任乐亮1(
), 鲜勇1, 李少朋1,2, 雷刚1, 伍薇1, 李冰1
收稿日期:2022-09-01
修回日期:2022-09-16
接受日期:2022-11-05
出版日期:2023-07-25
发布日期:2022-11-17
通讯作者:
任乐亮
E-mail:renleliang@126.com
基金资助:
Leliang REN1(
), Yong XIAN1, Shaopeng LI1,2, Gang LEI1, Wei WU1, Bing LI1
Received:2022-09-01
Revised:2022-09-16
Accepted:2022-11-05
Online:2023-07-25
Published:2022-11-17
Contact:
Leliang REN
E-mail:renleliang@126.com
Supported by:摘要:
针对弹道导弹大机动突防后精确制导面临的落点预测需求,提出了一种基于改进二阶优化器学习的神经网络落点预测方法。基于椭圆弹道理论对当前飞行状态的落点进行预测,再求解与真实落点的偏差,并对偏差量进行解耦处理,进而构建了以飞行状态量为输入、以偏差量为输出的样本集,大幅降低了神经网络学习难度。为提高神经网络预测精度,采用3个神经网络分别预测偏差量的3个分量;利用矩阵分块运算法则建立了适用于多GPU并行的改进Levenberg-Marquardt优化器,缩短了网络学习时间且降低了对GPU显存的需求量。设计了详细的仿真实验对该方法的优势和计算复杂度进行了分析,仿真结果表明,落点预测模型的学习难度小,预测精度高,实时性好。在训练集和测试集所含869 320个样本中,
中图分类号:
任乐亮, 鲜勇, 李少朋, 雷刚, 伍薇, 李冰. 基于改进二阶优化器并行学习的弹道导弹神经网络落点预测方法[J]. 航空学报, 2023, 44(14): 327964.
Leliang REN, Yong XIAN, Shaopeng LI, Gang LEI, Wei WU, Bing LI. A neural network model for impact point prediction of ballistic missile based on improved second-order optimizer with parallel learning[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(14): 327964.
表5
训练耗时和显存占用量
| 网络模型 | 网络节点数 | 1 000代训练平均耗时/s | 耗时降低率/% | 显存占用量/MB | 显存占用量/MB | ||||
|---|---|---|---|---|---|---|---|---|---|
| 隐藏层1 | 隐藏层2 | GPU1 | GPU2 | GPU1 | GPU2 | ||||
| 5 | 2 | 2 | 59.97 | 32.30 | 2 105 | 2 003 | 1 563 | 1 461 | |
| 1 | 88.58 | 3 233 | 2 127 | ||||||
| 6 | 5 | 2 | 62.26 | 36.00 | 2 483 | 2 381 | 1 743 | 1 641 | |
| 1 | 97.28 | 3 907 | 2 501 | ||||||
| 16 | 9 | 2 | 233.68 | 47.46 | 6 509 | 6 405 | 3 793 | 3 689 | |
| 1 | 444.73 | 12 043 | 6 527 | ||||||
| 17 | 16 | 2 | 1 511.55 | 48.86 | 19 531 | 19 429 | 10 201 | 10 099 | |
| 1 | 2 955.88 | 显存不足 | 19 553 | ||||||
| 20 | 15 | 2 | 1 875.13 | 49.18 | 21 577 | 21 475 | 11 317 | 11 215 | |
| 1 | 3 689.83 | 显存不足 | 21 599 | ||||||
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