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1996 IEEE Aerospace Applications Conference. Proceedings最新文献

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Software reliability assurance in early development phases: a case study in an industrial setting 早期开发阶段的软件可靠性保证:一个工业环境中的案例研究
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.499667
J. Slonim, M. Bauer, J. Ye
{"title":"Software reliability assurance in early development phases: a case study in an industrial setting","authors":"J. Slonim, M. Bauer, J. Ye","doi":"10.1109/AERO.1996.499667","DOIUrl":"https://doi.org/10.1109/AERO.1996.499667","url":null,"abstract":"The the quality (functionality and reliability) assurance testing of a new software product/release is a challenging task. Written from an industrial perspective, this paper provides an overview of the \"state of practice\" of the software industry, and then describes a study looking at the utility of code coverage to support and improve the testing process. The study involves the development of a new release of a large scale commercial product. We report on the information collected to date, what it reveals about testing in this environment and the tool that was used. We conclude with some lessons learned and directions for future work.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124661074","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
Commercial microelectronics technologies for applications in the satellite radiation environment 应用于卫星辐射环境的商用微电子技术
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495897
K. Label, M. Gates, A. Moran, P. Marshall, J. Barth, E. Stassinopoulos, C. Seidleck, C. Dale
{"title":"Commercial microelectronics technologies for applications in the satellite radiation environment","authors":"K. Label, M. Gates, A. Moran, P. Marshall, J. Barth, E. Stassinopoulos, C. Seidleck, C. Dale","doi":"10.1109/AERO.1996.495897","DOIUrl":"https://doi.org/10.1109/AERO.1996.495897","url":null,"abstract":"As spacecraft require reduced parameters such as power, weight, volume, and cost, while increasing performance requirements, enabling technologies have come to the forefront. We present data and design strategies for these enabling technologies in spacecraft.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131460192","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: 39
Video compression technique using wavelet transform 基于小波变换的视频压缩技术
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.499679
R. Adhami
{"title":"Video compression technique using wavelet transform","authors":"R. Adhami","doi":"10.1109/AERO.1996.499679","DOIUrl":"https://doi.org/10.1109/AERO.1996.499679","url":null,"abstract":"A new approach to video compression is presented which is based on the use of the wavelet transform and a differential image compression technique. The algorithm combines the scale reduction capabilities of the wavelet transform with the data reduction capabilities of the differential image compression. Experimental results of applying the differential wavelet transform at different threshold levels to a computer generated animated sequence are presented.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133817134","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
Designing experiments for controller perturbation theories-an example 控制器摄动理论的实验设计-一个例子
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495889
A.L. White, Hagbae Kim
{"title":"Designing experiments for controller perturbation theories-an example","authors":"A.L. White, Hagbae Kim","doi":"10.1109/AERO.1996.495889","DOIUrl":"https://doi.org/10.1109/AERO.1996.495889","url":null,"abstract":"Recent theoretical results have extended the reliability analysis for real-time digital control systems to cover temporary periods of controller misbehavior. Previously, reliability analyses assumed the controller always had to be in control, and periods of controller misbehavior were either ignored or declared to be system failure. It is possible, however, for a system to survive repeated controller perturbations because of plant dynamics. System inertia can prevent an incorrect command from leading to immediate catastrophe, and this time lag gives the controller an opportunity to recover. Recent advances place this idea on a quantitative basis by deriving results for the basic control criterion of asymptotic stability in terms of matrix norms. Translating a theoretical result into a laboratory experiment poses numerous problems and possibilities. We present the results of the experiment inducing some transmission perturbations on communication cable due to radiating EMI in the reverberation chamber. We consider four topics such as (i) parameter observation, (ii) predictive ability, (iii) asymptotic stability, and (iv) field data.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133544137","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
The Laser Interferometer Gravitational-Wave Observatory (LIGO) project 激光干涉引力波天文台(LIGO)项目
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.499402
D. Coyne
{"title":"The Laser Interferometer Gravitational-Wave Observatory (LIGO) project","authors":"D. Coyne","doi":"10.1109/AERO.1996.499402","DOIUrl":"https://doi.org/10.1109/AERO.1996.499402","url":null,"abstract":"The Laser Interferometer Gravitational Wave Observatory (LIGO), a USA National Science Foundation sponsored project being performed jointly by the California Institute of Technology and the Massachusetts Institute of Technology, is one of a new class of astronomical instruments designed to probe the Universe by detecting gravitational waves. Signal characteristics and expected event rates for these sources are discussed. A brief history of interferometric gravitational wave detectors and reference to ongoing and collaborative international projects is also provided. LIGO will consist of two widely separated sites at which L-shaped vacuum systems, each with two 4 km long arms, will house interferometers for coincident detection of gravitational waves. The initial LIGO detector consists of 3 interferometers, two at one site and one at the other. Each interferometer measures the motion of freely suspended and seismically isolated masses induced by a GW. Correlations among the three interferometers will be used to eliminate events due to terrestrial noise. The LIGO facilities are designed to be extensible with the intent to add and upgrade interferometers in the future.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132609997","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: 13
