Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995最新文献_第7页

A patented approach to radiated testing of installed airborne Doppler radar with weather/windshear detection capability 具有天气/风切变探测能力的机载多普勒雷达的辐射测试专利方法

Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995 Pub Date : 1995-05-22 DOI: 10.1109/NAECON.1995.521907

J. F. Michaels

{"title":"A patented approach to radiated testing of installed airborne Doppler radar with weather/windshear detection capability","authors":"J. F. Michaels","doi":"10.1109/NAECON.1995.521907","DOIUrl":"https://doi.org/10.1109/NAECON.1995.521907","url":null,"abstract":"Low altitude windshear phenomena has been causally linked to numerous civil transport aircraft incidents with fatalities and injuries exceeding 800, covering a period of more than 25 years. The recent crash of a USAir DC-9 at Charlotte, N.C. on July 2, 1994 has caused an increased focus on windshear and microburst activity. Three sensor systems were investigated; radar, laser radar (lidar), and infrared imaging, with the pulsed Doppler radar consistently detecting both wet and dry microbursts indicative of hazardous windshear conditions at longer ranges than the other two. Numerous documents were reviewed, including the NASA Airborne Doppler Radar together with meetings held with Allied Signal, Rockwell Collins and Westinghouse to verify radar parameters needed to analyze and present the tester concept described herein. The weather and windshear models defined use the identical criteria established for the Doppler radar in terms of F-factor. The basic concept of the tester is to transmit coherent simulated radar returns in response to the airborne radar's transmission while mounted on a tripod in the far field of the radar when parked on the ramp. The varying amplitude of the received radar pulses are analyzed and put into memory as the tester antenna is illuminated by the scanning main beam and side lobes of the radar's antenna patterns. The tester transmissions, incorporating microburst, storm and previously defined, can thereby test the aircraft radar system performance in various hazard environments. The tester is designed to; verify operational performance of the radar, demonstrate installed radar performance, verify crew reports and minimize radar or LRU's removal for maintenance, test before and after a repair and verify radome effects on radar performance.","PeriodicalId":171918,"journal":{"name":"Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122096940","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

Long haul participation in a distributed interactive simulation demonstration 远程参与分布式交互仿真演示

Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995 Pub Date : 1995-05-22 DOI: 10.1109/NAECON.1995.522030

J. Woodyard, D. C. Reif

{"title":"Long haul participation in a distributed interactive simulation demonstration","authors":"J. Woodyard, D. C. Reif","doi":"10.1109/NAECON.1995.522030","DOIUrl":"https://doi.org/10.1109/NAECON.1995.522030","url":null,"abstract":"The Avionics Directorate at Wright Laboratory provided the simulation of a F-15E aircraft in the 1994 Interservice/Industry Training Systems and Education Conference (I/ITSEC) Distributed Interactive Simulation (DIS) demonstrations. The purpose of DIS is to allow dissimilar simulators distributed over a large geographic area to interact in a team environment for the purposes of training, equipment development, and equipment evaluation. I/ITSEC provides a forum for testing DIS concepts. The Integrated Test Bed (ITB) was made DIS compatible for the demonstrations. The ITB is a real-time avionics hot bench used to develop core avionics such as buses, processors, operating systems, and application software. An F-15E aero model is used to stimulate the avionics. The current core avionics suite, a PAVE Pillar derivative, was used to support multiple demonstrations. The DIS software was written in Ada and was integrated onto the ITB model set. The software was partitioned to provide input/output services, dead reckoning of the ITB, truth maintenance of the other players, and weapons. There were two methods used to connect the ITB to I/ITSEC. The Defense Simulation Internet (DSI) was connected to through a node at AFIT, which provided T1 bandwidth. Also, an Ethernet bridge was used with telephone lines to provide 56 Kbs bandwidth. The ITB participated in five I/ITSEC mini-demonstrations. The ITB flew air-to-ground missions, dropping bombs in four demonstrations and delivered a glide bomb in the fifth. Also, the ITB flew against a Surface to Air Missile (SAM) site provided by Amherst Systems. This paper will discuss, the use of DIS for hardware-in-the-loop evaluation, making an existing simulation DIS compatible, participating in a demonstration long haul, and the performance of the DIS software and the communication links.","PeriodicalId":171918,"journal":{"name":"Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124202735","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

Wide Area Augmentation System (WAAS) test and evaluation concepts 广域增强系统(WAAS)测试和评估概念

Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995 Pub Date : 1995-05-22 DOI: 10.1109/NAECON.1995.521931

