燃气轮机系统仿真集成概念及其分布对象实现

本文提出燃气轮机系统仿真集成的概念, 分析了关键实现技术, 然后从跨平台性入手, 给出 1个分布异构计算机平台上的面向对象实现方案。算例表明, 这一方案成功实现了系统仿真集成的主要功能, 从而为发动机系统的多学科开发、研制和实验提供了有效的仿真软、硬件平台, 并使发动机的远程协同设计成为可能。      

异构数据库集成的研究与实现

对异构数据库集成做了详细的研究并提出了具体的实现方法。通过分析比较了目前已有的集成方案,本文提出集成异构数据库可以有四个步骤,分别是用控制表变化法提取有效数据、用XML定义传输数据格式、用JMS传输数据、用全局数据模式集成数据来实现。     

高可靠航电文件系统浏览技术研究

利用远程系统浏览技术,研究并实现了一种基于Reliance的高可靠航电文件系统的远程浏览系统。系统采用客户端／服务器架构,通过在综合化航电系统内核中建立一个嵌入式文件服务器,可使得用户通过集成在E—clipseIDE中的远程文件浏览器客户端,对此文件系统进行访问、浏览和管理。系统能够有效地提高远程文件操作的可视性和透明性,功能丰富,操作简便,可移植性好,易于扩展。     

基于WEB的物资供应系统的设计与实现

论文分析了物资供应系统 ,研究了基于Browser/Server三层体系结构的系统实现方案 ,利用ASP技术对物资供应系统进行了三层应用程序开发 ,具体提出了客户端实现方案、业务逻辑实现方案以及数据库实现方案     

跨数据库平台应用系统移植中间件的研究与开发

软件业对跨数据库平台应用系统移植的需求日益增多,跨数据库平台应用移植的中间件成为一个重点研究方向.本文通过研究异构数据库之间的差异,以及异构数据库间相同的语义对象的转化,语义集成,完成对数据库操作语言对象化的转换.使应用软件对异构数据库的操作透明,实现应用软件在这异构数据库上的移植.     

模型实时驱动的航空发动机沉浸式虚拟运行系统

为实现多学科信息的融合与沉浸式表达,针对当前虚拟现实技术在航空发动机领域的应用存在多学科信息综合表达不 足、仿真实时性低等问题,开发了一种跨学科异构模型集成仿真的航空发动机沉浸式虚拟运行系统。在信息融合与实时交互方 面,研究航空发动机气动热力性能实时仿真、实时控制、参数化结构建模与仿真、数据实时共享与多学科联合仿真集成等技术,实 现了模型实时驱动的航空发动机虚拟运行功能;在数据可视化及3维渲染方面,研究结构数据轻量化处理技术、实时渲染优化技 术,对温度、压力等流场数据进行实时映射,实现了逼真、流畅的沉浸式实时渲染效果。基于上述研究工作,在中国首次开发了1 套由模型实时驱动、跨学科数据集成的航空发动机沉浸式虚拟运行系统,结果表明：该系统实现了发动机结构、系统和性能模型数 据的关联与交互。相关技术和成果可用于协同设计、沉浸式评审、虚拟培训等场景,为未来实现数字孪生、虚实融合的数字发动机 研发提供关键技术支撑和参考。     

网络化通用自动控制系统设计

介绍了一种网络化条件下能够通用于多种设备的的自动控制系统.该系统采用了蓝牙技术、异构数据库集成技术、瘦终端技术和CORBA技术等无线技术和网络技术,实现了自动控制系统与生产设备无关的特性,具有了传统的自动控制系统所不具有的通用性和超前性.首先介绍了通用自动控制系统设计的大致结构和技术基础;然后介绍了系统的构建和众多优点,最后对系统广阔的应用前景作了展望.     

即插即用武器集成及其相关标准体系初探

分析了悬挂物管理系统武器集成的现状,研究了支持即插即用武器集成互用性标准的技术体系,提出了我国飞机武器系统集成的实施步骤,并对即插即用武器集成过程中的关键技术进行了阐述.     

供应链管理信息集成框架

在分析传统的分布式计算技术的基础上,提出了基于Web服务的供应链信息集成框架,阐述了跨企业间信息访问的具体方法,说明了基于Web服务的技术优势,解决了供应链管理系统对异构系统的集成要求。     

基于HMP 架构CPU 的民机多安全级别系统实现方法

提出了一种基于HMP 异构多核CPU 和资源域控制器的设计方案，可部署在同一物理CPU 上并满 足DO178C 标准的多安全级别软件运行要求。首先讨论了HMP 异构多核CPU 和资源域控制器的相关概念及作 用，接着介绍了多安全级别系统的实现方案，最后在NXP iMX6 系统平台上进行设计和实现。结果表明，该方 案可成功地实现在机载设备上将不同安全级别的软件部署在同一物理CPU 上的需求，方案具有灵活、成本低 廉和功能可靠的优点。     

Network centric interoperability - using a variable message format (VMF) based data-link to improve situational awareness and close air support (CAS)

Clearly demonstrated in the recent military deployments in Afghanistan and Iraq, one of the most significant challenges now facing the warfighter is how to seamlessly interface the myriad of disparate stand-alone situational awareness (SA) and close air support (CAS) systems into the DoD's Network Centric Warfare (NCW) infrastructure. This point was recently highlighted in the Secretary of Defense's testimony to the Senate Armed Services Committee. Referring to mission critical shortfalls that occurred during the IRAQ deployment, the Secretary discussed the state of the current warfighting environment (Rumsfeld and Franks, 2003). Although tremendous progress has been made in the integration of new and emerging technologies and their applications on the battlefield, there is still a significant lack of interoperability between various communication systems. To address these battlespace management environment issues, Raytheon Technical Services Company's Engineering and Production Support facility underwent a product development effort to provide a network centric interoperability demonstration for CAS. This demonstration utilized various Raytheon-fielded SA and CAS products in a representative CAS scenario interfacing to variable message format (VMF) based data links. This paper addresses the systems and software issues encountered during this successful demonstration of CAS battlespace connectivity. This presentation will also discuss lessons learned during our product development from both a systems and a software engineering perspective.     

