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  • 1.
    Abbas, Taimoor
    et al.
    Lund Univ, Elect & Informat Technol Dept, S-22100 Lund, Sweden..
    Sjöberg, Katrin
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Kåredal, Johan
    Lund Univ, Elect & Informat Technol Dept, S-22100 Lund, Sweden..
    Tufvesson, Fredrik
    Lund Univ, Elect & Informat Technol Dept, S-22100 Lund, Sweden..
    A Measurement Based Shadow Fading Model for Vehicle-to-Vehicle Network Simulations2015Ingår i: International Journal of Antennas and Propagation, ISSN 1687-5869, E-ISSN 1687-5877, artikel-id 190607Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The vehicle-to-vehicle (V2V) propagation channel has significant implications on the design and performance of novel communication protocols for vehicular ad hoc networks (VANETs). Extensive research efforts have been made to develop V2V channel models to be implemented in advanced VANET system simulators for performance evaluation. The impact of shadowing caused by other vehicles has, however, largely been neglected in most of the models, as well as in the system simulations. In this paper we present a shadow fading model targeting system simulations based on real measurements performed in urban and highway scenarios. The measurement data is separated into three categories, line-of-sight (LOS), obstructed line-of-sight (OLOS) by vehicles, and non-line-of-sight due to buildings, with the help of video information recorded during the measurements. It is observed that vehicles obstructing the LOS induce an additional average attenuation of about 10 dB in the received signal power. An approach to incorporate the LOS/OLOS model into existing VANET simulators is also provided. Finally, system level VANET simulation results are presented, showing the difference between the LOS/OLOS model and a channel model based on Nakagami-m fading.

  • 2.
    Andersson, Erik
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Bengtsson, Per-Johan
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Dark Ages Lunar Interferometer (DALI): Deployment-Rover - Mobility System2013Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Detta examensarbete är utfört i samarbete med Jet Propulsion Laboratory (JPL) i Pasadena, Kalifornien. JPL's primära funktion är konstruktion och drift av robotiserade rymdfarkoster. För tillfället har JPL 22 rymdfarkoster och 10 instrument i aktiva uppdrag.

    Den "mörka tiden" representerar den sista utposten i kosmologi, eran mellan uppkomsten av den kosmiska bakgrundsstrålningen (CMB) och bildandet av de första stjärnorna. Under den "mörka tiden", när universum inte var upplyst av någon stjärna, var den enda detekterbara signalen sannolikt från neutralt väte (HI).

    HI-absorptionen sker i mörk materia-dominerade överdensiteter, platser som senare blir födelseplatserna för de första stjärnorna. Att spåra denna utveckling kommer att ge viktiga insikter i egenskaperna hos mörk materia och eventuellt ge information om universums expansion. Detta kan åstadkommas med hjälp av ett radioteleskop på baksidan av månen. Den enda platsen i vårt solsystem avskärmad från störningar från jorden, och på natten även från solens strålning.

    Vår uppgift har varit att utveckla ett koncept på en autonom rover som ska placera ut ett stort antal lågfrekvensantenner på månytan. Detta är ett nödvändigt steg för det eventuella anläggandet av ett radioteleskop.

    Projektet vid Högskolan i Halmstad delades upp i tre delprojekt, där vårt ansvarsområde har varit att utveckla ett koncept för roverns drivsystem.

    Resultatet av projektet ett koncept på ett "Rocker-Bogie"-hjulupphängningssystem, skapad i en 3D-miljö. Ett koncept som har genomgått en serie av digitala analyser och simuleringar för att säkerställa överensstämmelse med krav och önskemål.

  • 3.
    Aramrattana, Maytheewat
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES). The Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden.
    Larsson, Tony
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Jansson, Jonas
    The Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden.
    Nåbo, Arne
    The Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden.
    Extended Driving Simulator for Evaluation of Cooperative Intelligent Transport Systems2016Ingår i: SIGSIM-PADS '16: Proceedings of the 2016 annual ACM Conference on SIGSIM Principles of Advanced Discrete Simulation, New York: ACM Digital Library, 2016, s. 255-278Konferensbidrag (Refereegranskat)
    Abstract [en]