R. Till, W. Wanner, J.R. Evangelos

{"title":"Wide Area Augmentation System (WAAS) test and evaluation concepts","authors":"R. Till, W. Wanner, J.R. Evangelos","doi":"10.1109/NAECON.1995.521931","DOIUrl":"https://doi.org/10.1109/NAECON.1995.521931","url":null,"abstract":"The Wide Area Augmentation System represents an FAA major acquisition that will augment the Department of Defense's Global Positioning System (GPS). The WAAS has the potential to reduce costs and improve capability by eventually replacing less efficient navigation and landing aids. The WAAS will provide augmentation to the basic GPS architecture improving accuracy, integrity, availability, and continuity of service for en route aircraft navigation to CAT I precision approaches within a specified service volume. The system architecture makes use of Geostationary Satellites, or GEOs. The GEOs transmit on L1 to enable GPS receivers to perform pseudoranging. In addition, the GEOs will include information in the message frame that contains differential correction, ionospheric delay estimates, and clock corrections. The collected and processed information originates from a ground network of reference stations that monitor the ionospheric and tropospheric conditions in their local vicinities and receive inputs from a highly accurate time baseline. The purpose of this paper is to describe the WAAS concepts, and the FAA's approach to Test and Evaluation on the program. The strategy for implementing the WAAS into the National Airspace System (NAS), and what constitutes a NAS element and NAS subsystem are discussed.","PeriodicalId":171918,"journal":{"name":"Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129088759","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

System development risk reduction using a system performance model 使用系统性能模型降低系统开发风险

Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995 Pub Date : 1995-05-22 DOI: 10.1109/NAECON.1995.522017

D.A. Bertke

{"title":"System development risk reduction using a system performance model","authors":"D.A. Bertke","doi":"10.1109/NAECON.1995.522017","DOIUrl":"https://doi.org/10.1109/NAECON.1995.522017","url":null,"abstract":"A major risk to system development lies in the improper determination of real time software performance requirements early in the development cycle. All too often, performance concerns are put off until test and integration, only to discover the software or hardware developed cannot perform the needed functions within the time allotted. One good way to avoid this embarrassing and costly problem is to develop a System Performance Model (SPM). A System Performance Model is a discrete event system simulation that measures system event timing, resource usage, and access scheduling interactions. SPM outputs include measured resource, executive, and input/output usage with detailed thread execution profiles. The SPM enables design engineers to focus on timing and performance issues as the requirements are assessed. As the preliminary design is partitioned between hardware and software, the SPM provides full timing and performance assessment data, enabling designers to establish achievable timing budgets for all system components. The SPM is tested against operational scenarios to derive a full parametric and sensitivity response for the proposed design. Armed with solid engineering data, designers proceed to detailed design with full knowledge of the critical hardware and software components to be developed. The established time budgets and sensitivities enable software managers to know exactly which modules and tasks require extra care, greatly reducing the risks. The SPM is used throughout the entire system development life cycle, identifying and solving timing and performance problems before significant investment is made in hardware and software modifications. This paper describes how the SPM is used throughout the system life cycle. Key performance and timing analysis topics are presented, along with an example showing the subtle dynamic interaction problems encountered by real time embedded software.","PeriodicalId":171918,"journal":{"name":"Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129883584","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

A way of multi-channel A/D for UWB signal 一种UWB信号的多路A/D处理方法

Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995 Pub Date : 1995-05-22 DOI: 10.1109/NAECON.1995.521939

Changqingpeng Gangyaokuang, Suyi Zhonglianglu

引用次数: 8

Dual use applications of hazard monitoring: commercial and military aviation and beyond 危险监测的双重用途应用:商业和军事航空及其他领域

Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995 Pub Date : 1995-05-22 DOI: 10.1109/NAECON.1995.522051

M. Skidmore, J.P. Zenyuh, R. Small, T. J. Quinn, C.A.D. Moyers

{"title":"Dual use applications of hazard monitoring: commercial and military aviation and beyond","authors":"M. Skidmore, J.P. Zenyuh, R. Small, T. J. Quinn, C.A.D. Moyers","doi":"10.1109/NAECON.1995.522051","DOIUrl":"https://doi.org/10.1109/NAECON.1995.522051","url":null,"abstract":"Hazard Monitoring is an innovative approach to addressing the problem of human error in complex systems: our Hazard Monitor aids the operator in recovery from hazardous situations, rather than attempting to prevent operator errors. A hazardous situation is one which may result in a Range of negative consequences, from a violation of system guidelines to a loss of equipment, or even loss of life. When the Hazard Monitor detects a hazardous situation, it creates a message and dispatches it to the operators, so that they become aware of and can remedy the situation before the negative consequences occur. Because the Hazard Monitor considers system states in relation to ongoing system activities, it is able to tailor the messages, adjusting both timing and content to reflect the context of the predicted consequences. By prompting for operator action to avert consequences as hazards arise, but remaining silent when operations are normal, the Hazard Monitor serves an unobtrusive operator aid, functioning without direct operator control. Hazard Monitoring technology has been designed as a general purpose technology, capable of assisting complex system operators in a wide variety of domains. This paper describes the Hazard Monitoring technology and its application in both military and commercial avionics domains, as well as other, non-avionics domains.","PeriodicalId":171918,"journal":{"name":"Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995","volume":" 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120833244","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

