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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.
51

Modelování a HIL simulace ovládání pátých dveří osobního automobilu / Modelling and HIL Simulation of Vehicle Boot Door Control

Musil, Filip January 2017 (has links)
This diploma thesis focuses on an analysis, a model creation and simulations of a car boot door mechanism. The problem was analyzed on the basis of real measurements made on three different vehicles. Based on the measurements, computational models describing the real system at different levels of complexity were created. Matlab/Simulink was used to create and calculate the models. The output of the thesis is the simulator of a car boot door which also includes simplified model of a control unit. The simulator should provide an approximation of current and kinematic quantities of these mechanisms. The model is implemented on dSPACE platform that allows real-time simulations. The simulator can be modified in terms of changing the parameters of the mechanism and modifying some of its results.
52

Dynamic Architectural Simulation Model of YellowCar in MATLAB/Simulink Using AUTOSAR System

Soltani, Saeed 28 September 2016 (has links)
The YellowCar at the professorship of computer engineering of TU Chemnitz is a demonstration vehicle. The car is equipped with multiple networked Electronic Control Unit (ECU)s. There are regular software and hardware updates. Before introduction of any new update, it is essential to test the behavior of the car. This can be done through simulation. Since the majority of the ECU in YellowCar are AUTOSAR based, several AUTOSAR simulation tools can be used to do so. However non-AUTOSAR ECU applications can still not be simulated in these tools. Moreover simulating with such tools need the whole application to be implemented and also very expensive. Simulink is one of the most powerful tools for the purpose of Model-in-the-Loop (MIL) testing which is a popular strategy in the embedded world. The scope of this Master thesis is analyzing the YellowCar and its architecture to develop a dynamic Simulink architectural model that can be modified and extended to facilitate future updates. The outcome of this thesis is an implementation of a model for the YellowCar which allows both AUTOSAR and non-AUTOSAR ECUs to be simulated as one system. Also the model supports extension by easy addition of new modules like ECU or sensor through a graphical user interface.
53

Le millet perlé sucré et le sorgho sucré comme cultures énergétiques en conditions québécoises : potentiel de production, utilisation de l'azote, morphologie des racines et apport de carbone au sol

Thivierge, Marie-Noëlle 23 April 2018 (has links)
Le millet perlé sucré [Pennisetum glaucum (L.) R.BR.] et le sorgho sucré [Sorghum bicolor (L.) Moench] sont des cultures annuelles dont la sève sucrée peut être transformée en éthanol. Ces cultures semblent avoir des besoins limités en azote, mais leur efficacité d’utilisation de l’azote n’a pas été démontrée dans les conditions de l’est du Canada. De plus, la morphologie des systèmes racinaires de ces espèces a peu été étudiée, alors qu’elle pourrait fournir des explications concernant l’efficacité d’utilisation de l’azote. Les objectifs de cette étude étaient de (i) comparer le millet perlé sucré et le sorgho sucré quant à leur rendement et leur utilisation de l’azote (N), (ii) déterminer la réponse des deux espèces à des doses croissantes d’azote minéral, (iii) comparer leur réponse à l’azote minéral et l’azote de source organique (lisiers de porc et de bovin), (iv) comparer leurs traits racinaires et ceux du maïs-grain (Zea Mays L.), l’espèce actuellement utilisée pour produire de l’éthanol dans l’est du Canada, et (v) comparer l’apport en carbone au sol de ces trois espèces. Les espèces ont été cultivées à deux sites expérimentaux situés au Québec. Les doses d’azote favorisant les plus hauts rendements en sucres chez le millet et le sorgho ont été de 86 et 91 kg N ha-1, selon le site. La fertilisation minérale a généré des rendements plus élevés que l’utilisation de lisiers, lesquels ont montré une efficacité fertilisante variant de 15 à 52 % de celle de l’engrais minéral. Le sorgho a donné des rendements en sucres 68 % plus élevés que ceux du millet. Le millet et le sorgho ont récupéré dans leurs parties aériennes 54 à 82 % de l’azote minéral appliqué. Alors que la biomasse racinaire et l’apport annuel en carbone ont été supérieurs pour le maïs, la longueur des racines et la proportion de racines très fines étaient plus élevées pour le millet perlé sucré et le sorgho sucré. Les résultats démontrent la haute efficacité avec laquelle le millet et le sorgho utilisent l’azote ainsi que les faibles risques environnementaux associés, et suggèrent que la morphologie racinaire contribue à cette efficacité. / Sweet pearl millet [Pennisetum glaucum (L.) R.BR.] and sweet sorghum [Sorghum bicolor (L.) Moench] are annual crops from which the sweet sap can be fermented to ethanol. They appear to have a high nitrogen (N) use efficiency, but this remains to be demonstrated in eastern Canada. Studying the morphological traits of their rooting system could help understanding their N use efficiency. The main objectives of this study were to (i) compare both species for yield and N use efficiency, (ii) determine their response to increasing mineral N rate, (iii) compare their response to mineral vs. organic N sources (liquid swine and liquid dairy manures), (iv) compare their root morphological traits with those of grain corn (Zea Mays L.), the sole feedstock used for ethanol production in eastern Canada, and (v) compare annual carbon input to soil from these three species. Species were grown at two experimental sites in Quebec. The N rates that led to maximum sugar yield for sweet pearl millet and sweet sorghum were 86 and 91 kg N ha-1, depending on site. Mineral N fertilization resulted in greater yields than the liquid manures, which showed fertilizer N equivalences varying from 15 to 52%. Fifty-four to 82% of applied mineral N fertilizer was recovered in the aboveground biomass of sweet pearl millet and sweet sorghum. While root biomass and annual carbon input were greater with corn, the length of the rooting system and the proportion of very fine roots were greater with sweet pearl millet and sweet sorghum. Our results show a high N use efficiency of sweet pearl millet and sweet sorghum, and therefore indicate low environmental risk associated with their fertilization. Moreover, our results suggest that the peculiar root morphology of these crops contribute to their high N use efficiency.
54

