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Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993最新文献

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Hypermedia for avionic system software 航空电子系统软件的超媒体
Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290966
F. Satlow
{"title":"Hypermedia for avionic system software","authors":"F. Satlow","doi":"10.1109/NAECON.1993.290966","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290966","url":null,"abstract":"The Hypermedia for Avionic System Software (HASS) was developed for the United States Air Force Wright Laboratory under contract with the Charles Stark Draper Laboratory. The Hypermedia Avionics Software Support (HASS) System is a prototype that demonstrates how access to technical reference manuals can be improved with the use of a computer utilizing the new techniques of hypermedia. The HASS framework consists of two parts: the Document Loader and the Reference System. Using the Document Loader, an author loads text, video, and audio, relating to a particular project into a database. The Reference System retrieves and presents the desired information stored in the database. The hypermedia links are created dynamically using standard database queries and require no maintenance.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"2 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":"129120944","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
DOA estimation with sensor gain, phase and position perturbations 基于传感器增益、相位和位置扰动的DOA估计
Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290894
Ming Zhang, Zhaoda Zhu
{"title":"DOA estimation with sensor gain, phase and position perturbations","authors":"Ming Zhang, Zhaoda Zhu","doi":"10.1109/NAECON.1993.290894","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290894","url":null,"abstract":"In array processing, super-resolution eigenstructure direction-of-arrival (DOA) estimation methods are known to be sensitive to sensor gain, phase and position perturbations. This paper presents a method to calibrate sensor gain, phase and position errors, simultaneously, which is based on three or more disjoint sources in known directions. The method can be applied to arbitrary arrays and low SNR cases. Computer simulations are given to demonstrate the performance of the calibration method.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"45 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":"123991564","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: 16
Second order oscillatory system parameter estimation 二阶振荡系统参数估计
Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290902
T. El-Ali, F. Scarpino, T. Kelly
{"title":"Second order oscillatory system parameter estimation","authors":"T. El-Ali, F. Scarpino, T. Kelly","doi":"10.1109/NAECON.1993.290902","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290902","url":null,"abstract":"In the absence of noise (or other uncertainty in measurement), the state vector of a deterministic, full state estimator can be made to systematically converge to the state vector of the system under observation. The above is true when the as reflected in the observer, is \"perfect\". When the modeling of the system under observation is less than perfect, the convergence characteristics of the observer are, in some manner, modified. A study of the behavior of the state estimator in the presence of errors in the plant model is usually undertaken. In contrast, a study of the estimation of the modified plant by the means provided in the information which may be gleaned from the modification in the convergence characteristics is undertaken. In this paper, the modified plant is determined by using the \"system-observer pair\" error dynamics.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"32 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120905803","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
Diagnostic reasoning technology for the on-board maintenance system 车载维修系统的诊断推理技术
Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290818
L.A. Reibling, S.C. Bublin
{"title":"Diagnostic reasoning technology for the on-board maintenance system","authors":"L.A. Reibling, S.C. Bublin","doi":"10.1109/NAECON.1993.290818","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290818","url":null,"abstract":"The authors describe On-board Maintenance System (OMS) developed by Smiths Industries Aerospace and Defense Systems, Inc. which includes inflight diagnostic and prognostic analysis of engines and mechanical systems. This on-board system is designed to enhance the data collection and recording function by providing the pilot with real-time system health information, on-board system and subsystem diagnosis, system performance prediction, and to assist ground maintenance personnel in diagnosing system malfunctions, and scheduling required maintenance actions. Ground maintenance crews have access to on-board diagnosis results while the aircraft is in flight via data link so they can be prepared when the aircraft lands to quickly repair failed units. In addition to the real time system health monitoring, the on-board system allows ground crews to perform maintenance on demand rather than performing maintenance based on time in service, thus tailoring the maintenance performed to the individual needs of each aircraft. A technology demonstration of the application of a hybrid reasoning system called the Diagnostic Reasoning Demonstrator (DRD) has been built which integrates a number of different knowledge sources and reasoning methods to demonstrate the diagnostic and prognostic analysis of mechanical failures trends and events in a gas turbine engine. The diagnostic reasoning technology is centered around hypothetical reasoning. The DRD consists of an engine model and simulator, a failure scenario builder, and the hybrid diagnostic reasoner. The demonstrator is implemented on a color laptop workstation.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"98 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":"116259715","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: 3
Complex associative memory neural network model for invariant pattern recognition 不变模式识别的复杂联想记忆神经网络模型
Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290824
A. Awwal, F. Ahmed
