数字式航空电子信息系统(DAIS)在实验室中运行

美国空军现正通过美国俄亥俄州台东的赖特——帕特森空军基地管理的数字式航空电子信息系统(DAIS),来建立未来系统的标准结构。DAIS系统实验室和设置了西屋公司的AN/AYK-15计算机和休斯公司的全息摄影显示设备,供四种模拟的设备系列来使用。     

解析美国机载计算机的“三化”道路

通过介绍美国海军的标准机载计算机的发展历史,讨论美国空军的航空电子系统模块化体系,以及展现美国机载计算机的“三化”历程和美国先进机载计算机的“三化”情况,剖析了美国机载计算机实施“三化”的策略,揭示出了美国机载计算机标准化的内容和发展的轨迹。     

下一代机载计算机结构

下一代机载计算机结构的发展方向是模块化结构。本文介绍了模块化机载计算机的模块结构和安装箱结构，并给出了这种结构所带来的特性及优点。     

机载32位计算机指令系统结构军标分析

随着国际形势的缓和,美国国防工业及半导体制造业发生着微妙的变化,于是美国防部果断地提出军杯改革。面对这种情况,国内机载计算机造型、指令系统结构标准的制定和选择目前变成一个热门话题。本文介绍了几种典型的32位计算机指令系统结构标准和美国此方面的应用现状和特点,给出了机载计算机指令系统结构标准确定的可行性与途径。     

机载计算机电源模块的研制

本文介绍了某机载计算机电源模块原理样机的研制情况。该电源由机上400芝115伏交流电源供电,采用单端正激式 DC-DC 转换电路,获得计算机所需的各种直流电压,线路中采用国外先进技术如新器件,工作频率100千赫电源效率80%。     

机载大屏幕显示器人机工效及其标准初探

分析了国内外机载大屏幕显示器人机工效发展现状,介绍了机载大屏幕显示器人机工效的关键技术,简述了国内外标准发展情况,提出了制定我国机载大屏幕显示器人机工效标准的建议。     

机载电子设备面向CNS／ATM系统的进展

国际民航组织（ICAO）推荐的新航行系统，即CNS／ATM系统，在全球范围内已逐步实施，其通信、导航、监视、空中交通管理各方面影响着机载是民子设备的相应发展。在标准经问题上ARINC制订了一系列文件，包括总体功能、推荐结构、设计思想以及各部件的规范和先行标准。引申其有关的重要概念，反映了本世纪初机载电子设备面向CNS／ATM系统发展的概貌。     

军用机载计算机技术预研动态

航空航天部第六三一研究所将开展“机载三十二位标准计算机研制”和“机载高速计算机研制”。机载三十二位标准计算机研制是在“七·五”已经研制出的“机载十六位标准计算机”的基础上,研制出主要用于下一代更先进的歼击机航空电子系统中的三十二位标准计算机。该机依然采用标准化、模块化结构,主要由中央处理器模块,存储器模块,多路总线接口模块,标准输入/输出模块,电源模块等组成。技术指标大大超出了现研制的十六位军标计算     

机载计算机标准机箱

前言本文所介绍的标准机箱是专门为机载计算机及其它电子设备研制的加固型机载计算机标准机箱。它除了满足电气方面的技术要求之外,采用了体积小、重量轻的高密度组装结构,并朝着广泛应用在严酷飞行条件的各种类型的机载计算机及其它电子设备上的目标努力。     

基于PXI总线的机载计算机通用测试系统的设计和实现

以通用机载计算机的维护和测试为目标,采用目前国际测控领域流行的PXI总线结构和LabWindows／CVI虚拟仪器软件开发平台,设计和实现了机载计算机通用测试设备。本文在介绍PXI总线结构的基础上,重点介绍了该测试设备的软／硬件组成、系统功能和特点。     

The Whirlwind computer project

The authors describe how they led the development of the Whirlwind I (WWI) digital computer and its evolution into the SAGE (Semi-Automatic Ground Environment) air-defense system for North America. The project from 1945 through 1956, beginning at a time when no general-purpose, high-speed, electronic computer existed, was from the start dedicated to performance and reliability suitable for real-time control. After several shifts in objectives, Whirlwind became an experimental system for demonstrating that a digital computer could analyze the flow of radar data and generate control orders for fighter-plane interceptions of bombers. The resulting successor computers, the AN/FSQ-7, were installed in a network across the United States and Canada in the late 1950s. The SAGE System control centers were in operation about 25 years and demonstrated a 99.8% up-time reliability. In the Whirlwind Project, vacuum tube life was raised from 500 hours to 500000 hours, marginal checking allowed the automatic detection of aging and drifting of electronic components before they reached the point of failure, random-access magnetic-core storage was invented and developed to become the industry standard computer memory for more than two decades, synchronous parallel logic was used, computer-driven cathode-ray tube displays were used for the first time, light guns were used to permit an operator to identify displayed images to the computer for action, and multiple displays were time-shared between different operators     

基于VPX标准的双路“龙芯”3A计算机模块设计

VPX是一种开放的总线形式,与国产化CPU（中央处理器）结合实现VPX计算机模块是一种新的应用需求.针对这种需求对VPX总线标准及国产的“龙芯”3A芯片进行研究,从原理上结合二者特点,再利用高速高密度布线方式,以欧卡6U的标准设计完成了基于VPX的国产化计算机模块.对模块的功能和性能分别进行测试,分析可得,模块化方式的计算机和普通计算机在主板的性能和功能上表现一致,而且可直接用于具有抗震加固特性的机箱,更适用于未来的军事应用.     

