Journal article 742 views 144 downloads
Passive energy balancing design for a linear actuated morphing wingtip structure
,
Chen Wang,
Alexander Shaw ,
Mohammadreza Amoozgar,
Michael Friswell
Aerospace Science and Technology, Volume: 107, Start page: 106279
Swansea University Authors:
Jiaying Zhang , Alexander Shaw , Michael Friswell
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©2020 All rights reserved. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND)
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DOI (Published version): 10.1016/j.ast.2020.106279
Abstract
A passive energy balancing concept for linear actuation is investigated in the current work by adopting a negative stiffness mechanism. The proposed negative stiffness mechanism uses a pre-tensioned spring to produce a passive torque and therefore to transfer the passive torque through a crankshaft...
| Published in: | Aerospace Science and Technology |
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| ISSN: | 1270-9638 |
| Published: |
Elsevier BV
2020
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa55484 |
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| Abstract: |
A passive energy balancing concept for linear actuation is investigated in the current work by adopting a negative stiffness mechanism. The proposed negative stiffness mechanism uses a pre-tensioned spring to produce a passive torque and therefore to transfer the passive torque through a crankshaft for linear motion.The proposed passive energy balancing design is supposed to be applied in a morphing wingtip, of which the shape change comes from the elastic deformation of the morphing structure. A significant amount of linear actuation force can be required to deform the structure, and therefore it is important to reduce the required force and the consumed energy by adopting the passive energy balancing design.The kinematics of the negative stiffness mechanism is developed to satisfy the required linear motion and its geometry is then optimised to reduce the energy requirements. The performance of the optimised negative stiffness mechanism is evaluated through the net force and the total required energy, which shows the potential of the design in the morphing wingtip application. |
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| Keywords: |
Negative stiffness mechanism, Kinematics tailoring, Energy balancing, Actuator efficiency, Morphing wingtip, Morphing aircraft |
| College: |
Faculty of Science and Engineering |
| Start Page: |
106279 |