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Proceedings Papers

A Theoretical and Numerical Development of the Concept of the Active Control Foil Bearing (ACFB)

M. J. Braun, F. K. Choy, M. Dzodzo, J. Hsu, R. Veillette, D. Deckler
Proc. ASME. GT1995, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, V005T14A008, June 5–8, 1995
Publisher: American Society of Mechanical Engineers
Paper No: 95-GT-172
https://doi.org/10.1115/95-GT-172
View Paper titled, A Theoretical and Numerical Development of the Concept of the Active Control Foil Bearing (ACFB)
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Topics: Foil bearings, Feedback, Magnetic bearings, Stability, Bearings, Control equipment, Damage, Design, Dynamics (Mechanics), Equilibrium (Physics)
Proceedings Papers

Oil Debris Detection Using Static and Dynamic Capacitance Measurements

S. V. Murali, F. K. Choy, J. Zhe, J. Carletta, X. Xia
Proc. ASME. IJTC2008, STLE/ASME 2008 International Joint Tribology Conference, 241-243, October 20–22, 2008
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2008-71280
https://doi.org/10.1115/IJTC2008-71280
View Paper titled, Oil Debris Detection Using Static and Dynamic Capacitance Measurements
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Topics: Capacitance, Electrodes, Metals, Particulate matter, Wire, Capacitors, Microchannels, Nonferrous wire, Plates (structures)
Proceedings Papers

Oil Debris Detection Using Capacitance and Ultrasonic Measurements

J. Zhe, F. K. Choy, S. V. Murali, M. A. Sarangi, R. Wilfong
Proc. ASME. IJTC2007, ASME/STLE 2007 International Joint Tribology Conference, Parts A and B, 113-115, October 22–24, 2007
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2007-44279
https://doi.org/10.1115/IJTC2007-44279
View Paper titled, Oil Debris Detection Using Capacitance and Ultrasonic Measurements
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Topics: Capacitance, Ultrasonic measurement, Particulate matter, Particle size, Ultrasonic waves
Proceedings Papers

Transient and Steady State Vibration Analysis of a Wavy Thrust Bearing

Hongmei Zhao, F. K. Choy, M. J. Braun
Proc. ASME. TRIB2004, ASME/STLE 2004 International Joint Tribology Conference, Parts A and B, 581-587, October 24–27, 2004
Publisher: American Society of Mechanical Engineers
Paper No: TRIB2004-64144
https://doi.org/10.1115/TRIB2004-64144
View Paper titled, Transient and Steady State Vibration Analysis of a Wavy Thrust Bearing
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Topics: Stability, Steady state, Thrust bearings, Transients (Dynamics), Vibration, Vibration analysis
Proceedings Papers

Vibration Monitoring and Damage Quantification of Faulty Ball Bearings

F. K. Choy, J. Zhou, M. J. Braun, L. Wang
Proc. ASME. TRIB2004, ASME/STLE 2004 International Joint Tribology Conference, Parts A and B, 771-779, October 24–27, 2004
Publisher: American Society of Mechanical Engineers
Paper No: TRIB2004-64142
https://doi.org/10.1115/TRIB2004-64142
View Paper titled, Vibration Monitoring and Damage Quantification of Faulty Ball Bearings
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Topics: Ball bearings, Damage, Vibration, Bearings, Failure, Rolling bearings, Reliability, Frequency-domain analysis, Machinery, Poincaré maps
Proceedings Papers

Vibration Monitoring and Damage Quantification of Ball Bearings for Household Appliances

F. K. Choy, D. Konrad, E. Labus, R. Wu
Proc. ASME. WTC2005, World Tribology Congress III, Volume 2, 169-170, September 12–16, 2005
Publisher: American Society of Mechanical Engineers
Paper No: WTC2005-64126
https://doi.org/10.1115/WTC2005-64126
View Paper titled, Vibration Monitoring and Damage Quantification of Ball Bearings for Household Appliances
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Topics: Ball bearings, Damage, Vibration, Bearings, Accelerometers, Manufacturing, Noise (Sound), Spectra (Spectroscopy), Testing
Journal Articles

