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Conditioned Source Analysis, A Technique for Multiple Input System Identification with Application to Combustion Energy Separation in Piston Engines
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Abstract
An enhanced method for solving multi-input systems is presented which builds on the concepts of partial coherence using conditioned input analysis and virtual coherence using principal component analysis. Conditioned source analysis expands the definition of partially coherent inputs to include partially coherent input arrays. Each input array may describe a complex multi-dimensional source. The cross correlated input array is replaced by its equivalent principal component decomposition and conditioned from subsequent inputs/arrays using the techniques for determining partial coherence. The extension of existing theory to include conditioned source analysis is described and the method is illustrated on a lumped-parameter model. A practical application of the technique is also presented where the component of noise and vibration in an engine which is statistically related to combustion is separated from mechanically induced sources.
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Citation
Albright, M., "Conditioned Source Analysis, A Technique for Multiple Input System Identification with Application to Combustion Energy Separation in Piston Engines," SAE Technical Paper 951376, 1995, https://doi.org/10.4271/951376.Also In
References
- Bendat, J.S. Piersol, A.G. “Random Data: Analysis and Measurement Procedures,” Wiley-Interscience New York 1986
- Dodds, C.J. Robson, J.D. “Partial Coherence in Multivariate Random Processes,” Journal of Sound Vibration 42 2 1975 243 249
- Bendat, J.S. “Solutions for the Multiple Input/Output Problem,” Journal of Sound and Vibration 44 3 1976 311 325
- Bendat, J.S. “System Identification From Multiple Input/Output Data,” Journal of Sound Vibration 49 3 1976 293 308
- Otte, D. Sas, P. Snoeys, R. “Use of Component Analysis and Virtual Coherence for Dominant Noise Source Identification,” Proceedings of the Second International Seminar on Noise Identification and Numerical Methods in Acoustics September 1987 1 10
- Leuridan, J. Roesems, D. Otte, D. “Use of Principal Component Analysis for Correlation Analysis Between Vibration and Acoustical Signals,” Proceedings ISATA 87 Florence, Italy 1987
- Noble, B. Daniel, J.W. “Applied Linear Algebra,” Prentice-Hall New Jersey 1977
- Halvorsen, W.G. Barney, P.S. Brown, D.L. “Developing Impedance-Type Models of Structural/Acoustic Systems,” Sound and Vibration August 1991 18 26
- Alpini, A. Busso, M. Ruspa, G. Turino, G. “Analysis techniques of Combustion Noise and Vibration in Diesel Engines,” Society of Automotive Engineers Paper 800406 SAE Congress and Exposition Detroit MI Feb 1980
- Coleman, R.B. Hodgson, T.H. Bailey, J.R. “Punch Press Noise Signature Analysis Using Digital Signal Processing Techniques,” Proceedings of Noise-Con 81 1981 North Carolina State University 275 278
- Wang, M.E. Crocker, M.J. “On the Application of Coherence Techniques for Source Identification in a Multiple Noise Source Environment,” J. Acoust. Soc. Am. 74 3 September 1983 861 872
- Bendat, J.S. Piersol, A.G. “Engineering Applications of Correlation and Spectral Analysis,” Wiley-Interscience New York 1980
- Otte, D. Fyfe, K. Sas, P. “Use of Principal Component Analysis for Dominant Noise Source Identification,” Proceedings of the International Conference on Advances on the Control and Refinement of Vehicle Noise March 1988
- Ufford, D. “Development of a Digital Signal Processing Techniques to Determine the Number of Incoherent Sources in a System,” Masters Thesis Purdue University 1990
- Hendricx, W. Vandenbroeck, D. “Suspension Analysis in View of Road Noise Optimization,” Society of Automotive Engineers Paper No. 931343 SAE Noise and Vibration Conference Traverse City MI May 1993
- Price, S.M. Bernhard, R.J. “Virtual Coherence: A Digital Signal Processing Technique for Incoherent Source Identification.” Proceedings of 4th Annual Modal Analysis Conference 1986 1256 1262
- Flotho, A. Spessert, B. “Development Methods for Low Noise Diesel Engines,” Society of Automotive Engineers Paper No. 872249 SAE Truck and Bus Meeting and Exposition Dearborn MI November 1987
- Dixon, J. Grover, E.C. Priede T. “Simulation of Combustion Induced Noise in a Non-Running Engine Structure by Impulsive Hydraulic Excitation,” Society of Automotive Engineers Paper No. 820364 1982
- Reinhart, T. “An Evaluation of the Lucas Combustion Noise Meter on Cummins ‘B’ Series Engines,” Society of Automotive Engineers Paper No. 870952 SAE Noise and Vibration Conference Traverse City, MI April 1987
- Yawata, Y. Crocker, M.J. “Identification of Internal Noise Sources in Diesel Engines,” Society of Automotive Engineers Paper No. 831330 International Off-Highway Meeting & Exposition Milwaukee, WI September 1983
- Kojima, N. “An Evaluation of Combustion Noise Generation in Diesel Engine Structure,” Society of Automotive Engineers Paper No. 890126 SAE International Congress and Exposition Detroit MI February 1989
- Russell, M.F. “Diesel Engine Noise: Control at Source,” Society of Automotive Engineers Paper No. 820238 SAE International Congress and Exposition Detroit MI February 1982