Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993最新文献_第5页

A shunted ring fiber optic network topology providing fault detection, isolation and circumvention 一种提供故障检测、隔离和规避的分流环形光纤网络拓扑结构

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290907

A.S. Glista

{"title":"A shunted ring fiber optic network topology providing fault detection, isolation and circumvention","authors":"A.S. Glista","doi":"10.1109/NAECON.1993.290907","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290907","url":null,"abstract":"This paper describes an electro-optic and all optical implementation of a novel \"shunted ring\" network topology which uses optical waveguide shunts to bypass faults in ring networks. This technique eliminates the need for costly bypass switches and their related deficiencies. \"One-by-N\" tree couplers are used as the fanout mechanism from an LED or laser to send optical signals to a primary fiber and \"N\" shunt fibers. These shunt fiber waveguides can be \"switched\" into the active network when the optical signal in the primary fiber drops below a prescribed level. This permits rapid reconfiguration around a failed node or primary fiber path and minimizes or eliminates the loss of data. In a near term implementation of the concept, the signals from the input primary and shunt fibers are converted to electrical form with standard PIN photodiodes and the signal level is analyzed. If the signal falls below the preset threshold, the output from the shunt fiber(s) is electronically switched into the network node to restore robust network operation. The power budget to determine the number of successive nodes which can be bypassed is identically that of a \"1*N\" tree network permitting any number of bypasses within the link margin.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130897214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Application of QFT to the problem of failed in-flight controllers during approach and landing of a B-720 aircraft QFT在B-720飞机进近和降落过程中控制器失效问题中的应用

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290956

H. Chou, D. Biezad

引用次数: 1

Real-time simulation of electronic scanning antennas 电子扫描天线的实时仿真

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290928

R. Metz, H. Hirsch, J. Jones

{"title":"Real-time simulation of electronic scanning antennas","authors":"R. Metz, H. Hirsch, J. Jones","doi":"10.1109/NAECON.1993.290928","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290928","url":null,"abstract":"This paper demonstrates an optimal marriage of two diverse technologies: electromagnetic antenna modeling and distributed (parallel) computing techniques. It presents a new and innovative methodology for modeling a number of antennas, with electronic scanning capability, in real-time, tactical airborne radar system simulations. The initial discussions compare execution time test results for antenna gain and phase-shift calculations, for several different antenna types. These include examples of electronically scanned acquisition radar and four-horn monopulse tracking antennas as well as mechanically-scanning antennas. This analysis defines the relative computational complexities for models of these types of antennas. Execution results are compared for three classes of algorithms: rigorous, empirical, and lookup tables. The algorithm classes were evaluated using a mainframe VAX and three grades of personal computer (PC) systems: (80)286, (80)386, and (80)486-based machines. The number of times the various antenna pattern algorithms could be interrogated in certain time periods are given, for each type of antenna and computer, using the types of antenna typical of both airborne and ground-based tracking and acquisition radars. These results define the relative, machine-dependent performance of the antenna modeling algorithm classes. Finally, the paper discusses means by which parallel, distributed computing techniques may be applied to speed up the execution of the algorithms.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126618577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Criterion referenced objectives: a road map for course design 标准参考目标:课程设计的路线图

