A study is presented in which the vibrations of a rotor are controlled under both synchronous and transient conditions. A Fourier decomposition of the rotor vibration during successive synchronous cycles is performed and the fundamental amplitude component is monitored. An analysis of the component response is developed and a strategy is proposed for the rotor vibration control. This is based around a gain matrix derived for a steady-state open-loop controller and the loop is then closed in a form of generalized integral control using a single feedback parameter. Performance and stability characteristics are investigated and for a linear system it is shown that the control of transient vibration caused by sudden mass loss from a rotor is possible. Limitations are stated if the system becomes nonlinear. Multiprocessor hardware is used for on-line implementation of the controller algorithm to an experimental rig, consisting of a rotor supported by two journal bearings with a magnetic control actuator. The results show the effectiveness of the vibration control, which is evaluated over the stable operating range of the controller.

Issue Section:
Technical Papers
Topics:
Control equipment, Rotor vibration, Transients (Dynamics), Rotors, Vibration, Actuators, Algorithms, Cycles, Feedback, Hardware, Journal bearings, Linear systems, Stability, Steady state, Vibration control
1.
Bleuler, H., and Schweitzer, G., 1983, “Dynamics of a Magnetically Suspended Rotor with Decentralized Control,” IASTED Applied Dynamics and Control Symposium, Copenhagen.
2.
Burrows
C. R.
,
Keogh
P. S.
, and
Tasaltin
R.
,
1993
, “
Closed-Loop Vibration Control of Flexible Rotor-An Experimental Study
,”
Proceeding, Institution of Mechanical Engineers, Part C
, Vol.
207
, pp.
1
–
17
.
3.
Burrows
C. R.
, and
Sahinkaya
M. N.
,
1983
, “
Vibration Control of Multi-Mode Rotor Bearing Systems
,”
Proceedings of the Royal Society of London
, Vol.
A386
, pp.
77
–
94
.
4.
Herzog, R., and Bleuler, H., 1992, “On Achievable H∞ Disturbance Attenuation in AMB Control,” Proceedings, 3rd Int. Symp. on Magnetic Bearings, Washington D.C.
5.
Mu, C., Keogh, P. S., and Burrows, C. R., 1992, “H-Infinity Controller Design for active vibration control of a flexible rotor,” Proceedings, 5th Int. Conf. on Vibrations in Rotating Machinery, Bath, pp. 131–140.
6.
Palazzolo
A. B.
,
Lin
R. R.
,
Kasak
A. K.
,
Montague
J.
, and
Alexander
R. M.
,
1988
, “
Piezoelectric Pushers for Active Vibration Control of Rotating Machinery
,”
ASME Journal of Vibrations, Acoustics. Stress. Reliability in Design
, Vol.
111
, pp.
298
–
305
.
7.
Palazzolo
A. B.
,
Lin
R. R.
,
Alexander
R. M.
,
Kasak
A. K.
, and
Montague
J.
,
1991
, “
Test and Theory for Piezoelectric Actuator-Active Vibration Control of Rotating Machinery
,”
ASME Journal of Vibrations and Acoustics
, Vol.
113
, pp.
167
–
175
.
8.
Palazzolo
A. B.
,
Jagannathan
S.
,
Kasak
A. K.
,
Montague
J.
, and
Kiraly
L. J.
,
1993
, “
Hybrid Active Vibration Control of Rotorbearing Systems Using Piezoelectric Actuators
,”
ASME Journal of Vibrations and Acoustics
, Vol.
115
, pp.
111
–
119
.
9.
Salm, J., and Schweitzer, G., 1984, “Modelling and Control of a Flexible Rotor with Magnetic Bearings,” Proceedings. 3rd Institution of Mechanical Engineers International Conference on Vibrations in Rotating Machinery, York, pp. 553–561.
10.
Schweitzer, G., 1975, “Stabilization of Self Excited Rotor Vibrations by an Active Damper,” Dynamics of Rotors, F. I. Niordson, ed., Berlin, Springer-Verlag, pp. 472–493.
11.
Schweitzer, G., and Lange, R., 1976, “Characteristics of a Magnetic Rotor Bearing for Active Vibration Control,” Proceedings, 1st Institution of Mechanical Engineers International Conference on Vibrations in Rotating Machinery, Cambridge, pp. 301–306.
12.
Stanway, R., and Burrows, C. R., 1981, “Stabilization of a Flexible Rotor by Eigenvalue Assignment,” Institution of Electrical Engineers Conference on Control and its Application, pp. 102–105.
13.
Ulbrich, H., and Althaus, J., 1989, “Actuator Design for Rotor Control,” 12th Biennial ASME Conference on Mechanical Vibrations and Noise, Montreal, Canada.
14.
Viggiano, F., and Schweitzer, G. 1992, “Blade Loss Dynamics of a Magnetically Suspended Rotor,” 3rd International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Hawaii, pp. 53–68.
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