Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993最新文献_第6页

Spontaneous organization of "intelligent fuzzy logic networks" in atmospheric flows 大气流动中“智能模糊逻辑网络”的自发组织

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290828

A. Selvam, M. Rabhamani, R. Vijayakumar

引用次数: 1

Coherent versus incoherent eyesafe lidar detection at 2.09 mu m 2.09 μ m相干与非相干眼安全激光雷达探测

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290782

J. Overbeck, S. McCracken, B. Duncan

引用次数: 0

Neural network hardware implementation for emitter identification 发射器识别的神经网络硬件实现

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290823

D. Zahirniak, J. Calvin, S. Rogers

{"title":"Neural network hardware implementation for emitter identification","authors":"D. Zahirniak, J. Calvin, S. Rogers","doi":"10.1109/NAECON.1993.290823","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290823","url":null,"abstract":"This paper presents the results of a neural network hardware implementation for emitter identification. In future electronic warfare environments, pulse densities on the order of hundreds of thousands of pulses per second can be expected in any given mission. To identify hostile radar systems, a processor must be able to store enough signatures for emitters of interest that proper identifications of unknown emitters can be made. Furthermore, the processor must make this identification in \"real-time\". This paper presents the results obtained when the Electronically Trainable Neural Network (ETANN) hardware is used to perform emitter identification from time-sampled emitter waveforms. The ETANN is a low (4-6 bit) resolution, high speed (2 billion operations/sec) parallel processor implementing sigmoidal-based backpropagation networks. This hardware was chosen due to minimal interlayer processing times, 3 us per layer, which can allow threat identifications to be made in a matter of microseconds. For this paper, a sigmoidal-based neural network was developed, via simulation on a DEC VAX station, to discriminate between 30 emitters. The network weights were loaded on the ETANN for performance comparisons. Due to resolution constraints, the accuracy of the ETANN was typically 10%-12% lower. However, the ETANN was able to make classifications in less than 6 us. This significant processing speed, with only slight degradations in performance, makes neural network architectures viable alternatives for emitter identification.<<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":"127884621","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: 4

B-2 automatic test equipment B-2自动测试设备

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290806

D. L. Carleton

引用次数: 0

Maximizing noise-limited detection performance in medium PFR radars by optimizing PFR visibility 通过优化PFR可见性，最大限度地提高中等PFR雷达的噪声限制检测性能

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290930

R.A. Moorman, J. Westerkamp

{"title":"Maximizing noise-limited detection performance in medium PFR radars by optimizing PFR visibility","authors":"R.A. Moorman, J. Westerkamp","doi":"10.1109/NAECON.1993.290930","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290930","url":null,"abstract":"Many modern air-to-air radars use medium pulse repetition frequency (PRF) as a principal operating mode. The ambiguities of the range and Doppler measurements inherent in medium PRF are resolved by switching between several carefully selected PRF values during the beam time on target. To achieve the desired detection performance and maintain an acceptable false-alarm rate, medium PRF radars typically employ a double-threshold detection scheme. This requires M correlated detections out of N PRF dwells during any single antenna beam position. The N PRF values are selected to avoid blind zones in range and velocity. Blind zones are regions in range-Doppler space where targets cannot be detected due to blanking for the transmission of the pulse, or main-beam ground clutter. The main-beam ground clutter varies in power, frequency, and range as a function of the radar's relative velocity, altitude, and antenna look angle. Advanced fighters are expected to perform against all aspect targets at a wide range of altitudes and speeds. performance in most conditions. The goal of this paper is to examine the effect that an adaptive PRF selection algorithm would have on the noise-limited performance of the radar. The algorithm would optimize PRF visibility by adapting to the changing blind zones. The results show that this simple algorithm can significantly increase the probability of detection for a given signal-to-noise ratio in many scenarios.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"5 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":"128660279","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: 5

Multiprocessor design using joint transform correlator 采用联合变换相关器的多处理器设计

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290794

M. Alam

引用次数: 0

Object imaging with a piezoelectric robotic tactile sensor 用压电机器人触觉传感器进行物体成像

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290890

C. Dyson, N.C. Yauilla, E. Kolesar

{"title":"Object imaging with a piezoelectric robotic tactile sensor","authors":"C. Dyson, N.C. Yauilla, E. Kolesar","doi":"10.1109/NAECON.1993.290890","DOIUrl":"https://doi.org/10.1109/NAECON.1993.290890","url":null,"abstract":"A two-dimensional, electrically-multiplexed robotic tactile sensor was realized by coupling a piezoelectric polyvinylidene fluoride (PVDF) polymer film to a monolithic silicon integrated circuit (IC). The IC incorporates 64 sensor electrodes arranged in a symmetrical 8*8 matrix. Each electrode occupies a 400*400 mu m square area, and they are separated from each other by 300 mu m. A 40- mu m thick piezoelectric PVDF polymer film was attached to the electrode array with an electrically non-conductive urethane adhesive. The response of the tactile sensor is linear for loads spanning 0.8 to 135 grams of force (gmf). The response bandwidth is 25 Hz, the hysteresis level is tolerable, and, for operation in the sensor's linear range, taxel crosstalk is negligible. The historically persistent stability and response reproducibility limitation associated with piezoelectric-based tactile sensors has been solved by implementing a novel pre-charge voltage bias technique to initialize the pre- and post-load sensor responses. A rudimentary tactile object image measurement procedure for applied loads has been devised to recognize the silhouette of a sharp edge, square, trapezoid, isosceles triangle, circle, toroid, slotted screw, and cross-slotted screw.<<ETX>>","PeriodicalId":183796,"journal":{"name":"Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993","volume":"388 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":"117240576","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: 119

Topologies of bidirectional PWM dc-dc power converters 双向PWM dc-dc功率变换器拓扑结构

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290953

M. Kazimierczuk, D. Q. Vuong, B. T. Nguyen, J. Weimer

引用次数: 34

Optical carry-free addition and borrow-free subtraction based on redundant signed-digit numbers 基于冗余带符号数字的光学无进位加法和无借位减法

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290789

A. Cherri

引用次数: 0

A jitter rejection technique in a satellite-based laser communication system 基于卫星的激光通信系统中的抖动抑制技术

Proceedings of the IEEE 1993 National Aerospace and Electronics Conference-NAECON 1993 Pub Date : 1993-05-24 DOI: 10.1109/NAECON.1993.290787

V. Skormin, M.A. Tascillo, D. J. Nicholson

引用次数: 13