Control of Flexible Structures With the Confinement of Vibrations

[+] Author and Article Information
Slim Choura

Department of Mechanical Engineering, King Saud University, PO Box 800, Riyadh 11421 Saudi Arabia

J. Dyn. Sys., Meas., Control 117(2), 155-164 (Jun 01, 1995) (10 pages) doi:10.1115/1.2835175 History: Received January 01, 1993; Online January 22, 2008


A novel control strategy for the simultaneous suppression and confinement of vibrations in flexible structures is proposed. The key idea is to alter the original modes by appropriate feedback forces to allow parts of a flexible structure to reach their steady states at fast rates. It has been demonstrated that the convergence of these parts to zero is improved at the expense of slowing down the settling of the remaining parts to their steady states. The proposed control strategy can be applied in the rapid removal of vibration energy in sensitive parts of a flexible structure for safety or performance reasons. Such parts include communication antennas in light space structures and payloads of flexible robot manipulators. In order to gain insight into the viability of the proposed control strategy, the latter is compared with a classical feedback control strategy under the same input bound constraint. It has been shown that the new control strategy brings the sensitive parts to rest with approximately 50 percent reduction in time.

Copyright © 1995 by The American Society of Mechanical Engineers
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