Most examples of structure controlled Tunable Stiffness Mechanisms (TSM) systems have two predefined settings of stiffness, e.g. bi-stiffness behavior, or they have a low range in tunable stiffness. In this research, this problem of control is overcome though optimization of a novel concentric circular tapered spring beam design with the novel design concept of changing the mode of deformation from bending to axial or shear. A Monte Carlo (MC) function is used with an analytical model — the unit load method of virtual work, to determine the optimum shape of two concentric tapered beams where the minimum stiffness is set, and the objective is to achieve linear and/or large stiffness change control. Three optimum designs were 3D printed, tested, and the stiffness vs. loading angle of control was validated with excellent correlation. The optimum design was obtained by changing the dominant loading modes.
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ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 6–9, 2017
Cleveland, Ohio, USA
Conference Sponsors:
- Design Engineering Division
- Computers and Information in Engineering Division
ISBN:
978-0-7918-5817-2
PROCEEDINGS PAPER
Optimization for Large or Linear Tunable Stiffness Control With a Concentric Circular Tapered Beam Design
Shane Johnson,
Shane Johnson
UM-SJTU Joint Institute, Shanghai, China
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Anton Van Beek,
Anton Van Beek
UM-SJTU Joint Institute, Shanghai, China
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Zeeshan Qaiser,
Zeeshan Qaiser
UM-SJTU Joint Institute, Shanghai, China
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Liping Kang
Liping Kang
UM-SJTU Joint Institute, Shanghai, China
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Shane Johnson
UM-SJTU Joint Institute, Shanghai, China
Anton Van Beek
UM-SJTU Joint Institute, Shanghai, China
Zeeshan Qaiser
UM-SJTU Joint Institute, Shanghai, China
Liping Kang
UM-SJTU Joint Institute, Shanghai, China
Paper No:
DETC2017-67346, V05AT08A004; 9 pages
Published Online:
November 3, 2017
Citation
Johnson, S, Van Beek, A, Qaiser, Z, & Kang, L. "Optimization for Large or Linear Tunable Stiffness Control With a Concentric Circular Tapered Beam Design." Proceedings of the ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 5A: 41st Mechanisms and Robotics Conference. Cleveland, Ohio, USA. August 6–9, 2017. V05AT08A004. ASME. https://doi.org/10.1115/DETC2017-67346
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