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Rich B.A. Lehnerd P.J. Gracia J.A. 《Aerospace and Electronic Systems Magazine, IEEE》1995,10(9):11-17
Projection of avionics system costs shows unacceptable escalation as a percentage of flyaway cost. Time sharing of RF modules between Radar, EW and CNI offers savings. The Air Forces' PAVE PACE program defined the benefits and initial architecture approaches. From this, an optimum Integrated Sensor System (ISS) design was defined that reduces the life cycle cost of the fleet of vehicles using the common modules. The ISS program will design, build and test modules to prove the approach. Challenges to overcome include system complexity, real time control, test and calibration, and diagnostics. The most stressing requirements were determined by analyzing requirements for Radar, EW and CNI. Open interface specifications and module partitioning were developed that can meet all the requirements 相似文献
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周烨斐刘艳涛 《民用飞机设计与研究》2014,(3):88-91
对比航电传统系统架构,分析了综合模块化航电系统(Integrated Modular Avionics,简称IMA)架构的优点;针对IMA系统功能的高集成度带来的资源分配难度和安全性要求,提出了IMA系统分区和资源分配策略,并给出了具体方法,对民用飞机IMA系统设计具有一定的指导意义和实用价值。 相似文献
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综合化航空电子系统可信软件技术 总被引:2,自引:3,他引:2
航空电子系统要求航空任务的执行具有确定性、可预测和可控性。深入分析综合化航空电子系统软件安全性、可靠性、完整性和实时性需求,提出了综合化航空电子系统软件可信性的定义。首次将可信计算引入到综合化航空电子系统中,建立综合化航空电子系统可信软件体系结构,在此基础上,提出软件可信运行环境构建方法和可靠性增强技术。这些技术能够保障综合化航空电子系统的可预测性,对保证飞机任务的执行及其安全具有重要的作用,为研制适合于中国大飞机的综合化航空电子系统可信软件奠定基础。 相似文献
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This paper addresses the avionics requirements definition process, at the conceptual level, in light of changing threats, technology, and business environments. The objective is to provide a perspective of total integrated system performance which illuminates broad requirements issues rather than specific subsystem specifications. The fundamental premise is that avionics requirements are driven by four factors; Information and Data Sources, Control Opportunities and Information Needs, Concepts and Algorithmic Techniques, and Realization Technologies. These four factors are set in a systems structure which shows their inter-relationships and provides the framework for conceptualizing avionics system solutions to meet particular mission needs. Three generic mission areas are considered and an examination is made of the issues of fielding and affording the solution with specific emphasis on architecture, fusion, production, and support. 相似文献
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The PAVE PACE Initiative has been established to validate system avionics concepts for advanced military aircraft. The author presents the rationale of why the advanced architecture established by the PAVE PILLAR program should be continued under PAVE PACE to achieve: practical and affordable airborne versions of modular parallel processing network architectures for many applications currently beyond real-time implementation, readily available avionics for use in all avionics and, greatly improved techniques to reduce the cost of software development and support. An approach to the overall design structure for future avionics is also presented that entails: the use of CAD (computer-aided design) tools to assist in the development of system, hardware and software requirements, the use of replicated hardware modules (some at the wafer level), the use of reuseable software modules and the use of CAD tools to tailor hardware/software modules for specific application requirements. Continued use of the PAVE PILLAR high-speed data bus and operating system is recommended as the means to integrate and control the data input and output of physically and functionally separate parallel networks 相似文献
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A formal approach using SysML for capturing functional requirements in avionics domain 总被引:1,自引:0,他引:1
In this work, a Model-Based Systems Engineering approach based on SysML is proposed. This approach is used for the capture and the definition of functional requirements in avionics domain. The motivation of this work is triple: guide the capture of functional requirements, validate these functional requirements through functional simulation, and verify efficiently the consistency of these functional requirements. The proposed approach is decomposed into several steps that are detailed to go from conceptual model of avionics domain to a formal functional model that can be simulated in its operating context. To achieve this work, a subset of SysML has been used as an intermediate modelling language to ensure progressive transformation that can be understood and agreed by system stakeholders. Formal concepts are introduced to ensure theoretical consistency of the approach. In addition, transformation rules are defined and the mappings between concepts of ARP4754A civil aircraft guidelines and SysML are formalized through meta-model. The resulting formalization enables engineers to perform functional simulation of the top-level functional architecture extracted from operational scenarios. Finally, the approach has been tested on an industrial avionics system called the Onboard Maintenance System. 相似文献