The new millennium program: management challenges in the 21st century 新千年计划:21世纪的管理挑战
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495965
E. Casani
{"title":"The new millennium program: management challenges in the 21st century","authors":"E. Casani","doi":"10.1109/AERO.1996.495965","DOIUrl":"https://doi.org/10.1109/AERO.1996.495965","url":null,"abstract":"NASA's New Millennium Program (NMP) will accelerate the infusion of technologies into its space and Earth science missions of the 21st century. The program plans a series of technology-validation flights in the 1998-2000 time frame, anticipating a rate of two flights per year, which will demonstrate technologies for deep space and Earth-orbiting missions. In tandem with developing and validating new technologies, NMP is also undertaking new management approaches, particularly in the area of team partnership between government and industry. A novel application of the concept of integrated product development teams (IPDTs) is being pursued, one in which cross-organizational teams, made up of members from government, industry, and academia, create roadmaps for development of the high payoff technologies that NMP intends to flight validate. The IPDT approach is expected to reduce cost and improve product. This paper discusses the management challenges that must be addressed today in order to more efficiently undertake space exploration and Earth observation in the 21st century: the new millennium.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114139055","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 method for the reduction of waveform distortion 一种减少波形失真的方法
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.496061
J. Gramling
{"title":"A method for the reduction of waveform distortion","authors":"J. Gramling","doi":"10.1109/AERO.1996.496061","DOIUrl":"https://doi.org/10.1109/AERO.1996.496061","url":null,"abstract":"A novel approach to minimizing or eliminating waveform distortion is presented. The method may apply to inverters that produce AC power with a sinusoidal waveform and also to other generators and amplifiers that supply an alternating voltage waveform (for example, an audio signal). Any impedance between the source and the load will reduce the output voltage in relation to the current drawn by the load. If this current is not in direct relation to the applied voltage (that is, it is leading or lagging or non-linear), then the subtraction voltage (the instantaneous current times the source/transmission impedance) will result in a distortion of the applied voltage. Various algorithms and both hardware and software solutions are discussed.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116645568","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
The S/X-band microwave feed system for NASA's first beamwaveguide antenna NASA首个波束波导天线的S/ x波段微波馈电系统
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495877
F. Manshadi
{"title":"The S/X-band microwave feed system for NASA's first beamwaveguide antenna","authors":"F. Manshadi","doi":"10.1109/AERO.1996.495877","DOIUrl":"https://doi.org/10.1109/AERO.1996.495877","url":null,"abstract":"This paper reports on configuration, detail design, and performance of the dual S/X-band microwave feed system for the first Deep Space Network (DSN) beamwaveguide (BWG) antenna. By using existing spare components, simplifying the design of new components, and using new fabrication techniques and material, this feed system was implemented successfully with a small budget and a very tight schedule. The measured noise temperature of the feed systems is 17.5 Kelvin for S-band and 24.0 Kelvin for X-band, which agrees very closely with the predicted performance.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115012421","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
Minimizing passive intermodulation product generation in high power satellites 最大限度地减少高功率卫星中无源互调产品的产生
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.496060
G.H. Schennum, G. Rosati
{"title":"Minimizing passive intermodulation product generation in high power satellites","authors":"G.H. Schennum, G. Rosati","doi":"10.1109/AERO.1996.496060","DOIUrl":"https://doi.org/10.1109/AERO.1996.496060","url":null,"abstract":"The evolution of high power multi-channel communication and direct broadcast (DBS) satellites with transmit and receive functions combined into a single antenna typically result in a source of interference which must be controlled. This source of interference is passive intermodulation products (PIMs) which are formed when two transmit carriers beat together to generate harmonics that fall into the receive band. This paper describes how PIMs were initially generated in high power Ku-band antennas on the Intelsat VIIA satellite program and the extraordinary methods used to suppress them. The method used to measure PIM levels is described and the test data results that demonstrate the performance achieved is given.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121319102","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: 14
Information system model applications to global mobile personal communication systems 信息系统模型在全球移动个人通信系统中的应用
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495984
R. Taylor
{"title":"Information system model applications to global mobile personal communication systems","authors":"R. Taylor","doi":"10.1109/AERO.1996.495984","DOIUrl":"https://doi.org/10.1109/AERO.1996.495984","url":null,"abstract":"Information system models provide direction, goal clarification and organization, and aid in the selection of a technology during the concept and development stages of projects. Information system models introduced include a Top-Down Model, an Open Systems Interconnect (OSI) model, an Input-Process-Output (IPO) Model, a Hardware-Software-Media (HSM), and a technology analysis grid. The evolution of information system service is discussed to demonstrate the usefulness of the information system models. Investigations in worldwide communications systems revealed a demand for services such as voice, fax, data communication, and paging in remote locations and on a global scale. Several Global Mobile Personal Communication System (GMPCS) satellites are in early development stages, and financed by multinational consortiums.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124308658","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
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