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Proceedings Paper

Dynamic modeling and control of slewing smart beam
Author(s): Moon K. Kwak
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Paper Abstract

This research is concerned with the modeling and active vibration control of slewing smart structures. When cantilever beam rotates about axes perpendicular to the undeformed beam's longitudinal axis, it experiences inertial loading. Hence, the beam vibrates during and after slewing. In this paper, the analytical model for a single slewing flexible beam with surface bonded piezoelectric sensor and actuator is first developed using the Hamilton's principle with discretization by the assumed mode method. The theoretical frequency response function is then compared to the experimental open loop frequency response data. It is found from the comparison that the rotor friction should be included in the modeling. A new concept is introduced to incorporate the effect of the friction. As a result, the use of coupling factor is proposed in this paper. The positive position feedback, (PPF) controller is designed for the suppression of residual vibrations after slewing. The experimental results show that it can suppress the vibration effectively but cannot alleviate the vibrations occurred during slewing. This problem is discussed in detail in this paper.

Paper Details

Date Published: 16 August 2001
PDF: 11 pages
Proc. SPIE 4327, Smart Structures and Materials 2001: Smart Structures and Integrated Systems, (16 August 2001); doi: 10.1117/12.436557
Show Author Affiliations
Moon K. Kwak, Dongguk Univ. (South Korea)

Published in SPIE Proceedings Vol. 4327:
Smart Structures and Materials 2001: Smart Structures and Integrated Systems
L. Porter Davis, Editor(s)

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