TITLE

Active vibration control of a space truss using a lead zirconate titanate stack actuator

AUTHOR(S)
Song, G; Vlattas, J; Johnson, S E; Agrawal, B N
PUB. DATE
December 2001
SOURCE
Proceedings of the Institution of Mechanical Engineers -- Part G;2001, Vol. 215 Issue 6, p355
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This paper presents design, implementation and experimental results of active vibration control of Naval Postgraduate School (NPS) space truss using a piezoelectric ceramic stack actuator. The NPS space truss represents a flexible spacecraft structure that may support interferometer, antenna and other vibration-sensitive instrumentation. To simulate the effects of a spacecraft disturbance on the truss, a proof mass actuator is incorporated on the structure to excite the truss. To reduce the vibrations caused by the proof mass actuator, an active strut member is installed along a diagonal of the base bay of the truss. The active strut element consists of a piezoelectric ceramic actuator stack, a force transducer and mechanical interfaces. An integral plus double-integral force controller is designed to suppress vibration of the truss. Experimental results demonstrate that the active piezoceramic strut actuator can effectively reduce truss vibration.
ACCESSION #
6736346

 

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