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Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)最新文献

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Silicon carbide power converters for next generation aerospace electronics applications 用于下一代航空航天电子应用的碳化硅功率变换器
Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093) Pub Date : 2000-10-10 DOI: 10.1109/NAECON.2000.894955
Krishna Shenai
{"title":"Silicon carbide power converters for next generation aerospace electronics applications","authors":"Krishna Shenai","doi":"10.1109/NAECON.2000.894955","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894955","url":null,"abstract":"New material technologies such as Silicon Carbide (SiC) are promising in the development of compact high-power converters for next generation aerospace power electronics applications. This paper presents an optimized converter design approach that takes into consideration non-linear interactions among various converter components, source and load. A 50% improvement in converter power density is calculated for a 100 V-2 kV, 7 kW SiC DC-DC power converter operating at 150/spl deg/C as compared to a silicon power converter. Experimental results of hard- and soft-switched SiC power converters using commercial Schottky and PiN diodes and JFET's are reported at lower power levels.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121047489","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: 18
UAV autonomous control system reliability-what should it be, and how do we reach it? 无人机自主控制系统的可靠性——它应该是什么，我们如何达到它?
Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093) Pub Date : 2000-10-10 DOI: 10.1109/NAECON.2000.894997
B. Clough
{"title":"UAV autonomous control system reliability-what should it be, and how do we reach it?","authors":"B. Clough","doi":"10.1109/NAECON.2000.894997","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894997","url":null,"abstract":"Summary form only given, as follows. The Air Vehicles Directorate of the US Air Force Research Laboratory is pressing ahead with designing and implementing autonomous control systems for both individual UAVs as well as hierarchical and/or distributed control for packs (or swarms) of UAVs. The goal is to truly make the man the stategist, tell the UAV(s) what is needed and the UAVs go away, figure out how- to do it, and execute the mission. Implicit in all of this is safety. One of our goals is to make these UAVs as reliable as, or better than, manned aircraft. This paper looks at what that actually means without a pilot in the loop, and the requirements flow-down, both overt and implied, which places the specifications on the subsystems and components. At the end we \"prognosticate\" the possible impacts to current best practices in testing and certification, stressing the need to possibly look at this a bit differently for these types of systems-a paradigm shift may be in order.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116631056","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: 7
Classification of digital modulations using the LPC 使用LPC的数字调制分类
Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093) Pub Date : 2000-10-10 DOI: 10.1109/NAECON.2000.894992
Sangwoo Cho, C. Lee, J. Chun, Dongmyung Ahn
{"title":"Classification of digital modulations using the LPC","authors":"Sangwoo Cho, C. Lee, J. Chun, Dongmyung Ahn","doi":"10.1109/NAECON.2000.894992","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894992","url":null,"abstract":"We propose a new digital modulation classification method based on the continuous-time wavelet transformation (CWT) and the linear predictive coding (LPC) method. The LPC coefficients extracted from the LPC model of the CWT for a modulated signal is chosen as the feature used to classify the modulation types of BPSK, QPSK, FSK and jammer. By using several reference features per modulation type we can make our algorithm robust to the influence of noise. To verify the proposed modulation classification algorithm, simulations are performed, which demonstrate excellent classification rates.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121829902","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: 10
Real time fingerprint identification 实时指纹识别
Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093) Pub Date : 2000-10-10 DOI: 10.1109/NAECON.2000.894943
Mohammad S. Alam, M. Akhteruzzaman
