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Accession Number ADA564639
Title On-Orbit Assessment of Satellite Structural Properties via Robust Structural Health Monitoring.
Publication Date Jul 2012
Media Count 64p
Personal Author A. Chattopadhyay A. Vizzini Y. Liu
Abstract This project addressed the development of an integrated Structural Health Monitoring (SHM) system for damage diagnosis, including detection and localization in complex composite structures. Lamb wave based active sensing for damage diagnosis is investigated first. The propagation of Lamb wave in stiffened carbon fiber polymer matrix composite panels is characterized. A two step damage detection and characterization approach, which uses both pulse-echo and pitch-catch active sensing schemes, is presented for the identification of delaminations in the stiffened composite panels. The Matching Pursuit Decomposition (MPD) algorithm is used for the representation of the sensor signals in the time-frequency domain. The delaminations are detected by identifying the converted Lamb wave modes in the time-frequency domain. The MPD algorithm is further used to assess the delamination location in composite structures. Due to the redundancy of the PZT sensor array, a probabilistic location estimation algorithm is used to estimate the confidence range of the delamination in the composite structures.
Keywords Algorithms
Composite structures
Confidence level
Conversion
Damage
Damage diagnosis
Decomposition
Detection
Diagnosis(Medicine)
Echoes
Health
Identification
Integrated systems
Lamb wave
Mpd(Matching pursuit decomposition)
Orbits
Probability
Pulses
Pursuit courses
Shm(Structural health monitoring)
Stiffening
Structural properties

 
Source Agency Non Paid ADAS
NTIS Subject Category 57E - Clinical Medicine
57W - Stress Physiology
Corporate Author Arizona State Univ., Tempe.
Document Type Technical report
Title Note Final rept. 3 Feb 2009-11 May 2012.
NTIS Issue Number 1303
Contract Number FA9453-09-1-0316

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