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| Dynamic load identification of satellite-rocket interface based on BP neural network |
| CHEN Shuhai1, 3, GUO Anfeng2, WU Shaoqing2, FEI Qingguo1 |
1.School of Mechanical Engineering, Southeast University, Nanjing 211189, China;
2.School of Civil Engineering, Southeast University, Nanjing 211189, China;
3.Shanghai Satellite Engineering Research Institute, Shanghai 201109, China |
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Abstract A new method for the identification of dynamic load between satellite and rocket by using BP neural network is proposed. At first, a high-fidelity dynamic model of the satellite structure is built and the data base including both the structural response of the satellite and the base excitation acceleration at the interface between satellite and rocket can be obtained via numerical analysis or ground experiments; Secondly, the relationship between the structural response of the satellite and the excitation acceleration at the interface between satellite and rocket can be trained by using BP neural network, based on which the base excitation acceleration at the interface between satellite and rocket can be identified from measured structural response of the satellite; Finally, by applying the identified base excitation acceleration on the high-fidelity dynamic model of the satellite structure, the dynamic load at the interface between satellite and rocket can be calculated. Numerical simulation and vibration test are conducted to verify the effectiveness of the proposed method, which can provide strong support on the prediction of vibration load environment of the satellite structure under service condition.
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Received: 16 May 2022
Published: 15 March 2023
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