    Vehicles in cooperative intelligent transport systems (C-ITS) often need to interact with each other in order to achieve their goals, safe and efficient transport services. Since human drivers are still expected to be involved in C-ITS, driving simulators are appropriate tools for evaluation of the C-ITS functions. However, driving simulators often simplify the interactions or influences from the ego vehicle on the traffic. Moreover, they normally do not support vehicle-to-vehicle and vehicle-to-infrastructure (V2X) communication, which is the main enabler for C-ITS. Therefore, to increase the C-ITS evaluation capability, a solution on how to extend a driving simulator with traffic and network simulators to handle cooperative systems is presented as a result of this paper. Evaluation of the result using two use cases is presented. And, the observed limitations and challenges of the solution are reported and discussed. © 2016 ACM, Inc.

  • 4.
    Aramrattana, Maytheewat
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES). Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden.
    Patel, Raj Haresh
    Communication Systems Department, EURECOM, Sophia-Antipolis, France.
    Englund, Cristofer
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS). RISE Viktoria, Gothenburg, Sweden.
    Härri, Jérôme
    Communication Systems Department, EURECOM, Sophia-Antipolis, France.
    Jansson, Jonas
    Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden.
    Bonnet, Christian
    Communication Systems Department, EURECOM, Sophia-Antipolis, France.
    Evaluating Model Mismatch Impacting CACC Controllers in Mixed2018Ingår i: 2018 IEEE Intelligent Vehicles Symposium (IV), IEEE, 2018, s. 1867-1872Konferensbidrag (Refereegranskat)
    Abstract [en]

    At early market penetration, automated vehicles will share the road with legacy vehicles. For a safe transportation system, automated vehicle controllers therefore need to estimate the behavior of the legacy vehicles. However, mismatches between the estimated and real human behaviors can lead to inefficient control inputs, and even collisions in the worst case. In this paper, we propose a framework for evaluating the impact of model mismatch by interfacing a controller under test with a driving simulator. As a proof- of-concept, an algorithm based on Model Predictive Control (MPC) is evaluated in a braking scenario. We show how model mismatch between estimated and real human behavior can lead to a decrease in avoided collisions by almost 46%, and an increase in discomfort by almost 91%. Model mismatch is therefore non-negligible and the proposed framework is a unique method to evaluate them. © 2018 IEEE.

  • 5.
    Bangalore Manjunath, Harsha
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Kumar, Santosh
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Designing of Kids Train2018Självständigt arbete på avancerad nivå (magisterexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Designing a Kids Train body and Chassis, where Body of a train plays an important role as it should be attractive, fun, educational, comfortable and safer for the kids. and the chassis should be able to withstand sufficient load and able to accommodate steering, battery, seating, motor, axles and bumper at all sides which is developed for SB international AB.A literature study is carried out to review various designs body of train and chassis, latest innovations and advanced materials used to manufacture the same. The various types of forces and stresses commonly acting on chassis structures are analyzed and their effects on the vehicle is understood and different types of train design is studied in order to make an attractive train for the kids by using Waterfall method to understand the concepts in designing a Train body. The pro-con analysis is conducted to evaluate merits and demerits of each alternative type of body of a train and the material to manufacture it. The most essential 

    design criteria are derived from the QFD (Quality function deployment) which then acts as important guidelines during the actual design process.Structural chassis frame is designed as per the design criteria with little modification and designing a body of a train using the CAD software CATIAV5R20 and the structural stability of the same is tested and analyzed using Inspire (solid thinking) software.

  • 6.
    Böhm, Annette
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Lidström, Kristoffer
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Jonsson, Magnus
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Larsson, Tony
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Evaluating CALM M5-based vehicle-to-vehicle communication in various road settings through field trials2010Ingår i: Proceedings - Conference on Local Computer Networks, LCN, (2010 12 01): 613-620, Piscataway, N.J.: IEEE Press, 2010, s. 613-620Konferensbidrag (Refereegranskat)
    Abstract [en]

    Future cooperative Intelligent Transport Systems (ITS) applications aimed to improve safety, efficiency and comfort on our roads put high demands on the underlying wireless communication system. To gain better understanding of the limitations of the 5.9 GHz frequency band and the set of communication protocols for medium range vehicle to vehicle (V2V) communication, a set of field trials with CALM M5 enabled prototypes has been conducted. This paper describes five different real vehicle traffic scenarios covering both urban and rural settings at varying vehicle speeds and under varying line-of-sight (LOS) conditions and discusses the connectivity (measured as Packet Reception Ratio) that could be achieved between the two test vehicles. Our measurements indicate a quite problematic LOS sensitivity that strongly influences the performance of V2V-based applications. We further discuss how the awareness of these context-based connectivity problems can be used to improve the design of possible future cooperative ITS safety applications.

