Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

Online ISSN 1552-4485; Print ISSN 0033-569X



Some results on the optimal spacing of measurements in the identification of structural systems

Author: F. E. Udwadia
Journal: Quart. Appl. Math. 43 (1985), 263-274
MSC: Primary 93E12
DOI: https://doi.org/10.1090/qam/814225
MathSciNet review: 814225
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Abstract: This paper deals with finding the optimal measurement locations for a structural system modelled by a single-degree-of-freedom oscillator, so that any one of the parameters to be identified can be estimated with a minimum variance. The measurements are assumed to be taken in a noisy environment, and the paper addresses both linear and nonlinear, nonhysteretic systems. Besides the analytical relations deduced for the optimal measurement locations, it is found that, in general, there may exist measurement locations at which no additional information on the parameter under consideration is generated. For the linear case, the optimal measurement locations are found to be independent of the system response and the actual values of the parameters to be identified. They solely depend on the nature of the excitation used in the identification procedure. Analytical results relating to the optimal measurement locations for minimizing the sum of the variances of the estimates of some of the parameters are also provided.

References [Enhancements On Off] (What's this?)

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DOI: https://doi.org/10.1090/qam/814225
Article copyright: © Copyright 1985 American Mathematical Society

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