Comparative study on vibration control methodologies applied to adaptive anisotropic cantilevers

Liviu Librescu, Sungsoo Na, Soohyun Kim

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


A study of the vibrational control of adaptive doubly-tapered cantilevered beams, simulating an aircraft wing, exposed to time-dependent external pulses is presented. Whereas the beam structure encompasses non-classical properties such as transverse shear and anisotropy of their constituent materials, the active control capabilities are based upon the implementation of the adaptive materials technology. Herein, the adaptive feature is achieved through the converse piezoelectric effect that consists of the generation of localized strains in response to an applied voltage. Piezoactuators in the form of patches or spread all over the beam span are considered. The active control involves the dynamic response to arbitrary time-dependent external pulses. The closed-loop dynamic response time histories are obtained via the use of the piezoelectrically induced moment control, and through the implementation of a modified bang-bang control strategy that involves a maximum value constraint imposed on the input voltage. In addition to this active feedback control methodology, a passive one based upon the use of the directionality property of anisotropic composite material structures is also implemented. Moreover, the results are compared to those obtained via the implementation of two other feedback control methodologies, namely the LQR and the fuzzy logic control. Numerical simulations emphasing the performance of the adopted control strategies intended to contain and even reduce to zero the response quantities when time unfolds are presented, and pertinent conclusions are outlined.

Original languageEnglish
Pages (from-to)2667-2677
Number of pages11
JournalCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Publication statusPublished - 2002
Externally publishedYes
Event43rd Structures, Structural Dynamics and Materials Conference - Denver, CO, United States
Duration: 2002 Apr 222002 Apr 25

ASJC Scopus subject areas

  • Architecture
  • General Materials Science
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering


Dive into the research topics of 'Comparative study on vibration control methodologies applied to adaptive anisotropic cantilevers'. Together they form a unique fingerprint.

Cite this