涡流电导率法检测飞机结构烧伤的试验研究

基于某烧伤战机的实际检测需要，选用LC4CS及LY12CZ铝合金为试验材料进行烧伤模拟试验，对材料在不同温度下的力学性能与电导率的关系进行了分析。试验结果表明，热处理强化后的铝合金受热损伤之后，强度和电导率随温度不同都有突变现象，二者温度变化区间接近，且电导率的变化稍微超前，因此，用电导率检测法来界定烧伤范围和烧伤程度比硬度检测法更安全。应用结果表明，涡流电导率法可以准确、快速确定飞机结构热损伤的范围和程度，能够为烧伤战机的抢修提供可靠的理论依据，对构件不会造成任何破坏，成本低、效率高，这对于飞机修理厂修理热损伤构件有着广泛的应用前景。     

长波定时ASF修正的GIS软件

论述的长波定时ASF修正的GIS软件能快速数字化可视化显示和调用服务区域的地形地理信息、大地电参数和大气折射率等多种数据源。使用此软件可以非常方便容易地用不同模型计算在广阔区域接收到的多个长波信号在各种典型路径上的ASF和地波传播时间延迟,并提高定时精度。     

Ground experimental investigations into an ejected spray cooling system for space closed-loop application

Spray cooling has proved its superior heat transfer performance in removing high heat flux for ground applications.However,the dissipation of vapor–liquid mixture from the heat surface and the closed-loop circulation of the coolant are two challenges in reduced or zero gravity space environments.In this paper,an ejected spray cooling system for space closed-loop application was proposed and the negative pressure in the ejected condenser chamber was applied to sucking the two-phase mixture from the spray chamber.Its ground experimental setup was built and experimental investigations on the smooth circle heat surface with a diameter of 5 mm were conducted with distilled water as the coolant spraying from a nozzle of 0.51 mm orifice diameter at the inlet temperatures of 69.2 °C and 78.2 °C under the conditions of heat flux ranging from 69.76 W/cm~2 to 311.45 W/cm~2,volume flow through the spray nozzle varying from 11.22 L/h to 15.76 L/h.Work performance of the spray nozzle and heat transfer performance of the spray cooling system were analyzed;results show that this ejected spray cooling system has a good heat transfer performance and provides valid foundation for space closed-loop application in the near future.     

多载荷卫星高速信息处理技术研究

在某多载荷卫星数传分系统的信息处理器中，用高级在轨系统(AOS)的部分业务及功能，实现多种信息的交织、合路、纠错、数据传输和数据管理。将解扰和R-S译码2种关键技术，用于信息处理器地面测试系统的信息传输和处理，并设计为IP核，实现了与其他模块的无缝连接。在数据流仿真和高速数据接收中采用了通用化设计，提高了设计效率，减少了设计成本和时间。     

一种频分制遥测系统的设计与研制

介绍了某战斗弹上所用的频分制遥测系统。对该系统的遥测参数及遥测系统主要指标进行了分析，并介绍了研制中解决的主要关键技术问题     

一个地空导弹武器系统干扰环境数字仿真器的设计

分析了在现代战争环境下，地空导弹武器系统面临的干扰环境；提出了地空导弹武器系统干扰环境数字仿真器的设计方案和功能构成，探讨了仿真器设计中的一些技术问题，并依此用Ｃ语言实现了一个干扰环境仿真器的设计。     

Continuum Model for Space Debris Evolution with Account of Collisions and Orbital Breakups

The paper discusses the mathematical modeling of long-term orbital debris evolution taking into account mutual collisions of space debris particles of different sizes. Investigations and long-term forecasts of orbital debris environment evolution in low Earth orbits are essential for future space mission hazard evaluation and for adopting rational space policies and mitigation measures. The paper introduces a new approach to space debris evolution mathematical modeling based on continuum mechanics incorporating partial differential equations. This is an alternative to the traditional approaches of celestial mechanics incorporating ordinary differential equations to model fragments evolution. The continuum approach to orbital debris evolution modeling has essential advantages for describing the evolution of a large number of particles, because it replaces the traditional tracking of space objects by modeling the evolution of their density of distribution.     

从美国民兵导弹制导精度鉴定的发展过程论我国制导精度鉴定的道路

本文对美国民兵系列导弹(民兵Ⅰ、民兵Ⅱ、民兵Ⅲ)的飞行试验和制导精度鉴定发展演变的全过程,作了全面综合分析,由此探讨了我国第二代战略远程导弹制导精度鉴定的技术途径。     

卫星全景图象的数字几何校正

文中提出了一种对卫星全景图象进行整幅几何粗处理的方法。该方法基于卫片和地面上一些固有的几何关系,既考虑卫星成像的物理过程,又不单纯依赖卫星参数,而是借助于精确测定的少量地标点和几何关系模型,对参数进行最优估计,最终达到对图象的校正。经仿真表明,文中所提出的方法是完全有效的。