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System Level Optimisation of Passive Energy Balancing

Alexander Shaw Orcid Logo, Jiaying Zhang, Chen Wang, Benjamin Woods, Michael Friswell

AIAA SCITECH 2022 Forum

Swansea University Authors: Alexander Shaw Orcid Logo, Michael Friswell

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DOI (Published version): 10.2514/6.2022-0172

Abstract

A common issue with morphing structures is that the actuators must work against significant structural and aerodynamic stiffness. The concept of passive energy balancing (PEB) aims to ameliorate this, and thereby reduces system mass, by connecting negative stiffness elements to the actuated degrees...

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Published in: AIAA SCITECH 2022 Forum
ISBN: 978-1-62410-631-6
Published: Reston, Virginia American Institute of Aeronautics and Astronautics 2022
Online Access: http://dx.doi.org/10.2514/6.2022-0172
URI: https://cronfa.swan.ac.uk/Record/cronfa59194
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spelling 2022-07-21T10:45:36.1905754 v2 59194 2022-01-17 System Level Optimisation of Passive Energy Balancing 10cb5f545bc146fba9a542a1d85f2dea 0000-0002-7521-827X Alexander Shaw Alexander Shaw true false 5894777b8f9c6e64bde3568d68078d40 Michael Friswell Michael Friswell true false 2022-01-17 AERO A common issue with morphing structures is that the actuators must work against significant structural and aerodynamic stiffness. The concept of passive energy balancing (PEB) aims to ameliorate this, and thereby reduces system mass, by connecting negative stiffness elements to the actuated degrees of freedom. However, these devices can be complex to design and will also add their own mass to the system. It is therefore difficult to determine the potential for system-level mass saving without significant detailed design effort. This work treats a PEB device as essentially a local energy storage mechanism. This framework leads to an approach to optimization that will deliver a lightweight PEB mechanism in addition to reducing actuator requirements. It also allows a high-level method to obtain an approximate evaluation of system-level benefits with only basic information about the application being considered, by comparing general properties of the actuators used to the energy storage properties of the underlying materials used in the PEB device. The work concludes with a case study that shows how the PEB can potentially reduce system mass both through reduced energy consumption requirements and actuator mass savings, and can work particularly well for actuators with nonideal stroke/force profiles. Journal Article AIAA SCITECH 2022 Forum American Institute of Aeronautics and Astronautics Reston, Virginia 978-1-62410-631-6 3 1 2022 2022-01-03 10.2514/6.2022-0172 http://dx.doi.org/10.2514/6.2022-0172 COLLEGE NANME Aerospace Engineering COLLEGE CODE AERO Swansea University 2022-07-21T10:45:36.1905754 2022-01-17T10:43:17.1001215 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Alexander Shaw 0000-0002-7521-827X 1 Jiaying Zhang 2 Chen Wang 3 Benjamin Woods 4 Michael Friswell 5
title System Level Optimisation of Passive Energy Balancing
spellingShingle System Level Optimisation of Passive Energy Balancing
Alexander Shaw
Michael Friswell
title_short System Level Optimisation of Passive Energy Balancing
title_full System Level Optimisation of Passive Energy Balancing
title_fullStr System Level Optimisation of Passive Energy Balancing
title_full_unstemmed System Level Optimisation of Passive Energy Balancing
title_sort System Level Optimisation of Passive Energy Balancing
author_id_str_mv 10cb5f545bc146fba9a542a1d85f2dea
5894777b8f9c6e64bde3568d68078d40
author_id_fullname_str_mv 10cb5f545bc146fba9a542a1d85f2dea_***_Alexander Shaw
5894777b8f9c6e64bde3568d68078d40_***_Michael Friswell
author Alexander Shaw
Michael Friswell
author2 Alexander Shaw
Jiaying Zhang
Chen Wang
Benjamin Woods
Michael Friswell
format Journal article
container_title AIAA SCITECH 2022 Forum
publishDate 2022
institution Swansea University
isbn 978-1-62410-631-6
doi_str_mv 10.2514/6.2022-0172
publisher American Institute of Aeronautics and Astronautics
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
url http://dx.doi.org/10.2514/6.2022-0172
document_store_str 0
active_str 0
description A common issue with morphing structures is that the actuators must work against significant structural and aerodynamic stiffness. The concept of passive energy balancing (PEB) aims to ameliorate this, and thereby reduces system mass, by connecting negative stiffness elements to the actuated degrees of freedom. However, these devices can be complex to design and will also add their own mass to the system. It is therefore difficult to determine the potential for system-level mass saving without significant detailed design effort. This work treats a PEB device as essentially a local energy storage mechanism. This framework leads to an approach to optimization that will deliver a lightweight PEB mechanism in addition to reducing actuator requirements. It also allows a high-level method to obtain an approximate evaluation of system-level benefits with only basic information about the application being considered, by comparing general properties of the actuators used to the energy storage properties of the underlying materials used in the PEB device. The work concludes with a case study that shows how the PEB can potentially reduce system mass both through reduced energy consumption requirements and actuator mass savings, and can work particularly well for actuators with nonideal stroke/force profiles.
published_date 2022-01-03T04:16:18Z
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score 11.037603

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