ON THE IDENTIFICATION OF SELF-ADJOINT DISTRIBUTED SYSTEMS USING MODAL FILTERS.

H. Baruh, L. M. Silverberg

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

A method is presented for the identification of external excitations acting on distributed-parameter systems and, for certain cases, the parameters contained in the equations of motion of the distributed system. By extracting the modal coordinates from the system output, and using these modal coordinates to identify the modal excitations acting on a number of modes, the actual external disturbances are synthesized. The modal coordinates are extracted from the system output by interpolation of the sensors measurements and use of the expansion theorem, a process known as modal filtering. It is shown that the accuracy of the identification improves as the number of sensors is increased. The effects of factors such as measurement noise and interpolation error are analyzed.

Original languageEnglish (US)
Pages (from-to)673-681
Number of pages9
JournalCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Issue numberpt 2
DOIs
StatePublished - 1985

All Science Journal Classification (ASJC) codes

  • Architecture
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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