Active vibration control of doubly tapered thin-walled beams using piezoelectric actuation

Liviu Librescu, Sungsoo Na

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)


This paper deals with a study of the modeling and open/closed-loop vibrational behavior of cantilevered beams of non-uniform cross-sections featuring non-classical properties such as transverse shear, anisotropy and heterogeneity of their constituent materials. The active feedback control capability is based upon the implementation of adaptive materials, consisting of piezoelectric layers that are bonded or embedded into the host structure and fully distributed along the entire beam span. As a result of the converse piezoelectric effect considered in conjunction with the out-of-phase activation, a boundary moment is induced at the beam tip. A combined dynamic feedback control law relating the piezoelectrically induced boundary bending moment to the various kinematical response quantities is implemented, and its effects upon the closed-loop eigenfrequencies are investigated. The results obtained reveal the high efficiency of the control methodology adopted towards enhancement of the vibrational behavior of these structures, and emphasize, in this context, the implications of the non-uniformity of the beam cross-sections considered in conjunction with other non-classical effects.

Original languageEnglish
Pages (from-to)65-82
Number of pages18
JournalThin-Walled Structures
Issue number1
Publication statusPublished - 2001 Jan
Externally publishedYes

Bibliographical note

Funding Information:
The paper has been funded in part by the National Research Council under the Collaboration in Basic Science and Engineering Program. The contents of this publication do not necessarily reflect the views or policies of the NRC.

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering


Dive into the research topics of 'Active vibration control of doubly tapered thin-walled beams using piezoelectric actuation'. Together they form a unique fingerprint.

Cite this