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 106 for “"Tumbling"”.
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Rendezvous approach guidance for uncooperative tumbling satellites
… guidance algorithm for approaching uncooperative tumbling satellites has multiple purposes including on-orbit satellite servicing, space debris removal, asteroid mining, and on-orbit assembly. This thesis develops a guidance algorithm within the framework of on-orbit satellite servicing, but is …
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Spotting techniques for progressive tumbling in girls gymnastics
Digitized by Kansas Correctional Industries
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Spotting techniques for progressive tumbling in girls gymnastics
Digitized by Kansas Correctional Industries
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Aquapod: the design of small amphibious tumbling robot.
University of Minnesota M.S. thesis. June 2012. Major: Mechanical engineering. Advisor:Nikos Papanikolopoulos. 1 computer file (PDF); viii, 86 pages, appendices A-B.
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Optimal docking to tumbling objects with uncertain properties
… objects, 3) uncooperative satellites, 4) tumbling behavior, 5) uncertainty in the knowledge of this tumble, and 6) the need to maneuver at least one of the satellites through an accelerated approach trajectory. This thesis considers challenges 3 through 6 by addressing the terminal …
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Safe Tumbling of Heavy Objects Using a Two-Cable Crane
… for less experienced workers. Automating the tumbling process is made challenging due to the presence of kinematic and static singularities which are shown to occur when a single-cable crane loses control over the block being tumbled. Here, an autonomous method for safely tumbling a heavy …
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Polynomial motion planning in spacecraft attitude and docking to tumbling debris
… motions in the frame of docking to a tumbling satellite for Active Debris Removal missions (in which the detumbling case is also studied). In the case of attitude slew manoeuvres, quaternions are shaped with polynomials and normalised.Issues such as numerical stability of high-order …
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Real-time quasi-analytical trajectory generation for docking with tumbling objects
The capability to rendezvous and dock with tumbling objects has become prominent with increased interest in active debris removal, satellite servicing, and in-space assembly. Guidance and control algorithms have been developed in the literature to allow for a spacecraft to capture an uncooperative …
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A study of cross-age tumbling teaching to first grade students
… sex, tutor sex, tutor grade level, and tutor tumbling ability, on a cross-age tumbling teaching program for first grade students. In addition, all first order factor interactions were studied for effect. And, 2) To compare the skill gains of those subjects taught by an upper grade tutor, …
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Developing a methodology for characterising in-situ viscosity profiles in tumbling mills
… of the material in the mill. Slurries in tumbling mills are known to exhibit non-Newtonian behaviour. This means slurry viscosity is not constant but is a function of shear rate. To characterize slurry transport in the mill it is necessary to study the viscosity distributions in order to …
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Development of control and autonomy algorithms for docking to complex tumbling satellites
… an uncooperative spacecraft that is freely tumbling. In order to safely maneuver about an uncontrolled satellite, an online trajectory planning algorithm with obstacle avoidance employed in a GN&C architecture is necessary. The main research contributions of this thesis is the development of …
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The Effects of Land Use on Tumbling Creek Cave in Taney County, Missouri
… on water quality. The study site is composed of Tumbling Creek Cave, the recharge area of the cave system, and surface streams linked to the cave system. This cave is of specific interest because of the karst nature of the area and the recent implementation of Better Management Practice (BMP). …
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Circulation rate modelling of tumbling mill charge using positron emission particle tracking (PEPT)
… of charge circulation trends as observed in tumbling mills at different operating conditions. Of particular interest is the underlying assumptions being made by many mill models that a particle imparts energy for potential breakage only once per revolution of the mill to the charge body – …
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Autonomous rendezvous and docking with tumbling, uncooperative, and fragile targets under uncertain knowledge
As efforts to expand humanity's presence in space continue to increase, a need for spacecraft to autonomously perform in-space close proximity maneuvers without a human operator increases, as well. Such in-space close proximity maneuvers include active debris removal, satellite servicing, and …
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Effect of Hot Processing, Mechanical Tenderization, and Tumbling on Ham Yield and Quality Characteristics
… processing, mechanical (knife) tenderization, tumbling method (continuous or intermittent) and processing time (4 hours or 24 hours) on uncooked and cooked section and formed ham (pork adductor-semimembranous and biceps femoris muscles) characteristics was evaluated. Hot (pre-rigor) processed …
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Direct numerical simulation of a tumbling short cylinder in low Reynolds number compressible flow
Limited Restriction Lifted for Item 50492 on 2016-09-22T20:59:06Z.
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On-line sensors for measuring the total ball and charge level in tumbling mills
Tumbling mills are still the mostly used milling device in the mineral processing industry for both coarse and fine grinding applications. A number of factors affect the performance of tumbling mill. One of these factors is volumetric filling which is the volume of charge in the mill expressed as a …
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Probability based models for the power draw and energy spectra of a tumbling mill
… the power draw and collision energy spectra of a tumbling mill. Experiments are conducted using dry spherical glass bead charge in a laboratory scale tumbling mill, which is mounted with a torque transducer and tachometer to measure mill power. Particle tracking information from PEPT is used to …
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A one-way coupled DEM-CFD scheme to mode free-surface flows in tumbling mills
… for accurate prediction of slurry flows in tumbling mills. This flow is currently best understood through empirical, mechanistic and computational models. In the case of computational models, a realistic description of the system requires two fluid phases (for slurry and air) and one solid …
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A comparison of the effects of two teaching styles on tumbling skill acquisition of college students
… the command and reciprocal teaching style on the tumbling skill acquisition of college students. Fifty-one undergraduate students from Virginia State University in Petersburg, Virginia served as subjects. Subjects were pretested to assess their performance on twelve tumbling skills. Two raters …
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