基于机器学习算法的旋成体航行器表面压力预测

Surface pressure prediction of convolutional vehicle based on machine learning algorithm

  • 摘要: 表面压力是旋成体航行器姿态控制和运动参数设计与评估的重要指标。为了获取作业过程中航行器表面压力的全域分布特性,本文设计了一套基于机器学习的表面压力重构算法。不同的航行工况下航行器表面压力分布状态不同,通过在旋成体航行器表面布置压力观测点并利用其压力观测值的分布,可以反向表征航行工况。本文将有限个航行器表面压力观测点的观测值及其三维点云坐标作为输入信息,训练得到了一个从有限个离散观测点压力到航行器表面全域压力分布的映射模型。为了探究模型的性能,在多个不同测试数据集上进行了表面压力的全域预测实验。结果表明,训练得到的机器学习模型能够高精度地预测全域压力分布,预测误差可控制在10%以内,同时具备鲁棒性。

     

    Abstract: Surface pressure is an important index in the evaluation of the attitude control and motion characteristics of the conwolutional vehicle. In order to determine the full-domain surface pressure distribution of the vehicle during navigation, a surface pressure reconstruction algorithm based on machine learning is proposed. The surface pressure distribution of the convolutional vehicle may vary under different sailing environments. By arranging pressure observation points on the surface of the convolutional vehicle and obtaining the distribution of these pressure date, the corresponding navigational conditions can be characterized. In this paper, the pressure obtained from a finite number of observation points on the surface, as well as their coordinates, are used as input information of the model. Then we can obtain a mapping model from discrete pressure date to the full domain pressure distribution. To investigate the performance of the model, full-domain surface pressure prediction experiments are conducted on several different test datasets. The results demonstrate that our machine learning-based model can achieve high-precision surface pressure reconstruction, and the relative error of the predicted value can be reduced to within 10%.

     

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