{"title":"Real time fingerprint identification","authors":"Mohammad S. Alam, M. Akhteruzzaman","doi":"10.1109/NAECON.2000.894943","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894943","url":null,"abstract":"The pattern matching for fingerprints requires a large amount of data and computation time. Practical fingerprint identification systems require minimal errors and ultrafast processing time to perform real time verification and identification. By utilizing the two-dimensional processing capability, fast processing speed and non-interfering communication of optical processing techniques, such extremely fast real time fingerprint identification systems can be implemented. Among the various pattern matching systems, the joint transform correlator (JTC) has been found to be inherently suitable for real time matching applications. Among the various JTCs the fringe-adjusted JTC has been found to yield significantly better correlation output compared to alternate JTCs. In this paper, a fingerprint identification system has been developed based on the fringe-adjusted JTC. Since all pattern matching systems suffer from high sensitivity to distortions, the synthetic discriminant function concept has been incorporated in fringe-adjusted JTC to ensure distortion-invariant fingerprint identification.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122671215","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: 12
The /spl alpha/-/spl beta/-/spl eta/-/spl theta/ tracker with a random acceleration process noise 带有随机加速过程噪声的/spl alpha/-/spl beta/-/spl eta/-/spl theta/跟踪器
Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093) Pub Date : 2000-10-10 DOI: 10.1109/NAECON.2000.894906
J. J. Sudano
{"title":"The /spl alpha/-/spl beta/-/spl eta/-/spl theta/ tracker with a random acceleration process noise","authors":"J. J. Sudano","doi":"10.1109/NAECON.2000.894906","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894906","url":null,"abstract":"Time has proven that /spl alpha/-/spl beta/ filters provide a good and useful tracking methodology when used with sensors that measure position only. As new sensors are being integrated into platforms that measure position and Doppler velocity, a new tracker is required to properly process both position and velocity sensor measurements. This article introduces an /spl alpha/-/spl beta/-/spl eta/-/spl theta/ filter, which processes both position and velocity sensor measurements. This new filter optimally tracks objects having a random acceleration maneuver model while being updated from a sensor having position and velocity measurement estimates.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131759811","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
Concurrent engineering: evolution and application 并行工程:演进与应用
Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093) Pub Date : 2000-10-10 DOI: 10.1109/NAECON.2000.894987
F. Oliveto
{"title":"Concurrent engineering: evolution and application","authors":"F. Oliveto","doi":"10.1109/NAECON.2000.894987","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894987","url":null,"abstract":"When a new complex electronic product is being developed, an approach is chosen, either directly or indirectly, to obtain the final design. Once the approach is chosen or implied, it is followed throughout the design and development phase. This is done to ensure that it will meet the specified requirements within the mechanical, electrical, and other environmental constraints. One approach allows all ingredients crucial of a successful product to be considered, such as: design, manufacturing, testing, reliability, human factors, producibility, and cost, as well as customer's needs and satisfaction. This approach-Concurrent Engineering-can be defined as a systematic team approach in which all disciplines participate in the design and development of products and related processes simultaneously to obtain common objectives. This paper delineates the detailed processes and procedures to implement concurrent engineering effectively and makes specific recommendations to obtain the desired results. In the process, it compares concurrent engineering to a symphony orchestra to illustrate the profit to be realized when all of the involved disciplines cooperate to produce the final product.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131993841","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: 8
Active-matrix pixelized well detectors on polymeric substrates 聚合物衬底上有源矩阵像素化阱探测器
Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093) Pub Date : 2000-10-10 DOI: 10.1109/NAECON.2000.894948
J. Huang, W. Qian, H. Klauk, T. Jackson, K. Black, P. Deines-Jones, S. Hunter
{"title":"Active-matrix pixelized well detectors on polymeric substrates","authors":"J. Huang, W. Qian, H. Klauk, T. Jackson, K. Black, P. Deines-Jones, S. Hunter","doi":"10.1109/NAECON.2000.894948","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894948","url":null,"abstract":"There is currently considerable interest in the fabrication of lightweight, large-area information displays, detectors, imaging sensors, and flexible electronic circuits. We have developed a process to fabricate thin-film amorphous silicon (a-Si) based active-matrix pixelized well detectors on polymeric substrates. Thin-film a-Si is inherently lightweight and can be deposited over very large areas. Electronic devices made by a-Si are typically made on rigid substrates such as glass plates, however, glass substrates are heavy, rigid, and fragile. Alternative substrates such as polymeric films are of interest for a variety of applications, including rugged active-matrix flat panel displays, lightweight spacecraft solar arrays, and flexible imaging sensors. Recently, we have demonstrated a-Si photovoltaic cells, a-Si thin-film transistors (TFTs), and integrated a-Si TFT circuits on flexible Kapton polyimide substrates with characteristics similar to devices made on glass substrates. Here we report on a flat-panel detector for X-rays and charged particles generated by gamma rays, which uses an array of microelectromechanical (MEMS)-like detector structures integrated with a-Si TFTs on a polymeric substrate.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114874940","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
