Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165743
F. Carden, M. Ross
Rate 2/3 8-PSK codes of 4, 8, 16, and 64 states were tested by simulation. The codes used are those found in Ungerboeck's original search. The results found were in close agreement with those predicted by analytical means in literature. The Ungerboeck codes of 8, 16, and 64 states show coding gains of 0.2, 0.3, and 0.86 dB, respectively, relative to the four state code. Worthwhile gains are obtained in increasing the number of states of the encoder up through 64.<>
{"title":"64-state TCM for spectrally efficient space communications (Trellis coded modulation)","authors":"F. Carden, M. Ross","doi":"10.1109/NAECON.1991.165743","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165743","url":null,"abstract":"Rate 2/3 8-PSK codes of 4, 8, 16, and 64 states were tested by simulation. The codes used are those found in Ungerboeck's original search. The results found were in close agreement with those predicted by analytical means in literature. The Ungerboeck codes of 8, 16, and 64 states show coding gains of 0.2, 0.3, and 0.86 dB, respectively, relative to the four state code. Worthwhile gains are obtained in increasing the number of states of the encoder up through 64.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127556569","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}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165861
K. Durako
In February 1990, the defense mapping agency (DMA) opened the Warrior Support Center (WSC), a facility to orient warfighters, trainers, and supporting system developers on current and future mapping, charting, and geodetic (MC&G) products and their use in the modern combat environment. The facility provides developmental test and evaluation areas to bring service, unified and specified command, and intelligence users into MC&G product related concept and analysis activities earlier and to promote interoperability. The author presents an overview of the WSC and R&D activities planned at the WSC during 1991.<>
{"title":"Research and development activities at the Defense Mapping Agency's new Warrior Support Center","authors":"K. Durako","doi":"10.1109/NAECON.1991.165861","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165861","url":null,"abstract":"In February 1990, the defense mapping agency (DMA) opened the Warrior Support Center (WSC), a facility to orient warfighters, trainers, and supporting system developers on current and future mapping, charting, and geodetic (MC&G) products and their use in the modern combat environment. The facility provides developmental test and evaluation areas to bring service, unified and specified command, and intelligence users into MC&G product related concept and analysis activities earlier and to promote interoperability. The author presents an overview of the WSC and R&D activities planned at the WSC during 1991.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127743264","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}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165931
S. Chattoraj
For pt.I see Proc. NAECON 90, p.1325. The author suggests that comprehensive understanding of the Department of Defense weapons acquisition process involves the study of many subjects, such as world history with special reference to the rise and fall of nations, the role of a military organization in society, American science policy since World War II, the changing nature of American power, glasnost, perestroika and other events, their effects on world economy, competitive advantages of nations, global forces restructuring the future of America, high technology of new weapons, and politics, science, technology and religion. He attempts to present a holistic approach consistent with the vision of a more productive America.<>
{"title":"Total quality movement in the Aeronautical Systems Division, Wright-Patterson Air Force Base, Ohio. II","authors":"S. Chattoraj","doi":"10.1109/NAECON.1991.165931","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165931","url":null,"abstract":"For pt.I see Proc. NAECON 90, p.1325. The author suggests that comprehensive understanding of the Department of Defense weapons acquisition process involves the study of many subjects, such as world history with special reference to the rise and fall of nations, the role of a military organization in society, American science policy since World War II, the changing nature of American power, glasnost, perestroika and other events, their effects on world economy, competitive advantages of nations, global forces restructuring the future of America, high technology of new weapons, and politics, science, technology and religion. He attempts to present a holistic approach consistent with the vision of a more productive America.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"23 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132798434","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}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165932
E. Strong
It is noted that total quality management (TQM) literature traditionally either focuses on examples from manufacturing industries or provides strategic insights for upper managers. However, much of the work done in the aerospace and defense industries involves technical services. It is suggested that, with shrinking government budgets, the ability to perform project-level technical services using quality-centered approaches becomes a competitive factor. The author addresses these shortcomings in the literature by providing practical lessons learned from successful aerospace technical services projects using TQM principles. The lessons learned include observations on successes and failures. Recommendations for implementation in projects are provided. It is concluded that, for a technical services company, the organizational unit which will benefit the most from TQM is the one that interfaces directly with customers-the project.<>
