Electronics speckle interferometry applications for NDE of spacecraft structural components

M. V. Rao; R. Samuel; A. Ananthan; S. Dasgupta; P. S. Nair

doi:10.1117/12.814580

3 October 2008 Electronics speckle interferometry applications for NDE of spacecraft structural components

M. V. Rao, R. Samuel, A. Ananthan, S. Dasgupta, P. S. Nair

Proceedings Volume 7155, Ninth International Symposium on Laser Metrology; 715526 (2008) https://doi.org/10.1117/12.814580
Event: Ninth International Symposium on Laser Metrology, 2008, Singapore, Singapore

Abstract

The spacecraft components viz., central cylinder, deck plates, solar panel substrates, antenna reflectors are made of aluminium/composite honeycomb sandwich construction. Detection of these defects spacecraft structural components is important to assess the integrity of the spacecraft structure. Electronic Speckle Interferometry (ESI) techniques identify the defects as anomalous regions in the interferometric fringe patterns of the specklegram while the component is suitably stressed to give rise to differential displacement/strain around the defective region. Calibration studies, different phase shifting methods associated with ESI and the development of a prototype Twin Head ESSI System (THESSIS) and its use for the NDE of a typical satellite structural component are presented.

Citation Download Citation

M. V. Rao, R. Samuel, A. Ananthan, S. Dasgupta, and P. S. Nair "Electronics speckle interferometry applications for NDE of spacecraft structural components", Proc. SPIE 7155, Ninth International Symposium on Laser Metrology, 715526 (3 October 2008); https://doi.org/10.1117/12.814580

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