球形弹丸正撞击碎片云头部形状的辨识

安凯

doi:10.11883/1001-1455(2014)04-0404-05

球形弹丸正撞击碎片云头部形状的辨识

doi: 10.11883/1001-1455(2014)04-0404-05

安凯^,

山东航天电子技术研究所, 山东烟台 264003

基金项目: 国防科工局空间碎片“十二五”计划项目(k0201210)

详细信息

作者简介:
安凯(1957—), 男, 博士后, 研究员

中图分类号: O347;V423.42
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- HTML全文浏览量: 326
- PDF下载量: 473
- 被引次数: 0
出版历程
- 收稿日期: 2012-12-26
- 修回日期: 2013-03-08
- 刊出日期: 2014-07-25

Head shape recognition of debris cloud producedby normal impact of spherical projectile

An Kai^,

Shandong Aerospace Electro-technology Institute, Yantai 264003, Shandong, China

More Information

Corresponding author: An Kai, ankai2007@163.com

摘要

摘要: 为了辨识碎片云头部形状，提出了对其形状进行边缘提取、利用二次函数进行边缘最优拟合、并根据拟合结果作出判断的方法。给出了二次函数对边缘的最优拟合算法。对来自不同文献的4幅碎片云图像，提取了他们头部的边缘曲线，进行了最优拟合和形状辨识。辨识结果显示，3幅图像的头部形状为抛物线，1幅图像的头部形状为椭圆。辨识结果表明，至少有一部分碎片云的头部形状是旋转抛物面, 而不是椭球面。
- 固体力学 /
- 辨识 /
- 边缘 /
- 头部形状 /
- 图像 /
- 拟合
Abstract: There are various models of the debris cloud produced by normal impact of spherical projectile, but a common ground of the models is that the head shape of the debris cloud is ellipsoidal. In order to identify the head shape of the debris cloud, a new method was presented, which extracts the edge of the debris cloud image, searches for the optimal quadratic function fitting of the edge, and then adjudge the head shape according to fitting results. The optimal fitting algorithm of quadratic function was given as well. Based on four of debris cloud images of references, the recognition was carried out after extraction of their head shape and the optimal quadratic function fitting, and the results show that there are three images with parabolic head shape, one image with elliptic head shape. Thus, the head shape of debris clouds includes not only the rotation ellipsoid, but also the rotation paraboloid.
- solid mechanics /
- recognition /
- edge /
- head shape /
- image /
- fitting

HTML全文

图 1 超高速撞击实验碎片云图

Figure 1. Debris clouds from hypervelocity impact experiments

下载: 全尺寸图片幻灯片

图 2 图像1的抛物线拟合结果

Figure 2. Parabola fitting result of image 1

下载: 全尺寸图片幻灯片

图 3 图像2的椭圆拟合结果

Figure 3. Ellipse fitting result of image 2

下载: 全尺寸图片幻灯片

图 4 图像3的抛物线拟合结果

Figure 4. Parabola fitting result of image 3

下载: 全尺寸图片幻灯片

图 5 图像4的抛物线拟合结果

Figure 5. Parabola fitting result of image 4

下载: 全尺寸图片幻灯片

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