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The method principal component (PCA) allows to allocate from a matrix of these several objects with a large amount of signs only 1–3 vectors containing 90–95% of information. Usually measuring problem of assessment of these main components is solved by the iterative NIPALS procedure or the algebraic SVD procedure, however both of these methods often give ambiguous estimates. For the purpose of elimination...
The paper describes a new scalable algorithm called NSLP for high-dimension, non-stationary linear programming problem solving on the modern cluster computing systems. The algorithm consists of two phases: Quest and Targeting. The Quest phase calculates a solution for the system of inequalities defining the constraint system of the linear programming problem under the condition of the input data dynamic...
The article deals with set-valued state estimation for linear dynamical systems. Set-valued estimation consists of a construction of feasible sets, which are guaranteed to contain all state vectors. The known set-valued state estimation algorithms include performing set operations like Minkowski sum and set intersection, those are computationally complex. Feasible set approximation with canonical...
The article is dedicated to the investigation of adequacy of a new conversion function model for a vortex sonic flowmeter, proposed by the authors using the Monte-Carlo method. The Monte Carlo method is a numerical one used for solving mathematical problems by modeling random variables. During the study, the parameters of the data simulating the measuring information of the vortex sonic flowmeters...
The application of single crystals in acousto-, opto-, micro — and nanoelectronics defines strict requirements to crystals and crystal elements as well as the need for certification of these products. The use of single crystals in acousto-, opto-, micro — and nanoelectronics defines strict requirements both to crystals and crystal elements, and it concurrently defines the need for the certification...
The use of various associated features in evaluating the form and location of surfaces and axes of engineering components leads to significant differences in the values of the deviations obtained. Analysis of this influence, advantages and disadvantages of individual types of associated elements, as well as a criterion for their selection is considered in this paper.
Many parametric models are used for equally distributed random variables (without taking into account the time dependence of the onset of the system event from covariates). The Weibull's distribution is considered to be practically justified for statistical analysis in technical systems. However, there is a problem of distribution parameters finding. The accuracy of distribution parameters's estimates...
The article describes a method for identifying the production defects of high-precision positioning systems using principal component analysis. This approach is necessary to determine the presence and a production defect type of the end product. The basis of the developed approach is the use of the principal components projection method and the classification method of k-means. The program was developed...
This paper describes an industrial close-range photogrammetric system that is being developed by the authors. We describe the system's architecture based on an iterative scheme, which allows using fast heuristic point matching algorithms with the follow-up result verification. We also describe the design of our multi-functional coded targets that allow using those algorithms. Besides, this design...
The authors highlight that stationary condition monitoring systems for high-voltage equipment is an essential prerequisite of the Smart-Grid implementation in the industrial electric networks. Diagnostic systems commissioning is relevant for network and electric furnace transformers of iron and steel works. The system operation performance is deteriorated because of lack of the methods intended for...
The paper offers mathematical models and software for electromagnetic calculations in conducting plate with flaws (cuts). It solves the problem of the influence of one or more straight line intersecting in one point of flaws on eddy currents and electromotive force (EF) induced in a coil with current. The coil is located above the nonmagnetic infinite plate orthogonally to the lines of flaws. Under...
This paper considers a method for detecting faulty elements in a linear phased array by means of set near-field probes. Using the asymptotic correspondence for two- and three-dimensional problems of the antenna theory leads to simpler mathematical models for the vertical dipoles array. A numerical study of mathematical models is based on the iterative regularization of the ill-posed problem of reconstructing...
We conducted a comprehensive study using the spectrophotometric complex “Cary 5000” with the accessories “DRA” and “UMA”. We used this complex to obtain accurate, high-precision results for different material types, especially for single crystal optical materials in the range of the wave-length from 250 to 3500 nm in polarized light with different types of polarization and non-polarized light, in...
The problem of the technical diagnostics of measuring channels under the conditions of information introduction and measurement systems in terms of complex safety is considered. The purpose of the study is to build models for creation and evaluation of the effectiveness of the systems that ensure the safety of the technical diagnostics of measuring channels based on a systematic approach to the accounting...
The article deals with a robust photogrammetric method to measure the geometric parameters of large scale objects with axial symmetry. The method is based on measuring the 3D-coordinates of the centers of circular retroreflective targets placed on the object in planes perpendicular to the axis of symmetry with the minimum moment of inertia. There has been developed a two-stage outlier filtering algorithm...
The method based on the solution of a problem of any gap disintegration is offered. It is based on the consecutive solution of the classical equations of small water on the equal plane by the Godunov's method taking into account the influence of current vertical heterogeneity when calculating streams through borders of the cells adjoining step borders. The accounting of vertical heterogeneity is provided...
In case of the decision of the task of design of automated control systems for crucial objects, a minimum possible level of risks at uncontrollable interference in the processes of functioning of these systems, and also minimization of negative consequences from a similar interference in the course of its operation are required. In connection with this, on the basis of the system theory of conflict...
In this paper we developed the algorithm for the automatic tracking of unmanned aircraft for image sequence based on correlation filtering to improve the efficiency of conducting objective control and simulation in Matlab and C#. The measurement results showed good convergence of the theoretical and experimental data. The advantage of this approach is the possibility to use it in real-time through...
The paper describes and compares some approaches to the use of measurement results for control using the classical feedback principle. The application of a linear control law based on the state vector estimates obtained with the use of the Kalman filter and the minimax filter is described. There are methods for control quality improving by means of the preliminary processing of measurements and another...
This study is focused on the application of the forecast results obtained with the help of a dual-parametric neural network for measuring instruments calibration within a limited range. In this report describing our study we intend to give a theoretical overview of the previous research on the subject. We also consider the learning algorithms for interval neural networks with hidden layer weights...
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