Model-Augmented Pattern Recognition for Damage Detection in Aerospace Materials

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-08-C-3860
Agency Tracking Number: F061-097-3762
Amount: $749,959.00
Phase: Phase II
Program: SBIR
Awards Year: 2009
Solicitation Year: 2006
Solicitation Topic Code: AF06-097
Solicitation Number: 2006.1
Small Business Information
222 Third Street, Suite 3121, Cambridge, MA, 02142
DUNS: 111487588
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Seth S Kessler
 (617) 661-5616
Business Contact
 Seth Kessler
Title: President
Phone: (617) 661-5616
Research Institution
Currently successful laboratory non-destructive methods are impractical for inspection of integrated aerospace structures. To resolve this issue, the Metis Design Corporation (MDC) has developed structural health monitoring (SHM) system sensors and hardware. SHM is an emerging technology leading to the development of systems capable of continuously monitoring damage with minimal human intervention. During Phase I research MDC used piezoelectric actuator/sensor pairs to perform Lamb wave testing on composite plates with drilled holes, delamination and impact damage. Subsequently pattern recognition methods were used to classify the presence, type and severity of damage. This method proved very successful, demonstrating 100% accuracy in determining damage presence and type, and 99.9% for rough damage severity across 9000 tests. Phase II research leverages these results to scale this methodology to real built-up structures. MDC will work in parallel with Boeing on the AFRL/VA funded “Hot Spots” program, focusing on the application of pattern recognition methods to fault-prone composite and titanium components on ageing F-16’s. The first goal will be to evaluate the limitations of this methodology, including minimal damage size and discretized severity ranges. The second goal will be to develop analytical and/or FEA techniques to minimize the required physical training.

* Information listed above is at the time of submission. *

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