Bulk Creation of Data Acquisition Parameters

Kupferschmidt, Benjamin 10 1900 (has links)
ITC/USA 2010 Conference Proceedings / The Forty-Sixth Annual International Telemetering Conference and Technical Exhibition / October 25-28, 2010 / Town and Country Resort & Convention Center, San Diego, California / Modern data acquisition systems can be very time consuming to configure. The most time consuming aspect of configuring a data acquisition system is defining the measurements that the system will collect. Each measurement has to be uniquely identified in the system and the system needs to know what data the measurement will sample. Data acquisition systems are capable of sampling thousands of measurements in a single test flight. If all of the measurements are created by hand, it can take many hours to input all of the required measurements into the data acquisition system's setup software. This process can also be extremely tedious since many measurements are very similar. This paper will examine several possible solutions to the problem of rapidly creating large numbers of data acquisition measurements. If the list of measurements that need to be created already exists in an electronic format then the simplest approach would be to create an importer. The two main ways to import data are XML and comma separated value files. This paper will discuss the advantages and disadvantages of both approaches. In addition to importers, this paper will discuss a system that can be used to create large numbers of similar measurements very quickly. This system is ideally suited to MILSTD- 1553 and ARINC-429 bus data. It exploits the fact that most bus measurements are typically very similar to each other. For example, 1553 measurements typically differ only in terms of the command word and the selected data words. This system allows the user to specify ranges of data words for each command word. It can then create the measurements based on the user specified ranges.
55

AATIS AND CAIS DATA RECORDING

Gaddis, William R. Jr, Sandland, Sawn 10 1900 (has links)
International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada / DOD flight test centers need affordable, small-format, flight-qualified digital instrumentation recording solutions to support existing and future flight testing. The Advanced Airborne Test Instrumentation System (AATIS) is today's primary data acquisition system at the Air Force Flight Test Center (AFFTC). Digital Recorder (DR) 1995 is planned to provide full support for AATIS output capabilities and satisfy initial recording requirements for the Common Airborne Instrumentation System (CAIS). The follow-on to the AATIS, the CAIS is a tri-service development to satisfy future DOD flight test data acquisition requirements. DR 2000 is planned as the future recording solution for CAIS and will be able to fully satisfy the 50 Mbps recording requirement. In the developments of DR 1995 and DR 2000, commonality and interoperability have emerged as significant issues. This paper presents an overview of these recording solutions and examines commonality and interoperability issues.
56

Data Relay System for Space Shuttle and Payload Pre-Launch Checkout

O'Donnell, Hugh B., Wise, Thomas E., Ngo, David Q. 10 1900 (has links)
International Telemetering Conference Proceedings / October 26-29, 1987 / Town and Country Hotel, San Diego, California / Engineering requirements and design characteristics of the coherent throughput relay system which supports East Coast pre-launch checkout of NASA's Space Shuttle and its Payloads are presented. The Relay system is required to provide communications through NASA's Tracking and Data Relay Satellite System for the Shuttle and Payload-Users while they are encapsulated in the launch preparation facilities at the John F. Kennedy Space Center and the Eastern Test Range, Florida. The Relay system is required to be transparent to its users' data at all rates up to three MB/s at S-band and 300 MB/s at Ku-band. Noise and group-delay distortion are major contributors to wide band RF signal degradation. These were major factors in the Relay system design. Antenna design, pointing angle and location were constrained by the need to maximize end-to-end RF signal isolation at both S-band and KU-band, simultaneous forward and return frequencies. System characteristics and link analysis are also presented. In addition, a similar Data Relay located at Vandenberg Air Force Base is briefly described.
57

