Перегляд за автором "Romashov, Y."

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  • Зображення мініатюри
    Публікація
    A Generalised Mathematical Model of Electricity Consumption for Electric Drives in Smart Cities Applications
    (2025) Shevchenko, A.; Kolupaieva, I.; Romashov, Y.
    The generalised mathematical model of electricity consumption is developed by using electromechanical analogies and Lagrange's equations of 2-nd kind in the view of the system of two first order and one two order ordinary differential equations with the related initial conditions. It allows representing the dependency between supplied voltage and the electricity consumption of the electric drive. This mathematical model is for following researches directed to formulate and to solve the problem of the optimal control theory, so that it allows developing the energy efficient automated controls for electric drives required in smart cities applications
  • Зображення мініатюри
    Публікація
    Approaches to Functional Dependencies Representation for Industrial Automation Systems Mathematical Support
    (ХНУРЕ, 2022) Nienova, D.; Romashov, Y.
    The generalized approaches to representation of functional dependencies used in mathematical maintenance of the technological processes automation systems are proposed in this research. The principal idea of these approaches is in using the functional dependencies discrete form including the nodal values of a function corresponded to the primarily chosen nodes of the argument variable, and the linear interpolation is proposed to compute the required values of the represented function. These principal ideas allow us to have the generalized uniform approaches to representation of different functional dependencies used in mathematical maintenance of automated systems. The main difficulties in using of the functional dependencies discrete form are in not existing required data required to have this discrete form, and it is proposed to use the cubic spline interpolation for correct transformation of the primarily existing not full data to the data set providing the reliability of the linear interpolation. The shown example of using of the proposed approaches deals with estimating the temperature fields in the pellets of the ceramic nuclear fuel used taking into account the temperature dependences of its heat conductivity.
  • Зображення мініатюри
    Публікація
    Circular Concepts of Research Robotics for Small Scale Benchmarks in Automation Engineering of Smart Cities
    (2025) Tkalenko, M.; Kolupaieva, I.; Romashov, Y.
    The standardisation of the parts and the usage of the 3D printing are considered as the concepts allowing to develop the research robotics prototypes for benchmarks of engineering automation's solutions to implement in support smart cities applications. It allows to provide the Reduce and Reuse principles of the circular economy at present, but implementations of the Recycle principle required complementary technologies not fully accessed at present. Small scales of the robotics prototypes decrease exploitational energy consumptions during the researches, so that the related carbon emissions are decreased
  • Зображення мініатюри
    Публікація
    Potentiometer Sensors of an Angular Acceleration for Research Robots to Benchmark Smart Cities Applications
    (2025) Cherkashyn, M.; Kolupaieva, I.; Romashov, Y.
    The estimations of angular accelerations by means of the potentiometer sensors are considered in the context of the applications in small-scale research robotics prototypes for benchmarking of automation engineering's solutions to support full-scale implementations related with smart cities. It is proved, that potentiometer sensors are possible for instrumental estimations of angular accelerations, but it requires defining the first and second derivatives on the time of the measured voltage incorrect in Adamar's sense, so that it is necessary to propose the suitable regularisation approach to have reliable estimations for angular accelerations