Fault tolerant behavior of redundant flight controls as demonstrated with the sure and assist modeling programs 用确定和辅助建模程序演示了冗余飞行控制的容错行为

Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995 Pub Date : 1995-05-22 DOI: 10.1109/NAECON.1995.521972

T. Sadeghi, D. Danton

{"title":"Fault tolerant behavior of redundant flight controls as demonstrated with the sure and assist modeling programs","authors":"T. Sadeghi, D. Danton","doi":"10.1109/NAECON.1995.521972","DOIUrl":"https://doi.org/10.1109/NAECON.1995.521972","url":null,"abstract":"A comparison and evaluation between a triple redundant and quadruple redundant flight control system (FCS) is performed through the use of NASA's ASSIST and SURE software programs. To enhance the productivity of these programs, the development of a user friendly, front-end, menu driven interface routine was initiated. The front-end tool provides a user environment based on a system block diagram concept and automatically converts the system inputs into ASSIST code. Two test case models were used to compute the Probability of Loss of Control (PLOC), the Probability Of Mission Abort (PMA), and the Probability of Hazard Condition (PHC) values for the two different architectures. The solutions obtained by these tools were compared against existing solutions obtained from approximate equations calculations for a certain set of system requirements. The data produced by these software tools displayed more accuracy then the conventional approximation approach; however, the overall system predictions remained consistent for both approaches. The quadruple architecture design surpassed the triple architecture design for the given system parameters by a significant safety factor margin. The software tools approach also demonstrated how the coverage percentage values, which represent the voter capabilities in recognizing and handling failures, significantly affected the system performance. The ability of the software tools to provide user friendly interactions that produce accurate results in a quick and easy manner make this method of predicting fault-tolerant reliabilities for flight control systems the preferred choice of analysis.","PeriodicalId":171918,"journal":{"name":"Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121090056","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

REAL-TIME EMBEDDED COMPUTING WITH TNE INTEL ARCHITECTURE 实时嵌入式计算与英特尔架构

Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995 Pub Date : 1995-05-22 DOI: 10.1109/NAECON.1995.521954

D. Dzatko

引用次数: 0

Adaptive neural network for identification and tracking control of a robotic manipulator 基于自适应神经网络的机械臂辨识与跟踪控制

Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995 Pub Date : 1995-05-22 DOI: 10.1109/NAECON.1995.521999

R. Ahmed, K. Rattan, O. Abdallah

{"title":"Adaptive neural network for identification and tracking control of a robotic manipulator","authors":"R. Ahmed, K. Rattan, O. Abdallah","doi":"10.1109/NAECON.1995.521999","DOIUrl":"https://doi.org/10.1109/NAECON.1995.521999","url":null,"abstract":"Effective control strategies for robotic manipulators require on-line computation of the robot dynamic model in real-time. However, the complexity of robot dynamic model makes this difficult to achieve in practice. Neural networks are an attractive alternative for identification and control of robotic manipulators, because of their ability to learn and approximate functions. This paper presents the development of an adaptive Multilayer Neural Network (MNN) as a feedforward controller for a robotic manipulator. The MNN is trained to identify the unknown nonlinear plant (inverse dynamics of a robotic manipulator) using a modified back-propagation technique. A PD controller is used in the feedback loop to guarantee global asymptotic stability. Also, the output of the PD controller is used as a learning signal for the on-line learning to adjust the weights of the MNN to capture any parameters variation and/or disturbances. The controller architecture developed has been simulated and its effect on the trajectory tracking performance of a manipulator has been evaluated and compared to the conventional adaptive controller.","PeriodicalId":171918,"journal":{"name":"Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120968444","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

J-mass graphical configuration and execution J-mass图形配置和执行

Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995 Pub Date : 1995-05-22 DOI: 10.1109/NAECON.1995.522021

J. Bankhead, D. Malec, M. Czeschin

引用次数: 3