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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

RUGGED AND RELIABLE COTS STORAGE SOLUTIONS FOR DATA ACQUISITION SYSTEMS

Tsur, Ofer 10 1900 (has links)
International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, Nevada / Due to the rotating mechanism in mechanical disks, they cannot provide the top-level reliability required for operation in harsh military environments. This paper describes three COTS alternatives to mechanical disks: ruggedized mechanical disks, solid-state flash disks and stacked PC Cards. It discusses their cost-effectiveness and aspects such as environmental specifications, endurance and data reliability. It highlights several methods used by flash disks to enhance endurance and reliability, as well as flash pricing and density trends. It presents data security requirements in actual emergency situations, and how flash disks can meet these requirements. It concludes with a feature-by-feature comparison of ruggedized disks, flash disks and stacked PC Cards.
2

TRENDS IN COTS STORAGE SOLUTIONS FOR DATA ACQUISITION SYSTEMS

Tsur, Ofer 10 1900 (has links)
ITC/USA 2005 Conference Proceedings / The Forty-First Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2005 / Riviera Hotel & Convention Center, Las Vegas, Nevada / This paper discusses data storage requirements for data acquisition systems, and evaluates the ability of three of the most popular COTS data storage solutions - mechanical disk, ruggedized mechanical disk and solid-state flash disk - to meet these requirements today and in the future. It addresses issues of capacity, data reliability, endurance, form factor, cost and security. It concludes with a discussion of trends to implement high-speed serial interfaces in data acquisition systems, and the challenges that these trends pose for COTS storage solutions.
3

DIGITAL DATA RECORDING: NEW WAYS IN DATA PROCESSING

Mueller, Guenter 10 1900 (has links)
International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / With the introduction of digital data recorders new ways of data processing have been developed. The three most important improvements are discussed in this paper: A) By processing PCM Data from a digital recorder by using the SCSI-Interface our ground station has developed software to detect the synchronization pattern of the PCM data and then perform software frame decommutation. Many advantages will be found with this method. B) New digital recorders already use the CCSDS Standard as the internal recording format. Once this technique is implemented in our ground station’s software and becomes part of our software engineering team’s general know-how, the switch to CCSDS telemetry in the future will require no quantum leap in effort. C) Digital recorders offer a very new application: Writing data to a digital tape in the recorder’s own format, allows the replay of data using the recorder’s interfaces; i.e. writing vibration data from the host system to tape, using the analog format of the digital recorder, allows the analysis of the data either in analog form, using the analog interface of the recorder, or in digital form.
4

VME Based Ground Stations at Mcdonnell Douglas Aerospace Flight Test

Taylor, Bruce A. 11 1900 (has links)
International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada / The ability to dynamically configure our ground stations to support a wide array of fighter/attack aircraft programs has lead McDonnell Douglas Aerospace (MDA) to seek alternatives to commercially available ground stations. Cost effectiveness and fast response time to these widely varying needs is paramount to staying competitive in today's current defense environment. VME (Versa Modular European) architecture has provided a platform that fulfills these requirements while requiring a minimum of in house designs which can be expensive and time consuming to implement. MDA is now in its third generation of VME based ground systems. These systems are highly extensible due to their reliance on software and programmable hardware systems and are inexpensive due to their use of commercial grade VME cards. This paper describes the current generation TM/Quicklook Ground Station and the Data Editor (Preprocessor) Station and it also provides a perspective of how the designers solved some common problems associated with VME architecture. These stations are now in use at MDA test sights in St. Louis, Patuxent River NAWC, Edwards AFB, and Eglin AFB.
5

Parallel computing: from SCSI network to Internet. / CUHK electronic theses & dissertations collection / Digital dissertation consortium

January 2000 (has links)
by Vincent Sau Yan Yiu. / "April 2000." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2000. / Includes bibliographical references (p. 126-131). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.
6

Bridging of SCSI to SATA and Implementationof a SATA Controller using Virtex-5 / Bryggning mellan SCSI och SATA samt implementering av en styrenhet för SATA på en Virtex-5

Landström, Erik January 2009 (has links)
<p>Companies and authorities of today often handle large amount of data, not unusually with a restricted content which should be kept secret from outsiders. One way of accomplish this is to encrypt stored data in real time. For this a hardware solution is ideal since it can be independent, fast enough, and easily added to already existing systems.</p><p>This report is a starting point to achieve this with two of the most common mass storage standards SATA and SCSI in focus. It is based on the task to develop a FPGA based SATA controller and investigate the possibility to ”speak” SCSI with SATA devices.</p><p>The working process has involved theoretical studies, system design, test driven development using simulations and hardware tests and technical investigation.</p><p>The thesis resulted in a SCSI-to-SATA translation investigation pointing out difficulties and presenting a translation model. A SATA host was also implemented in VHDL on a Virtex-5 FPGA that can execute a number of SATA commands on different devices. Simulations performed shows that the total latency reaches one <em>μ</em>s/32 bits in the SATA host and that should not be much of a problem for most applications in a possible bridge solution. </p>
7

