Poslední příspěvky

  • Research to improve traction and dynamic quality of locomotives 

    Píštěk, Václav; Kučera, Pavel (JVE International, 2017-09-27)
    The article reviews and analyzes available theoretical and experimental studies aimed at improving the tractive and dynamic characteristics of locomotives. Based on the information received, the authors formulated the ...
  • SHAFT VIBRATION OF THE TRUCK 

    Kučera, Pavel; Píštěk, Václav (Brno University of Technology, 2017-05-15)
    This article describes analysis of vibrations in a powertrain of a truck with 8x8 drive. It may be caused by a deflection of the rotating drive shaft. The aim was to reduce the vibrations, therefore, a transient computational ...
  • Results of the experimental research of dynamic vibration processes of the rail for rolling stocks fault diagnostics 

    Píštěk, Václav; Kravchenko, Kostiantyn; Kučera, Pavel (JVE International, 2017-09-27)
    The paper discusses the preconditions of the methodology development of diagnosis system for assessing dynamic impact of the rolling stock on the basis of processing and analysis of data obtained in operation on the results ...
  • A Computational Model of Powertrain Components in Simulink 

    Kučera, Pavel; Píštěk, Václav (Brno University of Technology, 2014-05-12)
    The article deals with the development of a computational model of an engine, a transmission and a clutch. These parts of the powertrain were created using blocks from the libraries of the Simulink software while the input ...
  • Analyses of truck powertrain torque and vibration 

    Kučera, Pavel; Píštěk, Václav (JVE Intenational, 2017-05-30)
    The article deals with an analysis of the mean value of the torque of the truck with 8x8 drive. Torque was measured using a noncontact device on the powertrain shaft. This shaft is used to drive the first front axle. For ...
  • Measuring the yaw mass moment of inertia of vehicle 

    Hejtmánek, Petr; Blaťák, Ondřej; Kučera, Pavel; Porteš, Petr; Vančura, Jan (ČVUT-Praha, 2013-07-06)
    The paper describes the procedure of the vehicle yaw moment of inertia determination. The effect of the oscillation period measurement error onto total measurement error is analysed. The measurement stand for moment of ...
  • Truck vibrations caused by unbalanced rotating shaft 

    Kučera, Pavel; Píštěk, Václav (JVE International, 2016-08-31)
    This article presents an analysis of vibrations in drivetrain of an 8x8 truck caused by an unbalanced rotating drive shaft. This truck is also used in military and fire sphere. The aim was to reduce the vibrations affecting ...
  • MODERN TOOLS FOR VEHICLE DEVELOPMENT 

    Porteš, Petr; Kučera, Pavel; Píštěk, Václav; Fojtášek, Jan; Zháňal, Lubor (Brno University of Technology, 2017-05-15)
    The development of vehicles is constantly advancing, therefore, it is required to have more sophisticated tools for the development of a complete vehicle or its individual parts. This article describes modern tools used ...
  • AUTOMATIC DIFFERENTIAL LOCK CONTROL IN A TRUCK – STRAIGHT DRIVE 

    Kučera, Pavel; Píštěk, Václav; Porteš, Petr (Institute of Thermomechanics Academy of Sciences of the Czech Republic, 2016-05-09)
    The paper deals with the creation of control algorithm for locking differential of the truck. This algorithm is based on assumptions of the ZF ADM system and it is created using software Simulink-Stateflow. The article ...
  • Using spectral analysis for flat wheel detections 

    Píštěk, Václav; Kučera, Pavel (JVE International, 2017-09-27)
    The following article describes measurement data processing for detecting flat spots on wheels of railway cars. This type of defect usually causes significant impact wear of railway infrastructure that can lead to different ...
  • Thermal load non-uniformity estimation for superheater tube bundle damage evaluation 

    Naď, Martin; Jegla, Zdeněk; Létal, Tomáš; Lošák, Pavel; Buzík, Jiří (EDP Sciences, 2018-03-14)
    Industrial boiler damage is a common phenomenon encountered in boiler operation normally which usually lasts several decades. Since boiler shutdown may be required because of localized failures, it is crucial to predict ...
  • Evaluation of the technical condition of medium-sized boilers 

    Lošák, Pavel; Létal, Tomáš; Buzík, Jiří; Naď, Martin (EDP Sciences, 2018-03-14)
    The recent trend in the steam and electricity production has been both to increase the efficiency of the facility and to keep tightening legislation concerning emission limits. The lifetime of energy equipment is greatly ...
  • Comparison of torsional vibration dampers in terms of the dissipated power amount 

    Píštěk, Václav; Kučera, Pavel (JVE Intenational, 2018-05-22)
    Reducing of frictional losses between moving parts of drivelines is a permanently current topic for both conventional internal combustion engines and modern hybrid or electric drives. The application of low viscosity oils ...
  • Heavy-Duty Transmission Gear Shift Investigation by Virtual Prototypes 

    Prokop, Aleš; Kučera, Pavel; Řehák, Kamil (JVE Intenational, 2018-05-22)
    This paper deals with application of virtual prototype to the heavy-duty vehicles gearbox concept. Used methodology was developed and validated on the single stage gearbox concept. Afterwards the virtual prototype was ...
  • Testing of the Mechatronic Robotic System of the Differential Lock Control on a Truck 

    Kučera, Pavel; Píštěk, Václav (SAGE Publications, 2017-10-30)
    This article deals with testing the algorithm developed for autonomous control lock of the differential in a truck. Hardware for HIL testing of robotic systems or automotive systems is used and the proposed control algorithm ...
  • An unconventional rubber torsional vibration damper with two degrees of freedom 

    Píštěk, Václav; Kučera, Pavel; Kravchenko, Kostiantyn; Svída, David (JVE International, 2017-09-27)
    Rubber torsional dampers with one degree of freedom are a long-time proven tool for vibration damping in crank mechanisms, especially for passenger cars. Their advantages include, in particular, a relatively simple design ...
  • Torsional analysis of the engine computational model 

    Kučera, Pavel; Píštěk, Václav (JVE Intenational, 2017-12-17)
    The paper deals with basic behaviour and torsional analysis of the engine computational model. This computational model is assembled from own blocks which are created using the basic elements of Simulink software. The paper ...
  • Supplying system abrasive material with automatic dosing control 

    Píštěk, Václav; Kučera, Pavel (JVE Intenational, 2018-05-22)
    The article examines the work and key elements of the automated system for supplying abrasive material using a managed pneumatic dispensing. Proposed to manage the flow of abrasive material using continuous (for the case ...
  • Truck vibrations caused by rotating shaft deflection 

    Kučera, Pavel; Píštěk, Václav (JVE International, 2017-11-15)
    The article deals with the creation of a transient computational model of rotating shaft deflection. This model is used for analysis of vibrations in the truck powertrain with an 8x8 drive. This vehicle is intended for ...
  • A torsional vibration damper based on a serial viscoelastic coupling of its seismic mass 

    Píštěk, Václav; Kučera, Pavel; Svída, David; Beran, Martin (JVE Intenational, 2017-12-17)
    The design of dynamic torsional vibration dampers of piston internal combustion engines is generally based on the principle of a dynamic damper with one degree of freedom in which the coupling of the seismic mass of the ...

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