{"title":"Complex associative memory neural network model for invariant pattern recognition","authors":"A. Awwal, F. Ahmed","doi":"10.1109/NAECON.1993.290824","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290824","url":null,"abstract":"A complex associative memory neural network (CAMN/sup 2/) model is proposed for the recognition of handwritten characters. The input and the stored patterns are derived from the complex valued representation of the boundary of the characters. The stored vector representation is formulated based on 1-D representation of an optical pattern recognition filter. Retrieval of stored patterns from a noisy and shifted input is accomplished by using the correlation in the inverse Fourier domain. An adaptive thresholding scheme is then applied to obtain a 1-step convergence. The number of convergence of patterns, usually measured as the storage capacity of the associative memory is found to increase significantly. But the major advantage obtained from the complex representation is that the recognition of patterns is invariant to translation, rotation and scaling of the input patterns.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"144 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":"116373032","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
Digital controller-some implementation aspects 数字控制器的一些实现方面
Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290954
L. Su
{"title":"Digital controller-some implementation aspects","authors":"L. Su","doi":"10.1109/NAECON.1993.290954","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290954","url":null,"abstract":"Retuning controllers employed in a real plant is a formidable task for the process control engineer. The self-tuning(auto-tuning) controllers offer an alternative solution of this problem. The self-tuning controllers are being extensively used in industrial processes of different physical nature. This paper shows the fundamental system models and different controllers, and how they relate to instrument and process-oriented systems. The various digital control strategies and conventional algorithms of digital controllers are reviewed. Each design procedure is investigated and guidelines for selecting suitable values for the system parameters are discussed. The technical audit and interpretation contribute further insights into the existing restraints.<<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":"130752838","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
Standard generalized markup language (SGML) as a basis for an intelligent data management system 作为智能数据管理系统基础的标准通用标记语言(SGML)
Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290804
J. Haycox
{"title":"Standard generalized markup language (SGML) as a basis for an intelligent data management system","authors":"J. Haycox","doi":"10.1109/NAECON.1993.290804","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290804","url":null,"abstract":"Since its inception in the late eighties by DoD, the Air Force has been chartered to monitor and implement Computer-aided Acquisition and Logistic Support (CALS) strategies throughout its infrastructure. On the heals of the CALS movement is the Corporate Information Management (CIM) initiative. This initiative uses a CIM Technical Reference Model that \"defines a target framework and profile of standards\" for implementing a computing and communication infrastructure that will support portability, scalability, and interoperability of applications.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"57 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":"131001788","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: 3
Improved real-time optical pattern recognition using joint transform correlation 利用联合变换相关改进实时光学模式识别
Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290793
M. Alam, M. A. Karim
{"title":"Improved real-time optical pattern recognition using joint transform correlation","authors":"M. Alam, M. A. Karim","doi":"10.1109/NAECON.1993.290793","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290793","url":null,"abstract":"A new technique for enhancing correlation discrimination is achieved by using a fringe-adjusted joint transform correlator (JTC). This technique is found to yield significantly better correlation output than the classical and binary JTCs. It also avoids the computation intensive joint power spectrum binarization processing of a binary JTC.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"10 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":"132835180","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
Computing the lethality of a ballistic projectile 计算弹道弹丸的杀伤力
Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290923
J. J. Sudano
{"title":"Computing the lethality of a ballistic projectile","authors":"J. J. Sudano","doi":"10.1109/NAECON.1993.290923","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290923","url":null,"abstract":"One of the observations made over and over in the operation Desert Storm was the need to know the lethality of ballistic projectiles in the sky. One such measure is of the ballistic coefficient of the object. With this number one can distinguish a man in a parachute, debris, \"lethal debris\", a bomb, a missile, a plane, ... etc. This article addresses a mathematical approach that can be used to compute the ballistic coefficient.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"14 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":"133045443","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: 3
Myths die hard. Why? (aerospace engineers' role in non-defense work) 神话很难被打破。为什么?(航天工程师在非国防工作中的作用)
Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290799
H. Oman, P. Kostek
{"title":"Myths die hard. Why? (aerospace engineers' role in non-defense work)","authors":"H. Oman, P. Kostek","doi":"10.1109/NAECON.1993.290799","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290799","url":null,"abstract":"A myth is a falsehood perpetuated by a population that chooses not to investigate the underlying truth. Most myths are harmless. However, the myth that aerospace engineers are nonproductive in non-defense work certainly hurts our profession. We examine the mechanism used in promoting myths, and find that some myth perpetuators, including the ones that perpetuated the aerospace-engineer myth, are well compensated for their services. Also, substantial financial rewards are available to those who can correctly recognize the falsehood in myths. The 1950's myth, \"Trade in your car at 50,000 miles and save maintenance cost,\" is an example. We evaluate other myths.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"15 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":"133447103","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
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