Proceedings of 14th Digital Avionics Systems Conference最新文献_第2页

Fault protection architecture for the command and data subsystem on the Cassini spacecraft 卡西尼号航天器上指令和数据子系统的故障保护体系结构

Proceedings of 14th Digital Avionics Systems Conference Pub Date : 1995-11-05 DOI: 10.1109/DASC.1995.482823

T. Brown, J. Donaldson

引用次数: 3

Reliability issues for design and test of complex integrated circuits [in avionic systems] 复杂集成电路设计和试验的可靠性问题[航空电子系统]

Proceedings of 14th Digital Avionics Systems Conference Pub Date : 1995-11-05 DOI: 10.1109/DASC.1995.482826

L. Harrison, P. Saraceni

引用次数: 0

CH-47D computer graphics generated display monitor [for flight test visualization] CH-47D计算机图形生成显示显示器[用于飞行试验可视化]

Proceedings of 14th Digital Avionics Systems Conference Pub Date : 1995-11-05 DOI: 10.1109/DASC.1995.482913

H. Hoy, T. Lam

引用次数: 0

Digital modulation and demodulation within E-systems differential GPS transmitter and receiver 电子系统差分GPS发射机和接收机中的数字调制和解调

Proceedings of 14th Digital Avionics Systems Conference Pub Date : 1995-11-05 DOI: 10.1109/DASC.1995.482800

L. Huffman, S. Bullock

{"title":"Digital modulation and demodulation within E-systems differential GPS transmitter and receiver","authors":"L. Huffman, S. Bullock","doi":"10.1109/DASC.1995.482800","DOIUrl":"https://doi.org/10.1109/DASC.1995.482800","url":null,"abstract":"The FAA has recently made a commitment to implement GPS Landing Systems as the primary IFR capability for all public use approach and landing systems. As an interim step, private use GPS Landing Systems have been authorized to advance the learning curve. A primary capability of a Local Area Augmentation System (LAAS) is the requirement to uplink differential correction data from a ground station to airborne users. Since this technology is relatively new and is rapidly changing, a robust data link is needed that can be easily modified and updated without investment risk to both the user and the supplier. Further, the ever increasing demand by airlines to drive initial investment cost down, reduce life cycle maintenance costs, and to realize operational savings through lower weight, power, and size results in identification of a 'Software Radio' being a logical architecture choice. E-Systems has implemented this technology in government applications and has successfully transitioned this technology to commercial applications such as the SCAT-I VHF Data Link using D8PSK modulation. This paper discusses the general concepts of a 'Software Radio' and then focuses on D8PSK digital modulation and demodulation techniques. Other potential modulations are briefly discussed along with a summary of performance demonstrations.","PeriodicalId":125963,"journal":{"name":"Proceedings of 14th Digital Avionics Systems Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126094702","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

The input output unit for the attitude and articulation control subsystem on the Cassini spacecraft 卡西尼号航天器姿态和关节控制子系统的输入输出单元

Proceedings of 14th Digital Avionics Systems Conference Pub Date : 1995-11-05 DOI: 10.1109/DASC.1995.482920

E. Shalom

{"title":"The input output unit for the attitude and articulation control subsystem on the Cassini spacecraft","authors":"E. Shalom","doi":"10.1109/DASC.1995.482920","DOIUrl":"https://doi.org/10.1109/DASC.1995.482920","url":null,"abstract":"The Input Output Unit (IOU) for the Attitude and Articulation Subsystem (AACS) for the Cassini spacecraft uses an embedded microprocessor to format and interpret data packets sent over a bus with the electrical characteristics of MIL-STD-1553B. The IOU used available design and protocol elements when possible, and employed custom hardware and firmware elements when necessary. As a result, the hardware design of the IOU, including the design of a custom gate array, took place in a extremely short time. With extensive simulation and modeling of the design at both the chip and board level, design iterations were minimal, and there were no iterations of the gate array. The embedded microprocessor in the IOU provides great versatility and flexibility, and allowed the incorporation in many functions in firmware. For this reason, firmware design and verification were challenging linchpins of this effort. This I/O approach is a marked departure from approaches used on previous JPL spacecraft. It has resulted in significant changes in the interfaces of AACS peripherals and their integration at the subsystem level. Future trends are reinforcing this approach, with \"smart\" peripherals and instruments communicating over much higher bandwidth optical buses.","PeriodicalId":125963,"journal":{"name":"Proceedings of 14th Digital Avionics Systems Conference","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116679971","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

Channelization: the two-fault tolerant attitude control function for the Space Station Freedom 信道化:用于空间站自由的双容错姿态控制功能

Proceedings of 14th Digital Avionics Systems Conference Pub Date : 1995-11-05 DOI: 10.1109/DASC.1995.482922

