Accession Number : ADA325287

Title :   LQR Control of Shell Vibrations Via Piezoceramic Actuators.

Descriptive Note : Contractor rept.,

Corporate Author : INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA

Personal Author(s) : Del Rosario, R. C. ; Smith, R. C.

PDF Url : ADA325287

Report Date : MAR 1997

Pagination or Media Count : 21

Abstract : A model-based LQR method for controlling vibrations in cylindrical shells is presented. Surface mounted piezoceramic patches are employed as actuators which leads to unbounded control input operators. Modified Donnell-Mushtari shell equations incorporating strong or Kelvin-Voigt damping are used to model the system. The model is then abstractly formulated in terms of sesquilinear forms. This provides a framework amenable for proving model well posedness and convergence of LQR gains using analytic semigroup results combined with LQR theory for unbounded input operators. Finally, numerical examples demonstrating the effectiveness of the method are presented.

Descriptors :   *MATHEMATICAL MODELS, *SHELLS(STRUCTURAL FORMS), *CERAMIC MATERIALS, *PIEZOELECTRIC MATERIALS, *ACTUATORS, *NOISE REDUCTION, VIBRATION, DAMPING, PIPES, CYLINDRICAL BODIES, FEEDBACK.

Subject Categories : Ceramics, Refractories and Glass
      Electricity and Magnetism
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE