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Implementation of neural network controller for elastic two-mass system trained with full state feedback controller and state observer was presented in the paper.
This paper investigates the possibility of suppressing the effect of a priori uncertainty and nonlinear factors in technical plants using positioning systems with the help of adaptive control, synthesized using Lyapunov function based on an exo-model. Take note of dissipative adaptation and the presence of a boost in the adaptive signal whose degree is determined by the order of fast dynamics in the...
In this article different types of models used initially in complex technical systems designing are described, and examples of their definition using object-attributive language are given.
This paper is devoted to the comparison of the numerically simulated Chua's circuit and the real circuit. The aim of the research was to figure out the factors affecting the computer simulation accuracy, and to find the ways to improve it. It was discovered that the most influence is exerted by an inaccuracy of the nonlinear Chua's diode characteristic measurement, a numerical integration method used...
Recursive algorithm is proposed to generate the coefficient matrix for a system of ordinary differential equations describing non-stationary system service that does not require withdrawal of the general equation of a system of homogeneous differential equations. An example of its implementation and results of the mutual testing of analytical and simulation models of non-stationary system service.
If the drive is designed based on the requirements for efficiency, it is necessary to check out effectiveness of control methods and design solutions at the modeling stage. For this purpose numerical model should provide measurements of the instantaneous values of efficiency. This paper offers method which allows calculations of the instantaneous efficiency of permanent magnet synchronous machine...
This paper presents an approach for development of a diagnostic system on the base of a combination of different methods for fault detection, isolation and identification. The important place is given to algorithms of diagnostics by means of support vector machine (SVM) and fault detection estimator together with bank of fault isolation estimators (FDE-FIE). The idea of this approach is illustrated...
Modeling of numerical differentiation of position sensor signals is carried out. Formulas with variable number of terms of series are compared. Accuracy ranking for each equation is done.
This paper presents an approach for development of a diagnostic system on the base of ANFIS networks for creation of reference models of pneumatic servo-motor actuated control valve in the mode without faults. Detection, localization and identification of faults is carried out on the basis of the analysis of extreme values of residuals. The idea of this approach is illustrated on a practical example...
The article describes the method of risks calculation on all stages of project life cycle on the basis of application of the Bayesian networks. Programmatic realization of this method is carried out by the Hugin software package.
In article various approaches to measurement of efficiency of innovations and the problems arising at their measurement are considered, the system of an indistinct conclusion for the solution of a problem of obtaining recommendations about measurement of efficiency of innovations is offered.
Developed a method for computer analysis of the microparticles motion parameters along trajectories, based on the proposed A. A. Vavilov principle consistent disclosure of structural, parametrical and signal uncertainty. Signal uncertainty is caused by instrumental and methodological errors in the localization of microparticles position in the trajectories resulting from image processing. The difference...
The solution of polynomial equation systems is a problem frequently encountered by researchers in solving equations in specific derivatives, algebraic geometry and in optimization tasks. There exist various realizations of the Gröbner basis building method, but their serious disadvantage is the high complexity of calculations. Therefore, the algorithms currently employed for symbol-aided solutions...
Basic technologies for creation of predicative analytical core for industrial systems of decision-making processes supporting are considered. It is proposed to use architectural solutions based on international standards of Data Mining. Issues of mobility and computational efficiency of analytical technologies for Big Data are discussed.
In the present article is given the conception of vector multi-component physical value, are shown the measurement problems of informative components of multi-component displacements by optical method. Also are presented the Fundamentals of the named optical measurement values on the basis of the multidimensional test objects method.
The method of functions of Lyapunov synthesized inertialess adaptive algorithms of alarm and parametrical type for management of technical objects with limited uncertainty according to the scheme with the adjusted model. Expedient from the point of view of realization These algorithms don't change parameters and structures of regulators of systems, and will be connected directly to an entrance of...
The paper presents an analysis of directions of development of cognitive information technologies for mathematical education. Two aspects of the problem are highlighted, they are a simulation of mental processes of a student and a modeling of a subject area. The proposed concept of development of cognitive informational technologies is confirmed by a retrospective analysis of information technologies...
In the article problems of control in complex modern technical systems are considered. The main features of these systems are globality, large scalability, heterogeneity, situation uncertainty. The analysis of the existing approaches to solving given problem using self-organization methods and multiagent technology is carried out. The conclusion about necessity of development self-organizing systems...
The energy-information model of mineral resources enterprises' electrotechnical complexes have been considered. The main feature of the approach is the presence of "extended" system of equations based on the topological matrices with all necessary information about the technical state of the elements of electrotechnical complexes. The information is not only the numerical values of the variables,...
Fuzzy linear programming in portfolio selection is considered. Much attention is given to minimax regret criterion which allows minimizing the worst regret that may be undertaken by the decision maker. Regret-analysis is applied to get an optimal portfolio of branch indices.
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