Modal representations in control/structure interactionWhen control/structure interaction problems are examined, a standard method for representing the structure is to choose a truncated set of normal modes calculated from either a finite-element or a distributed-parameter model. However, the normal modes can neglect important static information about the structure. Using a set of fixed interface modes results in a much more accurate closed-loop model, even when relatively low-bandwidth controllers are used. The fixed interface modes are calculated with control input degrees of freedom held fixed, and standard finite-element software can be used. Illustrative examples include a simple hinged beam and a complex model of the phase-I Space Station configuration.
Document ID
19890066743
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Blelloch, Paul A. (SDRC, Inc. San Diego, CA, United States)
Young, Jeffrey W. (SDRC, Inc. Engineering Services Div., San Diego, CA, United States)
Carney, Kelly S. (NASA Lewis Research Center Cleveland, OH, United States)