University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Robustness of System Equivalent Reduction Expansion Process on Spacecraft Structure Model Validation

Sairajan, KK and Aglietti, GS (2012) Robustness of System Equivalent Reduction Expansion Process on Spacecraft Structure Model Validation AIAA Journal: devoted to aerospace research and development, 50 (11). pp. 2376-2388.

[img]
Preview
Text
SAI_AIAA_paper_2012.pdf - ["content_typename_UNSPECIFIED" not defined]
Available under License : See the attached licence file.

Download (710kB) | Preview
[img]
Preview
PDF (licence)
SRI_deposit_agreement.pdf
Available under License : See the attached licence file.

Download (33kB) | Preview

Abstract

Test-analysis models are used in the validation of the nite element models of spacecraft structures. Here, a probabilistic approach is used to assess the robustness of a system equivalent reduction expansion process based testanalysis model when experimental and analytical modes contain different levels of inaccuracy. The approach is applied to three spacecraft models, and Monte Carlo simulations were used to determine the sensitivity of the normalized cross-orthogonality check to the system equivalent reduction expansion process reduced matrix. The effect of parameters used in this reduction and the amount of inaccuracies that can be tolerated in the modes before failing the normalized cross-orthogonality check were also determined. The results show that the probability to pass the normalized cross-orthogonality check is highly determined by the number of modes used in the reduction. The relation between capability of the nite element models to predict the frequency-response function and the quality of the model validation determined using normalized cross-orthogonality check is also investigated, and it is observed that the quantities are not always correlated. This study also shows that the sensor locations can be optimally chosen using the system equivalent reduction expansion process reduced mass matrix, and this can increase the probability to pass the normalized cross-orthogonality check.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Surrey Space Centre
Authors :
AuthorsEmailORCID
Sairajan, KKUNSPECIFIEDUNSPECIFIED
Aglietti, GSUNSPECIFIEDUNSPECIFIED
Date : November 2012
Identification Number : 10.2514/1.J051476
Additional Information : ©2012 American Institute of Aeronautics and Astronautics
Depositing User : Symplectic Elements
Date Deposited : 24 Jan 2014 10:25
Last Modified : 09 Jun 2014 13:53
URI: http://epubs.surrey.ac.uk/id/eprint/805001

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800