Architecture of Tools and Processes for Affordable Vehicles
J. Stodola*
Faculty of Military Technology, University of Defense, Brno, Czech Republic,
P. Stodola
Faculty of Economics and Management, University of Defense, Brno, Czech Republic
ABSTRACT: The focus of this paper is on the description of the recommended functional requirements for the software architecture that enables the integration of tools and processes for large scale affordable vehicles and propulsion systems. These include: integration, processes, tools, affordability, repeatability, sustainability, integrity etc. Prior to the discussion of the recommended functional requirements a brief description is given on the two types of integration environments (Monolithic Environments and Best Class Environments) along with a categorization of the different type of tools considered to be integrated within the environment. The four categories of tools addressed are Groupware, Project Management, Product Data Management or Product Lifecycle, and Engineering tools.
KEY WORDS: Software architecture, product and process representation, engineering tools, data, application
Integration of logistic systems intotransport services of region using road cargo transport
V. Cempírek* & A. Seidlová & J. Široký & P. Nachtigall & R. Kampf
Jan Perner Transport Faculty, University of Pardubice, Pardubice, Czech Republic
* Corresponding author: vaclav.cempirek@upce.cz
AbstraCt: The paper deals in the analytic part with problems of taxes and charges paid by users of road transport. Our team found out that those payments are lower than in railroad transport, so that toll system implementation can’t incite movement of transports from road to railroad. New partnerships between road and railroad companies can be set up here. This will lead to intermodal systems with savings on toll. Namely in domestic, but in the international transports first of all. The proposal part of intermodal system deals with systems like Mobiler and Cargo Domino or Modalohr and Cargo Beamer. The conclusion is a better region service technology and costs savings thanks to cooperation of road and railroad transport. Intermodal systems are destined for minimal hauling distance of 600 km in accompanied or unaccompanied transport.
KEY WORDS: Cargo system, logistic system, road, rail, transport.
Noise and Vibration Reduction – Cranktrain as the Main
Powertrain Module
P. Novotný* & V. Píštěk
Institute of Automotive Engineering, Brno University of Technology, Brno, Czech Republic,
* Corresponding author: novotny.pa@fme.vutbr.cz
ABSTRACT: Thepaper discusses how the multi-body dynamics approach combined with flexible body effects is being applied to predict the vibrations of crankshaft, bearing loads or cranktrain noise level due to structural flexibility. The oil film effects in the journal bearing are implemented with the use of a finite difference method. An application example of a Diesel inline four-cylinder engine is given in this paper to show this sophisticated simulation model and to predict the dynamic response of the flexible system and loads in the journal bearings.
KEY WORDS: noise, vibration, cranktrain, finite difference method, slide bearing model
Statistical Analysis of Impact of Selected Factors on the Rate of Accidents
R. Budský
AZIN CZ s. r. o., Prague, Czech Republic,
M. Koucký
miroslav.koucky@tul.cz
Abstract : The main purpose of the carried out statistical analysis was to find objective relationships between the indicators of traffic accidents in selected European countries and factors which are no doubts important for safety of road traffic like general prevention and the road traffic regulations, training and examination of new drivers, post-examination period, sanction system, technical parameters of roads and vehicles, and last but not least also influence of important social climate. In assessment of the results, also the index of corruption perception was considered which has proven as an important modifier of influence of the mentioned important factors.
KEY WORDS: Road accidents, analysis, influencing factors, index of corruption perception.
Decision processes in Communications Multi-path Access Systems applied within ITS
M. Svitek* & T. Zelinka*
Faculty of Transport Sciences, Czech Technical University of Prague, 110 00 Praha 1, Czech Republic
*Corresponding authora: svitek@fd.cvut.cz, zelinka@fd.cvut.cz
ABSTRACT: The paper presents multi-path communications access systems decision processes applied within ITS (Intelligent Transport System). Competent decision process based on precisely quantified system requirements using performance indicators tolerance range represent critical part of the ITS access communications system. Goal of the described process is to keep communications service continuously available with no influence of changing conditions in time and served space. Either family of CALM standards based system or specifically designed and configured L3/L2 switching represent relevant solution for such multi-path access communication system. Method of different paths service quality evaluation and selection of the best possible active communications access path is introduced. Proposed approach is based on Kalman filtering, which separates reasonable part of noise and also allows prediction of the individual parameters near future behavior. Presented classification algorithm applied on filtered measured data combined with deterministic parameters is trained using training data, i.e. combination of parameters vectors time line and relevant decisions. Classification process results are dependent on the size and quality of the training sets.
Scanning Electron Microscopy Method as a Tool for Evaluation of Selected Materials Microstructure
K. Pospíšil*, Aleš Frýbort, Aleš Kratochvíl and Jana Macháčková
Infrastructure and Environmental Division, CDV – Transport Research Centre, Brno, Czech Republic
* Corresponding author: karel.pospisil@cdv.cz
ABSTRACT: The paper introduces CDV’s research on microstructure evaluation of two selected materials used in pavements or structures, i.e. cement concrete and bitumen. As a main equipment it has been used Scanning Electron Microscope (SEM). In case of cement concrete there are described time-dependent changes in the microstructure of self-compacting concrete (SSC). The microstructures and differences in void and pore system of matured SSC with commonly used micro-fillers are also shown there. In case of bitumen the paper anticipates that the relationship among the composition, structure and usable properties of bitumen have not been clarified enough yet. The SEM method requires an appropriate preparation as the raw bitumen samples can not be watches directly. The oil fraction, precluding the observation, must be eliminated. Nevertheless its removal may cause a modification of the original structure. And this might consequently impact on the results of the observation.
KEY WORDS: SEM, microstructure, bitumen, concrete, cement