频率混叠在气体炮内弹道速度测量中的应用

陶天炯; 王翔; 陈宏; 王为; 傅秋卫; 汪晓松

doi:10.11858/gywlxb.2013.04.009

频率混叠在气体炮内弹道速度测量中的应用

doi: 10.11858/gywlxb.2013.04.009

中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室，四川绵阳 621900

详细信息

通讯作者:
陶天炯 E-mail:tjtao@caep.ac.cn

计量
- 文章访问数: 6064
- HTML全文浏览量: 381
- PDF下载量: 277
出版历程
- 收稿日期: 2012-04-14
- 修回日期: 2012-07-17
- 刊出日期: 2013-08-15

Frequency Aliasing Used in Interior Ballistic Velocity Measurements for Gas Guns

National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, China

摘要

摘要: 从采样理论出发，分析频率混叠现象的产生规律及其在时域和频域中的表现形式，获得采样信号频率与原始信号频率的关系，论证了利用频率混叠规律恢复原始信号频率的可行性。采用数值方法模拟理想条件下的频率混叠信号，分析原始信号频率恢复方法。利用激光位移干涉仪和光束遮断法，开展了二级轻气炮内弹道速度的对比测量实验，根据频率混叠规律恢复干涉信号频率，得到的结果与光束遮断法测量结果一致，解决了内弹道长历程、高速测量中记录长度与采样率之间的矛盾。
- 频率混叠 /
- 傅立叶变换 /
- 内弹道 /
- 速度测量
Abstract: The occurrence of frequency aliasing and its representation in time and frequency domain are analyzed with sampling theory. Relationship between the sampled signal and the original signal is calculated and shows that the frequency of the original signal can be recovered by using the rule of frequency aliasing. Ideal sampled signals with frequency aliasing are simulated, and the frequency recovering method is confirmed by numerical simulations. The interior ballistic velocity in a two-stage light gas gun is measured by a laser displacement interferometer and the optical beam break method. The frequency of the laser interference signal recovered by aliasing rules is the same as the frequency obtained from the optical beam break method, which solves the contradiction between the recording length and the sampling frequency in high velocity measurements of long time duration, such as interior ballistic velocity measurement.
- frequency aliasing /
- Fourier transformation /
- interior ballistic /
- velocity measurement

HTML全文

参考文献(14)

Yang M T. Applications of microwave interferometer in the arms research [J]. Gun Launch Control Journal, 1996(4): 23-27. (in Chinese)

杨敏涛. 微波干涉仪在武器研制中的应用 [J]. 火炮发射与控制学报, 1996(4): 23-27.

Ma L, Cai Z Y, Cheng F L, et al. The principle of microwave velocity radar [J]. Journal of Ballistics, 2003, 15(4): 87-91. (in Chinese)

马玲, 蔡征宇, 程风雷, 等. 毫米波测速雷达的测速原理 [J]. 弹道学报, 2003, 15(4): 87-91.

Barker L M, Hollenbach R E. Laser interferometer for measuring high velocities of any reflecting surface [J]. J Appl Phys, 1972, 43(11): 4669-4675.

Weng J D, Wang X, Ma Y, et al. A compact all-fiber displacement interferometer for measuring the foil velocity driven by laser [J]. Rev Sci Instrum, 2008, 79(11): 113101.

Strand O T, Goosman D R, Martinez C, et al. Compact system for high-speed velocimetry using heterodyne techniques [J]. Rev Sci Instrum, 2006, 77(8): 083108.

Wang D T, Peng Q X, Liu J, et al. Application of laser velocity interferometry in interior ballistic projectile velocity measurement [J]. Chinese Journal of High Pressure Physics, 2011, 25(2): 133-137. (in Chinese)

王德田, 彭其先, 刘俊, 等. 激光干涉测速技术在内弹道弹丸速度测量中的应用研究 [J]. 高压物理学报, 2011, 25(2): 133-137.

Oppenheim A V, Schafer R W, Buck J R. Discrete-Time Signal Processing [M]. New Jersey, USA: Prentice Hall, 1999.

Oppenheim A V, Willsky A S, Nawab S H. Signals and System [M]. New Jersey, USA: Prentice Hall, 1997.

Brigham E O. Fast Fourier Transform and Its Applications [M]. New Jersey, USA: Prentice Hall, 1988.

Wang W, Chen H, Wang X. Compact all fiber interior ballistic projectile velocity measurement system [J]. Journal of Applied Optics, 2011, 32(4): 723-729. (in Chinese)

王为, 陈宏, 王翔. 紧凑型全光纤内弹道弹速测量系统 [J]. 应用光学, 2011, 32(4): 723-729.

施引文献

资源附件(0)

访问统计