Synthesis of Scalable Planar Scissor Linkages with Anti-parallelogram Loops

Gür, Şebnem; Karagöz, Cevahir; Kiper, Gökhan; Korkmaz, Koray

doi:10.1007/978-3-319-98020-1_49

Cited by 4 publications

(5 citation statements)

References 12 publications

(12 reference statements)

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“…[Hoberman et al, 2013] This way, he is able to form angulated units with constant subtended angles. 3) assemblies in various configurations [24][25][26]. These assemblies are special cases of one of the findings of this study and can be found under Section 5 -Linkage 4.…”

Section: Loop Assembly Methodsmentioning

confidence: 82%

Design of Anti-Parallelogram Loop Assemblies

Gür¹,

Korkmaz²,

Kiper³

2019

Journal of the International Association for Shell and Spatial

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Scissor mechanisms are frequently used for deployable structures and many studies have been conducted on the subject. Most of the studies consider scissor units as modules in the design process. An alternative approach is to utilize loops as the modules for design. In this paper, the design alternatives of single degree-of-freedom planar linkages comprising anti-parallelogram loops using the loop assembly method is presented. First, scissor mechanisms are reviewed. Next, the types of four-bar loops and the resulting linkages in the literature are introduced and those which are yet to be explored, anti-parallelogram being one of them, are identified. Then the loop assembly method and the examples in the literature are reviewed. As a method to form as many alternatives as possible, symmetry operations are proposed. Suitable frieze symmetry groups utilized for obtaining the assemblies are explained and the anti-parallelogram loop patterns are derived. Next, the single degree-of-freedom linkages are obtained from the loop assemblies. Finally, a selection of the resulting linkages with novel properties are presented. This study shows that loop assemblies are efficient in systematic type synthesis of scissor linkages, some types of which could not be foreseen by using units as modules.

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Section: Loop Assembly Methodsmentioning

confidence: 82%

Design of Anti-Parallelogram Loop Assemblies

Gür¹,

Korkmaz²,

Kiper³

2019

Journal of the International Association for Shell and Spatial

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“…Another study of the authors is by Gür et al [42] where they made the use of a loop that was not considered previously in scissor structures: the antiparallelogram. Also known as crossed-parallelogram or contra-parallelogram, it is a complex quadrilateral that intersects itself, though the intersection point does not provide a joint.…”

Section: Loop-based Methodsmentioning

confidence: 99%

“…Gür et al [43] also investigated structures approximating free-form curves. The curve is handled as the target form at fully deployed state and loops are scaled in between discrete nodes on the curve.…”

Section: Loop-based Methodsmentioning

confidence: 99%

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A Critical Review on Classification and Terminology of Scissor Structures

Maden¹,

Akgün²,

Kiper³

et al. 2019

Journal of the International Association for Shell and Spatial

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When the existing literature on the research of scissor structures is thoroughly investigated, it is seen that different researchers use different terminologies and classifications especially for the definition of the primary units and the motion type. Some of the studies define the whole geometry based on the geometric properties of the primary scissor units and the unit lines while some other studies define it according to the loops. All these studies use different names for similar elements. This article aims to review the literature on the classification and terminology of scissor structures and represent the state of art on the studies. Tables are represented showing all approaches in the literature. In addition, the article criticizes the missing points of each terminology and definition, and proposes some new terminology. In order to arrive at this aim, different definitions of the primary scissor units and motion types used in key studies in the literature are investigated thoroughly. With several examples, it is demonstrated that naming the scissor units according to the resulting motion type might be misleading and it is better to specify the motion type for the whole structure. A classification for transformation of planar curves is presented.

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“…One of the key issues of the design process for these structures is the dimensional synthesis of the mechanisms with articulated bars, so that the structures have the highest possible degree of deployability and, at the same time, occupy as little space as possible when folded [11], [12], [13]. In this paper, dimensional synthesis and simulation of some deployable mechanisms based on a modified scissor mechanism [ ] will be presented.…”

Section: Introductionmentioning

confidence: 99%

Dimensional synthesis and comparative simulation of two planar deployable mechanisms

Doroftei

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Deployable structures have the ability to change their shape and volume, being used to design mobile structures with various applications in architecture. Planar or spatial mechanisms with articulated bars, folding plates or membranes could be used to realize such structures. In this paper, dimensional synthesis and simulation of two deployable structures based on a modified scissor mechanism will be presented.

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Synthesis of Scalable Planar Scissor Linkages with Anti-parallelogram Loops

Cited by 4 publications

References 12 publications

Design of Anti-Parallelogram Loop Assemblies

Design of Anti-Parallelogram Loop Assemblies

A Critical Review on Classification and Terminology of Scissor Structures

Dimensional synthesis and comparative simulation of two planar deployable mechanisms

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