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Proceedings Paper

Integral structural health and load monitoring of a helicopter tail boom manufactured from aluminum sheet metal with support from frames and stringers by guided ultrasonic waves
Author(s): Gerhard Birkelbach; Wolfgang Grill; Sergey Kuznetsov; Vitalijs Pavelko
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Paper Abstract

Based on mode selective monitoring of the transport of guided ultrasonic waves with high temporal resolution achieved by correlation techniques, a helicopter tail boom section, manufactured from aluminum, has been monitored concerning structural health and load including monitoring under shaker driven conditions. The characteristic sensitivities of the developed health and load monitoring schemes are presented together with methods suitable for the compensation of the influence of temperature variations during monitoring. Concerning the detection of loose joints, a novel monitoring scheme has been introduced capable to detect fluctuations in joints including riveted joints and connections by high-locks. The currently operated system is fully remote controlled and can be operated by internet. Concerning the rather compact size and power consumption, the developed instrumentation is already suitable for in-flight respectively for on-ground hand hold and battery powered operation. The observations, achievements, and results are presented, explained, and discussed.

Paper Details

Date Published: 19 April 2012
PDF: 5 pages
Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 83480Y (19 April 2012); doi: 10.1117/12.914970
Show Author Affiliations
Gerhard Birkelbach, Univ. Leipzig (Germany)
Wolfgang Grill, Univ. Leipzig (Germany)
Sergey Kuznetsov, Riga Technical Univ. (Latvia)
Vitalijs Pavelko, Riga Technical Univ. (Latvia)

Published in SPIE Proceedings Vol. 8348:
Health Monitoring of Structural and Biological Systems 2012
Tribikram Kundu, Editor(s)

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