This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Time Variant Discrete Fourier Transform as an Order Tracking Method
Annotation ability available
Sector:
Language:
English
Abstract
Present order tracking methods for solving noise and vibration problems are reviewed, both FFT and re-sampling based order tracking methods. The time variant discrete Fourier transform (TVDFT) is developed as an alternative order tracking method. This method contains many advantages which the current order tracking methods do not possess. This method has the advantage of being very computationally efficient as well as the ability to minimize leakage errors. The basic TVDFT method may also be extended to a more complex method through the use of an orthogonality compensation matrix (OCM) which can separate closely spaced orders as well as separate the contributions of crossing orders. The basic TVDFT is a combination of the FFT and the re-sampling based methods. This method can be formulated in several different manners, one of which will give results matching the re-sampling based methods very closely. Both analytical and experimental data are used to establish the behavioral characteristics of this new method.
Recommended Content
| Technical Paper | Root Mean Square Response of Transducer Systems to Spectral Density Inputs |
Authors
Citation
Blough, J., Brown, D., and Vold, H., "The Time Variant Discrete Fourier Transform as an Order Tracking Method," SAE Technical Paper 972006, 1997, https://doi.org/10.4271/972006.Also In
References
- Leuridan J. Vold H. Kopp G. Moshrefi N. “High Resolution Order Tracking Using Kalman Tracking Filters - Theory and Applications” Proceedings of the SAE Noise and Vibration Conference Traverse City, MI. 1995 SAE paper no. 951332
- Bendat J.S. Piersol A.G. “Random Data, Analysis and Measurement Procedures” 2nd Wiley-Interscience New York 411 417 1986
- Van de Ponseele P. Van der Auweraer H. Mergeay M. “A Global Approach to the Acquisition and Analysis of Harmonic Waveforms” Proceedings of International Modal Analysis Conference 7 Las Vegas, NV. 1290 1299 1989
- Potter R. Gribler M. “Computed Order Tracking Obsoletes Older Methods” Proceedings of the SAE Noise and Vibration Conference Traverse City, MI. 1989 SAE paper no. 891131
- Van de Ponseele P. Van der Auweraer H. Mergeay M. “Performance Evaluation of Advanced Signature Analysis Techniques” Proceedings of International Modal Analysis Conference 7 Las Vegas, NV. 154 158 1989
- Rabiner L. Gold B. “Theory and Application of Digital Signal Processing” Prentice Hall International London 390 399 1975
- Blough J.R. Brown D.L. Vold H. “Order Tracking with the Time Variant Discrete Fourier Transform” Proceedings of the International Seminar of Modal Analysis - 21 Leuven, Belgium 1996
- Vold H. Leuridan J. “High Resolution Order Tracking at Extreme Slew Rates, Using Kalman Tracking Filters” Proceedings of the SAE Noise and Vibration Conference Traverse City, MI. 1993 SAE paper no. 931288