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 12 of 12 for “"hazard avoidance"”.
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Hazard avoidance alerting with Markov decision processes
(cont.) (incident rate and unnecessary alert rate), the MDP-based logic can meet or exceed that of alternate logics.
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Hazard avoidance for high-speed rough-terrain unmanned ground vehicles
… situations can occur that require rapid hazard avoidance maneuvers. At high speeds, there is limited time to perform navigation and hazard avoidance calculations based on detailed vehicle and terrain models. Furthermore, detailed models often do not accurately predict the robot's …
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Sensors for autonomous navigation and hazard avoidance on a planetary micro-rover
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
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Optimal planning and control for hazard avoidance of front-wheel steered ground vehicles
Hazard avoidance is an important capability for safe operation of robotic vehicles at high speed. It is also an important consideration for passenger vehicle safety, as thousands are killed each year in passenger vehicle accidents caused by driver error. Even when hazard locations are known, …
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A unified framework for trajectory planning, threat assessment, and semi-autonomous control of passenger vehicles
… semi-autonomous control of passenger vehicles in hazard avoidance scenarios. The vehicle navigation task is formulated as a constrained optimal control problem with the constraints bounding a navigable region of the environment derived from forward -looking sensors. First, a constrained model …
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Behavioural and physiological responses of myzus persicae to ultraviolet light for the development of new pest control technologies
… these findings into a model of aphid hazard-avoidance, I show that the behaviour of M. persicae may be manipulated to increase its exposure to solar short-wavelength radiation, with consequences for population growth rate. As such, this mechanism may be used in protected agricultural …
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A motion vision system for a Martian Micro-Rover
… assist the Micro-Rover in both navigation and hazard avoidance. The motion estimates, obtained from a Least-Squares fit of the optical flow pattern to the motion field, were within 10% of the actual values. Additionally, obstacle maps, which show the locations of potential hazards on the ground …
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Passive object recognition using intrinsic shape signatures
… planning, navigation, obstacle detection and avoidance, focused object detection, etc. The goal of the project is to have a completely autonomous robot that is safe to use in a human environment. One aspect of the project which would be very beneficial to moving on to more complicated tasks is …
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Determination of Bragg Scatter in an Aircraft Generated Wake Vortex System for Radar Detection
… wingtip generated wake vortices is important for hazard avoidance especially near airports. Aircraft that fly through these hazardous vortices experience sudden induced roll. Experiments have demonstrated that there is sufficient radar cross section for remote detection at frequencies ranging from …
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Characterization and Helicopter Flight Test of 3-D Imaging Flash LIDAR Technology for Safe, Autonomous, and Precise Planetary Landing
… flight tested under the Autonomous Landing and Hazard Avoidance (ALHAT) project (in its fourth development and field test cycle) which is seeking to develop a guidance, navigation, and control (GNC) and sensing system based on lidar technology capable of enabling safe, precise human-crewed or …
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Effects of Increases in Mental Workload on Avoidance of Ground Hazards
… soldier's most basic tasks --- avoiding ground hazards while walking. The participants were 12 U.S. Army infantry soldiers. The study was conducted on a treadmill that was modified to provide the participants a view of impending ground hazards up to 5 meters forward of their walking position. …
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Human Factors Design and Evaluation of Augmented Reality Visualization Techniques for Avoidance of Out-of-View Objects
… to guide users away from objects, for safety or hazard avoidance. We explore the use of these cues in a fast-paced, outdoor and indoor environment, and apply our work to the domain of Search and Rescue, which is a time-critical and often dangerous mission. This work aimed to (1) explore existing …