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 1181 for “"Obstacle"”.
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Obstacle Annotation by Demonstration
… field of view that should be interpreted as obstacles to be avoided. This is accomplished by detecting the movement for a given frame in a video. Some hand annotations of video frames are necessary and they are used to create Probability Grids. Using the movement data and the Probability …
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Dislocation -Obstacle Interactions in Aluminum Alloys
This thesis examines two types of dislocation-obstacle interactions: dislocation-particle interactions during creep deformation, and dislocation-loop interactions during deformation at room temperature. Dislocation-particle interaction studies in Al-Zn-Mg-Cu-Zr, Al-4Mg-0.3Sc, and Al-0.3Sc showed …
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Omnidirectional obstacle detection using minimal sensing
An integrated approach to visual obstacle detection for aerial multi-rotor vehicles (drones) is introduced. The approach achieves omnidirectional detection of obstacles via suitable synergy of hardware and software. The drone requires a specific arrangement of two cameras, opposing each other, and …
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Obstacle and Change Detection Using RGB Cameras
Obstacle and change detection using RGB camera is implemented with 48 training videos of obstacle-free paths, considering the surroundings as part of the paths to detect any ob- stacles and changes on the test image paths in this study. This study introduces a dual- approach framework combining …
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Obstacle avoidance robot applying fuzzy control system
The use of energy saving glass has become very popular in the modern day building design. This energy saving property is achieved by applying a very thin tin oxide (SnO2) coating on one side of the glass. This coating can provide good thermal insulation to the buildings by blocking infrared rays …
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Brand awareness of obstacle course racing events
… purchase and purchase intentions for three major obstacle course event companies (Tough Mudder, Spartan Race, and The Warrior Dash). The study also examined the influence of consumer characteristics (demographic and past behavior) on satisfaction and the satisfaction–repurchase relationship among …
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Obstacle Avoidance for Small Unmanned Air Vehicles
… low altitude surveillance flights where unknown obstacles can be encountered. These UAVs can be given the capability to navigate in uncertain environments if obstacles are identified. This research presents an obstacle avoidance system for small UAVs. First, a mission waypoint path is created …
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Visually-guided obstacle avoidence in unstructured environments
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Obstacle problems with elliptic operators in divergence form
Under the guidance of Dr. Ivan Blank, I study the obstacle problem with an elliptic operator in divergence form. First, I give all of the nontrivial details needed to prove a mean value theorem, which was stated by Caffarelli in the Fermi lectures in 1998. In fact, in 1963, Littman, Stampacchia, …
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Obstacle detection for robot navigation using structured light
Obstacle detection is an essential function for autonomous mobile robots. Current autonomous systems are generally heavy, high-powered devices. Additionally, obstacle detection systems often employ active ranging sensors that exhibit poor angular resolution, thereby preventing vehicles from …
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Optical flow for obstacle detection in mobile robots
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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Feature-relative real-time obstacle avoidance and mapping
… Localization and Mapping (SLAM) module, and obstacle avoidance using information from mapped features. The resulting system performs autonomous feature-relative Real-time Obstacle Avoidance and Mapping (ROAM) with laser or sonar range sensors, and results are shown for wide-beam sonar. This …
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High-speed autonomous obstacle avoidance with pushbroom stereo
… only onboard sensing and computation, we perform obstacle detection, planning, and feedback control in realtime. We introduce a novel stereo vision algorithm, pushbroom stereo, capable of detecting obstacles at 120 frames per second without overburdening our lightweight processors. Our use of …
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Manipulator control with obstacle avoidance using local guidance
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
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Cavity flow past an obstacle including gravity effects
The object of this study was to use the relaxation method to find the solution of cavity flow past a two-dimensional roughness element in an open channel with gravity effect included. The method developed is based on an inviscid, irrotational and incompressible flowfield, using a finite-difference …
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Dynamic Obstacle Avoidance on a Self-balancing Robot Platform
… this work specifically focuses upon is dynamic obstacle avoidance by a robotic unit that is guided by a human user. Dynamic obstacles are objects that move in the environment independently from the robot and can potentially raise safety concerns for the robotic platform. In order to detect these …
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Development of a vehicle dynamics controller for obstacle avoidance
… is determination of a feasible path that avoids obstacles and a means of causing the vehicle to follow that trajectory. This research focuses on feasible trajectory generation and development of an automatic obstacle avoidance controller that integrates steering and braking action. A controller …
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Obstacle Avoidance and Path Traversal Using Interactive Machine Learning
… can cause the robot to automatically perform obstacle avoidance. This definition system uses interactive machine learning to ensure that the obstacle avoidance is both easy for a human operator to use and can perform well in different environments. Initial, real world tests show that system is …
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