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 127 for “"Vibratory"”.
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Vibratory conveyors
A review of the previous work on the mechanics of vibratory conveying is given., It is found that several theoretical studies have been made in the past but the predictions of the theories and the comparisons of these' with experimental results have only been applicable to a very limited range of …
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Factors influencing laboratory vibratory compaction
… and what the factors are which affect laboratory vibratory compaction. The study revealed that extensive research has been carried out in the USA and Europe, where standard laboratory compaction tests exist for the determination of the maximum dry density of cohesionless, free-draining soil. The …
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Performance limitations of vibratory gyroscopes.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1965. Sc.D.
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Thermal effects upon human vibratory sensitivity
Vibrotactile sensitivity is measured using a "dry" procedure as opposed to a "wet" procedure previously used. Thresholds are determined using 40 Hz and 160 Hz stimuli across seven temperatures ranging from 20°C to 44°C. Twelve male subjects participated in each of four sessions, producing a high …
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Capacitive transducers for narrow-band vibratory displacements
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1962.
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A numerical and experimental investigation of vibratory bowl feeders
Vibratory bowl feeders are widely used in automation processes for the storage, feeding and orientation of identical components for presentation to workstations or other mechanical handling devices. The investigation described here has been directed at modelling the dynamiC behaviour of vibratory …
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Development of a Closed Loop Control System for Vibratory Milling
… modelling and experimental implementation of vibratory milling process are presented and explored in depth. The modelling focused on the control system which tracked and regulated the vibration amplitude in the cutting zone during machining. Here, hardware and software of advanced technology …
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Dynamic investigation of vibratory screen response in a FEM environment
Effective models of vibratory screens which can capture the true response characteristics are crucial in the understanding of faults and failures which occur in vibratory screens. However, the current available models are usually simplified and have limited validation to that of a physical screen. …
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Propeller tip vortex impingement and vibratory force on a rudder.
Massachusetts Institute of Technology. Dept. of Ocean Engineering. Thesis. 1974. M.S. (Also M.S. in Mechanical Engineering).
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Tactile perception of spatially distributed vibratory stimuli on the fingerpad
… vibrotactile perception. The passive touch with vibratory stimuli in the low frequency could be an alternative of the active touch for the presented stimuli: polygons, round shapes and gratings. As for the effect of frequency on the texture discrimination, the high correct answer proportions …
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Compaction of soil by a vibratory roller: a theoretical description
This study models the compaction of soil by a vibratory roller compactor and examines changes to current designs that may provide more efficient compaction. The modeling of the soil differs from previous analyses of the compaction process in its use of a distributed-parameter characterization of …
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Analysis and Compensation of Imperfection Effects in Piezoelectric Vibratory Gyroscopes
Vibratory gyroscopes are inertial sensors, used to measure rotation rates in a number of applications. The performance of these sensors is limited by imperfections that occur during manufacture of the resonators. The effects of resonator imperfections, in piezoelectric vibratory gyroscopes, were …
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An investigation into Vibratory Grinding of hard-to Machine Aerospace Materials
There is an increased demand for high surface finishes and tight tolerances, especially in high value manufacturing processes. However, progress in materials science has led to the development of new materials especially in the aerospace industry, where high heat resistance materials are preferred …
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The effect of vibratory loading on vertical model piles in clay
The results of numerous vibratory tests on model piles in clay are presented in this thesis with the purpose of studying the behavior of piles subjected to vibratory loadings. The effects of pile length, time after driving, soil consistency, dynamic force amplitude, and free water surrounding the …
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Transfer matrix analysis of an electrohydraulically driven rotary- vibratory drilling system
… transfer matrix model for the longitudinal vibratory component of a rotary-vibratory drilling (RVD) system driven with an electrohydraulic inertial mass exciter. The RVD system is a hybrid drilling system consisting of a conventional rotary drilling system assisted by forced harmonic …
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Experimental and numerical investigation of vibratory drum interacting with layered elastic media
Includes bibliographical references.
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Analysis of mechanical drift error in the JPL/UCLA micromachined vibratory gyroscope
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
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Influence of Vibratory Plantar Stimulation on Cortical Motor Planning and Spatiotemporal Step Parameters
… previous literature suggests that plantar vibratory stimulation can improve balance and reduce gait variability, its influence on cortical motor planning remains unclear. This study examined whether augmenting plantar mechanoreception with vibratory insoles influences PMC activity during …
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MORPHOLOGY, MATERIAL AND VIBRATORY PROPERTIES OF THE SWIMBLADDER IN THE CARP, CYPRINUS CARPIO
The carp Cyprinus carpio has a two-chambered swimbladder and excellent hearing. I explored the hypothesis that the anterior chamber, which connects to Weberian ossicles, is adapted for hearing by testing both chambers for material properties. I also determined displacement and auditory responses to …
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