Correction of Transducers Mass Effects from the Measured FRFs in Hammer Impact Testing
In modal testing, the measured frequency response functions (FRFs) are often affected by transducer mass effects. Especially when multiple sensors are employed, transducers mass effects are more significant. This paper deals with removing sensors mass effects from the measured FRFs in hammer impact...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2017-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2017/6857326 |
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| _version_ | 1849410529786855424 |
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| author | Jun Ren Jun Wang Shusheng Bi |
| author_facet | Jun Ren Jun Wang Shusheng Bi |
| author_sort | Jun Ren |
| collection | DOAJ |
| description | In modal testing, the measured frequency response functions (FRFs) are often affected by transducer mass effects. Especially when multiple sensors are employed, transducers mass effects are more significant. This paper deals with removing sensors mass effects from the measured FRFs in hammer impact testing. The proposed method offers some advantages over the available techniques in that extra FRFs measurements with different configurations are not required during the correction process. Firstly, correction method for single accelerometer case is discussed. Further, general correction formulation for multiple accelerometers case is derived. Then, validations of the proposed method are demonstrated using simulated and experimental data. It shows good effectiveness in experimental validation for single accelerometer case. Numerical simulation also demonstrates a good performance for multiple accelerometers case. However, further simulations with noisy-polluted data show that the accuracy of correction results will be affected to some extent by the noise. It is suggested that the measured FRFs be preprocessed using the curve-fitting procedure or noise reduction processing before applying the proposed method. |
| format | Article |
| id | doaj-art-7b26e85a86f048229e75a59bcf2bc46b |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-7b26e85a86f048229e75a59bcf2bc46b2025-08-20T03:35:06ZengWileyShock and Vibration1070-96221875-92032017-01-01201710.1155/2017/68573266857326Correction of Transducers Mass Effects from the Measured FRFs in Hammer Impact TestingJun Ren0Jun Wang1Shusheng Bi2School of Mechanical Engineering, Hubei University of Technology, Wuhan, Hubei 430068, ChinaSchool of Mechanical Engineering, Hubei University of Technology, Wuhan, Hubei 430068, ChinaRobotics Institute, Beihang University, Beijing 100091, ChinaIn modal testing, the measured frequency response functions (FRFs) are often affected by transducer mass effects. Especially when multiple sensors are employed, transducers mass effects are more significant. This paper deals with removing sensors mass effects from the measured FRFs in hammer impact testing. The proposed method offers some advantages over the available techniques in that extra FRFs measurements with different configurations are not required during the correction process. Firstly, correction method for single accelerometer case is discussed. Further, general correction formulation for multiple accelerometers case is derived. Then, validations of the proposed method are demonstrated using simulated and experimental data. It shows good effectiveness in experimental validation for single accelerometer case. Numerical simulation also demonstrates a good performance for multiple accelerometers case. However, further simulations with noisy-polluted data show that the accuracy of correction results will be affected to some extent by the noise. It is suggested that the measured FRFs be preprocessed using the curve-fitting procedure or noise reduction processing before applying the proposed method.http://dx.doi.org/10.1155/2017/6857326 |
| spellingShingle | Jun Ren Jun Wang Shusheng Bi Correction of Transducers Mass Effects from the Measured FRFs in Hammer Impact Testing Shock and Vibration |
| title | Correction of Transducers Mass Effects from the Measured FRFs in Hammer Impact Testing |
| title_full | Correction of Transducers Mass Effects from the Measured FRFs in Hammer Impact Testing |
| title_fullStr | Correction of Transducers Mass Effects from the Measured FRFs in Hammer Impact Testing |
| title_full_unstemmed | Correction of Transducers Mass Effects from the Measured FRFs in Hammer Impact Testing |
| title_short | Correction of Transducers Mass Effects from the Measured FRFs in Hammer Impact Testing |
| title_sort | correction of transducers mass effects from the measured frfs in hammer impact testing |
| url | http://dx.doi.org/10.1155/2017/6857326 |
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