一种基于两级判别逻辑的小型化冲击区域监测系统

doi:10.7527/S1000-6893.2013.0537

Abstract

Abstract:

It is highly necessary to monitor impact events occurring on composite structures on line and on board. In this paper, an airborne oriented miniaturized impact region monitoring system is developed based on a two-step decision logic. First, the two-step decision logic based impact region localization method is proposed, which is realized in a field programmable gate array (FPGA) and used to record impact events online. The accuracy of impact region localization is improved by using this method. Second, a miniaturized impact region monitoring system is developed. In this system, passive filters and comparators are used to replace the analog circuit and turn the impact response signals directly into digital sequences, and an FPGA is used to replace the digital circuit, which simplifies the circuit and greatly reduces the size and weight of the impact monitoring system. The system has the following characteristics: small size, light weight, low power consumption and numerous piezoelectric transducers supported. The experimental validation results obtained on a carbon fiber composite wing box structure with many stiffeners and bolts show that the impact region monitoring system can respond to impact events and localize them accurately.

Key words: composite structure, structural health monitoring, impact monitoring system, piezoelectric transducer, digital sequence

CLC Number:

V19
TP302

QIU Lei, QIAN Weifeng, YUAN Shenfang, MEI Hanfei. A Two-step Decision Logic Based Miniaturized Impact Region Monitoring System[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014, 35(9): 2551-2558.

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A Two-step Decision Logic Based Miniaturized Impact Region Monitoring System

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