{"title":"Applying TQM to technical services projects","authors":"E. Strong","doi":"10.1109/NAECON.1991.165932","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165932","url":null,"abstract":"It is noted that total quality management (TQM) literature traditionally either focuses on examples from manufacturing industries or provides strategic insights for upper managers. However, much of the work done in the aerospace and defense industries involves technical services. It is suggested that, with shrinking government budgets, the ability to perform project-level technical services using quality-centered approaches becomes a competitive factor. The author addresses these shortcomings in the literature by providing practical lessons learned from successful aerospace technical services projects using TQM principles. The lessons learned include observations on successes and failures. Recommendations for implementation in projects are provided. It is concluded that, for a technical services company, the organizational unit which will benefit the most from TQM is the one that interfaces directly with customers-the project.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"433 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134010553","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}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165761
T. Conquest, D. DeMyer
The authors present an overview of the application of various memory technologies for flight data recorder (FDR) systems. Memories considered include battery-backed static RAM, full-featured EEPROM, flash EEPROM, and optical disks. FDR systems are particularly dependent on nonvolatile memory technologies, which must be selected based on the various functional, environmental, and cost-associated requirements of the applicable system. In order to select the memory technology best suited for a particular system application, a thorough understanding of the various specifications of each memory component type is required. The authors discuss these issues in detail.<>
{"title":"Memory technology applications for airborne flight data recorder systems","authors":"T. Conquest, D. DeMyer","doi":"10.1109/NAECON.1991.165761","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165761","url":null,"abstract":"The authors present an overview of the application of various memory technologies for flight data recorder (FDR) systems. Memories considered include battery-backed static RAM, full-featured EEPROM, flash EEPROM, and optical disks. FDR systems are particularly dependent on nonvolatile memory technologies, which must be selected based on the various functional, environmental, and cost-associated requirements of the applicable system. In order to select the memory technology best suited for a particular system application, a thorough understanding of the various specifications of each memory component type is required. The authors discuss these issues in detail.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134619064","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}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165839
D. Collier
The author describes the effort required to interface two case tools, Teamwork for software analysis and design, and 'T' for software testing. He documents and shares experiences about interconnecting these CASE (computer-aided software engineering) tools. The interconnection was constructed to transfer information from Teamwork to 'T' automatically, thus reducing the amount of labor required to translate from one tool to the other.<>
{"title":"Interfacing Teamwork to a 'T' for automated test case generation from data flow diagrams-a case study","authors":"D. Collier","doi":"10.1109/NAECON.1991.165839","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165839","url":null,"abstract":"The author describes the effort required to interface two case tools, Teamwork for software analysis and design, and 'T' for software testing. He documents and shares experiences about interconnecting these CASE (computer-aided software engineering) tools. The interconnection was constructed to transfer information from Teamwork to 'T' automatically, thus reducing the amount of labor required to translate from one tool to the other.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134079547","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}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165813
B.J. Shelburne, M.J. Pitarys
Attention is given to the Common Ada Missile Packages (CAMPs), a large collection of generic real-time embedded missile software that allows users to implement many applications, such as navigation routines, Kalman filters, and mathematical operations. In addition to a library of 'reusable' software, a parts engineering system (PES) was developed under the CAMP program. The use of CAMP for avionics software applications was investigated. It was found that CAMP in its current state was not suitable for avionics applications. The attempts to create avionics software with CAMP led to an abundance of observations concerning the writing and use of reusable software for avionics applications. The results of the avionics software reuse research are described. The authors also identify some of the errors found in the CAMP software and list recommendations that need to be adopted if widescale application of reusable software is to be a success.<>