  • 7.
    Cabanettes, Frederic
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS). Halmstad Univ, Sch Business & Engn, SE-30118 Halmstad, Sweden..
    Rosén, Bengt Göran
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS).
    Topography changes observation during running-in of rolling contacts2014Ingår i: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 315, nr 1-2, s. 78-86Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The automotive industry and the design of engines are strongly ruled by performance and legislation demands. In the valve train, besides the main function (transformation of rotation to translation movements) to fulfill, new requirements in environmental demands and performance in terms of wear are leading to more and more detailed studies of the cams and rollers. Wear reduction studies for prolonging lifetime of these components require decreasing the scale of observation down to roughness. Among the different wear stages of a component, the running-in is a crucial period which will greatly influence the lifetime and performance of components. The aim of this paper is to analyze the topography variations observed during the running-in of a camshaft on a valve train rig test. A truck engine's camshaft is run under realistic conditions and 3D surfaces are measured before and after the test by using relocation techniques. By measuring the very same surfaces before and after the experiment, a deep analysis of the running-in effects on surfaces can be performed. 3D surface roughness parameters are used in parallel with new proposed methods of analysis. As a result, the mechanisms involved during running-in are emphasized and can be used for further simulations and optimization of the cam roller contact. (C) 2014 Elsevier B.V. All rights reserved.

  • 8.
    Carpatorea, Iulian
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Slawomir, Nowaczyk
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Rögnvaldsson, Thorsteinn
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Elmer, Marcus
    Volvo Group Trucks Technology, Göteborg, Sweden.
    Lodin, Johan
    Volvo Group Trucks Technology, Göteborg, Sweden.
    Learning of Aggregate Features for Comparing Drivers Based on Naturalistic Data2016Ingår i: Proceedings: 2016 15th IEEE International Conference on Machine Learning and Applications (ICMLA) / [ed] Lisa O’Conner, Los Alamitos, CA: IEEE Computer Society, 2016, s. 1067-1072Konferensbidrag (Refereegranskat)
    Abstract [en]

    Fuel used by heavy duty trucks is a major cost for logistics companies, and therefore improvements in this area are highly desired. Many of the factors that influence fuel consumption, such as the road type, vehicle configuration or external environment, are difficult to influence. One of the most under-explored ways to lower the costs is training and incentivizing drivers. However, today it is difficult to measure driver performance in a comprehensive way outside of controlled, experimental setting.

    This paper proposes a machine learning methodology for quantifying and qualifying driver performance, with respect to fuel consumption, that is suitable for naturalistic driving situations. The approach is a knowledge-based feature extraction technique, constructing a normalizing fuel consumption value denoted Fuel under Predefined Conditions (FPC), which captures the effect of factors that are relevant but are not measured directly.

    The FPC, together with information available from truck sensors, is then compared against the actual fuel used on a given road segment, quantifying the effects associated with driver behavior or other variables of interest. We show that raw fuel consumption is a biased measure of driver performance, being heavily influenced by other factors such as high load or adversary weather conditions, and that using FPC leads to more accurate results. In this paper we also show evaluation the proposed method using large-scale, real-world, naturalistic database of heavy-duty vehicle operation.

  • 9.
    Dincay, Berkan
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    GPS/Optical Encoder Based Navigation Methods for dsPIC Microcontroled Mobile Vehicle2010Självständigt arbete på avancerad nivå (masterexamen), 30 poäng / 45 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Optical encoders are being widely suggested for precise mobile navigation. Combining such sensor information with Global Positioning System (GPS) is a practical solution for reducing the accumulated errors from encoders and moving the navigational base into global coordinates with high accuracy.

