Optimal Accelerometer Locations for Structural Health Monitoring Using Time-Domain System Identification

Abstract:

Article Preview

The paper presents two algorithms for determining optimal accelerometer locations for structural health monitoring when structural condition is assessed by a system identification scheme in time-domain. The accelerometer locations are determined by ranking the components of an effective independent distribution vector computed from a Fisher information matrix. One of the proposed algorithms formulates a Fisher information matrix by multiplying acceleration matrix with its transpose and the other as a Gauss-Newton Hessian matrix composed of acceleration sensitivities with respect to structural parameters. Since the structural parameters cannot be known exactly in an actual application, a statistical approach is proposed by setting an error bound between the actual and the baseline values. To examine the algorithm, simulation studies have been carried out on a two-span planar truss. The results using locations selected by the two algorithms were compared.

Info:

Periodical:

Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi

Pages:

273-277

DOI:

10.4028/www.scientific.net/KEM.321-323.273

Citation:

S. J. Kwon et al., "Optimal Accelerometer Locations for Structural Health Monitoring Using Time-Domain System Identification", Key Engineering Materials, Vols. 321-323, pp. 273-277, 2006

Online since:

October 2006

Export:

Price:

$35.00

[1] I. Yeo, S. Shin, H.S. Lee and S.P. Chang: Statistical damage assessment of framed structures from static responses: ASCE, J. of Eng. Mech. Vol. 126-4 (2000), pp.414-421.

DOI: 10.1061/(asce)0733-9399(2000)126:4(414)

[2] T.D. Fadale, A.V. Nenarokomov and A.F. Emery: Two approaches to optimal sensor locations: J. of Heat Transfer Vol. 117 (1995), pp.373-379.

DOI: 10.1115/1.2822532

[3] D.C. Kammer: Optimal sensor placement for modal identification using system-realization methods: J. of Sound and Vibration: Vol. 19-3 (1996), pp.729-731.

DOI: 10.2514/3.21688

[4] S.J. Kwon, S. Shin, H.S. Lee and Y.H. Park: Design of accelerometer layout for structural monitoring and damage detection: KSCE, J. of Civil Eng., Vol. 7-6 (2003), pp.717-724.

DOI: 10.1007/bf02829140

[5] J.E.T. Penny, M.I. Friswell and S.D. Garvey: Automatic choice of measurement locations for dynamic testing: AIAA J. Vol. 32-2 (1994), pp.407-414.

DOI: 10.2514/3.11998

[6] F.E. Udwadia: Methodology for optimum sensor locations for parameter identification in dynamic systems: ASCE, J. of Eng. Mech. Vol. 120-2 (1994), pp.368-390.

DOI: 10.1061/(asce)0733-9399(1994)120:2(368)

[7] H.W. Park, S. Shin and H.S. Lee: Determination of an optimal regularization factor in system identification with Tikhonov regularization for linear elastic continua: International J. for numerical Methods in Eng., Vol. 51-10 (2001), pp.1211-1230.

DOI: 10.1002/nme.219

In order to see related information, you need to Login.