Optimal Vibration Control of Thin-Walled Anisotropic Cantilevers Exposed to Blast Loadings

Sungsoo Na, Liviu Librescu

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


A study of optimal feedback control of the dynamic response of cantilevers exposed to blast loadings is presented. The structure to be controlled consists of a thin-walled beam of closed cross section contour that encompasses a number of nonclassical features such as transverse shear, primary and secondary warping, and anisotropy of the constitutent material. The control is achieved via the use of actuating and sensing capabilities provided by piezoelectric devices that are bonded or embedded into the host structure. In addition, the directionality property of advanced fiber-reinforced composite materials is also used to tailor the host structure to obtain an enhanced dynamic response. The cases of piezoactuators spread over the entire span of the structure or in the form of a patch are considered, and issues related with the influence of patch location and size on the control efficiency are discussed. Other issues related to the minimization of the required input power and implications of the limitation of control input voltage and of those generated by the inclusion/discard in the quadratic performance index of time-dependent external excitations are also addressed.

Original languageEnglish
Pages (from-to)491-500
Number of pages10
JournalJournal of Guidance, Control, and Dynamics
Issue number3
Publication statusPublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Aerospace Engineering
  • Space and Planetary Science
  • Electrical and Electronic Engineering
  • Applied Mathematics


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