Nonlinear design, analysis, and tests of a compact compliant linear guide with internal connection

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dc.contributor.authorKuresangsai, Pongsiri
dc.contributor.authorCole, Matthew O.T.
dc.contributor.authorHao, Guangbo
dc.contributor.funderTaighde Éireann - Research Ireland
dc.date.accessioned2026-07-08T10:50:07Z
dc.date.available2026-07-08T10:50:07Z
dc.date.issued2026-05-18
dc.description.abstractThe standard symmetric double parallel compliant mechanism (SDPCM) is commonly used in high-precision applications as it provides large-range linear motion in the primary degree of freedom (DoF) with linear stiffness. However, the mechanism’s topology causes a significant reduction in lateral bearing stiffness as the DoF displacement increases. This research proposes modified SDPCM designs with vertical footprints and augmented internal link connections that enhance stiffness in the bearing directions, or degree of constraint (DoC), while maintaining linear stiffness in the DoF and preserving the compact form of the structure. The nonlinear spatial beam constraint model (SBCM) is employed for design analysis, allowing high-accuracy predictions of stiffness and parasitic motions in agreement with nonlinear finite element analysis, with all results based on linear material models. Experimental results for the new design confirm the improved stiffness, while also revealing the mechanism’s sensitivity to assembly errors, which leads to lower stiffness in the DoC directions and larger parasitic motions than the theoretical predictions. In addition, the experimental results confirm the benefit of the vertical-footprint design. The mean value of the in-plane and out-of-plane torsional stiffness over the target motion range is increased by 23% and 60%, respectively, compared with the SDPCM. The benefit of the internal link connection is also clearly demonstrated, as it resists the reduction of lateral bearing stiffness over the target motion range. This improvement is clearly observed at the maximum displacement, where an increase of 360% in lateral bearing stiffness is observed compared with the SDPCM. The overall stiffness improvement enhances system stability and reduces parasitic motions, while a simple linear control can be applied owing to the nearly constant stiffness in the DoF direction.en
dc.description.sponsorshipTaighde Éireann—Research Ireland|GOIPD/2024/717
dc.description.versionPublished Version
dc.format.extent13
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid103306
dc.identifier.authororcidKuresangsai, Pongsiri
dc.identifier.authororcidCole, Matthew O.T.
dc.identifier.authororcidHao, Guangbo§0000-0002-5930-5453
dc.identifier.citationKuresangsai, P, Cole, M O T & Hao, G 2026, 'Nonlinear design, analysis, and tests of a compact compliant linear guide with internal connection', Journal of Mechanical Design, vol. 148, no. 10, 103306, pp. 1-13. https://doi.org/10.1115/1.4071519
dc.identifier.doi10.1115/1.4071519
dc.identifier.endpage13
dc.identifier.issn1050-0472
dc.identifier.issued10
dc.identifier.journaltitleJournal of Mechanical Design
dc.identifier.otherORCID: /0000-0002-5930-5453/work/220111623
dc.identifier.startpage1
dc.identifier.urihttps://hdl.handle.net/10468/19021
dc.identifier.volume148
dc.language.isoen
dc.publisherAmerican Society of Mechanical Engineers (ASME)
dc.rights© 2026, ASME. Reuse license: CC-BY 4.0.
dc.rights.accessrightsopen access
dc.rights.licensenameAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.statusPeer reviewed
dc.subjectCompliant mechanisms
dc.subjectKinetostatic modeling
dc.subjectLinear guide mechanism
dc.subjectOut-of-plane stiffness
dc.subjectParasitic motions
dc.subject[EngineeringArchitecture]
dc.titleNonlinear design, analysis, and tests of a compact compliant linear guide with internal connectionen
dc.typeArticle (peer-reviewed)
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