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290852

Larry Clemons

引用次数: 1

The role of technology assessment in training system definition 技术评估在培训体系定义中的作用

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290850

R. Heintzman

引用次数: 0

Applications of virtual audio 虚拟音频的应用

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290869

M. Ericson, W. D'Angelo, E. Scarborough, S. Rogers, P. Amburn, D. Ruck

{"title":"Applications of virtual audio","authors":"M. Ericson, W. D'Angelo, E. Scarborough, S. Rogers, P. Amburn, D. Ruck","doi":"10.1109/NAECON.1993.290869","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290869","url":null,"abstract":"Technology for electronically simulating spatial sound over loudspeakers and headphones has matured in the past few decades to facilitate many new applications of virtual audio. Electronic simulation of directional and distance auditory cues has greatly expanded the areas of application of virtual audio. Some potential aerospace applications include monitoring spatially separated speech communication signals to increase understanding, navigating by an auditory beacon, and acquiring visual targets with the aid of directional audio signals. Potential non-aerospace applications include navigational aids for the blind and enhanced virtual reality simulation for entertainment and education. In the future, more applications may use virtual audio technology to display spatial auditory information. Past, present, and future applications are discussed for aerospace, research, and entertainment industries. Techniques for creating virtual audio over loudspeakers and headphones are described. It is concluded that virtual audio systems are more flexible than previous physical simulations and can improve low fidelity.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133603235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Parameter estimation in a failure detection system of a fighter aircraft 战斗机故障检测系统的参数估计

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290957

D. McCartney, V. Skormin

引用次数: 0

The data bus of the next generation European fighters 下一代欧洲战斗机的数据总线

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290908

J. Mayoux

{"title":"The data bus of the next generation European fighters","authors":"J. Mayoux","doi":"10.1109/NAECON.1993.290908","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290908","url":null,"abstract":"STANAG 3910 is a NATO standard which describes the high speed data bus that is used on board both the next generation European fighters currently being developed: the Anglo-Germano-Italo-Spanish European Fighter Aircraft (EFA) and the French RAFALE fighter. STANAG 3910 is a \"dual-speed\" (1 Mbps+20 Mbps) data bus: a 20 Mbps, data-block-transfer-dedicated, High Speed line is added to, and controlled through a MIL-STD-1553B-fully-compliant Low Speed line. The optimized 20 Mbps data rate together with the use of MTL-STD-1553B as a basis result in a very cost-effective data highway which meets the requirements of the most recent aircraft. Next generation airborne systems require the exchange of many different kinds of data. Dassault Electronique has developed and produced compact MIL-STD-1553B/STANAG 3910 BCRT interface module (named HBM 3910) which provides the necessary functionalities and performances. STANAG 3910 has become a living reality fully supported by off-the-shelf products. It is expected to become the avionic data bus standard of the next 20 years in Europe. After briefly presenting the STANAG 3910 data bus, this paper focuses on how the latest requirements of military avionic systems have driven towards high-performance and enhanced-functionality bus interface components.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131434664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Evaluation of infrared missile warning algorithm suites 红外导弹预警算法套件评估

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290795

S. Hary, J. McKeeman, D. van Cleave

引用次数: 4

Thermal-structural reliability assessment of helix TWT interaction circuit using finite element analysis 利用有限元分析评估螺旋 TWT 相互电路的热结构可靠性

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290849

P. Rocci

{"title":"Thermal-structural reliability assessment of helix TWT interaction circuit using finite element analysis","authors":"P. Rocci","doi":"10.1109/NAECON.1993.290849","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290849","url":null,"abstract":"Finite element analysis (FEA) techniques were used to assess the mechanical performance due to thermal loading of a high power, wide band, helix traveling wave tube's interaction (slow wave) circuit. A steady state heat transfer analysis was performed using calculated heat dissipations and boundary temperatures that were obtained through data supplied by the TWT's manufacturer. The resulting temperatures from this analysis were used as loading conditions in a linear static analysis of a smaller model which represents a 12 turn section of the circuit. The failure modes investigated were cracking of the helix tape and fracture of the support rods due to excessive thermal stresses. Cracking of the helix tape would cause an open-circuit to occur while fracture of the support rods could cause small mechanical perturbations in the slow wave structure which may reflect the RF signal. Both cases could possibly lead to electrical failure of the TWT. Static stress analysis of the attenuation section indicated that the stress levels in the helix and support rods due to this particular temperature gradient were within acceptable limits and would not fracture if these components were free of initial cracks or flaws. Stresses through the helix were sufficient to nucleate cracks, however the length of these cracks would be minute and would not affect the useful life of the helix.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128307567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22