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 14 of 14 for “"Bezier curves"”.
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High-order adaptive methods for computing invariant manifolds of maps
… techniques from geometric modeling. He uses Bezier curves/triangles, fundamental objects in curve/surface design, to create adaptive methods. The methods are based on tolerance conditions derived from properties of Bezier curves/triangles. The author develops and tests the methods for an …
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Localization and tracking of high-speed trains using compressed sensing based 5G localization algorithms
… with the map points joined using cubic Bezier curves. The algorithm achieves sub-meter accuracy on the straight track scenario using just one Remote-Radio-Head. For the map trajectory generated using cubic Bezier curves, an accuracy of 1.05~m is achieved with a 99\% availability using …
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A Geometry-Based Motion Planner for Direct Machining and Control
… planner is developed with the intent to process Bezier curves. The motion planning module includes a deterministic predictor-corrector-type curve interpolator, a dynamics limiting module, and a two-pass jerk-limited speed profiling algorithm. The methods are verified by machining an automotive …
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Design and testing of a UAV-based, through-rubble vital sign detection RADAR using metaheuristic topology optimization
… a new antenna parametrization based on Bezier curves is developed and evaluated against the established pixel-based parametrization.
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Contour Encoded Compression and Transmission
… contain a wide variety of shapes, fitting Bezier curves to connected component contours can provide better compression than current glyph library or other codebook compression methods. In addition to better compression, the CECAT system divides the image into layers and tiles that can be …
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A CFD framework for aeroelastic gust load calculations
… for this purpose and 3rd order accurate Bezier curves used to recover a smooth deformed wing. The various sub-components of the aeroelastic model were rigorously validated. Following this, the developed framework was applied to the CRM under gust load conditions.
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Time-dependent adjoint-based optimization of photonic crystals and metamaterials using a stabilized finite element method
… design optimization, to ensure smooth surfaces, Bezier curves are employed to parametrically represent the shape. To reflect the design changes on the mesh, linear elasticity is used to adapt interior mesh points to boundary modifications. The cost function used in this design attempts to shift …
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Autonomous aggressive driving: theory & experiments
… level. New path planning algorithms using Bezier curves are proposed to generate everywhere 𝐶2 continuous curvature-constrained paths for highway real-time lane-switching. We demonstrate expert overtaking maneuver by implementing the proposed decision making, path planning and control …
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Computationally-efficient path planning algorithms in obstacle-rich environments based on visibility graph method
… Proportional-Derivative (PD) controller and Bezier curves have been implemented to ensure that the resulting paths are feasible. As a result of the proposed methods, computation time of conventional VG has been improved by 97 %. The implementation of PD controller may contribute to path …
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Intelligent support for knitwear design
… construction. Garment shapes are modelled using Bezier curves generated using design heuristics drawn from industrial practice, to create curves that look right to a designer and can be easily edited. The development of the garment shape models presented in this thesis involved the solution of …
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Robust Autonomous Navigation of the Mobile Robot `ROSWITHA` by Sophisticated Sensing and Bio-Inspired Algorithms
… (ACO) and Dijkstra algorithm, enhanced with Bezier curves for smoother trajectories. It incorporates deep learning-based semantic segmentation for precise obstacle detection and classification, enabling differentiation between static and dynamic objects. The developed system was rigorously …
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Shape design using intrinsic geometry
… design of two-dimensional and three-dimensional curves as well as three-dimensional surfaces. Using concepts of intrinsic geometry of curves, the shape of a curve can be defined in terms of intrinsic parameters such as the curvature and torsion as a function of the arc length. The method of shape …
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Vision-based Autonomous Navigation using Moon and Earth images
This document explores the possibility of a novel approach to trajectory determination based on optical observation of nearby celestial bodies, and describes its development, implementation and testing. The initial idea was spurred by the need to give the Orion capsule, the next-generation manned …
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Development of an unstructured Cartesian flow solver
An anisotropic unstructured cartesian grid generator and a flow solver were developed for the compressible viscous flow. The grid generator assumes a body configuration given as a set of data points and generates automatically a computational cartesian grid with geometry adaptation. The cartesian …