In this paper, the rotating flexible-Timoshenko-shaft/flexible-disk coupling system is formulated by applying the assumed-mode method into the kinetic and strain energies, and the virtual work done by the eddy-current damper. From Lagrange’s equations, the resulting discretized equations of motion can be simplified as a bilinear system (BLS). Introducing the control laws, including the quadratic, nonlinear and optimal feedback control laws, into the BLS, it is found that the eddy-current damper can be used to suppress flexible and shear vibrations simultaneously, and the system is globally asymptotically stable. Numerical results are provided to validate the theoretical analysis.
Issue Section:
Technical Papers
1.
Fung
, R. F.
, and Hsu
, S. M.
, 2000
, “Dynamic Formulations and Energy Analysis of Rotating Flexible-Shaft/Multi-Flexible-Disk System with Eddy-Current Brake
,” ASME J. Vibr. Acoust.
, 22
, pp. 365
–375
.2.
Nagaya
, K.
, Kojima
, H.
, Karube
, Y.
, and Kibayashi
, H.
, 1984
, “Braking Forces and Damping Coefficients of Eddy Current Brakes Consisting of Cylindrical Magnets and Plate Conductors of Arbitrary Shape
,” IEEE Trans. Magn.
, 20
(6
), pp. 2136
–2145
.3.
Kligerman
, Y.
, and Gottlieb
, O.
, 1998
, “Dynamics of a Rotating System with a Nonlinear Eddy-Current Damper
,” ASME J. Vibr. Acoust.
, 120
, pp. 848
–853
.4.
Mohler, R. R., 1991, Nonlinear Systems: Volume II, Applications to Bilinear Control, Prentice Hall.
5.
Derese
, I.
, and Noldus
, E.
, 1980
, “Design of Linear Feedback Laws for Bilinear Systems
,” Int. J. Control
, 31
, pp. 219
–237
.6.
Gutman
, P. O.
, 1981
, “Stabilizing Controllers for Bilinear Systems
,” IEEE Trans. Autom. Control
, 26
(4
), pp. 917
–922
.7.
Jacobsen, D. H., 1979, Extensions of Linear-Quadratic Control, Optimization and Matrix Theory, Academic press.
8.
Cebuhar
, W. A.
, and Costanza
, V.
, 1984
, “Approximation Procedures for the Optimal Control of Bilinear and Nonlinear Systems
,” J. Optim. Theory Appl.
, 43
(4
), pp. 615
–627
.9.
Benallou
, D.
, Mellichamp
, D. A.
, and Seborg
, D. E.
, 1988
, “Optimal Stabilizing Controllers for Bilinear Systems
,” Int. J. Control
, 48
(4
), pp. 1487
–1501
.10.
Chen
, M. S.
, 1998
, “Exponential Stabilization of a Constrained Bilinear System
,” Automatica
, 34
(8
), pp. 989
–992
.11.
Lewis, F. L., and Syrmos, V. L., 1995, Optimal Control, Wiley, New York.
12.
Bryson, A. E, Jr., and Ho, Y. C., 1975, Applied Optimal Control, Wiley, New York.
13.
Jia
, H. S.
, 1999
, “On the Bending Coupled Natural Frequencies of a Spinning, Multispan Timoshenko Shaft Carrying Elastic Disks
,” J. Sound Vib.
, 221
(4
), pp. 623
–649
.Copyright © 2002
by ASME
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