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 11 of 11 for “"Mechanism synthesis"”.
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Computer-aided RRSS spatial mechanism synthesis and design
… 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 composed of …
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Optimization-based mechanism synthesis using multi-objective parallel asynchronous particle swarm optimization
… are investigated and employed for the synthesis of Grashof mechanisms. By using a formal multi-objective handling scheme based on Pareto dominance criteria, the need to pre-weight competing systemic objective functions is removed and the optimal solution for a design problem can be …
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A PHIGS based graphics interface for MECSYN
… graphics interface for MECSYN, a planar mechanism synthesis program. The purpose of this work is to produce a dynamic graphics interface, independent of a graphics device and providing a high level of user interaction. To achieve this, the proposed three-dimensional graphics standard …
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Computer aided design and synthesis of the RSCR spatial mechanism
… 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 mechanism. …
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An interactive PHIGS+ model rendering system applied to postprocessing of spatial mechanisms
… 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 described to …
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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 …
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Kinematic Synthesis of Planar, Shape-Changing Rigid Body Mechanisms for Design Profiles with Significant Differences in Arc Length
… of ergonomic needs. Rigid body shape-change mechanisms offer many advantages including the high capacity to endure substantial loads while achieving large displacements. Their design techniques are also well-established. The goal of this research project is to develop the synthesis theory to …
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Performance improvement for robotic mechanisms by: synthesis design, dynamic balancing and adaptive control techniques
… Improving the performance of robotic mechanisms is a main research area. In this thesis, performance improvement is achieved through the approaches of robotic mechanism synthesis design, dynamic balance, and adaptive control. A novel three degrees of freedom hybrid manipulator is …
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Concept synthesis and design optimization of meso-scale, multi-degree-of-freedom precision flexure motion systems with integrated strain-based sensors
… depends upon the performance of the flexure mechanism (e.g. bearings, actuators, and structural elements) and a metrology system (e.g. sensors). In meso-scale MDOF nanopositioners the sensing system must be integrated into the structure of the nanopositioner. The only viable candidate for …
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Kinematic synthesis of planar four bar and geared five bar mechanisms with structural constraints
… generation, the objective is to calculate the mechanism parameters required to achieve or approximate a set of prescribed rigid-body positions. This doctoral dissertation study is aimed to integrate the classical kinematic analysis of a planar four-bar and geared five-bar motion generation with …
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Hydrocarbon Functionalization via a New Free Radical-Based Condensation Reaction
… were performed in order to elucidate the mechanism of the reaction. Overall, the results are consistent with a free radical chain process with bromine atom as the chain carrier. Substitution effects on the reactivity of the allyl bromides (CH2=C(Z)CH2Br) and their influence on the overall …