was fabricated to provide a baseline of comparison against these concepts. Topics: Actuators, Buckling, Mechanisms |
| first_indexed | 2024-09-23T14:56:29Z |
| format | Article |
| id | mit-1721.1/118799 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T14:56:29Z |
| publishDate | 2018 |
| publisher | ASME International |
| record_format | dspace |
| spelling | mit-1721.1/1187992022-09-29T11:35:12Z A PZT Array Actuator Using Buckling Strain Amplification and Preload Mechanisms Torres, James Neal, Devin M Asada, Haruhiko Massachusetts Institute of Technology. Department of Mechanical Engineering Torres, James Neal, Devin M Asada, Haruhiko Displacement amplification mechanisms have been a topic of research for piezoelectric actuators for decades to overcome their significantly small strain, but still utilize their high power density, force, and efficiency This paper further analyzes a nonlinear buckling mechanism to improve its efficiency, defined as the ratio of mechanical work output of the buckling actuator to the mechanical work output of the PZT actuator, as well as, employing two methods, preload and loading conditions, that improve its work output per cycle. This is accomplished by running a numerical analysis of the geometry of the flexure joints in the buckling mechanism which found a maximum mechanical efficiency of 48%. The preload is applied using shape memory alloy wire to exploit the low stiffness of the super elastic regime; which in turn allows a larger work output due to a loading condition supplied by a novel gear design. Finally a prototype was fabricated to provide a baseline of comparison against these concepts. Topics: Actuators, Buckling, Mechanisms 2018-10-30T14:40:38Z 2018-10-30T14:40:38Z 2011-10 2018-10-23T16:07:50Z Article http://purl.org/eprint/type/ConferencePaper 978-0-7918-5476-1 http://hdl.handle.net/1721.1/118799 Torres, James, et al. “A PZT Array Actuator Using Buckling Strain Amplification and Preload Mechanisms.” ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control, Volume 2, 31 October - 2 November, 2011, Arlington, Virginia, ASME, 2011, pp. 25–32. © 2011 ASME https://orcid.org/0000-0001-5393-7559 https://orcid.org/0000-0003-3155-6223 http://dx.doi.org/10.1115/DSCC2011-6070 ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control, Volume 2 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf ASME International ASME |
| spellingShingle | Torres, James Neal, Devin M Asada, Haruhiko A PZT Array Actuator Using Buckling Strain Amplification and Preload Mechanisms |
| title | A PZT Array Actuator Using Buckling Strain Amplification and Preload Mechanisms |
| title_full | A PZT Array Actuator Using Buckling Strain Amplification and Preload Mechanisms |
| title_fullStr | A PZT Array Actuator Using Buckling Strain Amplification and Preload Mechanisms |
| title_full_unstemmed | A PZT Array Actuator Using Buckling Strain Amplification and Preload Mechanisms |
| title_short | A PZT Array Actuator Using Buckling Strain Amplification and Preload Mechanisms |
| title_sort | pzt array actuator using buckling strain amplification and preload mechanisms |
| url | http://hdl.handle.net/1721.1/118799 https://orcid.org/0000-0001-5393-7559 https://orcid.org/0000-0003-3155-6223 |
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