1.2.3.4.5.6.7.

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Vibration Suppression In Rotating Beams Using Active Modal

Control

Khulief, YA

ACADEMIC PRESS LTD, JOURNAL OF SOUND AND VIBRATION; pp: 681-699; Vol: 242

King Fahd University of Petroleum & Minerals

http://www.kfupm.edu.sa

Summary

Advances in technology and the underlying demand for achieving high performance

has resulted in a class of light-weight high-speed mechanical systems. Light-weight

mechanical components are prone to appreciable elastic deformations and experience

vibrational motions. Vibration suppression in rotating elastic members is of major

importance in many engineering applications. Examples are robot manipulators,

propellers, turbomachines, high-speed flexible mechanisms, and space deployable

systems. Active control falls among the most feasible techniques for vibration

suppression in rotating structures, where passive techniques may become ineffective

or impractical. The vibrational motion of the rotating elastic member is represented by

a finite element dynamic model, which is written in terms of a reduced set of modal

co-ordinates. A realistic set of modal co-ordinates that accounts for the dynamically

induced stiffening effect due to reference rotation is introduced. Pointwise

observation and control art: employed in association with an optimal state-variable

feedback strategy. The control scheme developed is applied to a rotating beam, and

the dynamic responses of both the controlled and residual frequency subsystems are

numerically evaluated. (C) 2001 Academic Press.

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Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa

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