Adverse event detection (AED) system for continuously monitoring and evaluating structural health status

Jinsik Yun; Dong Sam Ha; Daniel J. Inman; Robert B. Owen

doi:10.1117/12.880503

27 April 2011 Adverse event detection (AED) system for continuously monitoring and evaluating structural health status

Jinsik Yun, Dong Sam Ha, Daniel J. Inman, Robert B. Owen

Proceedings Volume 7977, Active and Passive Smart Structures and Integrated Systems 2011; 79771R (2011) https://doi.org/10.1117/12.880503
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

Abstract

Structural damage for spacecraft is mainly due to impacts such as collision of meteorites or space debris. We present a structural health monitoring (SHM) system for space applications, named Adverse Event Detection (AED), which integrates an acoustic sensor, an impedance-based SHM system, and a Lamb wave SHM system. With these three health-monitoring methods in place, we can determine the presence, location, and severity of damage. An acoustic sensor continuously monitors acoustic events, while the impedance-based and Lamb wave SHM systems are in sleep mode. If an acoustic sensor detects an impact, it activates the impedance-based SHM. The impedance-based system determines if the impact incurred damage. When damage is detected, it activates the Lamb wave SHM system to determine the severity and location of the damage. Further, since an acoustic sensor dissipates much less power than the two SHM systems and the two systems are activated only when there is an acoustic event, our system reduces overall power dissipation significantly. Our prototype system demonstrates the feasibility of the proposed concept.

Citation Download Citation

Jinsik Yun, Dong Sam Ha, Daniel J. Inman, and Robert B. Owen "Adverse event detection (AED) system for continuously monitoring and evaluating structural health status", Proc. SPIE 7977, Active and Passive Smart Structures and Integrated Systems 2011, 79771R (27 April 2011); https://doi.org/10.1117/12.880503

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KEYWORDS

Structural health monitoring

Sensors

Acoustics

Digital signal processing

Ferroelectric materials

Prototyping

Signal processing

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