Active Control of Flexural Vibrations in Beams

by Carl H. Gerhold, Texas A&M Univ, United States,
Rodney Rocha, Texas A&M Univ, United States,



Document Type: Proceeding Paper

Part of: Engineering, Construction, and Operations in Space

Abstract:

The feasibility of using piezoelectric actuators to control the flexural oscillations of large structures in space is investigated. Flexural oscillations are excited by implusive loads such as Shuttle docking. The vibratory response can degrade the pointing accuracy of cameras and antennae, and can cause high stresses at structural node points. Piezoelectric actuators have the advantage of exerting localized bending moments. In this way, vibration is controlled without exciting rigid body modes in the structure.

Subject Headings: Vibration | Structural control | Space frames | Control systems | Space structures | Oscillations | Flexural strength

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