A NEW 1553 ALL-BUS INSTRUMENTATION MONITOR

Berdugo, Albert, Ricker, William G. 11 1900 (has links)
International Telemetering Conference Proceedings / October 29-November 02, 1990 / Riviera Hotel and Convention Center, Las Vegas, Nevada / Increased data throughput demands in military and avionics systems has led to the development of an advanced, All-Bus MIL-STD-1553 Instrumentation Monitor. This paper discusses an airborne unit which acquires the information from up to 8 dual-redundant buses, and formats the data for telemetry, recording or real-time analysis according to the requirements of IRIG-106-86, Chapter 8. The ALBUS-1553 acquires all or selected 1553 messages which are formatted into IRIG-compatible serial data stream outputs. Data is time tagged to microsecond resolution. The unit selectively transmits entire or partial 1553 messages under program control. This results in reduced transmission bandwidth if prior knowledge of 1553 traffic is known. The ALBUS also encodes analog voice inputs, discrete userword inputs and multiplexed analog (overhead) inputs. The unit is provided in a ruggedized airborne housing utilizing standard ATR packaging,
58

A SOFTWARE APPROACH TO MARS-II DIGITALLY RECORDED TELEMETRY

Hart, Dennis L. 11 1900 (has links)
International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada / The MARS-II digital recorder is one of the new technologies that will eventually replace the labor intensive and hardware dependent methods associated with traditional analog-based telemetry ground systems. The Standardized MARS-II Analysis and Reduction Tool (SMART) is one of the first software systems developed to take advantage of this new digital recording capability. It processes pulse code modulated (PCM) encoded data and MIL-STD-1553B message traffic, outputting time-tagged PCM frames or 1553 messages to file. The goal of this software is to provide a portable application that utilizes state-ofhe-art, general purpose hardware for rapid telemetry data processing to meet the needs of operational users, telemetry engineers, and data analysts. To satisfy these goals, the software was developed using the C language with VMS and OSF operating systems as the initially targeted platforms. In addition, an X Window System/Motif graphical user interface supporting three tiers of user interaction (operator, telemetry engineer, and telemetry analyst) was layered onto the decommutator functions.
59

DATA ACQUISITION, ANALYSIS, AND SIMULATION SYSTEM (DAAS)

Baca, Dawnielle C. 10 1900 (has links)
International Telemetering Conference Proceedings / October 17-20, 1994 / Town & Country Hotel and Conference Center, San Diego, California / The Data Acquisition, Analysis, and Simulation System (DAAS) is a computer system designed to allow data sources on spacecraft in the Flight System Testbed (FST) to be monitored, analyzed, and simulated. This system will be used primarily by personnel in the Flight System Testbed, flight project designers, and test engineers to investigate new technology that may prove useful across many flight projects. Furthermore, it will be used to test various spacecraft design possibilities during prototyping. The basic capabilities of the DAAS involve unobtrusively monitoring various information sources on a developing spacecraft. This system also provides the capability to generate simulated data in appropriate formats at a given data rate, and to inject this data onto the communication line or bus, using the necessary communication protocol. The DAAS involves Serial RS232/RS422, Ethernet, and MIL-STD-1553 communication protocols, as well as LabVIEW software, VME hardware, and SunOS/UNIX operating systems.
60

POST-FLIGHT 1553 MESSAGE REDUCTION AND PROCESSING SYSTEM

Reinsmith, Lee V. 10 1900 (has links)
International Telemetering Conference Proceedings / October 17-20, 1994 / Town & Country Hotel and Conference Center, San Diego, California / This paper describes the application software used in the Message Processing System at the Air Force Development Test Center (AFDTC), Eglin AFB. The focus is on the Alpha AXP application software designed and developed to log, process, and reformat IRIG Chapter 8 1553 data. The main data reduction and editing capabilities of the processing phase are explained: message output selection, message output sampling, message translation, error identification, and IRIG Chapter 8 time editing. The design of and methods used to produce the output files, the BBNProbe STD file, and the 1553 message summary report are described. This software’s flexibility and comprehensiveness in processing, reducing, and re-formatting 1553 message data will enable AFDTC to satisfy current and future post-mission processing requirements.

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