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 2361 for “"navigation"”.
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Direct passive navigation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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Collision Avoidance and Navigation of UAS Using Vision-Based Proportional Navigation
… laws are based on the principle of proportional navigation (Pro-Nav), which states that a UAV is on a collision course with another vehicle or object if the line-of-sight (LOS) angles to the object remain constant. The guidance laws are designed for use with monocular electro-optical devices, …
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Human Visual Navigation: Effects of Visual Context, Navigation Mode, and Gender
… authentic virtual environments. Real-world navigational experience was further simulated, through the inclusion of a large roundabout on the route. Three semi-surrounding screens provided a wide field of view. Participants were able to perform the task, but directional estimates showed …
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Navigation Aids In Route Training: Increase Navigation Speed, Decrease Route Retention?
… route. This leads to three questions, (a) will navigation aids affect initial route navigation; (b) will navigation aids affect retention; and (c) will navigation aids affect situation awareness while en route? The hypotheses of this study were that navigation aids would significantly increase …
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Mechanisms underlying spatial navigation
… provide a static map of space. Current models of navigation propose that this static grid cell map is used to support navigation behaviours. However, recent work shows that this grid map also conveys information about rewards and is deformed by environmental geometry, suggesting that grid cells …
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Robust autonomous vehicle navigation
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2002.
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Integrating mapping and navigation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1998.
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Precision autonomous underwater navigation
… vehicle (AUV) technology, requires precise navigation and guidance. As science requirements and engineering capabilities converge, navigating in the sensor-limited ocean remains a fundamental challenge. Despite the logistical cost, the standards of archaeological survey necessitate using …
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Network navigation with scheduling
Network navigation is a promising paradigm for enabling location-awareness in dynamic wireless networks. A wireless navigation network consists of agents (mobile with unknown locations) and anchors (possibly mobile with known locations). An agent can estimate its locations based on inter- and …
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Vision based robot navigation
In this thesis we propose a vision-based robot navigation system that constructs a high level topological representation of the world. A robot using this system learns to recognize rooms and spaces by building a hidden Markov model of the environment. Motion planning is performed by doing …
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Proportional navigation target tracking
… Because most anti-ship missiles use proportional navigation in their guidance systems, it is best to model their motion using the proportional navigation guidance law. An unbiased narrowband filter is required because the state estimate is used to extrapolate the trajectory over the long time of …
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Mindful navigation with guiding light : design considerations for projector based indoor navigation assistance system
… technology. Research has shown how automated navigation assistance systems lead users to be disengaged from the space through which they are traveling, resulting in poor recollection of the environment and poorer situational decision-making. This disengagement and mindlessness can potentially …
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Lifelong, learning-augmented robot navigation
… perceptual capability supporting planning, navigation, and control. We are interested in improving the expressiveness and operational longevity of SLAM systems. In particular, we are interested in leveraging state-of-the-art machine learning methods for object detection to augment the maps …
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Geomagnetic Aided Dead-Reckoning Navigation
<p>The dependence of modern navigation methods on global positioning systems has led to developing alternative algorithms for localization, capable of providing reliable and robust estimations. Global position system is commonly used in a vast majority of the world’s devices, and it can supply real …
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Optimal Image-Aided Inertial Navigation
The utilization of cameras in integrated navigation systems is among the most recent scientific research and high-tech industry development. The research is motivated by the requirement of calibrating off-the-shelf cameras and the fusion of imaging and inertial sensors in poor GNSS environments. …
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Robot navigation using ultrasonic feedback
This thesis presents an autonomous navigation program for West Virginia University's mobile robot platform ANT. The program allows the ANT to find a predefined goal by comparing sensor data with a given map of the environment. ANT's ultrasonic sensors were used to sample the surroundings …
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Navigation agents and traffic simulation
… thesis addresses the development of intelligent navigation agents for traffic simulation. Discussions are made on issues considering the underlying data structure, the algorithms used for the creation of the data structures, the specification of various agents, and their performance. It also …
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Reliable dynamic in-vehicle navigation
… off from luxury makes and models, in-vehicle navigation systems are now gradually spreading through the entire vehicle fleet, as drivers appreciate their usefulness. Increasingly sophisticated systems are being developed, having much more advanced functions than simple driving directions. This …
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Mathematical Modelling of Animal Navigation
… the world at many different scales. Among their navigation abilities is an intriguing skill which allows them to navigate in the absence of familiar landmarks or outward journey information. This skill is hypothesised to be an ability to use a map and compass. Animals are known to use a variety …
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