VIBRATION SOURCE ESTIMATION INSIDE OF MACHINERY
H., F., M., N., K., A., S., A. (2008). VIBRATION SOURCE ESTIMATION INSIDE OF MACHINERY. EKB Journal Management System, 13(13th International Conference on Applied Mechanics and Mechanical Engineering.), 23-33. doi: 10.21608/amme.2008.38993
FOULADI M. H.; NOR M.J. M.; ARIFFIN A. K.; ABDULLAD S.. "VIBRATION SOURCE ESTIMATION INSIDE OF MACHINERY". EKB Journal Management System, 13, 13th International Conference on Applied Mechanics and Mechanical Engineering., 2008, 23-33. doi: 10.21608/amme.2008.38993
H., F., M., N., K., A., S., A. (2008). 'VIBRATION SOURCE ESTIMATION INSIDE OF MACHINERY', EKB Journal Management System, 13(13th International Conference on Applied Mechanics and Mechanical Engineering.), pp. 23-33. doi: 10.21608/amme.2008.38993
H., F., M., N., K., A., S., A. VIBRATION SOURCE ESTIMATION INSIDE OF MACHINERY. EKB Journal Management System, 2008; 13(13th International Conference on Applied Mechanics and Mechanical Engineering.): 23-33. doi: 10.21608/amme.2008.38993

VIBRATION SOURCE ESTIMATION INSIDE OF MACHINERY

The International Conference on Applied Mechanics and Mechanical Engineering
Article 17, Volume 13, 13th International Conference on Applied Mechanics and Mechanical Engineering., May 2008, Page 23-33  XML PDF (357.42 K)
Document Type: Original Article
DOI: 10.21608/amme.2008.38993
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Authors
FOULADI M. H.1; NOR M.J. M.2; ARIFFIN A. K.2; ABDULLAD S.3
1PhD Candidate, Dep. of Mech. Eng, Faculty of Eng., Universiti Kebangsaan Malaysia.
2Professor, Dep. of Mech. Eng, Faculty of Eng., Universiti Kebangsaan Malaysia.
3Assoc. Professor, Dep. of Mech. Eng, Faculty of Eng., Universiti Kebangsaan Malaysia.
Abstract
ABSTRACT
In this paper, signal processing is integrated with inverse techniques to solve inverse
problem for internal parts of machinery in which, sources are unknown and
inaccessible. Explosions of an internal combustion engine produce powerful pulses of
energy which cause the engine vibration as a response. Attenuation of engine vibration
is one of the important problems for NVH engineers. Engine vibration can affect the
whole chassis vibration and interior noise level. Engine vibration is the dominant source
of noise emissions (less than 200Hz) inside the vehicle compartment. In this research,
inverse techniques are implemented to estimate unknown amount of vibration sources.
Tikhonov regularization carried out to stabilize solution of ill-posed problem. L-curve
method is also utilised to find the regularization parameter.
In comparison with transfer path analysis, this method doesn’t need to separate the
observation part from the system. Despite the coherence based methods, it is practical
in low frequency analysis of engine with missing inputs and outputs.
Keywords
Vibration source estimation; Inaccessible sources; Inverse technique; Picard condition; L-curve; Tikhonov regularization
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