Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"Spatial Mechanism"”.
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Automatic geometric modeling of spatial mechanism links
… automatic geometric modeling of 3-D models for spatial links or linkages given a minimum amount of information as input. The subroutines utilize the CADCD (CADAM, Inc.) geometry interface software to enter 3-D data directly into the CAD/CAM database. Wire-frame and surface models are produced. …
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Computer-aided RRSS spatial mechanism synthesis and design
… will form part of a system for the design of spatial mechanisms presently being developed at Virginia Polytechnic Institute and State University. The major areas covered by this thesis arc the synthesis and analysis of the RRSS spatial mechanism. The RRSS mechanism is a four-link mechanism …
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Computer aided design of the RCCC spatial mechanism
… for the computer aided design of the RCCC spatial mechanism. The RCCC mechanism has been synthesized for three precision positions and the solutions have been obtained in closed form. Besides analysis and synthesis, various other mechanism considerations like mobility, branching, order …
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Computer aided design and synthesis of the RSCR spatial mechanism
… However, there are many applications where a spatial mechanism could be used in place of a robot, but the mechanism design theory has not been fully developed. This thesis presents the fundamentals of a computer aided design system for the RSCR (revolute-spheric-cylindric-revolute) spatial …
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Synthesis and design of the RSSR spatial mechanism for function generation
… package for the synthesis and design of the RSSR spatial function generating mechanism. In addition to the introductory material this thesis is divided into three sections. The section on background kinematic theory includes synthesis, analysis, link rotatability, transmission quality, and …
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A PHIGS based interactive graphical preprocessor for spatial mechanism analysis and synthesis
… graphical preprocessor for data input to spatial mechanism analysis and synthesis codes. A goal in the development of this preprocessor is to produce a graphical data input program that is both graphics device-independent and not structured for the input of data to any particular mechanism …
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An interactive PHIGS+ model rendering system applied to postprocessing of spatial mechanisms
… development, and use of PriSM (Postprocessing of Spatial Mechanisms), an interactive 3-D graphical postprocessor for spatial mechanism synthesis and design programs. This device-independent system provides visualization, modeling, and animation of spatial mechanisms. New ideas and methods are …
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The Foundation for CADSPAM: Computer Aided Design of SPAtial Mechanisms
… of a computer program for the unified design of spatial mechanisms. The program will be capable of synthesizing any mechanism that can be described using an equivalent chain containing only revolute and prismatic joints. The supporting analysis routine will be general and will be able to analyze …
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Automatic generation of interference-free geometric models of spatial mechanisms
… methods used to obtain geometric models of spatial mechanisms which can be realized in hardware. Each model is created automatically from the kinematic description of a mechanism. The models are tested for interference between joints and links. Models with interfering links or joints are …
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Achieving Complex Motion with Fundamental Components for Lamina Emergent Mechanisms
… and reduce cost is to use ortho-planar compliant mechanisms which can be made from sheets of material, or lamina emergent mechanisms (LEMs). This thesis presents principles which can be used for designing LEMs. Pop-up paper mechanisms use topologies similar to LEMs, so it is advantageous to study …
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Concepts for retractable roof structures.
… through a geometrical study of the retractable mechanism. Applying the theorem it is found that retractable structures of any plan shape can be formed from plate elements only. To prove the concept a 1.3 meter diameter model is designed and built. To increase the structural efficiency of the …
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The design of adjustable spherical mechanisms using plane-to-sphere and sphere-to-plane projections
The spherical mechanism is a particular type of spatial mechanism. Due to the orientation of its joint axes and the curvature of its links, the workspaces of spherical mechanisms (whether line segments, closed loops or area regions) are spherical in curvature. This characteristic of spherical …
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Kinematic synthesis of adjustable spatial four and five-bar mechanisms for finite and multiply separated positions
Although spatial mechanisms are more general in structure than planar mechanisms, their applications are few due to the limited number of practical design tools and the complexity of those available. It is in fact the task of the future to develop effective, but practical design tools for spatial …