The Modeling and Control of Acoustic/Structure Interaction Problems via Piezoceramic Actuators: 2-D Numerical Examples

Abstract

The modeling and active control of acoustic pressure in a 2-D cavity with a flexible boundary (a beam) is considered. Control is implemented in the model via piezoceramic patches on the beam which are excited in a manner so as to produce pure bending moments. The incorporation of the feedback control in this manner leads to a system with an unbounded input term. Approximation techniques are discussed and by writing the resulting system as an abstract Cauchy equation, the problem of reducing interior pressure fluctuations can be posed in the context of an LQR time domain state space formulation. Examples illustrating the dynamic behavior of the coupled system as well as demonstrating the viability of the control method on a variety of problems with periodic forcing functions are presented.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1992
Accession Number
ADA251857

Entities

People

  • H. Thomas Banks
  • R. C. Smith
  • R. J. Silcox

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Acoustic Waves
  • Acoustics
  • Actuators
  • Aircrafts
  • Bending Moments
  • Boundaries
  • Control Systems
  • Couplings
  • Differential Equations
  • Engineering
  • Equations
  • Resonant Frequency
  • Riccati Equation
  • Sound Pressure
  • Time Domain
  • Two Dimensional

Readers

  • Control Systems Engineering.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers