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 20 of 86 for “"multi-axis"”.
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A multi-axis approach to complexity management
A high degree of complexity exists in the product, processes, organization and supply chain at HIGHVOLT Prüftechnik GmbH, subsidiary of Maschinenfabrik Reinhausen. The current state complexity results from unique market dynamics, the highly technical nature of the solutions offered and customer …
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Cutter-workpiece engagement identification in multi-axis milling
… this methodology, cutter surfaces performing 5-axis tool motions are decomposed into a set of characteristic circles. For obtaining these circles a concept of two-parameter-family of spheres is introduced. Considering relationships among the circles the swept envelopes are defined analytically. …
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Automatic tool path generation for multi-axis machining
… a novel approach to CAD/CAM integration for multi-axis machining. Instead of redefining the workpiece in terms of machining features, we generate tool paths directly by analyzing the accessibility of the surface of the part. This eliminates the problem of feature extraction. We envision this …
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Volcanic Gas Studies by Multi Axis Differential Absorption Spectroscopy
The chemistry of volcanic plumes can give insights into volcanic processes, which could help with improving the forecast of volcanic eruptions and is also of atmospheric relevance as the volcanic source of aerosols and trace gases can have a significant climatic impact. Although both are very …
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Multi-axis analog adaptive feedforward cancellation of cryocooler vibration
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Multi-axis isolation from a lightly damped vibrating structure
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Integrated process planning for a multi-axis hybrid manufacturing system
"In a multi-axis metal hybrid layered manufacturing system, in which a laser material deposition and material removal system with more than 3-axis mobility are configured, a process planning to automatic define motion path for the integrated system is critical. The purpose of this research is to …
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Multi-Axis Material Extrusion Additive Manufacturing of Continuous Carbon Fiber Composites
… fiber-reinforced materials in combination with multi-axis deposition strategies. In material extrusion, embedded fibers will align themselves along the deposition path, providing structural, thermal, and chemical improvements. Multi-axis toolpathing can enable the deposition of this fiber-filled …
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Topology and Toolpath Optimization via Layer-Less Multi-Axis Material Extrusion
… customizing the toolpath. Recent developments in multi-axis deposition have demonstrated the ability to place material outside of the XY-plane, enabling depositions to align to any 3D (i.e., non-planar) vector. Although mechanical property improvements have been demonstrated, toolpath planning …
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Design, development, and dynamic characterization of multi-axis force sensing composite footpad
Accurate ground reaction force measurements are important for the development, implementation, and control of high speed legged locomotion robots. From previous research studies, a composite force sensing footpad has been developed, tested, and characterized statically at the MIT Biomimetics Lab. …
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Fast multi-axis tracking of magnetically-resonant passive tags : methods and applications
… capable of real-time continuous interaction with multiple tagged objects. Although the ringdown reader worked well for smaller numbers of tags, the swept-frequency tag reader proved more efficient for work with twenty to thirty tags, and so we did further work to extend and apply it. Graphical and …
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Design of a multi-axis force transducer with applications in track and field
… thesis is the design and implementation of a multi-axis force transducer to be integrated into a set of track and field starting blocks. The feedback from this transducer can be used by athletes and coaches to analyze race starts, with the intention of maximizing the runner's speed and power …
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Airborne Multi AXis DOAS instrument and measurements of two-dimensional tropospheric trace gas distributions
The Airborne Multi AXis DOAS instrument was developed and successfully operated during four measurement campaigns. Depending on the purpose the instrument was installed on two different aeroplanes flying either close to the tropopause or in the mixing layer. In a detailed sensitivity study the …
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Modeling, Parameter Estimation and Compensation of Quasistatic Errors in Multi-Axis CNC Machining Centers
Dimensional accuracy is often the single most critical criterion that can be used to evaluate the quality of machined parts. Increasing demand for highly accurate and inexpensive mechanical parts has created a critical need for developing economical and efficient processes for their production.
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Multi-axis compliant mechanism-based nanopositioner for multi-mode mechanical testing of carbon nanotubes
This thesis documents the design of a multi-axis nanopositioner that addresses a need for carbon nanotube (CNT) instrumentation that is capable of multiple modes of mechanical testing. This nanopositioner is a solution to the need to quantify the mechanical properties of CNTs with the appropriate …
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Predictive Simulations of the Impedance-Matched Multi-Axis Test Method Using Data-Driven Modeling
… The recently developed Impedance-Matched Multi-Axis Test (IMMAT) has been shown in the literature to improve upon traditional environmental testing practices through the use of multi-input multi-output testing and impedance matching. Additionally, with the use of numerical models, …
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Characterization of Laminated Magnetoelectric Vector Magnetometers to Assess Feasibility for Multi-Axis Gradiometer Configurations
… their total field detection, the effects of multiple sensors in close proximity and the signal processing needed for target localization. The goal for this project is to closely examine the single axis ME sensor response in different orientations with a moving magnetic dipole to assess the …
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Design and analysis of wearable conductive fiber sensors for continuous multi-axis joint angle measurements
… and directly related to specific single or multi-axis joint angles through the use of a nonlinear predictor after an initial, one-time calibration. These wearable sensors are comfortable, and acceptable for long-term wear in everyday settings. Because these sensors are intended for multiple …
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