综合测控设备训练仿真系统分析与设计

介绍了基于分布式交互仿真技术对综合测控设备训练进行计算机仿真的分析与设计方法。通过对设备实际图像的优化和分解,实现大型设备高逼真度的“软”模拟操作。在软件设计上运用了Socket技术来解决不同分系统间的数据传输问题。由于采用了标准化和模块化设计思想,系统可以灵活地扩充和移植。     

军机无维修待命时间试飞验证方法研究

以工程应用为出发点,提出了试验机技术状态确定的依据、单次无维修待命时间验证成败判据、特殊气象条件下试验数据处理方法、无维修待命时间验证评估模型.在此基础上,以某型歼击机为例给出了试飞阶段无维修待命时间验证方案设计方法.该方法工程应用性强,可作为试飞阶段外场开展无维修待命时间验证的依据.     

横向剪切干涉检测非球面波前数值模拟

横向剪切干涉检测方法用于非球面加工过程中检测是经济且高效的方法。从数值模拟的角度,分析了基于像差最小原则的非球面度;模拟了非球面波前的横向剪切干涉图,并利用基于Zernike多项式拟合的最小二乘法进行了波前重建数值模拟,给出了数值模拟结果,为该方法的实际应用提供了理论依据。     

武器试验机建设关键技术研究

阐述了武器试验机建设的背景及需求,结合国内外试验机建设经验总结了飞机平台选择、机载火控系统研制、挂装武器飞行性能和机弹分离安全性评估及机载测试测量等试验机建设关键技术,对关键技术提取和具体应用进行了分析并提出了使用原则,明确了主要的指标要求和使用注意事项,以期对相关建设工作起到参考作用.     

面向航空领域数控系统关键技术研发与应用

针对航空领域关键零件的加工特点,在开展高档数控系统高速高精控制、五轴机床校验和优化补偿等关键技术研发基础上,面向航空领域进行国产高档数控系统的应用验证与示范。目前,共完成了20套国产高档数控系统的安装调试,经试切合格后已全部投入正式生产,成功替代了进口系统,实现了国产高档数控系统在航空领域生产应用中的重大突破。     

Acceptance sampling plan of accelerated life testing for lognormal distribution under time-censoring

Lognormal distribution is commonly used in engineering.It is also a life distribution of important research values.For long-life products follow this distribution,it is necessary to apply accelerated testing techniques to product demonstration.This paper describes the development of accelerated life testing sampling plans(ALSPs)for lognormal distribution under time-censoring conditions.ALSPs take both producer and consumer risks into account,and they can be designed to work whether acceleration factor(AF)is known or unknown.When AF is known,life testing is assumed to be conducted under accelerated conditions with time-censoring.The producer and consumer risks are satisfied,and the size of test sample and the size of acceptance number are optimized.Then sensitivity analyses are conducted.When AF is unknown,two or more predetermined levels of accelerated stress are used.The sample sizes and sample proportion allocated to each stress level are optimized.The acceptance constant that satisfies producer and consumer risk is obtained by minimizing the generalized asymptotic variance of the test statistics.Finally,the properties of the two ALSPs(one for known-AF conditions and one for unknownAF conditions)are investigated to show that the proposed method is correct and usable through numerical examples.     

电磁铆接放电过程仿真分析

目前,电磁铆接的放电回路主要有两种形式,一种是电容直接对线圈进行放电;另一种是电容对脉冲变压器放电,然后脉冲变压器作用于线圈.     

基于模拟仿真的机场现场指挥实践教学研究

教学手段与技术的限制是机场现场指挥人才培养面临的重要瓶颈。以虚拟现实技术为基础,通过模拟训练系统的开发、实践教学的改革,建立一套适用于交通运输专业机场现场运行管理方向的实践课程体系,彻底解决长期依赖书本的理论学习,使得机场现场理论知识直接得到实践应用,在加深理论理解的同时锻炼了工作岗位所需技能。     

From geometry to CFD grids—An automated approach for conceptual design

The CEASIOM software developed in the EU-funded collaborative research project SimSAC generates stability and control data for preliminary aircraft design using different methods of varying fidelity. In order to obtain the aerodynamic derivatives by CFD, the aircraft geometry must be defined, computational meshes generated, and numerical parameters set for the flow solvers. An approach to automation of the process is discussed, involving geometry generation and mesh generation for inviscid as well as RANS flow models.     

Measurement of night sky brightness in southern Australia

Night sky brightness is a major source of noise both for Cherenkov telescopes as well as for wide-angle Cherenkov detectors. Therefore, it is important to know the level of night sky brightness at potential sites for future experiments.