Spiral Pulley Negative Stiffness Mechanism for Morphing Aircraft Actuation

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

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 a pre-tension spring to covert decreasing spring force into increasing balanced
torque. The kinematics of the spiral pulley are firstly developed
and its geometry is then optimised by employing an energy conversion efficiency function. The performance of the optimised spiral pulley is then evaluated through the net torque, the total required energy and energy conversion efficiency. An experiment demonstrates the negative stiffness property of the mechanism and compares its characteristics with the analytical result.
Exploiting the negative stiffness mechanism has a significant interest in not only the field of morphing aircraft but many other power reduction applications.an increasing output torque. The kinematics of the spiral pulley are firstly developed and its geometry is then optimised by employing an energy conversion efficiency function. The performance of the optimised spiral pulley
is then evaluated through the net torque, the total required energy
and energy conversion efficiency. An experiment demonstrates the negative stiffness property of the mechanism and compares its characteristics with the analytical result. Exploiting the negative stiffness mechanism has a significant interest in not only the field of morphing aircraft but also many other energy and power reduction applications.
Original languageEnglish
Title of host publicationASME 2018 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference
PublisherAmerican Society of Mechanical Engineers(ASME)
Number of pages10
Volume5B
ISBN (Print)9780791851814
DOIs
Publication statusPublished - 2 Nov 2018
Externally publishedYes
EventASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference - Quebec City Convention Center, Quebec, Canada
Duration: 26 Aug 201829 Aug 2018
https://archive.asme.org/events/idetccie2018

Conference

ConferenceASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
Abbreviated titleIDETC/CIE
CountryCanada
CityQuebec
Period26/08/1829/08/18
Internet address

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Cite this

Zhang, J., Shaw, A., Amoozgar, M., Friswell, M. I., & Woods, B. K. S. (2018). Spiral Pulley Negative Stiffness Mechanism for Morphing Aircraft Actuation. In ASME 2018 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference (Vol. 5B). American Society of Mechanical Engineers(ASME). https://doi.org/10.1115/DETC2018-85640