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Signal Processing Algorithm for Controlling Dynamic Bandwidth of Fiber Optic Accelerometer  

Kim, Dae-Hyun (Department of Mechanical Engineering, Seoul National University of Technology)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.27, no.4, 2007 , pp. 291-298 More about this Journal
Abstract
This paper presents a signal processing algorithm to control the dynamic bandwidth of a single-degree-of-freedom (SDF) dynamic sensor system. An accelerometer is a representative SDF sensor system. In this paper, a moire-fringe-based fiber optic accelerometer is newly used for the test of the algorithm. The accelerometer is composed of one mass, one damper and one spring as a SDF dynamic system. In order to increase the dynamic bandwidth of the accelerometer, it is needed to increase the spring constant or decrease the mass. However, there are mechanical difficulties of this adjustment. Therefore, the presented signal processing algorithm is very effective to overcome the difficulties because it is just adjustment in the signal processing software. In this paper, the novel fiber optic accelerometer is introduced shortly, and the algorithm is applied to the fiber optic accelerometer to control its natural frequency and damping ratio. Several simulations and experiments are carried out to prove the performance of the algorithm. As a result, it is shown that the presented signal processing algorithm is a good way to broaden the dynamic bandwidth of the fiber optic accelerometer.
Keywords
Structural Health Monitoring; Moire Fringe Based Fiber Optic Accelerometer; Dynamic Bandwidth; Signal Processing Algorithm;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 김대현, 'Ambient vibration-measurement of real building structure by using fiber optic accelerometer system,' 한국비파괴검사학회지, 제26권, 제6호, pp. 373-379, (2006)   과학기술학회마을
2 Daniel Post, Bongtae Han and Peter Ifju, High Sensitivity Moire, Springer-Verlag., New York, (1994)
3 Kazuro Kageyama, Hideaki Murayama, Isamu Ohsawa, Makoto Kanai, Keiichi Nagata, Yuichi Machijima and Fumio Matsumura, 'Acoustic emission monitoring of a reinforced concrete structure by applying new fiber-optic sensors,' Smart Mater. Struct., Vol. 14, S52-S59, (2005)   DOI   ScienceOn
4 박상욱, 김대현, 김천곤, '광섬유 EFPI 센서를 이용한 나노 이송장치의 개발', 센서학회지, 제14권, 제5호, pp. 302-307, (2005)   DOI
5 Hong-Nan Li, Dong-Sheng Li and Gang-Bing Song, 'Recent applications of fiber optic sensors to health monitoring in civil engineering,' Engineering Structures, Vol. 26, pp. 1647-1657, (2004)   DOI   ScienceOn
6 김대현, Maria Q. Feng, '토목구조물 건전성 모니터링을 위한 무아레 프린지 기법 광섬유 가속도계 시스템 개발', 한국센서학회지, 제15권, 제1호, pp. 40-46, (2006)   과학기술학회마을   DOI
7 M. Q. Feng and J. M. Kim, 'Identification of a dynamic system using ambient vibration measurements,' Journal of Applied Mechanics (ASME), Vol. 65, No. 2, pp. 1010-1023, (1998)   DOI   ScienceOn
8 Dae-Hyun Kim, Bon-Yong Koo, Chun-Gon Kim and Chang-Sun Hong, 'Damage detection of composite structures using a stabilized extrinsic fabry-perot interferometric sensor system,' Smart Mater. Struct., Vol. 13, No. 3, ppo 593-598, (2004)   DOI   ScienceOn