Experimental Results of the Complex Indicated Angle Techique for Multipath Correction

The complex indicated angle technique, applicable to monopulse radars, is being investigated as a means of overcoming the serious degradation of elevation measurement caused by multipath when the target is within a beamwidth or so of the horizon. This technique makes use of the quadrature-phase component of the normalized difference signal, as well as the in-phase component. Results of analysis and computer simulation have been published previously. This paper reports results of a test program using a slightly modified AN/FPS-16 monopulse tracking radar and a simulated target. The results to date indicate a potential for high accuracy, though there are limitations as to the applications for which the technique appears feasible. A computer program has been developed to perform the elevation estimate and to resolve ambiguities.     

GAP/AN推进剂安全性能研究

利用冲击感度和摩擦感度测试研究了聚叠氮缩水甘油醚／硝酸铵（ＧＡＰ／ＡＮ）推进剂及其常用组分的安全性能,指出了影响ＧＡＰ／ＡＮ推进剂冲击感度和摩擦感度的主要因素为硝酸酯（ＢＴＴＮ／ＮＧ）,ＡＰ,ＨＭＸ等添加剂。硝酸铵具有非常低的冲击感度和摩擦感度,是理想的低易损性推进剂的氧化剂。硝酸酯增塑的ＧＡＰ／ＡＮ推进剂不仅具有较高的能量,而且安全性能显著优于ＧＡＰ／ＡＰ,ＧＡＰ／ＨＭＸ,ＧＡＰ／ＨＮＦ推进剂。     

GAP/AN推进剂燃烧波温度分布研究

利用先进的双钨铼微热电偶技术, 研究了ＧＡＰ／ＡＮ 推进剂的燃烧波温度分布。ＧＡＰ／ＡＮ推进剂的燃烧波可以分为凝聚相反应区、暗区、气相反应区。硝酸酯ＢＧ及高氯酸铵对ＧＡＰ／ＡＮ 推进剂的燃烧波结构有显著的影响,硝酸酯ＢＧ导致推进剂的燃速降低,压强指数升高;高氯酸铵的影响恰好相反。凝聚相反应的温度梯度及暗区厚度是影响推进剂燃速及压强指数的主要因素。     

Optimal Resolution of Rectangular Pulses in Noise

Optimal detection of rectangular pulses in noise is considered, subject to a sidelobe constraint which ensures adequate resolution capabilities, and a new sidelobe reduction filter is derived. Tests in the laboratory and on a Westinghouse AN/TPS-27 search radar system em indicate that use of the new filter substantially improves both resolution and clutter performance over such standard techniques as fast time constant (FTC), delay line differentiator (DLD), and pulse length discriminator (PLD).     

基于计算机图形学的仿真系统设计与分析

针对工程中的计算机实体仿真需要，为满足各种工程领域具体仿真对象仿真设计和实验的要求，应用计算机图形学原理，采用高级编程语言提出进行计算机仿真系统软件设计的思想和方法，论述这种仿真系统中几何信息、功能信息、实体模型、特征模型所具有的功能以及各程序模块的作用及建立方法，并给出程序设计的主要流程图。     

Sole means navigation in US Navy aircraft

The current edition of the US Federal Radionavigation Plan, issued in 1984, presents a consolidated federal plane on the management of those radionavigation systems which are used by both the civilian and military sectors. It states the US Dept. of Defense (DoD) goal to phase out the use of TACAN, VOR/DME, OMEGA, LORAN C, and TRANSIT in military platforms and for Global Positioning System (GPS) to become the standard radionavigation system for DoD. This would eliminate all the current sole-means air navigation systems (TACAN and VOR/DME) aboard military aircraft. Instrument Flight Rule (IFR) operations within controlled airspace requires an operating sole-means air navigation system to be aboard the aircraft. The authors investigate the requirements for GPS certification as a sole means air navigation system in the US National Airspace System (NAS); discuss the implication for GPS user equipment (UE) hardware and software; describe the actual UE implementation; and discuss approaches for UE integration with flight instruments on US Navy aircraft     

EFIS和EICAS显示系统的计算仿真

本文用 BASIC 语言在微机上实现 EFIS 和 EICAS 的电子仪表的图象、数值显示,并提出了与实际系统连接的方案。