Study of ADS-B Data Evaluation

In western China, the terrain and meteorological conditions are so complex that it is not suitable to construct new radar stations. Automatic dependent surveillance-broadcast (ADS-B) is a totally new surveillance method, so before practically applied and operated in China, abundant tests and evaluations are necessary to validate the performance of ADS-B and guarantee the operational security. During the flight tests, we collect the data of radar, ADS-B and high accuracy position and compare the performance of ADS-B with radar based on high accuracy position. To solve the asynchronous problem among radar data, ADS-B data and real-time kinematic (RTK) data caused by different update rates, this article proposes the technique of synchronizing multi-surveillance data by extrapolating from the data of low update rate to high update rate according to velocity and heading. Meanwhile, because radar data, ADS-B data and RTK data are expressed in different coordinates and cannot be compared each other, this article provides a method to unifying the coordinates of multi-surveillance data. By the analysis and evaluation, we can conclude that the performance of ADS-B is better than radar.     

一种基于主成分分析法的发动机性能评估方法

为了能对发动机机队的性能进行视情维修管理和实时排序,利用多属性风险决策方法对高位空间进行降维处理,并根据性能参数中蕴含的客观信息建立主成分分析方法的综合模型。由该方法得出的综合指数可判断发动机的相对性能,为发动机性能评估提供依据。     

航空企业动态联盟任务分解评估方法研究

分析了与航空企业相关的动态联盟的特点,得出了任务分解原则,在假定任务分解过程是一个具有模糊主观判断的多目标决策问题的基础上建立了相应的任务模型.基于创建的任务分解评价指标体系,提出了对任务分解进行评估的一种算法,以此对任务分解的不同方案进行评估.     

基于GIS的雷达网抗干扰效能评估系统设计

针对以往雷达网抗干扰效能评估不具有直观性、脱离战场地形环境的缺点,设计了一种基于GIS的雷达网抗干扰效能评估系统,实现了可视化的雷达网抗干扰效能评估。仿真应用表明,此系统具有较高的推广和实际应用价值。     

基于灰色AHP的海军要地防空预警效能评估

针对海军要地防空预警效能评估,建立了海军要地防空预警能力评估指标体系,综合运用层次分析和灰色理论方法建立了解析模型,最后通过一个实例的计算证明了该方法的有效性.     

基于可测试指标集合的导引头性能评估方法

文章提出了一种采用雷达导引头单元测试指标构建评估指标体系、综合运用层次分析法和模糊综合评估法的导引头性能评估方法.以某型导弹导引头为评估对象,采用该文提出的评估方法对其进行了性能评估.     

Research on influence of typical microstructure characteristics of Ni base single crystal on creep rupture and deformation analysis of turbo blade

Considering the influence of typical microstructure characteristics on creep performance,a series of UM-F single crystal alloys which had similar element components but different microstructures were used to analyze the relationship between creep life and microstructure characteristics of Ni base single crystal.Three main factors were proposed:misfit,volume fraction of precipitate and maximum matrix channel width.The Microstate parameter Ymicro was established to estimate the deformation state of the materials.The linear relationship between the initial value of microstate parameter Y0 and creep life under a certain temperature/load was affirmed.By analyzing the high temperature region of turbo blade using the material parameters of DD 3,the creep deformation and the life prediction of the critical points of blade were obtained and the result closed to the test.     

基于飞行测量的弹性轴承试验载荷谱修正和寿命评估方法

球柔性旋翼系统在我国自主设计的直升机上获得了广泛的应用，弹性轴承在其中承担着重要角色，它提供了旋翼旋转过程中桨叶的挥舞、摆振和扭转运动，传递了旋转产生的离心力、挥舞方向的升力和摆振方向扭矩产生的切向力。文章讨论了不同设计阶段弹性轴承载荷谱的获得，基于飞行载荷测量的弹性轴承载荷谱修正，不同载荷谱对弹性轴承损伤影响的等效分析方法和弹性轴承寿命评估。     

丝厂生丝质量模糊聚类分析

本文采用模糊聚类分析方法对五家丝厂的生丝质量进行聚类分析、结合计算机的使用，探索综合评估生丝质量的方法。     

直升机复合材料结构试验与分析一致性技术的应用研究

本文主要进行了一致性评判技术在直升机复合材料结构试验与分析中的应用研究。对复合材料典型结构件,本文先进行了有限元建模及分析计算;然后进行了相应的强度试验并得出试验结果。通过对位移计算结果和试验结果的对比分析,本文对其进行了一致性模糊综合证券,从而验证了该评判方法的有效性。