冲击波测试系统的动态建模及应用

尤文斌; 马铁华; 丁永红; 崔敏; 张晋业

doi:10.11858/gywlxb.2014.04.007

冲击波测试系统的动态建模及应用

doi: 10.11858/gywlxb.2014.04.007

1.
中北大学电子测试技术重点实验室，山西太原 030051
2.
晋西工业集团有限责任公司技术中心，山西太原 030027

基金项目: 山西省青年科技研究基金(2013021015-1);国防科技重点实验室基金(9140C120409)

详细信息

作者简介:
尤文斌(1981-), 男, 博士, 讲师, 主要从事动态测试与智能仪器研究.E-mail:youwenbin@nuc.edu.cn

中图分类号: O521.3;O384
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出版历程
- 收稿日期: 2012-07-19
- 修回日期: 2012-09-29

Dynamic Modeling and Application of Shock Wave Testing System

1.
Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, China
2.
Technology Center, Jinxi Industries Group Co., Ltd, Taiyuan 030027, China

摘要

摘要: 若测试系统的带宽不能完全覆盖冲击波信号的有效带宽，就会存在较大的动态误差。根据冲击波测试系统的激波管动态校准实验数据，建立了冲击波测试系统动态数学模型，设计了动态校正数字滤波器。仿真结果表明，动态校正滤波器明显提高了系统动态响应的快速性，展宽了工作频带。实弹测试结果显示，校正滤波器能提高冲击波测试的精度和可靠性。该方法能有效消除动态误差，提高测试数据的准确性。
- 动态建模 /
- 补偿滤波 /
- 冲击波测试 /
- 带宽
Abstract: If the bandwidth of measurement system can not cover completely the effective bandwidth of a blast wave signal, a dynamic error is inevitably introduced.By using the shock-tube based dynamic calibrated data, a dynamic mathematical model of measurement system is established, and a dynamic compensated digital filter is designed, which shortens the dynamic response time of test system and widens the work bandwidth significantly.The experimental data processing by the correction filter improves the reliability of the uncertainty.The simulation results show that this method can effectively eliminate the dynamic error and increase the accuracy of test data.
- dynamic modeling /
- compensation filter /
- shock wave test /
- bandwidth

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图 1 激波管示意图

Figure 1. Schematic of shock tube

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图 2 标定曲线

Figure 2. Calibration curve

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图 3 标定曲线的幅频特性

Figure 3. Amplitude frequency characteristic of calibration curve

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图 4 仿真结果与实测数据的对比

Figure 4. Comparison between the simulation results and measured data

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图 5 仿真模型的频率特性

Figure 5. Frequency response of the simulation model

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图 6 校正前、后的阶跃响应

Figure 6. Step response before and after correction

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图 7 校正前、后测试系统的幅频特性

Figure 7. Frequency response of test system before and after correction

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图 8 校正后的测试数据

Figure 8. Modified test data

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图 9 校正后测试数据的局部放大

Figure 9. Partial enlarged detail of modified test data

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表 1 冲击超压结果统计

Table 1. Statistical table of shock overpressure

S/(m)	p_{max, or}/(kPa)	p_{max, cor}/(kPa)	w_{TNT, or}/(kg)	w_{TNT, cor}/(kg)
15.0	153.1	144.3	112.0	102.2
22.9	70.3	67.5	110.3	102.6
27.5	51.0	49.8	106.0	101.4
29.6	45.3	44.5	105.2	101.9
34.3	35.9	34.9	103.3	101.6

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