Dynamic response control of cantilevers to time-dependent external excitations using optimal feedback control and smart materials technology

Sungsoo Na, Liviu Librescu

Research output: Contribution to journalConference article


The problem of controlling the dynamic response of cantilevers exposed to blast loading is addressed. The structure to be controlled consists of a thin-walled beam of a closed cross-section contour which encompasses a number of non-classical features such as transverse shear, primary and secondary warping and anisotropy of the constitutent materials. The control is achieved via the use of the directionality property featured by advanced composite materials and of the actuating capabilities provided by piezoelectric devices which are bonded or embedded into the host structure. The cases of the 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 the patch location upon the control efficiency are discussed. Other issues related with the minimization of the input power required, and implications of the limitation of control input voltage are also addressed.

Original languageEnglish
Pages (from-to)625-636
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1998 Dec 1
Externally publishedYes
EventSmart Structures and Materials 1998 Mathematics and Control in Smart Structures - San Diego, CA, United States
Duration: 1998 May 21998 May 5


  • Dynamic response
  • Optimal control
  • Piezoactuators
  • Piezopatch
  • Structural tailoring

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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