This paper describes the experimental application of adaptive control to Hybrid Squeeze Film Damper (HSFD) supported rotors. The HSFD has been shown to be an adaptive damper capable of providing infinite damper configurations between short and long damper configurations. Previously, theoretical investigations of the adaptive control of HSFD concentrated on the development of the model reference adaptive control (MRAC) method, as well as development of a nonlinear reference model. Simulations of the performance of the adaptive controller during run-up and coast-down indicated the superior performance of the adaptive controller. In this paper, the adaptive controller is tested on a multi-mode rotor. A test rig is designed and developed using computer control. A simple reference model is investigated consisting of a second order system. Three forms for adaptation gain are studied. The results of the experimental investigation illustrated the performance capabilities of the adaptive controller applied to the HSFD, and moreover indicated the possibility of simple design for the adaptive controller. [S0742-4795(00)01603-3]

Issue Section:
Gas Turbines: Structures and Dynamics
Keywords:
rotors, gas turbines, adaptive control, vibration control, damping, performance evaluation
Topics:
Control equipment, Dampers, Rotors, Adaptive control, Design
1.
White, D. C., 1972, “The Dynamics of a Rigid Rotor Supported on Squeeze Film Bearings,” Conference on Vibrations in Rotating Machinery, Proc. I. Mech. E., pp. 213–229.
2.
Gunter
,
E. J.
,
Barrett
,
L. E.
, and
Allaire
,
P. E.
,
1977
, “
Design of Nonlinear Squeeze Film Dampers for Aircraft Engines
,”
ASME J. Lubr. Technol.
,
99
, No.
1
, pp.
57
–
64
.
3.
Holmes, R., and Dogan, M., 1985, “The Performance of a Sealed Squeeze Film Bearing in a Flexible Support Structure,” Proc. I. Mech. E., 199, No. 1.
4.
Burrows, C. R., Sahinkaya, M. N., and Turkay, O. S., 1983, “An Adaptive Squeeze-Film Bearing,” ASME Paper 83-Lub-23.
5.
Adams, M. L., and Zahloul, H., 1987, “Attenuation of Rotor Vibration Using Controlled-Pressure Hydrostatic Squeeze-Film Dampers,” presented at the Eleventh Biennial ASME Vibrations Conference, Boston, MA, September 1987.
6.
Mu
,
C.
,
Darling
,
J.
, and
Burrows
,
R.
,
1991
, “
An Appraisal of a Proposed Active Squeeze Film Damper
,”
ASME J. Tribol.
,
113
, No.
4
, pp.
750
–
754
.
7.
El-Shafei, A., 1991, “Hybrid Squeeze Film Damper for Active Control of Rotors,” U.S. Patent number 5.058.452.
8.
El-Shafei
,
A.
,
1993
, “
Experimental and Analytical Investigation of Hybrid Squeeze Film Dampers
,”
ASME J. Eng. Gas Turbines Power
,
115
, No.
2
, pp.
353
–
359
.
9.
El-Shafei
,
A.
, and
Hathout
,
J.-P.
,
1995
, “
Modelling and Control of HSFDs for Active Control of Rotor-Bearing Systems
,”
ASME J. Eng. Gas Turbines Power
,
117
, No.
4
, pp.
757
–
766
.
10.
Hathout, J. P., and El-Shafei, A., 1996, “Adaptive Control of Rotor-Bearing Systems Using Hybrid Squeeze Film Dampers,” Proceedings of Sixth Int. Conf. On Vibration in Rotating Machinery, Oxford, England, I. Mech. E., pp. 671–690.
11.
Hathout
,
J.-P.
, and
El-Shafei
,
A.
,
1997
, “
PI Control of HSFDs for Active Control of Rotor-Bearing Systems
,”
ASME J. Eng. Gas Turbines Power
,
119
, No.
3
, pp.
658
–
667
.
12.
Hathout
,
J.-P.
,
El-Shafei
,
A.
, and
Youssef
,
R.
,
1997
, “
Active Control of Multi-Mode Rotor-Bearing Systems Using HSFDs
,”
ASME J. Tribol.
,
119
, No.
1
, pp.
49
–
56
.
13.
El-Shafei, A., and El-Hakim, M., 1995, “Development of a Test Rig and Experimental Verification of the Performance of HSFDs for Active Control of Rotors,” ASME Paper 95-GT-256.
14.
El-Shafei, A., El-Hakim, M., and Hathout, J.-P., 1993, “Control of Rotor Vibrations Using Hybrid Squeeze Film Dampers,” Report MDP-EOARD-2/94, Cairo University.
15.
El-Shafei
,
A.
,
1990
, “
Unbalance Response of a Jeffcott Rotor Incorporating Short Squeeze Film Dampers
,”
ASME J. Eng. Gas Turbines Power
,
112
, No.
4
, pp.
445
–
453
.
16.
El-Shafei, A., Massoud, A. T., El-Hakim, M., Hathout, J.-P., Youssef, R., 1997, “Control of Rotor Vibrations Using Hybrid Squeeze Film Dampers,” Report MDP-EOARD-1/97, Cairo University.
17.
Astrom, K. J., and Wittenmark, B., 1989, Adaptive Control, Addison-Wesley, Reading, MA.
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