Active magnetic bearings (AMBs) have been proposed by many researchers and engineers as an alternative to replace traditional contact bearings in rotor and driveshaft systems. Such active, noncontact bearings do not have frictional wear and can be used to suppress vibration in sub- and supercritical rotor-dynamic applications. One important issue that has not yet been addressed by previous AMB-driveline control studies is the effect of driveline misalignment. Previous research has shown that misalignment causes periodic parametric and forcing actions, which greatly impact both driveline stability and vibration levels. Therefore, in order to ensure closed-loop stability and acceptable performance of any AMB controlled driveline subjected to misalignment, these effects must be accounted for in the control system design. In this paper, a hybrid proportional derivative (PD) feedback/multiharmonic adaptive vibration control (MHAVC) feedforward law is developed for an AMB/U-joint-driveline system, which is subjected to parallel-offset misalignments, imbalance, and load-torque operating conditions. Conceptually, the PD feedback ensures closed-loop stability while the MHAVC feedforward suppresses steady-state vibration. It is found that there is a range of P and D feedback gains that ensures both MHAVC convergence and closed-loop stability robustness with respect to shaft internal damping induced whirl and misalignment effects. Finally, it is analytically and experimentally demonstrated that the hybrid PD-MHAVC law effectively adapts to and suppresses multiharmonic vibration induced by imbalance, misalignment, and load-torque effects at multiple operating speeds without explicit knowledge of the disturbance conditions.
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e-mail: kwwang@psu.edu
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July 2008
Research Papers
Multiharmonic Adaptive Vibration Control of Misaligned Driveline via Active Magnetic Bearings
Hans A. DeSmidt,
Hans A. DeSmidt
Assistant Professor of Aerospace Engineering
MABE Department,
The University of Tennessee
, 606 Doughterty Hall, Knoxville, TN 37996-2210
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K. W. Wang,
e-mail: kwwang@psu.edu
K. W. Wang
William E. Diefenderfer Chaired Professor in Mechanical Engineering
The Pennsylvania State University
, 157 Hammond Building, University Park, PA 16802
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Edward C. Smith
Edward C. Smith
Professor of Aerospace Engineering
The Pennsylvania State University
, 157 Hammond Building, University Park, PA 16802
Search for other works by this author on:
Hans A. DeSmidt
Assistant Professor of Aerospace Engineering
MABE Department,
The University of Tennessee
, 606 Doughterty Hall, Knoxville, TN 37996-2210
K. W. Wang
William E. Diefenderfer Chaired Professor in Mechanical Engineering
The Pennsylvania State University
, 157 Hammond Building, University Park, PA 16802e-mail: kwwang@psu.edu
Edward C. Smith
Professor of Aerospace Engineering
The Pennsylvania State University
, 157 Hammond Building, University Park, PA 16802J. Dyn. Sys., Meas., Control. Jul 2008, 130(4): 041006 (13 pages)
Published Online: June 6, 2008
Article history
Received:
January 17, 2006
Revised:
August 19, 2007
Published:
June 6, 2008
Citation
DeSmidt, H. A., Wang, K. W., and Smith, E. C. (June 6, 2008). "Multiharmonic Adaptive Vibration Control of Misaligned Driveline via Active Magnetic Bearings." ASME. J. Dyn. Sys., Meas., Control. July 2008; 130(4): 041006. https://doi.org/10.1115/1.2907382
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