地空导弹系统维修体制优化研究

介绍了国外地空导弹系统维修体制的演变过程,分析了我国地空导弹系统维修体制的现状与存在的不足,提出了建立两级维修体制的优化方案,并重点讨论了两级维修的关键设计技术。     

基于SA-WPSO的遥感图像校正方法

提出一种基于SA-WPSO的遥感图像校正方法。该方法利用多项式模型对图像进行初步几何校正,得到多项式校正系数后,将模拟退火(SA)思想引入粒子群优化(PSO)算法,通过改进的SA-WPSO算法优化多项式校正系数,在此基础上实现图像的几何校正。实验结果证明,与二次多项式及三次多项式校正方法相比,该方法的校正精度更高、鲁棒性更好。     

异类传感器实时信息融合的STMHM算法

异类传感器实时信息融合由于两类设备的数据率不同和数据误差的限制,一直未得到有效解决,提出一种空时二维多假设模型(STMHM)算法来解决该问题。设计的融合数据模型,将异类传感器的测量数据映射在二维直角坐标系下;按照新的融合数据模型分别构建两类传感器的目标量测空间和融合空间;设计量测空间时间初始化方法和目标实体空间的滤波算法;通过仿真验证表明:该算法能够实现异类传感器的信息融合,初次融合成功的确认时间在3～5个主动传感器扫描周期。     

测试技术与军机维修体制变革

近年来，随着测试技术飞速发展及其在航空领域的应用，特别是ATE和BIT技术的日益成熟，测试设备性能逐步提高，使军机维修工作有了很大变化。同时军机维修体制的变革也不断进行，其中两级维修的实现即为一项重大进步，从美军F-22和F-35飞机成功实施两级维修可知，维修体制变革与测试技术的发展分不开．     

ATE通用平台研究

在对国内外ATE(自动测试设备)通用平台的发展历程进行综述的基础上,参考国外设计较为成功的通用自动测试设备,分析了国内ATE存在的问题,阐明了研究ATE通用平台的必要性,介绍了通用性设计的原则,并重点讨论了ATE通用平台的关键技术。     

Experimental investigation on plasma jet deflection with magnetic fluid control based on PIV measurement

This paper is devoted to experimentally investigating the influence of magnetic field intensity and gas temperature on the plasma jet deflection controlled by magneto hydrodynamics. The catalytic ionization seed CS_2CO_3 is injected into combustion gas by artificial forced ionization to obtain plasma fluid on a high-temperature magnetic fluid experimental platform. The plasma jet was deflected under the effect of an external magnetic field, forming a thrust-vector effect.Magnesium oxide was selected as a tracer particle, and a two-dimensional image of the jet flow field was collected using the particle image velocimetry(PIV) measurement method. Through image processing and velocity vector analysis of the flow field, the value of the jet deflection angle was obtained quantitatively to evaluate the thrust-vector effect. The variation of the jet deflection angle with the magnetic field intensity and gas temperature was studied under different experimental conditions. Experimental results show that the jet deflection angle increased gradually with a rise in gas temperature and then increased substantially when the gas temperature exceeded 2300 K. The jet deflection angle also increased with an increase in magnetic induction intensity. Experiments demonstrate it is feasible to use PIV test technology to study the thrust vector under magnetic control conditions.