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The growing perception that with cutbacks in the military and the changing international economic environment, the military must rely on commercial industries in order to afford the next generation of high-performance and high-reliability military systems is discussed. One issue associated with the question of whether an industrial base for the military can be provided and maintained without major changes in the operation of both the government and commercial industry is examined, namely, whether commercial standards can effectively supplant military standards and still provide high performance and reliability for military missions 相似文献
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航天器轨道精确测定重要环节之一是有效地消除观测系统误差,在轨道测量数据处理时,一类是利用轨道约束自校准技术来估算和校准系统误差,另一类可以应用测元差分方法来消除系统误差(例如导航卫星测定目标)。本文提出一种新的差分技术,即利用观测数据时序差分消除系统误差技术,并推导相应确定航天器轨道的公式。 相似文献
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Pecht M.G. Fink J. Hakim E. Wyler J. 《Aerospace and Electronic Systems Magazine, IEEE》1997,12(7):39-42
The Qualified Manufacturer List (QML) approach, detailed in MIL-I-38535, General Specification for Integrated Circuits (Microcircuit) Manufacturing, embraces many of the commercial practices employed by high volume microcircuit suppliers. Nevertheless, with the availability of highly reliable and lower cost commercial parts, the QML approach becomes unnecessary and undesirable. In this paper we attempt to show why US government support of the QML program is leading the military and government to unaffordable access to out-dated technologies, damaging our country's military and avionics position. We will present information to show why we support the retraction of MIL-PRF-38535 and any other documents which imply that QML parts are superior to commercial parts, including those of QPL, MIL-STD-454, and MIL-HDBK-217 (now prohibited from use in all new Army programs) 相似文献
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Fayette D.F. Speicher P. Stoklosa M.J. Evans J.V. Evans J.W. Gentile M. Pagel C.A. Hakim E. 《Aerospace and Electronic Systems Magazine, IEEE》1993,8(8):32-38
A joint military-commercial effort to evaluate multichip module (MCM) structures is discussed. The program, Reliability Technology to Achieve Insertion of Advanced Packaging (RELTECH), has been designed to identify the failure mechanisms that are possible in MCM structures. The RELTECH test vehicles, technical assessment task, product evaluation plan, reliability modeling task, accelerated and environmental testing, and post-test physical analysis and failure analysis are described. The information obtained through RELTECH can be used to address standardization issues, through development of cost effective qualification and appropriate screen criteria, for inclusion into a commercial specification and the MIL-H-38534 general specification for hybrid microcircuits 相似文献
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ATLAS2K--以信号描述为核心的可扩展的可移植的自动测试语言 总被引:2,自引:0,他引:2
详细介绍了以信号描述为核心的新一代测试语言ATLAS2K的特点及层模型,并提出了ATLAS2K在自动测试设备ATE中的应用。 相似文献
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Pecht M. Boullie J. Hakim E. Jain A.K. Jackson M. Knowles I. Schroeder R. Strange A.D. 《Aerospace and Electronic Systems Magazine, IEEE》1998,13(2):16-20
As avionic systems become more complex, realistic qualification requirements for the flight-critical systems becomes more important, but more difficult to define. Requirements developed to establish acceptable levels of performance must be verifiable if they are to have any meaning. This article shows that both the current FAA requirements of flight-critical systems and the FAA recommended methods for probabilistic assessment are flawed, and result in “required” safety assessments which are misleading. Alternatives are then explored 相似文献
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