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Statistical Methodology for Optimal Sensor Locations for Damage Detection in Structures

Beck, James L. and Chan, Eduardo and Papadimitriou, Costas (1998) Statistical Methodology for Optimal Sensor Locations for Damage Detection in Structures. In: 16th International Modal Analysis Conference, February 1998, Santa Barbara, CA. http://resolver.caltech.edu/CaltechAUTHORS:20120926-094748278

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Abstract

A Bayesian statistical methodology is presented for optimally locating the sensors in a structure for the purpose of extracting the most information about the model parameters which can be used in model updating and in damage detection and localization. This statistical approach properly handles the unavoidable uncertainties in the measured data as well as the uncertainties in the mathematical model used to represent the structural behavior. The optimality criterion for the sensor locations is based on information entropy which is a measure of the uncertainty in the model parameters. The uncertainty in these parameters is computed by the Bayesian statistical methodology and then the entropy measure is minimized over the set of possible sensor configurations using a genetic algorithm. Results presented illustrate how both the minimum entropy of the parameters and the optimal sensor configuration depend on the location of sensors, number of sensors, number and type of contributing modes and the structural parameterization (substructuring) scheme used.


Item Type:Conference or Workshop Item (Paper)
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Record Number:CaltechAUTHORS:20120926-094748278
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120926-094748278
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:34413
Collection:CaltechAUTHORS
Deposited By: Carmen Nemer-Sirois
Deposited On:12 Oct 2012 22:58
Last Modified:27 Dec 2012 02:44

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