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.
Results
Showing 1 to 20 of 46 for “"gliders"”.
-
Developing the next generation of Autonomous Underwater Gliders
This thesis presents a novel, hybrid Autonomous Underwater Glider (AUG) architecture developed for improved performance in shallow, high-current environments while maintaining all capabilities inherent to a deep, 1000m-rated AUG. Numerous regions of scientific interest, such as the marginal ice …
-
Developing the Next Generation of Autonomous Underwater Gliders
This thesis presents a novel, hybrid Autonomous Underwater Glider (AUG) architecture developed for improved performance in shallow, high-current environments while maintaining all capabilities inherent to a deep, 1000m-rated AUG. Numerous regions of scientific interest, such as the marginal ice …
-
Efficient Motion Planning and Control for Underwater Gliders
Underwater gliders are highly efficient, winged autonomous underwater vehicles that propel themselves by modifying their buoyancy and their center of mass. The center of mass is controlled by a set of servo-actuators which move one or more internal masses relative to the vehicle's frame. Underwater …
-
An efficient way for path planning of cooperative autonomously soaring gliders
Made available in DSpace on 2015-07-22T22:18:09Z (GMT). No. of bitstreams: 2 ZAMAN-THESIS-2015.pdf: 2013042 bytes, checksum: 31e119555d43a7cb77c3a0b2dd9b0a5a (MD5) LICENSE.txt: 4211 bytes, checksum: 29d447deaca356bfb55a4cfd8c8912cf (MD5) Previous issue date: 2015-05-01
-
The Gulf Stream: along-stream evolution of volume transport and water properties observed by underwater gliders
… collected using Spray autonomous underwater gliders from 2004 through 2020 fill a 1500-km-long gap in longer-term sustained subsurface measurements of the Gulf Stream. The gliders provide concurrent, high-resolution measurements of Gulf Stream hydrography and velocity over more than 15 …
-
A simulator study of the horizontal landing characteristics and piloting techniques for manned re-entry gliders
… tangential landing of a class of manned re-entry gliders was conducted to determine the piloting techniques and vehicle parameters which best define the approach and landing problem. Tests were conducted on. 5 configurations typical of proposed vehicles with maximum lift to drag ratios of 3 to 5. …
-
The Gulf Stream: Along-stream evolution of volume transport and water properties observed by underwater gliders
… collected using Spray autonomous underwater gliders from 2004 through 2020 fill a 1500-km-long gap in longer-term sustained subsurface measurements of the Gulf Stream. The gliders provide concurrent, high-resolution measurements of Gulf Stream hydrography and velocity over more than 15 …
-
Improving Seaglider Efficiency: An Analysis of Wing Shapes, Hull Morphologies, and Propulsion Methods
<p>Autonomous underwater gliders are a family of autonomous underwater vehicles used for long-term observation of oceanic environments. These gliders leverage changes in buoyancy and the resulting vertical motion, to generate forward locomotion via hydrodynamic surfaces. In order to function for …
-
Hydrodynamic Modeling for Autonomous Underwater Vehicles Using Computational and Semi-Empirical Methods
Buoyancy driven underwater gliders, which locomote by modulating their buoyancy and their attitude with moving mass actuators and inflatable bladders, are proving their worth as efficient long-distance, long-duration ocean sampling platforms. Gliders have the capability to travel thousands of …
-
Ecology of greater gliders, Petauroides Volans Kerr 1792, in relation to variations in habitat quality in eucalypt forests in south-east New South Wales
… of resident adult P. volans at the two sites. Gliders at Wadbilliga had a relatively even distribution across the site and most of the site was permanently occupied. In contrast, gliders at Morton had an extremely clumped distribution. The majority of the site was unoccupied (forest type A) and …
-
Ecology of greater gliders, Petauroides Volans Kerr 1792, in relation to variations in habitat quality in eucalypt forests in south-east New South Wales
… of resident adult P. volans at the two sites. Gliders at Wadbilliga had a relatively even distribution across the site and most of the site was permanently occupied. In contrast, gliders at Morton had an extremely clumped distribution. The majority of the site was unoccupied (forest type A) and …
-
Nestbox use and predicted distribution of the southern greater glider (Petauroides volans) following the Black Summer megafires.
… Conservation Act 1999. Southern greater gliders are fire-sensitive and severely threatened by the loss of hollow-bearing trees associated with logging and altered fire regimes. In 2019/2020, after an extended period of drought, south-eastern Australia experienced wildfires over an …
-
Nestbox use and predicted distribution of the southern greater glider (Petauroides volans) following the Black Summer megafires.
… Conservation Act 1999. Southern greater gliders are fire-sensitive and severely threatened by the loss of hollow-bearing trees associated with logging and altered fire regimes. In 2019/2020, after an extended period of drought, south-eastern Australia experienced wildfires over an …
-
Equatorial ocean dynamics impacting upwelling west of the Galápagos Archipelago
… not well understood. The 'Repeat Observations by Gliders in the Equatorial Region' (ROGER) program deployed a fleet of Spray autonomous underwater gliders in the region just west of the Galápagos Archipelago from 2013 - 2016 with the goal of continuously occupying three transects that form a …
-
Analytical and Numerical Optimal Motion Planning for an Underwater Glider
… and research is becoming more common. Underwater gliders are a specific class of AUV that do not use conventional propulsion. Instead they change their buoyancy and center of mass location to control attitude and trajectory. The vehicles spend most of their time in long, steady glides, so even …
-
Path planning in time dependent flows using level set methods
Autonomous underwater vehicles such as gliders have emerged as valuable scientific platforms due to their increasing uses in several oceanic applications, ranging from security, acoustic surveillance and military reconnaissance to collection of ocean data at specific locations for ocean prediction, …
-
Reachability prediction and optimal path planning for autonomous ocean vehicles
… Set methods. We apply this methodology to ocean gliders and floats during several real-time sea experiments—the Mini-Adaptive Sampling Test Run (MASTR) and Grand Adaptive Sampling Experiment (GRASE) in the Gulf of Mexico, and the New England Seamounts Acoustic (NESMA) experiment in the North …
-
Equatorial ocean dynamics impacting upwelling west of the Galápagos Archipelago
… not well understood. The ‘Repeat Observations by Gliders in the Equatorial Region’ (ROGER) program deployed a fleet of Spray autonomous underwater gliders in the region just west of the Galápagos Archipelago from 2013 – 2016 with the goal of continuously occupying three transects that form a …
-
Optimal Paths in Gliding Flight
Underwater gliders are robust and long endurance ocean sampling platforms that are increasingly being deployed in coastal regions. This new environment is characterized by shallow waters and significant currents that can challenge the mobility of these efficient (but traditionally slow moving) …
-
Landscape furniture house
… about fish. even when they fly. twirling gliders. make my day. curving perfect while i swerve ascending. i am free when i ski. but fish are in the quarry. by the cliff. where men look under the curving roof up into the sky.
Page 1 of 3