[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.12989/sss.2011.8.1.119

Implementation of a bio-inspired two-mode structural health monitoring system

Lin, Tzu-Kang (National Center for Research on Earthquake Engineering)
Yu, Li-Chen (Department of Civil Engineering, National Taiwan University)
Ku, Chang-Hung (Department of Civil Engineering, National Taiwan University)
Chang, Kuo-Chun (Department of Civil Engineering, National Taiwan University)
Kiremidjian, Anne (Department of Civil and Environmental Engineering, Stanford University)

Publication Information

Smart Structures and Systems / v.8, no.1, 2011 , pp. 119-137 More about this Journal

Abstract

A bio-inspired two-mode structural health monitoring (SHM) system based on the Na $\ddot{i}$ ve Bayes (NB) classification method is discussed in this paper. To implement the molecular biology based Deoxyribonucleic acid (DNA) array concept in structural health monitoring, which has been demonstrated to be superior in disease detection, two types of array expression data have been proposed for the development of the SHM algorithm. For the micro-vibration mode, a two-tier auto-regression with exogenous (AR-ARX) process is used to extract the expression array from the recorded structural time history while an ARX process is applied for the analysis of the earthquake mode. The health condition of the structure is then determined using the NB classification method. In addition, the union concept in probability is used to improve the accuracy of the system. To verify the performance and reliability of the SHM algorithm, a downscaled eight-storey steel building located at the shaking table of the National Center for Research on Earthquake Engineering (NCREE) was used as the benchmark structure. The structural response from different damage levels and locations was collected and incorporated in the database to aid the structural health monitoring process. Preliminary verification has demonstrated that the structure health condition can be precisely detected by the proposed algorithm. To implement the developed SHM system in a practical application, a SHM prototype consisting of the input sensing module, the transmission module, and the SHM platform was developed. The vibration data were first measured by the deployed sensor, and subsequently the SHM mode corresponding to the desired excitation is chosen automatically to quickly evaluate the health condition of the structure. Test results from the ambient vibration and shaking table test showed that the condition and location of the benchmark structure damage can be successfully detected by the proposed SHM prototype system, and the information is instantaneously transmitted to a remote server to facilitate real-time monitoring. Implementing the bio-inspired two-mode SHM practically has been successfully demonstrated.

Keywords

structural health monitoring; naive bayes; bio-inspired; prototype system;

Citations & Related Records

Times Cited By KSCI : 1 (Citation Analysis)
Times Cited By Web Of Science : 0 (Related Records In Web of Science)
Times Cited By SCOPUS : 0

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