基于数据分发服务动态发现的通信监控设计

数据分发服务（DDS）在复杂航电系统中的应用越来越广泛，其以数据为中心的发布/订阅机制，解决了复杂系统异构、分布式、动态扩展、互操作和可移植的问题，同时也带来了系统描述和通信监控的困难。基于DDS实体动态发现的原理，提出了一种能够动态构建应用主题类型化接口，实现对网络中DDS实体间通信进行监控的通用设计方法。该方法能够满足基于DDS网络的通信监控需求，提高复杂系统快速集成和联调排故的效率。     

AVENUE: a platform for testing new concepts,the building block of a european ATM system

Faced with the urgent need to facilitate the next generation of Air Traffic Management systems and to alleviate the insufficient interoperability of its components, standardisation and validation activities have to be promoted. The AVENUE project brings to the public domain a set of interfaces and an ATC data dictionary defined by consensus of all stake-holders. The project goes on to prove the correctness of an architecture for open validation platforms with a first instance based at the Eurocontrol Experimental Centre which was built with existing ATC components provided by key European ATC players. This will constitute a solid basis for validation activities in the European Commission 5th Framework Programme and in other R&D programmes.     

基于消息的分布式工作流执行系统研究

工作流实例的执行处于整个管理系统的核心地位.传统的工作流管理系统多是采用客户机/服务器模式的集中运行,针对这种集中式工作流执行系统,研究了分布式的工作流执行方法,结合分布计算和异步消息通讯技术,提出了一种分层的工作流调度执行系统,将集中式系统中的业务处理、通讯压力分散到各个执行节点,最后给出了一个基于J2EE的原型系统.     

Biphase Barker-Coded Data Transmission Recommended Techniques for CAS

The use of biphase modulation and Barker data coding within the 200-us range/Doppler transmission proposed for collision avoidance systems (CAS) is described. Following a general discussion of requirements for compatibility between important CAS threat-evaluation measurements and less essential message communications, emphasis is placed on consideration of the binary Barker pulse sequences and the recommended biphase modulation techniques for data transmission.     

Smart test program set (TPS)

The Boeing Company has several research and development efforts focused on improving interoperability of the test station with other external systems as well as the interoperability within the test station itself. This includes integrating UUT data, test set-up, test execution, test results, repair and replace actions with other systems to provide a "closed-loop" system. One example of the "closed-loop" system is a non-intrusive tool referred to as Smart TPS (Test Program Set). Smart TPS will provide informational services to the user that reduce diagnostic test times and provide an ordered list of replacement actions based on historical data. Where possible, data are exchanged via the automatic test markup language (ATML).     

北斗导航接收机高增益相干积分算法

近年来,针对弱信号的高灵敏度接收机已逐渐成为国内外的研究热点。加长相干积分时间可以提高信噪比,从而跟踪到更弱的信号。但是,北斗导航接收机跟踪环路并不可以无限加长相干积分时间,相干积分时间的长短和功效还受到卫星导航电文比特跳变的限制。为了消除导航电文比特跳变对相干积分的影响,提出了一种改进的基于最大似然估计的北斗信号位同步方法,完成位同步后再利用先猜后检的方法便可以实现长相干积分。利用软件接收机进行编程设计,仿真结果表明：该长相干积分算法能够稳定可靠地实现对弱信号的跟踪,20ms相干积分环路信噪比约提升12dB,40ms相干积分环路信噪比约提升15dB,80ms相干积分环路信噪比约提升17dB,提高了北斗导航接收机的灵敏度。     

The flying object: a flight data management concept

The drive for greater cost-effectiveness and improved safety/security in an environment of increasing air movements calls for improved availability of accurate and consistent flight data to stakeholder systems. Studies conducted by EUROCONTROL in 2001-2003 indicate significant levels of inconsistency between flight data available to aircraft operators, air traffic control (ATC), air traffic flow management (ATFM), airports and military systems, causing unnecessary workload, inefficient use of resources, and unnecessary delays. Eurocontrol's new flight data interoperability concept is intended to resolve this problem. Having passed through the initial feasibility phase, this concept is now entering the development phase, in which it will become the basis for the development of a draft interoperability standard to be used in Europe for the specifications of new flight data processing systems deployed from 2007 onwards, and potentially to be proposed to the International Civil Aviation Organisation (ICAO) for global standardisation.     

Pilots's Associate Demonstration One

A brief overview is given of the DARPA- and AFWAL-sponsored Pilot's Associate Demonstration One project. The project developed prototypes for four avionics expert systems, with an emphasis on a crew station information manager (CSIM) system. CSIM operated on information from three supporting subsystems: a situation assessor, a mission planner, and an integration controller. These expert system (ES) prototypes were demonstrated in both a stand-alone environment on an symbolic processor and integrated with an engineering flight simulator. Some of the lessons learned during the project and potential future research directions for avionics ES are examined     

民机项目风险量化方法及应用的研究

民机项目中大量新技术的应用和众多复杂系统的集成,增加了项目进度、费用和性能的不确定性,在众多环节中风险因子要素层出不穷。为了保障民机项目过程的顺利进行,降低项目的风险水平,必须建立先进的风险管理体系。针对民机项目风险管理体系中的风险量化难题,深入挖掘风险量化手段本身的技术内涵,结合民机项目的特点,引入了模糊层次分析法的风险量化方法,并通过民机项目风险实例进行验证。