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Robust control for gantry cranes /Costa, Giuseppe. January 1999 (has links)
Thesis (M.E.)--University of New South Wales, 1999. / Also availalbe online.
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Berth and quay crane scheduling problems, models and solution methods /Ak, Aykagan. January 2008 (has links)
Thesis (Ph.D)--Industrial and Systems Engineering, Georgia Institute of Technology, 2009. / Committee Chair: Erera, Alan L.; Committee Member: Ergun, Ozlem; Committee Member: Savelsbergh, Martin; Committee Member: Tetali, Prasad; Committee Member: White III, Chelsea C.. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Interfaces and control systems for intuitive crane controlPeng, Chen Chih. January 2009 (has links)
Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2010. / Committee Chair: Singhose, William; Committee Member: Sadegh, Nader; Committee Member: Ueda, Jun. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Automated Mobile CranesNilsson, Henrik, Svensson, Anders January 2015 (has links)
No description available.
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Genome Sizes of Granes (Aves: Gruiformes)Rasch, Ellen 01 December 2006 (has links)
The DNA content of blood cell nuclei of 15 species of cranes was determined by Feulgen-DNA cytophotometry. Genome sizes agree with values reported elsewhere for several crane species analyzed by flow cytometry. Males have more DNA per cell than females in several species. A karyotype where 2n = 80 is reported for a male greater sandhill crane.
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Reliability based codification for the design of overhead travelling crane support structuresDymond, Juliet Sheryl 12 1900 (has links)
Thesis (PhD (Civil Engineering))--University of Stellenbosch, 2005. / Electric overhead travelling bridge cranes are an integral part of many industrial
processes, where they are used for moving loads around the industrial
area
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The numerical simulation of wheel loads on an electric overhead travelling craneMcKenzie, Kim Anne 12 1900 (has links)
Thesis (MEng (Civil Engineering))--University of Stellenbosch, 2007. / The failure rate of electric overhead travelling crane supporting structures across the world is
unacceptably high. Failures occur even when the supporting structures are designed within the
relevant design codes. This demonstrates a lack of understanding of the dynamic behaviour of
cranes in many design codes.
The current South African loading code is simplistic with respect to crane supporting structure
design, relying on empirical factors to determine the correct loads. While these factors lead to
predicted forces in the correct range of values, the Eurocode’s methods are more scientifically
based. In recognition of this the draft South African code predominantly incorporates the
methods used by the Eurocode to calculate design forces for crane supporting structures.
The purpose of this thesis was to use an existing numerical model to determine the wheel
loads induced by a crane into the crane supporting structure through hoisting, normal
longitudinal travel, skewing and rail misalignment. The numerically obtained forces were then
compared with the design forces estimated in the current South African code and the
Eurocode, in order to determine whether the factors and methods used in the codes are
accurate.
The current empirically based South African code was found to be highly conservative. In
contrast the scientifically based design forces from the Eurocode were close to the
numerically calculated forces, only failing to predict the behaviour of the crane in the case of
skewing. Further work needs to be completed in the estimation of forces induced during this
load case. Once this is achieved it is hoped that the better understanding of the crane forces
adapted from the Eurocode into the draft South African code will lead to a reduction in
failures of electric overhead travelling crane supporting structures.
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Tip-over stability analysis for mobile boom cranes with single- and double-pendulum payloadsFujioka, Daichi 08 July 2010 (has links)
This thesis investigated a tip-over stability of mobile boom cranes with swinging payloads. Base and crane motion presents a tip-over problem. Attaching complex payloads further complicates the problem. They study began with a single-pendulum payload to analyze a tip-over stability characteristics under different conditions. A simple tip-over prediction model was developed with a goal of limiting a computational cost to a minimum. The stability was characterized by a tip-over stability margin method. The crane's tip-over stability was also represented by the maximum possible payload it can carry throughout the workspace. In a static stability analysis, mobile boom crane was assumed to be stationary, thus with no payload swing. The study provided basic understanding on the relationship between tip-over stability and boom configuration. In a pseudo-dynamic stability analysis, the method incorporated payload swing into the analysis by adding estimated maximum payload swing due to motions. To estimate the angles, differential equations of motions of payload swings were derived. The thesis extended the study to a double-pendulum payload. The maximum swing angles estimated in the single-pendulum case were directly applied to the double-pendulum case. To validate the analytical methods, a full dynamic multi-body simulation model of a mobile boom crane was developed. The predictions from the previous analysis were verified by the simulation results. The prediction model and the analytical methods in the thesis provide a significant tool for practical application of tip-over stability analysis on mobile boom cranes. The experimental results increase the confidence of the study's accuracy.
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Dynamics and control of a small-scale mobile boom craneMaleki, Ehsan A. 14 July 2010 (has links)
Boom cranes are one of the most dynamically complicated types of cranes because they possess rotational joints as opposed to the linear tracks of bridge and gantry cranes. In addition, if the boom crane is placed on a mobile base, additional complexity is added to the system. However, mobile boom cranes have huge potential benefits as they can be quickly transported from one location to another. Furthermore, if they utilize their mobile base during lifting operations, then they can have an extremely large workspace. All cranes share the same limiting weakness; the payload oscillates when the crane moves. A command-generation approach is taken to control the payload oscillation. Input shaping is one such command-generation technique that modifies the original reference command by convolving it with a series of impulses. The shaped command produced by the convolution can then move the crane without inducing payload oscillation. Input shaping can accommodate parameter uncertainties, nonlinearities, multiple modes of vibration, and has been shown to be compatible with human operators. This thesis focuses on three aspects of mobile boom cranes: 1) dynamic analysis, 2) input-shaping control, and 3) experimental testing. A majority of the thesis focuses on analyzing and describing the complicated dynamics of mobile boom cranes. Then, various input-shaping controllers are designed and tested, including two-mode shapers for double-pendulum dynamics. In order to experimentally verify the simulation results, a small-scale mobile boom crane has been constructed. The details of the mobile boom crane and its important features are presented and discussed. Details of the software used to control the crane are also presented. Then, several different experimental protocols are introduced and the results presented. In addition, a set of operator performance studies that analyze human operators maneuvering the mobile boom crane through an obstacle course is presented.
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Management of captive whooping cranes (Grus americana) to improve breeding behaviour and successWhite, Jennifer L. January 1900 (has links) (PDF)
Thesis (M.E. Des.)--University of Calgary, 2000. / Includes bibliographical references.
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