共查询到20条相似文献,搜索用时 93 毫秒
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雷达导引头是空空导弹的核心部件,实现导弹探测、制导和控制等功能,其性能的优劣直接影响着导弹跟踪和截获目标的准确率。为了全面测试空空导弹雷达导引头,设计开发了一种基于CPCI总线的雷达导引头测试系统,并完成了软硬件设计。硬件部分完成了调理电路的设计、外设的搭建以及硬件电路方面的可靠性设计;软件部分协调控制雷达导引头、角位置模拟器、回波模拟器和转台,通过部件之间数据流的传输,完成了各个模块的测试功能。该系统能够真实模拟雷达导引头的工作环境,设置导引头参数,接收处理导引头发回的信息,进而测试雷达导引头的精度、灵敏度、可靠性等指标。实际应用表明,该系统工作性能良好,可靠性高,能够长期稳定运行,达到了设计要求。 相似文献
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激光制导、微波制导的导引头由于不具备可视化功能,在实际环境中进行性能考核时,导引头是否成功截获指定目标、截获目标后的稳定跟踪过程是否正常以及在稳定跟踪过程中出现的问题都不易得到及时、准确的定位和分析。文中设计的可视化评估系统可有效解决上述问题,通过加装可见光成像系统同步伴随导引头运动的方法,将导引头搜索、跟踪目标的过程清晰成像,直观显示导引头的整个工作过程,同时利用图像跟踪系统和图像存储系统保存关键性能参数,试验完成后对导引头的输出参数及跟踪性能进行验证及处理,进而对导引头的性能参数进行分析和评估;通过动态跟踪或加载干扰源试验验证,该方法能利用可视化系统可靠同步跟随不可视导引头的运动,并对导引头跟踪过程进行定性观察及定量分析。该方法不仅可以克服室内仿真环境不太真实的缺点,又可进行多次重复性研究,性价比高,为导引头性能评估提供一种比较适用的研究手段。 相似文献
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针对某型导引头挂飞试验实现导引头控制及实时性高的需求,设计了一种基于LabWindows/CVI软件开发平台的挂飞控制箱系统。该挂飞控制箱通过RS422串口与导引头相连,能够实现导引头控制、状态显示、GPS信息接收处理、试验数据存储等功能。挂飞控制箱采用VXI总线和LabWindows/CVI软件平台进行设计,硬件集成度较高,软件运用LabWindows/CVI开发平台自带的多线程技术,将串口通讯等周期性任务与数据处理、存储、显示等任务从时间上分开,提高了CPU工作效率,满足系统实时性要求。试验结果表明,该挂飞控制箱系统工作稳定,与导引头通讯可靠,实时性较高,试验数据完整且满足总体要求。 相似文献
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某型激光导引头光电系统建模与测试方法研究 总被引:3,自引:0,他引:3
建立了激光导引头跟踪回路的数学模型,根据实际情况设计了仿真系统环境,提出了一个易于实现的可靠的激光导引头静态测试和动态测试的仿真系统方案以及在全弹道仿真条件下验证导引头数学模型准确度的仿真方案。目前该系统已经成功应用于某型激光制导武器的半实物仿真。 相似文献
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本文描述CO激发器的发展及潜在应用。叙述工业用预冷气流激光器,气动激光器和外科用水冷管式激光器。概述三种类型的预电离TEA CO激光器及电子束控制CO激光器。最后介绍CO激光器选用的贵金属催化剂。 相似文献
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In this paper, the laser spot diameter and its intensity distribution are measured with a scanning pinhole, and the keyhole shapes are observed using a specially designed setup in laser deep penetration welding of glass GG17. Based on the above experimental results, the effects of the following factors on the keyhole shapes are studied: the laser spot diameter and its intensity distribution, defocus, welding speed and inverse Bremsstrahlung absorption of the plasma. 相似文献
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The results of an experimental study of the parameters of acoustic radiation generated by a laser spark made by focusing of a CO2 high-power pulsed laser radiation outdoors in a slightly dusty atmosphere are presented. An analysis of the acoustic pulse spectrum shows that the position of its maximum is determined by the local plasma-formation radius, and the position of its low-frequency minimum is determined by the laser spark length. A new method of laser spark diagnostics in real time is suggested that enables one to estimate the plasma-formation size distribution function and the transmission factor for laser radiation propagated in the atmosphere under conditions of laser breakdown. The results obtained are in agreement with the available experimental data. 相似文献
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K. Yuyama T. Sugiyama T. Asahi S. Ryo I. Oh H. Masuhara 《Applied Physics A: Materials Science & Processing》2010,101(4):591-596
Quinacridone nanoparticles with a mean size of about 200 nm are successfully prepared using nanosecond near-infrared (NIR)
laser ablation of its microcrystalline powders in heavy water. The absorption spectra of the formed colloidal solutions depend
on the excitation wavelengths, which is eventually ascribed to number and energy of absorbed photons. β-carotene has low photostability and is easily decomposed upon UV/VIS laser ablation of its solid, while its nanoparticles
are prepared utilizing this NIR laser ablation technique. The advantage of nanoparticle preparation by NIR laser ablation
is discussed. 相似文献
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M. M. El-Nicklawy M. A. Kenawy M. M. H. Elnaby A. F. Hassan A. A. Hemida 《Czechoslovak Journal of Physics》1989,39(9):998-1006
The formulas of the dependence of the spectral laser power distribution and its spectral half-width on the physical parameters of its laser active medium are derived. In addition it is found that, if the gain line profile has a Lorentzian or Gaussian distribution, the spectral laser power distribution is of a Lorentzian profile. The spectral halfwidth of the laser beam in both cases are slightly different form each other. For a general gain line profile, the spectral laser power distribution behaves as a differential form like that of the gain line profile.The spectral halfwidth of He/Ne laser beam having powers (0·5 mW, 1·0 mW, 3·0 mW and 50 mW) and that of their longitudinal modes, the laser gain factor and the difference between the population atomic densities of the upper and lower energy levels for the laser line transition are experimentally determined. 相似文献
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简要概述了半导体泵浦碱金属激光器(DPAL)的产生背景与独特优势,以其特性为基础、应用为导向,基于国内外最新进展分析了谱线匹配、连续稳定运转和提高输出功率这三大问题,并对新型复合受激态准分子宽带泵浦碱金属激光器(XPAL)的基本原理及优缺点进行了阐述。通过对碱金属激光器现有解决思路进行对比和总结,在能级理论和缓冲气体作用机理、泵浦机理和腔结构以及高功率定标放大等方面,对未来可能的研究方向进行了展望,以期突破DPAL相关技术瓶颈,实现高能量高光束质量的红外激光输出。 相似文献