کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
562082 875356 2008 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Uncertainty bounds on modal parameters obtained from stochastic subspace identification
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
پیش نمایش صفحه اول مقاله
Uncertainty bounds on modal parameters obtained from stochastic subspace identification
چکیده انگلیسی

The modal parameters of a structure that are estimated from ambient vibration measurements are always subject to bias and variance errors. In this paper, it is discussed how part of the bias errors can be removed and how the variance errors can be estimated from a single ambient vibration test. The bias removal procedure makes use of a stabilization diagram. The variance estimation procedure uses the first-order sensitivity of the modal parameter estimates to perturbations of the measured output-only data. This methodology, that is generally applicable, is illustrated here for the reference-based covariance-driven stochastic subspace identification algorithm. Both simulated and measured vibration data are used to demonstrate the accuracy and practicability of the derived expressions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanical Systems and Signal Processing - Volume 22, Issue 4, May 2008, Pages 948–969
نویسندگان
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