基于Choi-Williams分布的侵彻层数识别方法

王燕; 马铁华; 徐鹏; 范锦彪

doi:10.11883/1001-1455(2015)05-0758-05

基于Choi-Williams分布的侵彻层数识别方法

doi: 10.11883/1001-1455(2015)05-0758-05

王燕^{1, 2,},
马铁华^{1, 2},
徐鹏¹,
范锦彪^{1, 2}

1.
中北大学仪器科学与动态测试教育部重点实验室, 山西太原 030051
2.
中北大学计算机与控制工程学院, 山西太原 030051

基金项目: 国家自然科学基金项目(51275488)

详细信息

作者简介:
王燕(1979—), 女, 博士研究生, 讲师, wangyan_zkk@163.com

中图分类号: O382
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- 被引次数: 0
出版历程
- 收稿日期: 2014-03-21
- 修回日期: 2014-10-15
- 刊出日期: 2015-10-10

Identification of penetration layers based on Choi-Williams distribution

Wang Yan^{1, 2
,},
Ma Tie-hua^{1, 2},
Xu Peng¹,
Fan Jin-biao^{1, 2}

1.
Ministry of Education Key Laboratory of Instrumentation Science & Dynamic Measurement, North University of China, Taiyuan 030051, Shanxi, China
2.
School of Computer and Control Engineering, North University of China, Taiyuan 030051, Shanxi, China

摘要

摘要: 针对侵彻多层硬目标过程中实测加速度信号的振荡叠加，以及可能引起的层数误判问题，采用时频分析法研究弹体主轴方向加速度信号的Choi-Williams能量分布特征，提出了以侵彻过程加速度信号的能量分布为依据的层数识别方法。侵彻8层等间距混凝土靶板的实测数据处理结果表明，该方法可快速准确实现层数识别，解决了低通滤波方法无法获取准确层数信息的问题，为实时控制起爆位置提供依据。
- 爆炸力学 /
- 层数识别 /
- Choi-Williams分布 /
- 多层硬目标 /
- 侵彻 /
- 加速度
Abstract: There is an oscillation signal superposition on measured acceleration signals during the process of penetrating multilayer hard targets, which can cause a misjudgement of the target layer number. To overcome the above problem, a time-frequency analysis method was adopted to study the Choi-Williams energy distribution features of the acceleration signals in the directions of projectile main axes. Based on the energy distribution of the acceleration signals during penetration process, a target layer identification method was put forward. The acceleration data were processed, and these data were measured from the penetration of eight concrete slabs with the same thickness by a projectile. The processed results show that the layer identification method put forward can identify the layer number rapidly and accurately. The problem, that the low-pass filtering method can not acquire the accurate layer number, was solved. So the layer identification method put forward can provide basis for the real-time control of initiation positions.
- mechanics of explosion /
- layer identification /
- Choi-Williams distribution /
- multilayer hard target /
- penetration /
- acceleration

HTML全文

图 1 弹体侵彻多层靶板示意图

Figure 1. Diagram of a projectile penetrating multi-layer hard targets

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图 2 弹体有限元模型

Figure 2. The finite element model for the projectile

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图 3 轴向加速度实测曲线

Figure 3. Measured axial acceleration-time history

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图 4 加速度数据频谱图

Figure 4. Frequency spectrum of acceleration

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图 5 加速度滤波后曲线(3 kHz)

Figure 5. Acceleration data filtered with a digital low-pass filter

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图 6 时频谱分析对比

Figure 6. Comparison of time-frequency analysis methods

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图 7 加速度信号的CWD能量分布三维图

Figure 7. Three-dimensional diagram for CWD energy distribution of acceleration signal

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图 8 三轴加速度实测曲线

Figure 8. Measured triaxial acceleration-time histories

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图 9 时间-能量二维分布图

Figure 9. Two-dimensional distribution of time-energy spectrum

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