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新一代航空电子总线系统结构研究 总被引:2,自引:0,他引:2
航空电子总线系统结构是航空电子系统的神经中枢,直接决定着航空电子综合化程度的高低和性能的优劣。本文通过对航空电子数据总线结构现状和发展要求的分析,提出了新一代航空电子总线系统的设计原则和体系结构,并论述了其核心技术综合模块化航空电子系统的通用模块和综合核心处理机的组成。 相似文献
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Aging avionics have become a problem because aircraft are being kept in service far longer than the original plan. This paper discusses the four key problems of aging avionics: (1) determining the systems that are the high cost drivers in order to select those that should receive priority; (2) determining the requirements for the replacement; (3) identifying alternative technologies that will satisfy the requirements and are affordable; and (4) determining the funding required and acquiring the funding needed to replace the aging avionics. Challenges encountered in solving these problems include management and technical. The problem of aging avionics is not limited to a single aircraft, but occurs across all aircraft. Cost-effective modernization requires cutting horizontally across all aging aircraft, and coordination with the end users and the existing management structure. A key technical challenge is to select an architecture that is upgradeable since the funding limitations may ensure parts will become obsolete prior to the completion of a drawn-out production. 相似文献
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The avionics of current-day aircraft is termed as modular integrated full glass cockpit. Unlike lots of dials and gauges, the pilot will interact with Multi-Function Displays (MYD). This means that the systems are coupled with multi-function displays, communication and navigation radios with control units, multi-mode interactive instruments for control and navigation, recording and fault management systems, airframes and health monitoring diagnostic capabilities. Pilot Vehicle Interface (PVI) is an important measure of good avionics and cockpit layout, which implies the optimization of man-machine interface, enhancement of the economy, and safety of flight operations. This presents the avionics architecture of a 14-seat Light Transport Aircraft (LTA) for general aviation, which has multi-role commuter capabilities. LTA is a twin turbo-prop, multi-role aircraft, with air taxi and commuter services as its primary roles. The avionics is built on the digital communication mode for both command and control with current requirements of TCAS, digital Autopilot, and AMLCD multi-purpose glass displays. The LTA Avionics suite is grouped into six major groups based on functionality: Display System, Communication System, Navigation System, Recording System, Radar System, and Engine instruments and other cockpit displays. This paper also covers details about the extensive tests carried out to prove the avionics design in terms of functionality, inter-operability, interference, and compatibility. Various practical integration and flight-test issues, methodologies, and details of the scenarios is presented herein. 相似文献
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赵净净徐见源 《民用飞机设计与研究》2012,(1):10-12,72
航电系统的开发既要满足系统需求、保证系统完整性、达到系统安全性目标,同时还要满足相关条例、公务要求和商业要求。而这些要求往往相互制约、相互冲突,这就使得权衡研究在航电系统的开发过程中成为一项必不可少的工作。阐明了权衡研究在航电系统开发过程中的必要性和重要性;然后说明了权衡研究在航电系统开发过程各阶段中的作用;接着分析了权衡研究应遵循的过程;最后,将权衡研究分析方法中的效用曲线法应用到了航电系统的网络权衡中,并提出航电系统开发过程中如何进行权衡研究的一些建议。 相似文献
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航电系统仿真平台以其灵活方便和低成本特点,支持综合航电系统的预先研究、方案设计、详细设计、系统综合,成为综合航电系统研制过程中不可或缺的设计手段。给出了IMA系统仿真平台显示系统仿真器的详细的设计和实现方案,首先介绍了IMA系统仿真平台的组成,接着介绍了显示系统仿真器的组成架构,并对显示系统仿真器的硬件配置、航电网络配置、人机交互界面和逻辑处理进行了详细的介绍。最后经过IMA系统仿真试验样件验收测试程序的测试,验证了显示系统仿真器满足验收测试程序的各项功能和性能要求,满足了该型号显示系统仿真器的试验要求。 相似文献
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Parish D.J. Briggs R. Chambers D. Hunter C. Kelsall N. 《Aerospace and Electronic Systems Magazine, IEEE》1998,13(3):34-39
The issue of meeting the higher communications requirements of future aircraft avionics systems in an incremental manner is addressed. A communications architecture is proposed which is based upon a switched network technology from the telecommunications area asynchronous transfer mode (ATM). However, the major step of migrating all existing avionics equipment into an ATM compliant form is avoided by the process of “emulating” a current avionics data bus such as MIL-STD-1553B over an ATM network. This allows current 1553 subsystems to co-exist with ATM compliant equipment on a single physical ATM network 相似文献