Abstract
Engine is one of the main sources of vehicle vibration. The major causes of engine vibration are combustion forces transmitted through pistons and connection rods. In order to attenuate this vibration, first step is to evaluate the sources. Assessment of these sources is not an easy task because the internal parts of machinery are not accessible. Instrumentation for such systems is more often costly, time consuming and some modifications should be made. In this paper, a method based on inverse techniques implemented and validated to estimate forces exciting a crankshaft. In the first part, the modal analysis outcomes utilised to reconstruct applied force for a single input system. It was shown that one response channel did not have enough modal information to reconstruct the excitation. Then more channels implemented along the object and reconstructed values overlapped the measurement results. Finally, a multiple input system investigated, special matrix conditioning and inverse techniques were implemented which improved results and validated the method. Responses together with Frequency Response Functions (FRFs) of crankshaft utilised in an inverse problem formulation. Tikhonov regularization used to solve the ill-conditioned inverse system. L-curve criterion employed to find the regularization parameter for the Tikhonov method. This research validated the strong ability of inverse techniques and may be used to estimate internal forces of machinery by response measurements in future.
| Original language | English |
|---|---|
| Title of host publication | 15th International Congress on Sound and Vibration 2008, ICSV 2008 |
| Pages | 1664-1671 |
| Number of pages | 8 |
| Volume | 2 |
| Publication status | Published - 2008 |
| Event | 15th International Congress on Sound and Vibration 2008, ICSV 2008 - Daejeon Duration: 6 Jul 2008 → 10 Jul 2008 |
Other
| Other | 15th International Congress on Sound and Vibration 2008, ICSV 2008 |
|---|---|
| City | Daejeon |
| Period | 6/7/08 → 10/7/08 |
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ASJC Scopus subject areas
- Acoustics and Ultrasonics
Cite this
Utilisation of inverse techniques for vibration source reconstruction. / Fouladi, Mohammad Hosseini; Mohd Nor, Mohd. Jailani; Mohd Ihsan, Ahmad Kamal Ariffin.
15th International Congress on Sound and Vibration 2008, ICSV 2008. Vol. 2 2008. p. 1664-1671.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Utilisation of inverse techniques for vibration source reconstruction
AU - Fouladi, Mohammad Hosseini
AU - Mohd Nor, Mohd. Jailani
AU - Mohd Ihsan, Ahmad Kamal Ariffin
PY - 2008
Y1 - 2008
N2 - Engine is one of the main sources of vehicle vibration. The major causes of engine vibration are combustion forces transmitted through pistons and connection rods. In order to attenuate this vibration, first step is to evaluate the sources. Assessment of these sources is not an easy task because the internal parts of machinery are not accessible. Instrumentation for such systems is more often costly, time consuming and some modifications should be made. In this paper, a method based on inverse techniques implemented and validated to estimate forces exciting a crankshaft. In the first part, the modal analysis outcomes utilised to reconstruct applied force for a single input system. It was shown that one response channel did not have enough modal information to reconstruct the excitation. Then more channels implemented along the object and reconstructed values overlapped the measurement results. Finally, a multiple input system investigated, special matrix conditioning and inverse techniques were implemented which improved results and validated the method. Responses together with Frequency Response Functions (FRFs) of crankshaft utilised in an inverse problem formulation. Tikhonov regularization used to solve the ill-conditioned inverse system. L-curve criterion employed to find the regularization parameter for the Tikhonov method. This research validated the strong ability of inverse techniques and may be used to estimate internal forces of machinery by response measurements in future.
AB - Engine is one of the main sources of vehicle vibration. The major causes of engine vibration are combustion forces transmitted through pistons and connection rods. In order to attenuate this vibration, first step is to evaluate the sources. Assessment of these sources is not an easy task because the internal parts of machinery are not accessible. Instrumentation for such systems is more often costly, time consuming and some modifications should be made. In this paper, a method based on inverse techniques implemented and validated to estimate forces exciting a crankshaft. In the first part, the modal analysis outcomes utilised to reconstruct applied force for a single input system. It was shown that one response channel did not have enough modal information to reconstruct the excitation. Then more channels implemented along the object and reconstructed values overlapped the measurement results. Finally, a multiple input system investigated, special matrix conditioning and inverse techniques were implemented which improved results and validated the method. Responses together with Frequency Response Functions (FRFs) of crankshaft utilised in an inverse problem formulation. Tikhonov regularization used to solve the ill-conditioned inverse system. L-curve criterion employed to find the regularization parameter for the Tikhonov method. This research validated the strong ability of inverse techniques and may be used to estimate internal forces of machinery by response measurements in future.
UR - http://www.scopus.com/inward/record.url?scp=84883414458&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84883414458&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84883414458
SN - 9781627481519
VL - 2
SP - 1664
EP - 1671
BT - 15th International Congress on Sound and Vibration 2008, ICSV 2008
ER -