External Store Separation Prediction Based on Feedforward Neural Network

SONG Juzheng,LIU Siwei,WU Yunshan

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Journal Of Ballistics ›› 2023, Vol. 35 ›› Issue (03) : 33-38. DOI: 10.12115/j.issn.1004-499X(2023)03-005

External Store Separation Prediction Based on Feedforward Neural Network

  • SONG Juzheng,LIU Siwei,WU Yunshan
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Abstract

In order to study the effect of external store drop condition on its separation characteristics and improve the calculation efficiency of the simulation of the separation,an external store separation prediction model was proposed based on the feedforward neural network. The prediction performance of the model was tested and analyzed. The separation of the external store in different drop conditions was numerically simulated by the quasi-steady method. The separation trajectory and attitude data of the external store were obtained and taken as data samples for neural network training. The neural network was then built and trained with the external store drop condition and separation time as the input,and the separation trajectory and attitude were taken as the output. After 1 000 iterations of optimization,the neural network training was completed. The verification results show that the trained neural network can make immediate and accurate predictions of the external store’s separation trajectory and attitude based on the drop condition. The prediction accuracy of trained neural network for the separation trajectory is higher than its prediction accuracy for the separation attitude. In a single drop condition,the neural network prediction time of the separation of external store within 1 s is 0.06 s,and the average time of numerical simulation using the traditional quasi-steady method is 20 h. The proposed method improves the computational efficiency of external store drop separation simulation and offers a new approach for the study of the separation characteristics of aircraft.

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external store drop / trajectory and attitude / neural network / prediction model

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SONG Juzheng,LIU Siwei,WU Yunshan. External Store Separation Prediction Based on Feedforward Neural Network. Journal Of Ballistics. 2023, 35(03): 33-38 https://doi.org/10.12115/j.issn.1004-499X(2023)03-005

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