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 361 for “"Bearings"”.
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Controlled externally pressurized bearings
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1960.
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Design of linear hydrostatic bearings
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Surface self-compensated hydrostatic bearings
… several unique advantages over rolling element bearings. The thin fluid film between the bearing pads and the rail provides virtually infinite motion resolution due to lack of static friction, very low straightness ripple, high squeeze film damping, potentially infinite bearing life, immunity to …
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Fault detection of rolling element bearings
… signals from both the artificially defected bearings and bearings running from normal till failure are performed. It was found that both methods work well for field applications.When the signal to noise ration is low, we can pre-process the signal with harmonic analysis to extract the fault …
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Radial deflections of cylindrical roller bearings
Thesis: B.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1944
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Self-stabilizing magnetic bearings for flywheels
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1982.
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Rubber bearings for precision positioning systems
… or laminates of metal and rubber sheets as bearings in precision positioning systems. Such bearings have the potential to replace more conventional flexures fabricated for instance from metal. Rubber bearings also potentially have advantages in for example ease and low-cost of fabrication, …
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Passive stabilization of flywheel magnetic bearings
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1980.
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Controller design for precision magnetic bearings
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Active Magnetic Bearings used as an Actuator for Rotor Health Monitoring in Conjunction with Conventional Support Bearings
… rotor health monitoring by using Active Magnetic Bearings (AMBs) as actuators for applying a variety of known force inputs to a spinning. Similar to modal analysis and other nondestructive evaluation (NDE) techniques which apply input signals to static structures in order to monitor responses; …
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Dynamic behaviour of oil lubricated journal bearings
… the dynamic behaviour of oil lubricated journal bearings and particularly with the small vibrations about the equilibrium position known as 'oil whirl'. The importance of shaft flexibility and oil film cavitation to this phenomena are investigated. Several authors have shown that by the use of …
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Assembly Optimization for Double Row Ball Bearings
… on optimal assembly methods for double row ball bearings. As with common single row bearings, double row ball bearings, consist of four general components, namely, an inner ring, an outer ring, a complement of balls and a cage or retainer to keep the balls separate. Unlike single row bearings, …
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Diffusion problems in lead-tin overlay bearings
The corrosion of lead-tin overlay bearings in hot lubricating oils, through the depletion of tin in the overlay, has been recognised as a problem of some severity in the automotive bearing industry. The inter-diffusion of tin in the overlay and the copper in the underlying substrate results in the …
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Reaction Wheel Ball Bearings Microvibration Source Characterisation
The microvibration disturbances originating from high speed rotating devices such as Reaction Wheel Assemblies (RWA) have been a satellite stability issue since the beginning of the human space exploration. The potential RW rotor unbalances, assembly misalignments and imperfections affecting the …
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Carbon nanotube bearings in theory and practice
… Nanotubes (CNTs) are attractive elements for bearings in Micro-Electro-Mechanical Systems (MEMS), because their structure comprises nested shells with no bonding and sub-nanometer spacing between them, enabling relative motion with low friction and wear. A few demonstrations of CNT bearings …
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Low order models for hybrid gas bearings
A low order model was created to analyze a small scale gas bearing designed for the MIT microfabricated gas turbine engine. The journal has a diameter of 4.1 mm and is designed to spin at 2 million rpm. Due to microfabrication constraints, the bearing will have a very low length to diameter ratio …
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Testing and analysis of hybrid magnetic bearings
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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Analysis and design of precision magnetic bearings
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1993.
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