Cognitive software engineering for supporting thin clients intranet based e-commerce 用于支持瘦客户机的基于内部网的电子商务的认知软件工程
Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093) Pub Date : 2000-10-10 DOI: 10.1109/NAECON.2000.894989
A. Das, D. Eyster, R. Peters
{"title":"Cognitive software engineering for supporting thin clients intranet based e-commerce","authors":"A. Das, D. Eyster, R. Peters","doi":"10.1109/NAECON.2000.894989","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894989","url":null,"abstract":"It is claimed that a cognitive science approach to e-business operations with thin clients and intranets requires that both the client and server sides be taken as enterprises. This paper explains how the client-server process engineering demands the cohabitation of hybrid operations of many types like the remote procedure calls and message oriented middleware, or, storage area network and network attached storage. This paper establishes a claim for software engineering activities in a possibilistic domain.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116096338","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
Quality of service and call admission control for adaptive multimedia services in wireless/mobile networks 无线/移动网络中自适应多媒体业务的服务质量和呼叫准入控制
Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093) Pub Date : 2000-10-10 DOI: 10.1109/NAECON.2000.894913
Yang Xiao, Clark Chen, Y. Wang
{"title":"Quality of service and call admission control for adaptive multimedia services in wireless/mobile networks","authors":"Yang Xiao, Clark Chen, Y. Wang","doi":"10.1109/NAECON.2000.894913","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894913","url":null,"abstract":"Multimedia services with Quality of Service (QoS) have become very demanded in wireless/mobile networks. Call admission control (CAC) is vital for these services partially due to the network's limited capacity. In this paper, we propose a call admission control framework for adaptive multimedia services in a wireless/mobile network, where the bandwidth of an ongoing call is time-varying during its lifetime. A call is degraded if the assigned bandwidth is below its request bandwidth. We introduce a new QoS parameter: degraded area size (DAS). It stands for the normalized mean product of the proportion of a calls degraded time and the degree of degradation. Based on DAS, we present a CAC model to show how to guarantee DAS. We also introduce a bandwidth reallocation algorithm to adjust calls bandwidth in a cell. Simulation results are compared with those from non adaptive multimedia services and show that the performance of our method is better.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123320550","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: 15
Tuning of fuzzy logic controller using neural network 模糊逻辑控制器的神经网络整定
Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093) Pub Date : 2000-10-10 DOI: 10.1109/NAECON.2000.894925
D. van Cleave, K. Rattan
{"title":"Tuning of fuzzy logic controller using neural network","authors":"D. van Cleave, K. Rattan","doi":"10.1109/NAECON.2000.894925","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894925","url":null,"abstract":"The transformation of expert's knowledge to control rules in a fuzzy logic controller has not been formalized and arbitrary choices concerning, for example, the shape of membership functions have to be made. The quality of a fuzzy controller can be drastically affected by the choice of membership functions. Thus, methods for tuning fuzzy logic controllers are needed. In this paper, neural networks and fuzzy logic are combined to solve the problem of tuning fuzzy logic controllers. The neuro-fuzzy controller uses the neural network learning techniques to tune the membership functions while keeping the semantics of the fuzzy logic controller intact. Both the architecture and the tuning algorithm are presented for a general neuro-fuzzy controller. From this, a procedure to tune a proportional fuzzy controller is obtained. The algorithm for off-line tuning of the fuzzy controller is demonstrated with a numerical example.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125071303","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: 19
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