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Bidirectional Spiral Pulley Negative Stiffness Mechanism for Passive Energy Balancing

Jiaying Zhang Orcid Logo, Alexander Shaw Orcid Logo, Mohammadreza Amoozgar, Michael Friswell, Benjamin K. S. Woods

Journal of Mechanisms and Robotics, Volume: 11, Issue: 5, Start page: 054502

Swansea University Authors: Jiaying Zhang Orcid Logo, Alexander Shaw Orcid Logo, Mohammadreza Amoozgar, Michael Friswell

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DOI (Published version): 10.1115/1.4043818

Abstract

The energy balancing concept seeks to reduce actuation requirements for a morphing structure by strategically locating negative stiffness devices to tailor the required deployment forces and moments. One such device is the spiral pulley negative stiffness mechanism. This uses a cable connected with...

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Published in: Journal of Mechanisms and Robotics
ISSN: 1942-4302 1942-4310
Published: ASME International 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa51312
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first_indexed 2019-08-09T16:32:00Z
last_indexed 2020-11-20T04:05:58Z
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spelling 2020-11-19T15:55:54.7316208 v2 51312 2019-08-05 Bidirectional Spiral Pulley Negative Stiffness Mechanism for Passive Energy Balancing 12b61893c794b14f11cf0a84cb947d0e 0000-0001-7308-5090 Jiaying Zhang Jiaying Zhang true false 10cb5f545bc146fba9a542a1d85f2dea 0000-0002-7521-827X Alexander Shaw Alexander Shaw true false 56910e9937b39a1a96d6252845c385d3 Mohammadreza Amoozgar Mohammadreza Amoozgar true false 5894777b8f9c6e64bde3568d68078d40 Michael Friswell Michael Friswell true false 2019-08-05 EEN The energy balancing concept seeks to reduce actuation requirements for a morphing structure by strategically locating negative stiffness devices to tailor the required deployment forces and moments. One such device is the spiral pulley negative stiffness mechanism. This uses a cable connected with a pre-tension spring to convert the decreasing spring force into the increasing balanced torque. The kinematics of the spiral pulley is first developed for bidirectional actuation, and its geometry is then optimized by employing an energy conversion efficiency function. The performance of the optimized bidirectional spiral pulley is then evaluated through the net torque, the total required energy, and energy conversion efficiency. Then, an additional test rig tests the bidirectional negative stiffness property and compares the characteristics with the corresponding analytical result. Exploiting the negative stiffness mechanism is of significant interest not only in the field of morphing aircraft but also in many other energy and power reduction applications. Journal Article Journal of Mechanisms and Robotics 11 5 054502 ASME International 1942-4302 1942-4310 Pulleys, Stiffness, Torque, Rotation, Springs, Cables, Kinematics 1 10 2019 2019-10-01 10.1115/1.4043818 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2020-11-19T15:55:54.7316208 2019-08-05T09:59:42.4514422 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Jiaying Zhang 0000-0001-7308-5090 1 Alexander Shaw 0000-0002-7521-827X 2 Mohammadreza Amoozgar 3 Michael Friswell 4 Benjamin K. S. Woods 5
title Bidirectional Spiral Pulley Negative Stiffness Mechanism for Passive Energy Balancing
spellingShingle Bidirectional Spiral Pulley Negative Stiffness Mechanism for Passive Energy Balancing
Jiaying Zhang
Alexander Shaw
Mohammadreza Amoozgar
Michael Friswell
title_short Bidirectional Spiral Pulley Negative Stiffness Mechanism for Passive Energy Balancing
title_full Bidirectional Spiral Pulley Negative Stiffness Mechanism for Passive Energy Balancing
title_fullStr Bidirectional Spiral Pulley Negative Stiffness Mechanism for Passive Energy Balancing
title_full_unstemmed Bidirectional Spiral Pulley Negative Stiffness Mechanism for Passive Energy Balancing
title_sort Bidirectional Spiral Pulley Negative Stiffness Mechanism for Passive Energy Balancing
author_id_str_mv 12b61893c794b14f11cf0a84cb947d0e
10cb5f545bc146fba9a542a1d85f2dea
56910e9937b39a1a96d6252845c385d3
5894777b8f9c6e64bde3568d68078d40
author_id_fullname_str_mv 12b61893c794b14f11cf0a84cb947d0e_***_Jiaying Zhang
10cb5f545bc146fba9a542a1d85f2dea_***_Alexander Shaw
56910e9937b39a1a96d6252845c385d3_***_Mohammadreza Amoozgar
5894777b8f9c6e64bde3568d68078d40_***_Michael Friswell
author Jiaying Zhang
Alexander Shaw
Mohammadreza Amoozgar
Michael Friswell
author2 Jiaying Zhang
Alexander Shaw
Mohammadreza Amoozgar
Michael Friswell
Benjamin K. S. Woods
format Journal article
container_title Journal of Mechanisms and Robotics
container_volume 11
container_issue 5
container_start_page 054502
publishDate 2019
institution Swansea University
issn 1942-4302
1942-4310
doi_str_mv 10.1115/1.4043818
publisher ASME International
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 0
active_str 0
description The energy balancing concept seeks to reduce actuation requirements for a morphing structure by strategically locating negative stiffness devices to tailor the required deployment forces and moments. One such device is the spiral pulley negative stiffness mechanism. This uses a cable connected with a pre-tension spring to convert the decreasing spring force into the increasing balanced torque. The kinematics of the spiral pulley is first developed for bidirectional actuation, and its geometry is then optimized by employing an energy conversion efficiency function. The performance of the optimized bidirectional spiral pulley is then evaluated through the net torque, the total required energy, and energy conversion efficiency. Then, an additional test rig tests the bidirectional negative stiffness property and compares the characteristics with the corresponding analytical result. Exploiting the negative stiffness mechanism is of significant interest not only in the field of morphing aircraft but also in many other energy and power reduction applications.
published_date 2019-10-01T04:03:09Z
_version_ 1763753265604853760
score 11.016994

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