    This thesis presents integration methods of GPS and optical encoders for a mobile vehicle that is controlled by microcontroller. The system analyzed includes a commercial GPS receiver, dsPIC microcontroller and mobile vehicle with optical encoders. Extended kalman filtering (EKF), real time curve matching, GPS filtering methods are compared and contrasted which are used for integrating sensors data. Moreover, computer interface, encoder interface and motor control module of dsPIC microprocessor have been used and explained.

    Navigation quality on low speeds highly depends greatly upon the processing of GPS data. Integration of sensor data is simulated for both EKF and real time curve matching technique and different behaviors are observed. Both methods have significantly improved the accuracy of the navigation. However, EKF has more advantages on solving the localization problem where it is also dealing with the uncertainties of the systems.

  • 10.
    Fan, Yuantao
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Nowaczyk, Sławomir
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Rögnvaldsson, Thorsteinn
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Antonelo, Eric Aislan
    Federal University of Santa Catarina, Florianópolis, Brazil.
    Predicting Air Compressor Failures with Echo State Networks2016Ingår i: PHME 2016: Proceedings of the Third European Conference of the Prognostics and Health Management Society 2016 / [ed] Ioana Eballard, Anibal Bregon, PHM Society , 2016, s. 568-578Konferensbidrag (Refereegranskat)
    Abstract [en]

    Modern vehicles have increasing amounts of data streaming continuously on-board their controller area networks. These data are primarily used for controlling the vehicle and for feedback to the driver, but they can also be exploited to detect faults and predict failures. The traditional diagnostics paradigm, which relies heavily on human expert knowledge, scales poorly with the increasing amounts of data generated by highly digitised systems. The next generation of equipment monitoring and maintenance prediction solutions will therefore require a different approach, where systems can build up knowledge (semi-)autonomously and learn over the lifetime of the equipment.

    A key feature in such systems is the ability to capture and encode characteristics of signals, or groups of signals, on-board vehicles using different models. Methods that do this robustly and reliably can be used to describe and compare the operation of the vehicle to previous time periods or to other similar vehicles. In this paper two models for doing this, for a single signal, are presented and compared on a case of on-road failures caused by air compressor faults in city buses. One approach is based on histograms and the other is based on echo state networks. It is shown that both methods are sensitive to the expected changes in the signal's characteristics and work well on simulated data. However, the histogram model, despite being simpler, handles the deviations in real data better than the echo state network.

  • 11.
    Håland, Joel
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Höggren, David
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Project Bonesheart: A concept design project2016Självständigt arbete på grundnivå (högskoleexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Rapporten beskriver det examensarbete som eleverna tillsammans med företaget Bonesheartutförde på en genre av motorcyklar som kallas för Café racers och dess subgenre.Projektet handlar om hur utförandet av arbetet vid att ta fram flera designkoncept på dessanischade motorcyklar gick till. Hela vägen från brainstorming till det slutgiltiga resultatet.Rapporten beskriver hur projektmedlemmarna gick tillväga med den metodik som de lärt sigunder utbildningen och hur de delvis utvecklade och etablerade ett eget arbetssätt vidframtagningen av koncepten på motorcyklarna.Eftersom det är en genre av motorcyklar som inte berörts av denna typ av arbete förut, harinformationssamling varit en stor del i uppstarten av projektet. Bland annat gjordes ettenkätutskick till 140 motorcykelklubbar, vilket gav projektet en bra ståndpunkt att utgå ifrån. Detär kritiskt för ett arbete att det finns en förståelse för området och att man kan ta tillvara på denkunskap som samlats in för att få ett bra resultat.Det resultat som presenteras i denna rapport har utformats efter en designmetodik som tar tillvarapå flera faktorer. Till exempel de begränsningar som givits från företaget som var delaktig iprojektet och svar från enkätutskick.Med en bred mängd källor att hämta information ifrån har resultatet utformats till vad som blevkoncept på fyra stycken motorcyklar.