Vibration Monitoring and Damage Quantification of Faulty Ball Bearings

F. K. Choy, J. Zhou, M. J. Braun, L. Wang
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. October 2005, 127(4): 776–783.
https://doi.org/10.1115/1.2033899
Published Online: July 5, 2005
View Article titled, Vibration Monitoring and Damage Quantification of Faulty Ball Bearings
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Topics: Ball bearings, Bearings, Damage, Poincaré maps, Vibration, Rotors
Journal Articles

Transient and Steady State Vibration Analysis of a Wavy Thrust Bearing

H. Zhao, F. K. Choy, M. J. Braun
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. January 2006, 128(1): 139–145.
https://doi.org/10.1115/1.2033900
Published Online: June 22, 2005
View Article titled, Transient and Steady State Vibration Analysis of a Wavy Thrust Bearing
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Topics: Bearings, Stability, Steady state, Thrust bearings, Transients (Dynamics), Vibration, Stress
Journal Articles

Damage Identification of a Gear Transmission Using Vibration Signatures

F. K. Choy, Fellow, ASME, D. H. Mugler, J. Zhou
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Technical Papers
J. Mech. Des. June 2003, 125(2): 394–403.
https://doi.org/10.1115/1.1564571
Published Online: June 11, 2003
View Article titled, Damage Identification of a Gear Transmission Using Vibration Signatures
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Topics: Damage, Gears, Signals, Vibration, Wavelet transforms, Wavelets, Computer simulation, Gear teeth, Rotors
Journal Articles

Transient Pressure Analysis in Piping Networks due to Valve Closing and Outlet Pressure Pulsation

F. K. Choy, M. J. Braun, H. S. Wang
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research Papers
J. Pressure Vessel Technol. August 1996, 118(3): 315–325.
https://doi.org/10.1115/1.2842194
Published Online: August 1, 1996
View Article titled, Transient Pressure Analysis in Piping Networks due to Valve Closing and Outlet Pressure Pulsation
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Topics: Pipes, Pressure, Transients (Dynamics), Valves, Fluid pressure, Manifolds, Algorithms, Computer simulation, Design, Fast Fourier transforms
Journal Articles

Transient Flow Patterns and Pressures Characteristics in a Hydrostatic Pocket

M. J. Braun, Y. M. Zhou, F. K. Choy
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. January 1994, 116(1): 139–146.
https://doi.org/10.1115/1.2927030
Published Online: January 1, 1994
View Article titled, Transient Flow Patterns and Pressures Characteristics in a Hydrostatic Pocket
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Topics: Cavities, Errors, Finite difference methods, Flow (Dynamics), Geometry, Hydrostatics, Navier-Stokes equations, Reynolds number, Shear (Mechanics), Shear flow
Journal Articles

The Effects of a Hydrostatic Pocket Aspect Ratio, Supply Orifice Position, and Attack Angle on Steady-State Flow Patterns, Pressure, and Shear Characteristics

M. J. Braun, F. K. Choy, Y. M. Zhou
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. October 1993, 115(4): 678–685.
https://doi.org/10.1115/1.2921693
Published Online: October 1, 1993
View Article titled, The Effects of a Hydrostatic Pocket Aspect Ratio, Supply Orifice Position, and Attack Angle on Steady-State Flow Patterns, Pressure, and Shear Characteristics
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Topics: Flow (Dynamics), Hydrostatics, Pressure, Shear (Mechanics), Steady state, Computer simulation, Errors, Finite difference methods, Navier-Stokes equations
Journal Articles

Coupling of Rotor-Gear-Casing Vibrations During Extreme Operating Events

F. K. Choy, J. Padovan, Y. F. Ruan
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research Papers
J. Pressure Vessel Technol. November 1992, 114(4): 464–471.
https://doi.org/10.1115/1.2929256
Published Online: November 1, 1992
View Article titled, Coupling of Rotor-Gear-Casing Vibrations During Extreme Operating Events
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Topics: Gears, Rotors, Vibration, Bearings, Dynamics (Mechanics), Algorithms, Compressors, Earthquakes, Failure, Finite element model
Journal Articles

