Begell House Inc.
Journal of Automation and Information Sciences
JAI(S)
1064-2315
49
9
2017
Algebraic Interaction Theory and Cyber-Physical Systems
1-19
10.1615/JAutomatInfScien.v49.i9.10
Alexander A.
Letichevsky
V.M. Glushkov Institute of Cybernetics of National Academy of Sciences of Ukraine, Kiev
new cyber-physical model
systems
algebraic interaction theory
hybrid and time automata
modeling
verification methods
overview
A new model of cyber-physical systems is considered. The model generalizes known models like hybrid and time automata. The application of modeling and verification methods accumulated in the field of programming to the development of cyber-physical systems is discussed.
On Mathematical Models of the Dynamics of Three-Dimensional Elastic Bodies. Part 2. Bodies with Discretely Observable Initial Boundary Condition
20-28
10.1615/JAutomatInfScien.v49.i9.20
Vladimir Antonovich
Stoyan
Kyiv National Taras Shevchenko University, Kyiv, Ukraine
Stepan T.
Danysh
Kiev National Taras Shevchenko University, Kiev
three-dimensional elastic bodies
dynamics problem modeling
arbitrary initial boundary conditions
arbitrary geometric configuration
root mean square accuracy modeling
Based on the integral representation of solutions of differential mathematical models of the stable dynamics of spatially unlimited elastic medium in the Lame form an integral mathematical model of the initial boundary problem of the dynamics of an elastic body of arbitrary geometric configuration with arbitrary initial boundary conditions is constructed. The cases of both the spatial unlimited body and time interval, on which its dynamics is modeled, are considered. The constructed mathematical models, exactly satisfying classical mathematical models of three-dimensional theory of elasticity, according to the root mean square criterion, are agreed with the observations of its initial boundary state. The root mean square accuracy of modeling the initial boundary observations of a modeled object is estimated. These observations are defined in discretely determined surface-time points. The uniqueness conditions of researched mathematical modeling are also given in this paper.
Synthesis of Algorithms for Spacecraft Attitude Control Based on Generalizations of the Direct Lyapunov Method
29-41
10.1615/JAutomatInfScien.v49.i9.30
Victor V.
Volosov
Institute of Space Research of National Academy of Sciences of Ukraine and National Space Agency of Ukraine, Kyiv
Vladimir N.
Shevchenko
Institute of Space Research of National Academy of Sciences of Ukraine and National Space Agency of Ukraine, Kyiv, Ukraine
spacecraft attitude control
generalizations of the direct Lyapunov method
spacecraft attitude control systems
synthesis
computer modeling
The well-known generalizations of the direct Lyapunov method for investigation of the stability of invariant sets of dynamic systems are applied to the problem of synthesis of spacecraft (SC) attitude control. Generalizations of the existing algorithms of SC attitude control and stabilization with respect to an inertial coordinate system (CS) are obtained. New algorithms of SC attitude control and stabilization with respect to a rotating (orbital) CS are proposed. The corresponding algorithms for an inertial CS are particular cases of these algorithms. The efficiency of the algorithms is illustrated by computer modeling of the dynamics of SC attitude control systems.
Analysis of Perishable Queuing-Inventory System with Different Types of Requests
42-60
10.1615/JAutomatInfScien.v49.i9.40
Agasi Zarbali ogly
Melikov
Institute of Control Systems of National
Academy of Sciences of Azerbaijan, Baku
Leonid A.
Ponomarenko
International Research and Training Center of Information Technologies and Systems of National Academy of Sciences of Ukraine and Ministry of Education and Science of Ukraine, Kiev, Ukraine
Mamed Oktay ogly
Shahmaliyev
National Aviation Academy of Azerbaijan, Baku (Azerbaijan)
models of perishable queuing-inventory systems
the presence of different types of requests
stocks replenishment
exact and approximate methods
accuracy of the model
numerical experiment
Models of the systems of service with perishable stocks under the presence of different types of requests are proposed. It is foreseen that some requests after completion of their service do not buy stocks. Time of the requests service and time of stocks replenishment are positive random values. The policy of refreshment belongs to a class of two levels. The exact and approximate methods for determination of main characteristics of the suggested models are developed. High accuracy of the adduced formulas is shown by means of numerical experiment.
Algorithms for Constructing a Model of the Noisy Process by Correcting the Law of its Distribution
61-75
10.1615/JAutomatInfScien.v49.i9.50
Telman Abbas ogly
Aliev
Institute of Control Systems of National Academy of Sciences of Azerbaijan, Baku (Azerbaijan)
Naila Fuad kyzy
Musaeva
Azerbaijan University of Architecture and Construction, Institute of Control Systems of National Academy of Sciences of Azerbaijan, Baku (Azerbaijan)
Bahruz Ismail ogly
Gazizade
Institute of Control Systems of National Academy of Sciences of Azerbaijan, Baku (Azerbaijan)
noisy process probabilistic model
mathematical expectation
variance
mean-square deviation
distribution density function
The authors have constructed the algorithms for building a noisy process probabilistic model consisting of probabilistic models of useful component and noise. A set of such characteristics of noise and a useful component as mathematical expectations, variance, mean-square deviations, distribution density functions and their maxima as well as inflection points along x-axis and y-axis obtained at different periods of time has been formed. It has been demonstrated that the use of these sets in an automated control system allows us to determine a moment of routine maintenance to be performed and thereby to avoid a process shutdown required to carry out a comprehensive overhaul.
Reducing Level of Life of the Rural Population in Ukraine: the Result of Two Crises
76-82
10.1615/JAutomatInfScien.v49.i9.60
Alexander A.
Bitter
Lvov National Ivan Franko University, Lvov
Bogdan B.
Batyuk
Stepan Gzhitskiy National University of Veterinary Medicine and Biotechnologies, Lvov
Ekaterina M.
Hirniak
Stepan Gzhitskiy National University of Veterinary Medicine and Biotechnologies, Lvov
rural population in Ukraine
reducing level of life
event of crisis
deterioration of the main economic indicators
main directions of improving the living standards
The assessment of changes in the living standards of the rural population of Ukraine as a result of two crises: the world financial year 2008 and internal crisis of 2014–2016 is given. The deterioration of the main economic indicators, in particular GDP and average wages, has been established. Significant changes in the economic behavior of rural households have been identified: if in the 90s of the last century they have increased their production in private auxiliary farms in the event of crisis, then there is no such trend in recent years. The main directions of improving the living standards of the rural population are given.