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Impact force calibration method based on load reconstruction |
JIANG Wensong1,2,LUO Zai1, WANG Zhongyu2, ZHANG Li3, HU Xiaofeng1, GUO Bin1 |
1.College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China;
2.School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China;
3.Beijing Changcheng Institute of Metrology & Measurement, China Aviation Industry Group Co. Ltd., Beijing 100095, China |
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Abstract The error of the Impact Force Measurement System comes from the force difference between the measuring point and the collision point because the drop hammer is not a rigid structure. To overcome this error, an calibration method is proposed based on load reconstruction. First, a rth order grey prediction model is applied to filter the structural response on the measuring point of the drop hammer. Second, the load reconstruction model between the measuring point and the collision point is built by the regularization of the kernel matrix. The experimental result shows that the Peak Relative Error (PRE) and the Relative Error (RE) of this method are 0.6% and 3.1% while that of the traditional method are 5.7% and 6.8%. It demonstrates that our suggested method can reduce the PRE by 89.2% and the RE by 54.8% compared with the traditional method. Therefore, Our suggested method is superior to the traditional method.
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Received: 25 February 2019
Published: 28 June 2020
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