NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
A second-order structural identification procedure via state space-based system identificationA theory is presented for transforming the system theory-based realization models into the corresponding physical coordinate-based structural models. The theory has been implemented into a computational procedure and applied to several example problems. The results show that the present transformation theory yields an objective model basis possessing a unique set of structural parameters from an infinite set of equivalent system realization models. For proportionally damped systems, the transformation directly and systematically yields the normal modes and modal damping. When non-proportional damping is present, the relative magnitude and phase of the damped model shapes are separately characterized, and a corrective transformation is then employed to capture the undamped normal modes and non-diagonal modal damping matrix.
Document ID
19920072685
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Alvin, K. F.
(NASA Langley Research Center Hampton, VA, United States)
Park, K. C.
(Colorado, University Boulder, United States)
Belvin, W. K.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Subject Category
Cybernetics
Report/Patent Number
AIAA PAPER 92-4387
Meeting Information
Meeting: AIAA Guidance, Navigation and Control Conference
Location: Hilton Head Island, SC
Country: United States
Start Date: August 10, 1992
End Date: August 12, 1992
Accession Number
92A55309
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available