基于Web的武器装备采办系统

旨在以某飞机的采办为例来研究和实现一个基于Web的武器装备采办系统,具体从2个方面着手:一方面讨论了采办阶段的划分以及采办系统的软件结构层次和系统总体框架;另一方面介绍了如何通过与ProjectServer和CATIA等现有成熟软件系统的集成实现武器装备采办系统。研究表明,通过与已有成熟软件(或系统)进行系统集成的方式实现采办系统是切实可行的。     

基于CORBA的分布式网络管理的研究

详细地介绍了将CORBA这种面向对象地分布式中间件用于网络管理的方法,着重探讨在实现基于CORBA的分布式网络管理中的关键的技术-CORBA/SNMP网关,通过CORBA/SNMP网关实现CORBA域与SNMP域的透明通信。     

基于分布对象的异步消息技术在测控软件中的应用

分析了一个基于分布对象的异步消息模型,该模型采用事件驱动方式,支持异步回调和异步轮询2种具有较高性能的异步调用模式。介绍了如何在遵循CORBA标准的分布对象框架内,实现一个精简的、基本的异步消息通信系统。针对航天测控软件需求,指出了在其中应用基于分布对象的异步消息技术将会产生的较大意义,并举例说明了如何实现其有价值的应用。     

CORBA规范及其技术核心

CORBA(通用对象请求代理结构)规范被称为是面向21世纪的软件总线.已成为流行的分布对象计算规范.CORBA规范的内容很丰富,本文着重从整体上把握CORBA的体系结构和核心内容.基于对CORBA的发展和技术特色的介绍,本文详细讨论了OMA(对象管理体系结构)模型、ORB系统组成和ORB运行过程.     

基于Web Service的网络化制造应用系统集成

网络化制造过程中联盟企业间应用系统的集成是数字化制造的一个关键问题,其主要困难是如何解决集成时各应用系统开发语言、运行平台、协议以及数据结构的差异。针对该问题,通过对网络化制造过程中应用系统的集成分析,进行了基于WebSer-vice的网络化制造应用系统集成模型和实现方法研究。     

基于模型的航电系统集成验证技术研究

为了满足系统集成度高、交联关系复杂的航电系统集成验证需求,提出了基于模型的航电系统集成验证技术。详细介绍了基于模型的航电系统仿真和测试方法,航电系统仿真建模规范,以及基于模型运行的航电系统集成验证平台。通过在航电系统集成过程中的应用,基于模型的集成方法有效地提高了航电系统集成效率,保证了航电系统集成准确度。该方法可应用于航电系统全数字集成、半物理集成和全实物动态集成,保证各阶段试验的衔接,持续提升航电系统集成工作的技术水平。     

基于半物理的飞管系统集成验证技术研究

本文基于半物理的飞管系统集成验证技术，详细介绍了基于半物理的飞管系统集成验证平台架构与实现，研究了基于半物理试验的飞管系统仿真建模方法，完成了用于飞管系统半物理试验的仿真模型开发。在某型飞管系统集成试验过程中，搭建了基于半物理的飞管系统集成验证平台，在完整的全系统仿真基础上，通过真件与仿真件之间的逐一替换，逐步完成飞管系统集成验证工作。该方法有效的提高了飞管系统集成效率，满足了飞管系统集成验证需求。     

飞机燃油系统集成设计考虑

系统集成设计是现代飞机研制中的核心技术。本文通过飞机燃油系统集成典型案例,采用系统工程的思想,分析系统集成相关要素,给出燃油系统集成设计的一般思路。研究结果可用于指导飞机燃油系统设计及飞机系统集成优化借鉴。     

基于模型的飞机地面减速系统架构设计方法

地面减速功能在飞机上的实现涉及多个系统,其综合系统架构具有很高的复杂性,多系统间的接口数量巨大且接口形式多样,多系统间的动态协同工作逻辑比较复杂。为了应对这种复杂性,提出了基于模型的系统架构设计方法,将SysML建模语言和面向对象的建模思想应用到飞机地面减速系统的架构设计和行为分析中,可以实现系统架构元素的统一定义和分解,以及多系统集成架构的统一接口定义和分析,同时可以实现系统静态架构和动态行为的协同设计;搭建了飞机级和系统级的架构模型和行为模型,实现了地面减速综合功能的分析和多系统集成架构的设计。实践表明,基于SysML的飞机地面减速综合系统架构设计方法可以有效应对多系统集成设计的复杂性,并提升集成设计的效率和质量。     

第三代飞机航空电子系统集成

介绍了航电系统集成实施的背景,叙述了为完成系统集成工作组建的系统集成环境,开发的数字化检验系统、建立的质量保障体系以及航电系统集成工作所取得的初步效果。     

基于CORBA构件的软件体系结构模型的实现

软件体系结构是一种新型的基于构件以及构件库的深层的软件复用,它的提出使超大规模软件设计的简化成为了可能。本文提出了基于CORBA构件的软件体系结构模型,并通过给出ADL的BNF语法,扩充CIDL编译器和CORBA的服务,从而描述了其实现模型。     

Sustainment of legacy automatic test systems: lessons learned on TPS transportability

