Active vibration control requires a velocity signal which is fed back to the force actuator to produce the damping force to the structure. Usually a gap sensor is used to detect the displacement and a differentiator is needed to produce the velocity signal. Moreover, it is very difficult to install the sensor at the same position of the actuator. Setting the gap sensor close to the magnetic actuator may cause an undesirable interaction between them. Sometimes there is no space for installing the sensor. This paper introduces a method of using a moving-coil-type actuator as a two-port sensing and driving device. Four types of velocity identification algorithms are tested and their capability of reducing structural vibrations is compared.
Issue Section:
Research Papers
Topics:
Actuators,
Vibration control,
Sensors,
Signals,
Algorithms,
Damping,
Displacement,
Vibration
1.
Balas, G. J., and Doyle, J. C., 1990, “Collocated Versus Non-collocated Multivariable Control for Flexible Structure,” Proc. of American Control Conference, TP12, pp. 1923.
2.
Kalman
R. E.
Bucy
R. S.
1961
, “New Results in Linear Filtering and Prediction Problems
,” ASME Journal of Basic Engineering, Ser. D.
, Vol. 38
, No. 1
, pp. 95
–108
.3.
Lindner
D. K.
Celano
T. P.
Ide
E. N.
1991
, “Vibration Suspension Using a Proofmass Actuator Operating in Stroke/Force Saturation
,” ASME JOURNAL OF VIBRATION AND ACOUSTICS
, Vol. 113
, October, pp. 423
–433
.4.
Luenberger, D. G., 1966, “An Introduction to Observers,” IEEE Trans. AC-16, pp. 596–602.
5.
Mizuno, T., Bleuler, H., Gahler, C., and Visher, D., 1992, “Towards Practical Applications of Self-Sensing Magnetic Bearings,” Proc. of the 3rd Int. Symp. on Magnetic Bearings, Alexandria, VA, July 29-31.
6.
Okada
Y.
Nakada
T.
1976
, “Analysis and Experiments on an Electro-Hydraulic Torsional Servo Vibration Damper
,” Bull, of the JSME
, Vol. 19
, No. 131
, May, pp. 477
–484
.7.
Okada, Y., 1978, “Analysis and Application of the Electro-Magnetic Servo Damper,” Proc. of the 19th Int. Machine Tool Design and Research Conf., Manchester, Sept. 13–15, pp. 481–486.
8.
Okada, Y., Matsuda, K., and Nagai, B., 1992, “Sensorless Magnetic Levitation Control by Measuring the PWM Carrier Frequency Component,” Proc. of the 3rd Int. Symp. on Magnetic Bearings, Alexandria, VA, July 29–31.
9.
Visher, D., and Bleuler, H., 1990, “A New Approach to Sensorless and Voltage Controlled AMB’s Based on Network Approach,” Proc. of 2nd Int. Symp. on Magnetic Bearings, July 12–14, Tokyo, pp. 301.
10.
Zimmerman
D. C.
Horner
G. C.
Inman
D. J.
1988
, “Microprocessor Controlled Force Actuator
,” Journal of Guidance and Control
, Vol. 11
, No. 3
, pp. 230
–236
.
This content is only available via PDF.
Copyright © 1995
by The American Society of Mechanical Engineers
You do not currently have access to this content.
