Statistical analysis of modeling error in structural dynamic systemsThe paper presents a generic statistical model of the (total) modeling error for conventional space structures in their launch configuration. Modeling error is defined as the difference between analytical prediction and experimental measurement. It is represented by the differences between predicted and measured real eigenvalues and eigenvectors. Comparisons are made between pre-test and post-test models. Total modeling error is then subdivided into measurement error, experimental error and 'pure' modeling error, and comparisons made between measurement error and total modeling error. The generic statistical model presented in this paper is based on the first four global (primary structure) modes of four different structures belonging to the generic category of Conventional Space Structures (specifically excluding large truss-type space structures). As such, it may be used to evaluate the uncertainty of predicted mode shapes and frequencies, sinusoidal response, or the transient response of other structures belonging to the same generic category.
Document ID
19900042359
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hasselman, T. K. (Engineering Mechanics Association, Inc. Torrance, CA, United States)
Chrostowski, J. D. (Engineering Mechanics Associates, Inc. Torrance, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
AIAA PAPER 90-1041
Meeting Information
Meeting: AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference