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Swept-sine integration method for complex amplitude extraction of swept-sine signal

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Abstract

Swept-sine vibration test plays a significant role in product validations. As its basic step, the accuracy and efficiency of complex amplitude (which includes the amplitude and phase information of swept-sine signal) extraction have an important impact on the performance of swept-sine vibration test. In order to improve the efficiency while ensuring its accuracy, a swept-sine integration method is proposed. The proposed swept-sine integration method, which is inspired by tracking filter method and tracking integration method, utilizes a weighted integral process to extract the complex amplitude. A numeral example is presented to compare the performance of the proposed method with several other methods for complex amplitude extraction which are also reviewed in this paper. By comparing the results of the numerical example, some light is shed on the strength of the method proposed. Afterwards, the swept-sine integration method is applied in a real test, further validating the appliance value of this method.

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Acknowledgments

The study was performed in the State Key Laboratory of Mechanics and Control of Mechanical Structures. This project is funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, China.

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Authors and Affiliations

  1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China

    Wei Zheng, Huaihai Chen & Ronghui Zheng

  2. BSH Electrical Appliances Co., Ltd (Jiangsu), Nanjing, Jiangsu, China

    Xuli Cui

Authors
  1. Wei Zheng
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  2. Xuli Cui
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  3. Huaihai Chen
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  4. Ronghui Zheng
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Corresponding author

Correspondence to Huaihai Chen.

Additional information

Wei Zheng is a Ph.D. student at the Nanjing University of Aeronautics and Astronautics. His research interests include MIMO vibration control and inverse system.

Huaihai Chen is a Professor and Doctoral Supervisor at the Nanjing University of Aeronautics and Astronautics. His research interests include MIMO vibration control, modal identification and so on.

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Zheng, W., Cui, X., Chen, H. et al. Swept-sine integration method for complex amplitude extraction of swept-sine signal. J Mech Sci Technol 34, 4981–4988 (2020). https://doi.org/10.1007/s12206-020-1103-6

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  • DOI: https://doi.org/10.1007/s12206-020-1103-6

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