{"title":"Avionics software reusability observations and recommendations","authors":"B.J. Shelburne, M.J. Pitarys","doi":"10.1109/NAECON.1991.165813","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165813","url":null,"abstract":"Attention is given to the Common Ada Missile Packages (CAMPs), a large collection of generic real-time embedded missile software that allows users to implement many applications, such as navigation routines, Kalman filters, and mathematical operations. In addition to a library of 'reusable' software, a parts engineering system (PES) was developed under the CAMP program. The use of CAMP for avionics software applications was investigated. It was found that CAMP in its current state was not suitable for avionics applications. The attempts to create avionics software with CAMP led to an abundance of observations concerning the writing and use of reusable software for avionics applications. The results of the avionics software reuse research are described. The authors also identify some of the errors found in the CAMP software and list recommendations that need to be adopted if widescale application of reusable software is to be a success.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124476406","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}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165875
Yao Susu, S. Zhongkang
In a frequency-agile magnetron radar, the cavity frequency tracking system of the tuning magnetron is used to control the transmitted pulse sequences and carry out the auto-track of the local oscillator. An experimental scheme of a small steady-state error tracking system is proposed, and the principle of the tracking system is described. The time-domain and frequency-domain performance of the tracking system is discussed. Experimental results indicate that this system has a high tracking accuracy.<>
{"title":"The precise tracking system for cavity frequency of tuning magnetron","authors":"Yao Susu, S. Zhongkang","doi":"10.1109/NAECON.1991.165875","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165875","url":null,"abstract":"In a frequency-agile magnetron radar, the cavity frequency tracking system of the tuning magnetron is used to control the transmitted pulse sequences and carry out the auto-track of the local oscillator. An experimental scheme of a small steady-state error tracking system is proposed, and the principle of the tracking system is described. The time-domain and frequency-domain performance of the tracking system is discussed. Experimental results indicate that this system has a high tracking accuracy.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125025053","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}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165925
D. O'Conchuir, J. Mccurdy, V. Casey
Non-destructive techniques for solder joint inspection are surveyed. Both commercially available systems and methods still under research are described. The techniques are divided into visual, thermal, X-ray, and acoustic inspection. The mode of operation for each method is described and its good and bad points are looked at. It is seen that each method is suited to a particular inspection need, and no one technique fulfils all the requirements for a perfect system.<>
{"title":"Survey of non-destructive inspection methods for solder joint integrity","authors":"D. O'Conchuir, J. Mccurdy, V. Casey","doi":"10.1109/NAECON.1991.165925","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165925","url":null,"abstract":"Non-destructive techniques for solder joint inspection are surveyed. Both commercially available systems and methods still under research are described. The techniques are divided into visual, thermal, X-ray, and acoustic inspection. The mode of operation for each method is described and its good and bad points are looked at. It is seen that each method is suited to a particular inspection need, and no one technique fulfils all the requirements for a perfect system.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":" 16","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132012212","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}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165748
P. Swart
One of the major problems in current technology in the military environment is the identification of failures that occur in airborne electronics while on a mission that cannot be reproduced on the ground-in other words, return tested OK (RTOK). A module that monitors environmental conditions, real time, called the Time Stress Measurement Module (TSMM) is described. TSMM monitors environmental conditions affecting electronics modules and within electronic systems for test, maintenance, and AVIP purposes. The current TSMM provides for monitoring of temperatures, vibration, shock, voltage variations, and transients. The sensor data can be accessed across the PI-bus at any time before, during, or after a mission while the module is installed, allowing an expert system to take extreme environmental conditions and predict failures or correlate that data against failures that have already occurred. The sensor data can be retained after loss of power.<>
{"title":"RTOK elimination with TSMM","authors":"P. Swart","doi":"10.1109/NAECON.1991.165748","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165748","url":null,"abstract":"One of the major problems in current technology in the military environment is the identification of failures that occur in airborne electronics while on a mission that cannot be reproduced on the ground-in other words, return tested OK (RTOK). A module that monitors environmental conditions, real time, called the Time Stress Measurement Module (TSMM) is described. TSMM monitors environmental conditions affecting electronics modules and within electronic systems for test, maintenance, and AVIP purposes. The current TSMM provides for monitoring of temperatures, vibration, shock, voltage variations, and transients. The sensor data can be accessed across the PI-bus at any time before, during, or after a mission while the module is installed, allowing an expert system to take extreme environmental conditions and predict failures or correlate that data against failures that have already occurred. The sensor data can be retained after loss of power.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132528795","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}
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