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Swarm-Based Techniques For Adaptive Navigation Primitives, Nathan Metzger
Swarm-Based Techniques For Adaptive Navigation Primitives, Nathan Metzger
Mechanical Engineering Master's Theses
Adaptive Navigation (AN) has, in the past, been successfully accomplished by using mobile multi-robot systems (MMS) in highly structured formations known as clusters. Such multi-robot adaptive navigation (MAN) allows for real-time reaction to sensor readings and navigation to a goal location not known a priori. This thesis successfully reproduces MAN cluster techniques via swarm control techniques, a less computationally expensive but less formalized control technique for MMS, which achieves robot control through a combination of primitive robot behaviors. While powerful for large numbers of robots, swarm robotics often relies on “emergent” swarm behaviors resulting from robot-level behaviors, rather than top-down …
Generation And Analysis Of Stop-Hole Geometries For Crack-Like Structures In Auxetic Materials, Max De Jesús Barillas Velásquez
Generation And Analysis Of Stop-Hole Geometries For Crack-Like Structures In Auxetic Materials, Max De Jesús Barillas Velásquez
Mechanical Engineering Master's Theses
In this investigation, the main interest was studying low porosity auxetic metamaterials generated out of linearly elastic materials, meaning bodies made out of linearly elastic materials (e.g., metals) that, due to alternating patterns of elongated voids perforated on them, exhibit a negative effective Poisson ratio (property commonly called auxeticity). This kind of metamaterials, often obtained by a pattern of elongated ellipsis, generally face the issue of presenting high stress concentration when loaded. The objective of this study is to solve this problem by adding rounded shapes (stop-holes) at the end of elongated grooves, as a replacement for the previously mentioned …
Development Of Image Analysis Technique For Quantification Of Recrystalization, Bersabe Morales
Development Of Image Analysis Technique For Quantification Of Recrystalization, Bersabe Morales
Mechanical Engineering Master's Theses
Development of metallic components with desired properties for the new generation of applications requires precise design of grain structure. One of the most effective techniques for manipulating grain structure is by controlling the recrystallization process. Although recrystallization has been studied for many years, its proper and fast quantification is still a challenge. This work develops a new image analysis technique for quantification of recrystallization, as an alternative to intensive and expensive electron backscatter diffraction (EBSD) analysis. The image analysis program run on an optical micrograph, detect recrystallized regions and report: fraction recrystallized, average grain size and distribution. To examine the …