Förbättring av elsystemet på en bilsimulator

Karlsson, Magnus January 2007 (has links)
<p>Sammanfattning</p><p>Den här rapporten beskriver hur en förbättring av ett elektroniksystem i en bilsimulator gjordes. Några signaler som behövs för vanlig körning var redan anslutet till simulatorn. Syftet med detta projekt var att göra det lättare att göra ändringar i både hårdvara och mjukvara i framtiden men även vara en hjälp om det skulle uppstå problem. Fler knappar och spakar till simulatorn har anslutits för att den på så sätt ska bli mer flexibel vid val av olika funktioner vid en simulering. Kopplingsschema behövdes för att enkelt förklara hur allt är uppkopplat. Många funktioner behövs för att få in signaler till simulatormjukvaran och de var i utgångsläget utspridda på olika ställen. Om ett fel skulle uppstå är det mycket lättare att ha allt på ett ställe och det ger dessutom ett mer professionellt intryck. Därför samlades de flesta elektriska funktioner på en plexiglasskiva i motorrummet.</p><p>Först kommer kraven och lite bakgrundsinformation att tas upp. Därefter tas lösningarna på problemen upp. Slutligen kommer en diskussion och förslag på ytterligare förbättringar.</p> / <p>Abstract</p><p>This thesis describes how an improvement of the electrical system in a car simulator was made. Some signals important for basic driving were already installed. The purpose of this project was to connect the remaining input functions and to facilitate further hardware/software changes and problem solving in the simulator. Some additional functions were connected to the simulator software to make the simulator more flexible in the use of buttons and other input devices. Most of the original and new functions were gathered on a Plexiglas plate and a wiring diagram on the connections was made to explain how all functions were connected. When problems appear it is convenient to have all functions at the same place and it also looks more professional.</p><p>First in this thesis all the requirements and some background information will appear . After this the solutions are described and finally there is a discussion part with proposals on further development of the simulator with respect to the electrical functions.</p>
8

Förbättring av elsystemet på en bilsimulator

Karlsson, Magnus January 2007 (has links)
Sammanfattning Den här rapporten beskriver hur en förbättring av ett elektroniksystem i en bilsimulator gjordes. Några signaler som behövs för vanlig körning var redan anslutet till simulatorn. Syftet med detta projekt var att göra det lättare att göra ändringar i både hårdvara och mjukvara i framtiden men även vara en hjälp om det skulle uppstå problem. Fler knappar och spakar till simulatorn har anslutits för att den på så sätt ska bli mer flexibel vid val av olika funktioner vid en simulering. Kopplingsschema behövdes för att enkelt förklara hur allt är uppkopplat. Många funktioner behövs för att få in signaler till simulatormjukvaran och de var i utgångsläget utspridda på olika ställen. Om ett fel skulle uppstå är det mycket lättare att ha allt på ett ställe och det ger dessutom ett mer professionellt intryck. Därför samlades de flesta elektriska funktioner på en plexiglasskiva i motorrummet. Först kommer kraven och lite bakgrundsinformation att tas upp. Därefter tas lösningarna på problemen upp. Slutligen kommer en diskussion och förslag på ytterligare förbättringar. / Abstract This thesis describes how an improvement of the electrical system in a car simulator was made. Some signals important for basic driving were already installed. The purpose of this project was to connect the remaining input functions and to facilitate further hardware/software changes and problem solving in the simulator. Some additional functions were connected to the simulator software to make the simulator more flexible in the use of buttons and other input devices. Most of the original and new functions were gathered on a Plexiglas plate and a wiring diagram on the connections was made to explain how all functions were connected. When problems appear it is convenient to have all functions at the same place and it also looks more professional. First in this thesis all the requirements and some background information will appear . After this the solutions are described and finally there is a discussion part with proposals on further development of the simulator with respect to the electrical functions.
9

Bridging of SCSI to SATA and Implementationof a SATA Controller using Virtex-5 / Bryggning mellan SCSI och SATA samt implementering av en styrenhet för SATA på en Virtex-5

Landström, Erik January 2009 (has links)
Companies and authorities of today often handle large amount of data, not unusually with a restricted content which should be kept secret from outsiders. One way of accomplish this is to encrypt stored data in real time. For this a hardware solution is ideal since it can be independent, fast enough, and easily added to already existing systems. This report is a starting point to achieve this with two of the most common mass storage standards SATA and SCSI in focus. It is based on the task to develop a FPGA based SATA controller and investigate the possibility to ”speak” SCSI with SATA devices. The working process has involved theoretical studies, system design, test driven development using simulations and hardware tests and technical investigation. The thesis resulted in a SCSI-to-SATA translation investigation pointing out difficulties and presenting a translation model. A SATA host was also implemented in VHDL on a Virtex-5 FPGA that can execute a number of SATA commands on different devices. Simulations performed shows that the total latency reaches one μs/32 bits in the SATA host and that should not be much of a problem for most applications in a possible bridge solution.
10

A NEW GENERATION OF DATA RECORDERS BASED ON DLT TECHNOLOGY

Thames, Fred 10 1900 (has links)
International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California / As the performance of inexpensive commercial off-the-shelf (COTS) data storage devices continues to increase, the temptation to use them as the basis for data capture products for military and industrial applications becomes ever more compelling. For example, the Digital Linear Tape (DLT) format now offers a 270 Gigabits per cassette capacity at a sustained transfer rate of 40 Mbits/s – performance which would have cost tens or even hundreds of thousands of dollars per system just a few years ago. But to transplant such a device from its benign office habitat into a data capture product which will function reliably and consistently in a wide range of field and platform environments is an engineering task fully as difficult and complex as designing an environmentally robust recorder from scratch. This paper discusses the problems which typically have to be overcome; environmental protection, reliability, data integrity, power supplies, software issues, control and data interfacing, etc., citing practical examples of analog and digital DLT-based data recorders which are now entering service for telemetry, intelligence gathering, anti-submarine warfare and related applications

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