  • 12.
    Karlsson, Kristian
    et al.
    SP Technical Research Institute of Sweden, Borås, Sweden.
    Carlsson, Jan
    SP Technical Research Institute of Sweden, Borås, Sweden.
    Larsson, Marcus
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES). Qamcom Research and Technology AB, Gothenburg, Sweden.
    Bergenhem, Carl
    Qamcom Research and Technology AB, Gothenburg, Sweden.
    Evaluation of the V2V channel and diversity potential for platooning trucks2016Ingår i: 2016 10th European Conference on Antennas and Propagation (EuCAP), Piscataway: IEEE conference proceedings, 2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper gives results from Vehicle-to-Vehicle (V2V) communication field tests in a platoon consisting of four trucks. During these tests it was assumed that large vehicles such as trucks need multiple antennas to overcome shadowing and obstruction caused by the vehicle itself, trailers and other trucks in the platoon. Therefore, in the experiments the vehicles had one antenna in each side-view mirror, and each antenna was connected to an IEEE 802.11p radio transmitting at 5.9 GHz according to the ETSI ITS-G5 standard. The purpose of the tests was to estimate the V2V channel for trucks participating in a platoon and to investigate the potential of diversity for such cooperative application. Three communication schemes for diversity were evaluated: receive diversity, transmit diversity, and transmit in combination with receive diversity. Studies were performed for two different antenna configurations in three different environments (rural, highway and tunnel). © 2016 IEEE

  • 13.
    Kleyko, Denis
    et al.
    Luleå University of Technology, Luleå, Sweden.
    Hostettler, Roland
    Aalto University, Helsinki, Finland.
    Lyamin, Nikita
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Birk, Wolfgang
    Luleå University of Technology, Luleå, Sweden.
    Wiklund, Urban
    Umea Univ, Dept Biomed Engn & Informat, Umea, Sweden..
    Osipov, Evgeny
    Luleå University of Technology, Luleå, Sweden.
    Vehicle Classification using Road Side Sensors and Feature-free Data Smashing Approach2016Ingår i: 2016 IEEE 19th International Conference on Intelligent Transportation Systems (ITSC), Piscataway: IEEE , 2016, s. 1988-1993, artikel-id 7795877Konferensbidrag (Refereegranskat)
    Abstract [en]

    The main contribution of this paper is a study of the applicability of data smashing - a recently proposed data mining method - for vehicle classification according to the "Nordic system for intelligent classification of vehicles" standard, using measurements of road surface vibrations and magnetic field disturbances caused by passing vehicles. The main advantage of the studied classification approach is that it, in contrast to the most of traditional machine learning algorithms, does not require the extraction of features from raw signals. The proposed classification approach was evaluated on a large dataset consisting of signals from 3074 vehicles. Hence, a good estimate of the actual classification rate was obtained. The performance was compared to the previously reported results on the same problem for logistic regression. Our results show the potential trade-off between classification accuracy and classification method's development efforts could be achieved.

  • 14.
    Kostrzewski, Szymon
    et al.
    PMARlab, Department of Mechanics and Machine Design (DIMEC), University of Genova, Genova, Italy.
    Apputhanthri, Rusiru Dasantha
    PMARlab, Department of Mechanics and Machine Design (DIMEC), University of Genova, Genova, Italy.
    Masood, Jawad
    PMARlab, Department of Mechanics and Machine Design (DIMEC), University of Genova, Genova, Italy.
    Cepolina, Emanuela Elisa
    PMARlab, Department of Mechanics and Machine Design (DIMEC), University of Genova, Genova, Italy.
    Portable Mechatronic System for Demining Applications: Control Unit Design and Development2007Ingår i: The Fourth International Symposium: “Mechanical Demining”: Book Of Papers / [ed] Oto Jungwirth & Nikola Pavković, Zagreb, 2007, s. 27-30Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    A new participatory approach that makes use of and improves local end-users knowledge has been used to design a new portable mechatronic system for humanitarian demining applications in Sri Lanka, using power tillers as core module. They are very simple and versatile machines with large scale diffusion in developing countries, where they are commonly used for agriculture and transportation purposes. The system, composed by a tractor unit, a ground processing tool and a vegetation cutting tool is firstly introduced. The paper then focuses on the portable control unit allowing to control the machine from remote distance, in case unexploded ordnance or other fragmentation weapons are known to be present. The module allows forward motion by acting on the clutch, differential and acceleration of the power tiller; steering is controlled by additional brakes, mounted on the driving axle. Two wheels supporting the ground processing tool on the front of the machine are connected to the rear driving ones through tracks. The module can be fit to every kind of power tiller actuated by levers, using differential gear, after only little adjustments. The control is pneumatic and it is powered by the engine of the power tiller itself. The unit, like the others modules, responds to the requirements of safety, low-cost and simpleffectiveness.

