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Proof-of-Concept Experimental Validation of a New Active Hydrodynamic Bearing

[+] Author Affiliations
N. Rivenbark, C. Walsh, M. de Queiroz

Louisiana State University, Baton Rouge, LA

Paper No. DSCC2015-9675, pp. V002T36A003; 9 pages
doi:10.1115/DSCC2015-9675
From:
  • ASME 2015 Dynamic Systems and Control Conference
  • Volume 2: Diagnostics and Detection; Drilling; Dynamics and Control of Wind Energy Systems; Energy Harvesting; Estimation and Identification; Flexible and Smart Structure Control; Fuels Cells/Energy Storage; Human Robot Interaction; HVAC Building Energy Management; Industrial Applications; Intelligent Transportation Systems; Manufacturing; Mechatronics; Modelling and Validation; Motion and Vibration Control Applications
  • Columbus, Ohio, USA, October 28–30, 2015
  • Conference Sponsors: Dynamic Systems and Control Division
  • ISBN: 978-0-7918-5725-0
  • Copyright © 2015 by ASME

abstract

Flow-induced instabilities known as ‘whirl’ and ‘whip’ are the main contributors to self-excited vibrations in fluid-film bearings. In this paper, we experimentally evaluate a new active hydrodynamic bearing designed to lessen flow-induced vibrations in rotating machines. The active system consists of a fluid-film bearing with a motor-actuated rotating bushing that serves as the control input. This input is used to adjust the mean flow velocity in the bearing and indirectly control the whirl vibration. A PID-type control law is used to adjust the bushing speed. An experimental test rig that realizes the active bearing concept is introduced. Experimental results are presented comparing the active bearing with PID-type control and open-loop control to the passive bearing operation. The results show that the active bearing with feedback control is effective in eliminating whirl vibrations.

Copyright © 2015 by ASME
Topics: Bearings

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