Sustainment of legacy automatic test systems (ATS) saves cost through the re-use of software and hardware. The ATS consists of the automatic test equipment (ATE), the test program sets (TPSs), and associated software. The associated software includes the architecture the TPSs run on, known as the control software or test station test executive. In some cases, to sustain the legacy ATS, it is more practical to develop a replacement ATE with the latest instrumentation, often in the form of commercial off-the-shelf (COTS) hardware and software. The existing TPSs, including their hardware and test programs, then need to be transported, or translated, to the new test station. In order to understand how to sustain a legacy ATS by translating TPSs, one must realize the full architecture of the legacy ATS to be replaced. It must be understood that TPS transportability does not only include translating the original TPS from an existing language (such as ATLAS) to a new language (such as "C") to run on a new test station, but includes transporting the run-time environment created by the legacy ATS. This paper examines the similarities and differences of legacy ATE and modern COTS ATE architectures, how the ATS testing philosophy impacts the ease of TPS transportability from legacy ATE to modern-day platforms, and what SEI has done to address the issues that arise out of TPS transportability.     

Weapons System Open Architecture - a bridge between "embedded" and "off-board"

A demonstration program is described: Weapons System Open Architecture (WSOA) - funded jointly by the Air Force Research Laboratory (AFRL), DARPA, and the Open Systems Joint Task Force (OSJTF). WSOA provides an open systems "bridge" between legacy embedded mission systems and off-board C3I sources and systems. This "bridge" is used to support Internet-like connectivity between command and attack nodes. The foundation of this bridge is the creation of a Common Object Request Broker Architecture (CORBA) layer over Link 16. In addition, application of quality of service techniques and resource management technologies will ensure the timely exchange and processing of mission critical information by both attack and command nodes in even the most time-sensitive situations.     

Embedded information system re-engineering

Currently fielded embedded information systems face readiness challenges imposed by evolving missions and extended service lifespans. The ability to overcome these challenges is constrained by such factors as shrinking budgets, limited computational capacity and diminished manufacturing sources effects that impact both hardware and software options. Wholesale redevelopment is often cost prohibitive, particularly since large portions of embedded applications continue to fulfil mission requirements. Solutions must preserve prior investments while providing efficient pathways for continued technology refresh. A technology solution for affordable modernization of legacy system software is being development. The Embedded Information System Re-engineering (EISR) project is developing an automation-assisted JOVIAL-to-C re-engineering capability that permits simultaneous modernization of both the structure and source language of legacy embedded applications. Engineers will be able to apply the proven labor-saving visualization and analysis features of modern CASE tools to legacy JOVIAL applications. EISR will thus allow the DoD to recapture previous investments in proven legacy algorithms and mission capabilities while permitting the full exploitation of COTS economies of scale. This paper describes in brief the goals and objectives of the EISR project, and provides the current status of the EISR capability.     

软件再工程理论应用研究

软件再工程通过逆向工程、重构和正向工程几个环节,将现存系统开发成新的系统,是有效利用原有系统的现实可行的方法。本文研究了软件再工程的基本概念和目标、再工程的基本框架等理论;介绍了对某显控计算机软件的分析、重构和验证等内容。     

基于分布式的虚拟车削加工仿真系统的设计与实现

根据分布式的虚拟车削加工仿真系统的功能要求,确定了软件系统结构,选用CORBA作为开发方法,利用VC 语言和OpenGL技术相结合成功地开发了一个基于分布式的虚拟车削加工仿真系统。同时对程序的运行机理进行了分析。     

Replacement strategy for aging avionics computers

With decreasing defense dollars available to purchase new military aircraft, the inventory of existing aircraft will have to last many more years than originally anticipated. As the avionics computers on these aging aircraft get older, they become more expensive to maintain due to parts obsolescence. In addition, expanding missions and changing requirements lead to growth in the embedded software which, in turn, requires additional processing and memory capacity. Both factors, parts obsolescence and new processing capacity, result in the need to replace the old computer hardware with newer, more capable microprocessor technology. New microprocessors, however, are not compatible with the older computer instruction set architectures. This generally requires the embedded software in these computers to be rewritten. A significant savings-estimated in the billions of dollars-could be achieved in these upgrades if the new computers could execute the old embedded code along with any new code to be added. This paper describes a commercial-off-the-shelf (COTS)-based form, fit, function, and interface (F³I) replacement strategy for legacy avionics computers that can reuse existing avionics code “as is” while providing a flexible framework for incremental upgrades and managed change. It is based on a real-time embedded software technology that executes legacy binary code on the latest generation COTS microprocessors. This technology promises performance improvements of 5-10 times that of the legacy avionics computer that it replaces. It also promises a 4× decrease in cost and schedule over rewriting the code and provides a “known good” starting point for incremental upgrades of the embedded flight software. Code revalidation cost and risk are minimized since the structure of the embedded code is not changed, allowing the replacement computer to be retested at the “blackbox” level using existing qualification tests     

基于CORBA的可重载协议配置方法

为了满足对多协议通信的支持,研究CORBA对通信协议可加载的模型与方法.首先介绍传统CORBA通信模型,给出模型的主要内容;进而探讨可加载框架的一般性要求,提出可加载的CORBA通信协议配置模型;最后针对模型给出主要的实现方法.所提出的模型有效地克服了传统CORBA单协议支持、缺乏协议动态加载的缺陷,具有一定的理论和实际意义.