  • 15.
    Lidström, Kristoffer
    et al.
    Viktoria Institute, Göteborg, Sweden.
    Sjöberg, Katrin
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Holmberg, Ulf
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Andersson, Johan
    Volvo Car Corporation, Göteborg, Sweden.
    Bergh, Fredrik
    Cybercom Group, Stockholm, Sweden.
    Bjäde, Mattias
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE).
    Mak, Spencer
    Innovation Team, Halmstad, Sweden.
    A modular CACC system integration and design2012Ingår i: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016, Vol. 13, nr 3, s. 1050-1061Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper describes the Halmstad University entry in the Grand Cooperative Driving Challenge, which is a competition in vehicle platooning. Cooperative platooning has the potential to improve traffic flow by mitigating shock wave effects, which otherwise may occur in dense traffic. A longitudinal controller that uses information exchanged via wireless communication with other cooperative vehicles to achieve string-stable platooning is developed. The controller is integrated into a production vehicle, together with a positioning system, communication system, and human–machine interface (HMI). A highly modular system architecture enabled rapid development and testing of the various subsystems. In the competition, which took place in May 2011 on a closed-off highway in The Netherlands, the Halmstad University team finished second among nine competing teams.

  • 16.
    Lindgren, Arne
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Development of Brake Cooling2016Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Sportbilar behöver effektiv bromskylning eftersom de ska prestera väl under hårda körförhållanden, som till exempel bankörning. De flesta sportbilar använder kanaler som fångar omgivande luftflöde och riktar detta flöde över bromsarna för att förbättra kylningen.  Detta projekt genomfördes i samarbete med Koenigsegg Automotive AB och syftar till att utveckla effektivare bromskylkanaler till deras bilar. Computational Fluid Dynamics användes för att analysera den konvektiva kylningen av bromsskivan och bromsbeläggen.  Först analyserades kylningen med den tidigare använda bromskylkanalen i syfte att skapa en referens. Sedan skapades nya koncept som analyserades och utvecklades i en iterativ process.  En konstruktion föreslås, som har inloppet i centrum av hjulaxeln och som sedan styr luften genom radiella kanaler till bromsskivan. Simuleringarna indikerar att den föreslagna konstruktionen resulterar i 14% högre värmeöverföringshastighet än den tidigare använda bromskylningslösningen.  Förutom kylkanalerna har några passiva kylanordningar också simulerats.  Simuleringar med dessa i kombination med den föreslagna konstruktionen, indikerar upp till 25% ökning av värmeöverföringshastigheten, men detta kan inte helt bekräftas på grund av begränsningar i den använda simuleringsmodellen.

  • 17.
    Torstensson, Martin
    et al.
    RISE Research Institutes of Sweden, Gothenburg, Sweden.
    Hai Bui, Thanh
    RISE Research Institutes of Sweden, Gothenburg, Sweden.
    Lindström, David
    RISE Research Institutes of Sweden, Gothenburg, Sweden.
    Englund, Cristofer
    RISE Research Institutes of Sweden, Gothenburg, Sweden.
    Duran, Boris
    RISE Research Institutes of Sweden, Gothenburg, Sweden.
    In-vehicle Driver and Passenger Activity Recognition2019Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Recognition of human behaviour within vehicles are becoming increasingly important. Paradoxically, the more control the car has (ie in terms of support systems), the more we need to know about the person behind the wheel [1] especially if he or she is expected to take over control from automation. A lot of focus has been devoted to research on the sensors monitoring the outside surroundings, but sensors on the inside has not received nearly as much attention. In terms of monitoring distractions, what is currently seen as dangerous (eg use of mobile phones) can in the future be seen as something good that helps to keep people awake in highly automated vehicles. Another reason for mapping activities inside the car is the often occurring mismatch between driver expectations and the reality of what today’s automated vehicles are capable of [2]. As long as the automation comes with limitations that impose a need for the driver to take over control at some point, it will be important to know more about what happens inside the vehicle. In this paper we describe the work performed within the ongoing DRAMA project1 to combine UX research with computer vision and machine learning to gather knowledge about what activities in a cabin can be mapped how they can be modelled to improve traffic safety and UX functionality.

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