P. Babcock

{"title":"Channelization: the two-fault tolerant attitude control function for the Space Station Freedom","authors":"P. Babcock","doi":"10.1109/DASC.1995.482922","DOIUrl":"https://doi.org/10.1109/DASC.1995.482922","url":null,"abstract":"The Space Station Freedom was comprised of \"utility\" systems, such as power generation and distribution, thermal management, and data processing, and \"user\" systems such as communication and tracking; propulsion, payload support, and guidance, navigation, and control. These systems are required to work together to provide various station functions. To protect the lives onboard and the investment in the station, the systems and their connectivity had to be designed to continue to support critical functions after any single fault for early assembly stages, and after any two faults for later stages. Of these critical functions, attitude control was the most global, incorporating equipment from nearly all major systems. The challenge was to develop an architecture, or integration, of these systems that would achieve the specified level of fault tolerant attitude control and operate, autonomously, for the three-month unmanned periods during the assembly process. Additionally, this architecture had to maintain the desired utility of the station for each stage of the assembly process. This paper discusses the approach developed for integrating these systems such that the fault tolerance requirements were met for all stages of assembly. Some of the key integration issues will be examined and the role of analysis tools will be described. The resultant design was a highly channelized one, and the reasons and the benefits of this design will be explored. The final design was accepted by the Space Station Control Board as the design baseline in July, 1992.","PeriodicalId":125963,"journal":{"name":"Proceedings of 14th Digital Avionics Systems Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127933632","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

GPS ground antenna and monitor station upgrades: system analysis and design GPS地面天线和监测站升级:系统分析和设计

Proceedings of 14th Digital Avionics Systems Conference Pub Date : 1995-11-05 DOI: 10.1109/DASC.1995.482833

J. Heckathorn, J. Lala, J. Prizant, L. Silver

引用次数: 0

T-bird II training system avionics T-bird II训练系统航空电子设备

Proceedings of 14th Digital Avionics Systems Conference Pub Date : 1995-11-05 DOI: 10.1109/DASC.1995.482817

J. Soderberg

引用次数: 0

GPS ground antenna and monitor station upgrades: software requirements analysis GPS地面天线和监测站升级:软件需求分析

Proceedings of 14th Digital Avionics Systems Conference Pub Date : 1995-11-05 DOI: 10.1109/DASC.1995.482832

L. Burkhardt, J. Heckathorn, J. Lala, L. Silver

{"title":"GPS ground antenna and monitor station upgrades: software requirements analysis","authors":"L. Burkhardt, J. Heckathorn, J. Lala, L. Silver","doi":"10.1109/DASC.1995.482832","DOIUrl":"https://doi.org/10.1109/DASC.1995.482832","url":null,"abstract":"This paper discusses the software aspects of the Global Positioning System (GPS) remote site modernization study, specifically, the software requirements analysis. At the beginning of the software requirements analysis phase, a qualitative trade-off study was performed to determine if a structured analysis or an object-oriented analysis (OOA) approach would be followed. The latter was chosen because it offers a number of advantages over the life-cycle of a software development project. This paper outlines these advantages. In conjunction with this methodology study, a study of Computer-aided Software Engineering (CASE) tools was performed to ascertain if available software requirements analysis and design tools would aid the software development process, in general, and requirements analysis, in particular. The results of this study are also summarized in this paper. The paper also discusses the experiences of Draper Laboratory software engineers in using OOA to perform software requirements analysis for a large software project (over 100,000 lines of Ada source code estimated), and how this approach was followed while specifying requirements using the Software Requirements Specification Data Item Description (DID) that accompanies DOD-STD-2167A.","PeriodicalId":125963,"journal":{"name":"Proceedings of 14th Digital Avionics Systems Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121636700","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

Traffic Alert and Collision Avoidance System (TCAS) transition program (TTP): a status update 交通警报和避免碰撞系统(TCAS)过渡程序(TTP):状态更新

Proceedings of 14th Digital Avionics Systems Conference Pub Date : 1995-11-05 DOI: 10.1109/DASC.1995.482819

R. P. Stead, G.P. Gambarani, D. Tillotson

{"title":"Traffic Alert and Collision Avoidance System (TCAS) transition program (TTP): a status update","authors":"R. P. Stead, G.P. Gambarani, D. Tillotson","doi":"10.1109/DASC.1995.482819","DOIUrl":"https://doi.org/10.1109/DASC.1995.482819","url":null,"abstract":"In response to United States (U.S.) law mandating installation, by December 31, 1993, of TCAS IT on all air carrier aircraft with more than thirty passenger seats operating in U.S. Airspace, the first in-service flight of a certified TCAS II production unit occurred in June 1990. Currently, worldwide installations of TCAS IT in air carrier and business aircraft are estimated at over 7,000 units. Total accumulated flight operations exceed 50 million hours, with over 1.5 million additional hours accumulated each month. This paper provides a status update on the TCAS Transition Program (TTP) which was established to monitor the operational performance and assist with the introduction of TCAS II avionics into the National Airspace System (NAS). The update is provided by means of a qualitative performance comparison between the software logic initially fielded (Version 6.02) and the latest version (Version 6.04A) developed to address various flight performance dynamics and interface issues between TCAS and the air traffic control (ATC) system. This latest software logic has been in operation in all TCAS II-equipped aircraft since January 1, 1995.","PeriodicalId":125963,"journal":{"name":"Proceedings of 14th Digital Avionics Systems Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134138411","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