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The ability to control the fresh-state properties of concrete in real-time provides greater control over processing and placing of concrete. This smart concreting techniq [...]
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2.
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Rohan, E.
The paper deals with the method of interpolation of the homogenized effective material parameters which are computed by solving local microscopic boundary value problems. [...]
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This paper describes a sensitivity analysis and spectral tuning method of selected design parameters of the large rotating systems. The method is based on the system deco [...]
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Engineering structures subjected to dynamic loading are often equipped with special devices proposed to suppress adverse motion. However, these installations are often d [...]
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5.
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Koudelka, P.
The Institute of Theoretical and Applied Mechanics gathers long time (from 1997) identification data and shear resistance data of soils into a database. The database make [...]
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6.
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Abstrakt: Long-term observation of bridges supported by bearings made of synthetic materials reveals a steady horizontal deformation increase of these elements. This proc [...]
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7.
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Zapoměl, Jaroslav
Abstrakt: Rotors belong to the most frequently used components of machine devices. In a number of cases they are coupled with the stationary part through hydrodynamical b [...]
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8.
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Nikiforov, A.
Mathematical model describing the vibratory impact motion of rotor and floating sealing ring is suggested. Hertz’s theory is used. The model allows studying the station [...]
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9.
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The St. Vitus Cathedral is a part of the cultural heritage of Czech nation. Tendency to preserve this great building leads to the monitoring of load-bearing structure of [...]
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10.
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Algorithm of locally weighted regression is presented in this contribution. Local approximator repeatedly uses the locally linear model based on least square method. Simu [...]
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11.
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There are mechatronic applications, where a slender beam or plate is subjected to static magnetic force generated by an electromagnetic actuator consisting of a solenoid [...]
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12.
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Squirrel cage induction motors are employed in various machines and means of transport mostly as traction motors. The usage of this type of motors in vehicles can be conn [...]
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Malenovský, E.
This contribution deals with the overview of methods, which are used for analysis of dynamic behavior of rotor dynamics systems. The main of background research topics ar [...]
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14.
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The paper deals with the engineer design of the levitation magnet for transport systems and magnetic bearings. The optimal solution for the minimum whole volume of the ir [...]
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The paper deals with a working prototype of a system for the active vibration control of journal bearings to prevent rotor instability due to the oil film. The controllab [...]
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16.
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Dupal, J.
The paper deals with a new approach to critical speed determination of rotors by means of the simple method against the so far used iterative method and a method utilizin [...]
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17.
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The vibration amplitude of rotors excited by imbalance can be significantly reduced if damping devices are inserted between the rotor and its stationary part. To achieve [...]
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18.
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Zapoměl, Jaroslav
Abstrakt: Properties of fluid film bearings are significantly influenced by the shape of the cross section of the holes in the bearing shells. In computational models the [...]
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19.
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The contribution deals with a mathematical model of bending vibrations of a slender flexible rotor, excited by unbalance when passing the critical speed. The analysed rot [...]
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20.
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Q-learning method proved to be usable in active magnetic bearing (AMB) control task, however the learning speed remains the main problem. Two-phase variant of the Q-learn [...]
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21.
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Control design of rotating shaft levitated by active magnetic bearing is described in this contribution. Genetic algorithm is used to design controller parameters. Depend [...]
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24.
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The tilting pad bearings are very often applied in high speed rotating machines. The exact solution of bearing characteristics, including the motion of tilting pads, is v [...]
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25.
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Zapoměl, J.
The rotor systems consit of two principal components, of a rotor and of a stationary part, and the fluid film bearings are often used as coupling elements. As the clearan [...]
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26.
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Flexural vibrations of rotating disk contain forward and backward traveling waves can be excited at certain speed of rotating disk also by a standing constant single poin [...]
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27.
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The paper deals with the modelling of balancing machine vibration and the identification of the stiffness and damping coefficients of oil-film bearings. The real balancin [...]
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The paper deals with the modeling and evaluation of stability conditions of the balanced rotating system with rigid discs supported on two anisotropic hydrodynamic bearin [...]
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30.
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Ferfecki, P.
For the purpose of efficient diagnostics of fault conditions the influence of transverse fatigue crack on dynamical behaviour of a rotor system supported by active magnet [...]
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31.
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Abstrakt: The impact motion of rigid rotor supported on passive magnetic bearings is studied. Impacts on passive magnetic bearings are investigated. Impacts occur in reta [...]
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32.
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The dynamic properties of rotor supported on passive magnetic bearings is investigated by means of numerical solution and by measurement on the prototype of experimental [...]
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