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The Influence of Frequency Response Function Estimators on the Approximation of Modal Parameters
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Abstract
It has been shown that the various Frequency Response Function (FRF) Estimators will account for certain types of measurement bias. The motivation behind these estimators is to obtain a more accurate FRF from which modal parameters are obtained. This research addresses the practicality of using a specialized FRF Estimator by comparing the accuracy of the resultant modal parameter estimates.
This study of single input/single output systems focuses on the use of scaled FRF Estimators as applied to bivariate data with correlated contaminants.
Authors
- James P. De Clerck - Dept. of Mechanical Engineering - Engineering Mechanics Michigan Technological Univ. Houghton, MI
- Chuck van Karsen - Dept. of Mechanical Engineering - Engineering Mechanics Michigan Technological Univ. Houghton, MI
- William Shapton - Dept. of Mechanical Engineering - Engineering Mechanics Michigan Technological Univ. Houghton, MI
Topic
Citation
De Clerck, J., van Karsen, C., and Shapton, W., "The Influence of Frequency Response Function Estimators on the Approximation of Modal Parameters," SAE Technical Paper 891165, 1989, https://doi.org/10.4271/891165.Also In
References
- Bendat, J. S. Piersol, A. G. Random Data: Analysis and Measurement Procedures 2nd John Wiley and Sons New York, New York 1986
- Mitchell, L. D. “Improved Methods for the FFT Calculation of Frequency Response Functions” American Society of Mechanical Engineering Transactions 1982 104 277 279
- Wicks, A. “Estimation of Frequency Response Functions in the Presence of Uncorrelated Signal Content” Michigan Technological University 1986
- De Clerck, J. P. “Development and Analysis of a Frequency Response Function Estimator Based on the Correlated Contaminant Model” Michigan Technological University 1988
- De Clerck, J. P. Van Karsen, C. Shapton, W. R. “Estimation of Frequency Response Functions in the Presence of Correlated Signal Contaminants” 7th International Modal Analysis Conference February 1989 Las Vegas, Nevada 619 264
- Wicks, A. L. Han, Man-Cheol “The Influence of Frequency Response Function Estimation Method on Modal Parameter Estimates” 7th International Modal Analysis Conference February 1989 817 821
- Shust, W. C. “A Comparison of Modal Parameters for Lightly Damped Systems (Calculated Using Exponentially Windowed Burst Random Multiple Input Excitation and Alternative Frequency Response Function Estimators)” Michigan Technological University 1987