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 50 for “"gyroscopic"”.
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Gyroscopic Stabilization of a Spheromak Plasma
Made available in DSpace on 2017-07-06T18:56:08Z (GMT). No. of bitstreams: 3 Saoutic_Bernard_MS.pdf: 26308989 bytes, checksum: 5dad1b51fdd94f7c88e9fb231a936fc9 (MD5) Saoutic_Bernard_MS_ABS.pdf: 485241 bytes, checksum: 437f29bb57ef6f00f7393e0798dc6997 (MD5) license.txt: 4813 bytes, checksum: …
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Perturbation methods for slightly damped gyroscopic systems
… the eigenvalue problem associated with linear gyroscopic systems for which the damping and/or circulatory effects are sufficiently small that they can be regarded as perturbations. The perturbation theory is applied to an example of such a system. One interesting aspect of this example is that …
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Dynamics and Stability of Parametrically Excited Gyroscopic Systems
… randomly perturbed nonlinear gyroscopic systems close to a double zero resonance. It is shown that the long term behaviour of the original four-dimensional system can be approximated by a one dimensional Markov process which take values on a line or a graph. These results are …
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Optimization of a Gyroscopic Satellite General-Relativity Experiment
Made available in DSpace on 2014-12-09T18:12:24Z (GMT). No. of bitstreams: 1 6910806.pdf: 5175625 bytes, checksum: 9caf8d3ad0f9ae832decf575364896b7 (MD5) Previous issue date: 1968
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Stochastic stability and global bifurcations in gyroscopic mechanical systems
The stability and bifurcation behavior of mechanical systems parametrically excited by small periodic or stochastic perturbations is studied. In the case of random excitation, the almost-sure and moment asymptotic stability of two- and four-dimensional dynamical systems subject to small intensity …
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The Icarus Machine : a kinetic sculpture that demonstrates gyroscopic precision
… a kinetic sculpture that demonstrates gyroscopic precession. The aim of this project is to explore the interplay between two seemingly separate fields, art and engineering, and the effect of their union on perception and learning.
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Excitation of gyroscopic precession in overhung rotors at critical speeds
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1953.
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Development of a Magnetic Levitation System for High Gyroscopic Moment Rotors
L'abstract è presente nell'allegato / the abstract is in the attachment
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Bifurcations of Parametrically Excited Gyroscopic Systems Near a 0 : 1 Resonance
… study of the global bifurcations of the two gyroscopic systems. Using recently developed bifurcation methods, we detect the presence of multi-pulse orbits homoclinic to a slow manifold. In certain parameter regions, we can prove that multi-pulse orbits exist which are homoclinic to fixed …
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Geometrical Investigation on Escape Dynamics in the Presence of Dissipative and Gyroscopic Forces
… dynamics, will reveal how the dissipative and gyroscopic forces change the phase space structure that governs the escape (or transition) from potential wells. In higher degree of freedom systems, the motion between potential wells is complicated due to the existence of multiple escape routes …
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Dynamics of multi-body space interferometers including reaction wheel gyroscopic stiffening effects : structurally connected and electromagnetic formation of flying architectures
Space telescopes have the potential to revolutionize astronomy and our search for life-supporting planets beyond our Solar System. Free of atmospheric distortions, they are able to provide a much "clearer" view of the universe than ground-based telescopes. A developing technology that appears …
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Test and analysis methods for resolving fan/motor vibration problems in air-conditioning units
… fan impeller unbalance, taking into account the gyroscopic effect of the rotating fan impeller; Two air-conditioning units were investigated in the project. They were designated as test units #1 and #2. For the test unit #1 and test unit #2, the vibration problems associated with fan impeller, …
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Dynamics of High-Speed Planetary Gears with a Deformable Ring
… are different for spinning systems with gyroscopic effects and stationary systems without gyroscopic effects. Vibration modes for stationary systems are real-valued standing wave modes, while those for spinning systems are complex-valued traveling wave modes. Stationary planetary gears …
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Design and Development of a Self-Balancing Bicycle Using Control Moment Gyro
This thesis reports the use of gyroscopic stabilization to balance kid-size bicycle. A self-balancing bicycle is a non-linear unstable system similar to that of an inverted pendulum. Experimental results show the robustness and efficiency of a proportional plus derivative (PD) controller balancing …
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Modeling and vibration analysis of a rocking–mass gyroscope system
… of motion clearly show the presence of the gyroscopic couplings in all cantilever beams. A computer simulation model in its most general form has been developed, to analyze the effectiveness of this type of gyroscope.
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Design optimization of rotating bodies
… the important effects of rotary inertia and gyroscopic moments, the equation of motion for the continuous rotor is obtained. The solution of this equation leads to a generalized eigenvalue problem. The resulting natural frequencies and eigenmodes are target values of our optimization. The …
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Understanding the nervous system as an information processing machine: dense, nonspecific, canonical microcircuit architecture of inhibition in neocortex . . .
… the algorithmic problem of how flies could use gyroscopic sensors to calculate angular velocity.
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Computer-aided design software for rotor dynamics analysis
… synchronous unbalance response, critical speed, gyroscopic effect, critical speed map, and stability. The method of solution is based on the Transfer Matrix approach containing both real and complex variable notations for deriving the overall system matrices. Muller's Method is applied to search …
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Spin dynamics of space stations under transient and steady-state excitations and stabilizing responses
… are introduced. Two stability systems, a gyroscopic wobble damper and a proportional jet damper are represented mathematically, and the motion of the station under the external disturbances has been determined with and without the effects of these stability systems. Computer results for a …
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Quaternion-Based Human Gesture Recognition System Using Multiple Body-Worn Intertial Sensors
… collected from eleven participants using five gyroscopic motion sensors tied to their upper body. A total of 1080 samples were collected, which contain almost 6000 gestures collected within a span of 90 minutes. The data were processed and fed into a multiclass Pattern Classification system to …
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