Modal Analysis of Multistage Gear Systems Coupled With Gearbox Vibrations

F. K. Choy, Y. F. Ruan, R. K. Tu, J. J. Zakrajsek, D. P. Townsend
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. September 1992, 114(3): 486–497.
https://doi.org/10.1115/1.2926577
Published Online: September 1, 1992
View Article titled, Modal Analysis of Multistage Gear Systems Coupled With Gearbox Vibrations
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Topics: Gears, Mechanical drives, Modal analysis, Vibration, Rotors, Bearings, Dynamics (Mechanics), Transients (Dynamics), Finite element model, Steady state
Journal Articles

Nonlinear Transient and Frequency Response Analysis of a Hydrodynamic Journal Bearing

F. K. Choy, M. J. Braun, Y. Hu
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. July 1992, 114(3): 448–454.
https://doi.org/10.1115/1.2920904
Published Online: July 1, 1992
View Article titled, Nonlinear Transient and Frequency Response Analysis of a Hydrodynamic Journal Bearing
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Topics: Frequency response, Journal bearings, Transients (Dynamics), Bearings, Engineering simulation, Fluid films, Simulation, Stiffness, Vibration
Journal Articles

Effects of Gear Box Vibration and Mass Imbalance on the Dynamics of Multistage Gear Transmission

F. K. Choy, Y. K. Tu, J. J. Zakrajsek, D. P. Townsend
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. July 1991, 113(3): 333–344.
https://doi.org/10.1115/1.2930190
Published Online: July 1, 1991
View Article titled, Effects of Gear Box Vibration and Mass Imbalance on the Dynamics of Multistage Gear Transmission
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Topics: Dynamics (Mechanics), Gears, Vibration, Bearings, Rotors, System dynamics, Degrees of freedom, Excitation, Excitation functions, Mode shapes
Journal Articles

Nonlinear Effects in a Plain Journal Bearing: Part 1—Analytical Study

F. K. Choy, M. J. Braun, Y. Hu
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. July 1991, 113(3): 555–561.
https://doi.org/10.1115/1.2920659
Published Online: July 1, 1991
View Article titled, Nonlinear Effects in a Plain Journal Bearing: Part 1—Analytical Study
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Topics: Journal bearings, Bearings, Pressure, Equilibrium (Physics), Fluid films, Lubricants, Stiffness, Stress, Approximation, Computer simulation
Journal Articles

Closure to “Discussion of ‘Nonlinear Effects in a Plain Journal Bearing: Part 1—Analytical Study’” (1991, ASME J. Tribol., 113, p. 561)

F. K. Choy, M. J. Braun, Y. Hu
Journal: Journal of Tribology
Publisher: ASME
Article Type: Discussions
J. Tribol. July 1991, 113(3): 562.
https://doi.org/10.1115/1.2926625
Published Online: July 1, 1991
View Article titled, Closure to “Discussion of ‘Nonlinear Effects in a Plain Journal Bearing: Part 1—Analytical Study’” (1991, ASME J. Tribol., 113, p. 561)
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Topics: Journal bearings
Journal Articles

Closure to “Discussion of ‘Nonlinear Effects in a Plain Journal Bearing: Part 2—Results’” (1991, ASME J. Tribol., 113, p. 570)

M. J. Braun, F. K. Choy, Y. Hu
Journal: Journal of Tribology
Publisher: ASME
Article Type: Discussions
J. Tribol. July 1991, 113(3): 570.
https://doi.org/10.1115/1.2926627
Published Online: July 1, 1991
View Article titled, Closure to “Discussion of ‘Nonlinear Effects in a Plain Journal Bearing: Part 2—Results’” (1991, ASME J. Tribol., 113, p. 570)
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Topics: Journal bearings
Journal Articles

Nonlinear Effects in a Plain Journal Bearing: Part 2—Results

M. J. Braun, F. K. Choy, Y. Hu
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. July 1991, 113(3): 563–570.
https://doi.org/10.1115/1.2920660
Published Online: July 1, 1991
View Article titled, Nonlinear Effects in a Plain Journal Bearing: Part 2—Results
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Topics: Journal bearings, Bearings, Computer simulation, Fluids, Lubricants, Pressure, Rotordynamics, Stress, Temperature