The neurocomputing using of the development metamodels stage in the optimal surrogate antennas synthesis process
Journal Title: Вісник НТУУ КПІ. Серія Радіотехніка, Радіоапаратобудування - Year 2018, Vol 0, Issue 74
Abstract
Introduction. A computational developing metamodels technology for optimal antenna synthesis problems is proposed. This computational technology is created using methods of data mining, artificial intelligence and modern computer methods of experiment planning. To develop an approximation model, the mathematical apparatus of artificial neural networks, namely the RBF-network, is applied. Analysis of metamodels developing research. The computer experiment plan is performed with the help of Sobol’s $LP_\tau$-sequences $(\xi_1, \xi_2)$, which in the general case uniformly fill the points with the search space in the unit hypercube. Verification of the proposed technology is performed on test functions of the two variables goal. The obtained metamodels have rather high accuracy of approximation and improved computational efficiency. The created computing metamodels developing technology of provides high modeling speed which makes a possible realization of optimum antennas synthesis procedure. This technology is effective and correct for more complex problems of approximating multidimensional hypersurfaces. Metamodels developing. To develop the RBF-metamodel, an automatic and user-defined strategy with random sampling is used in the ratio: 70% - training, 15% - control, 15% - test. Training and control samples were used in the metamodel developing, and the test - for cross-verification. At the stage of training best neural networks selection was carried out by indicators: determination coefficient $R^2$; standard forecast error deviations ratio and learning data $S.D.ratio$; average relative model error magnitude MAPE,%; residual average squared error $MS_R$; residues histogram; scattering diagrams. Results of numerical experiments. Obtained metamodels for test functions $f_1(x,y)$ - RBF-2-130-1 (44); $f_2(x,y)$ - RBF-2-150-1 (6); $f_3(x,y)$ - RBF-2-185-1 (10) have a high enough approximation accuracy and improved computational efficiency. For these metamodels, we checked the adequacy and informativeness of Fisher's criterion. The results of metamodels checking adequacy calculations at the stage of response surface recovery are presented. The created computing metamodels developing technology provides a high simulation speed, which makes possible the implementation of the procedure for optimal antennas synthesis. This technology is effective and correct for more complex problems of multidimensional hypersurfaces approximation. Conclusions. The numerical experiments results analysis is evidence of the high efficiency of the proposed computing developing metamodels technology, which is created using methods of intellectual data analysis, artificial intelligence and modern computer experiment planning methods. The metamodels developing with its use are characterized by fairly high accuracy of approximation and improved computational efficiency. It is these advantages that allow their using with the optimal surrogate antennas synthesis.
Authors and Affiliations
V. Halchenko, R. Trembovetska
Keywords
Related Articles
- EP ID EP392099
- DOI 10.20535/RADAP.2018.74.60-72
- Views 68
- Downloads 0
Application of height platforms and technology of OFDM in the telecommunication systems of 4G
Questions of passing to the telecommunication systems of fourth generation with application of height platforms and technology of OFDM are considered. There are considered of power efficiency of these systems.
Air filled strip antenna array
Novel design of strip antenna array without dielectric substrate is presented. Antenna array can be used for WLAN applications.
Reliability of а radioelectronic equipment cells design at external mechanical influences
The influence of pressure in conclusions of microcircuits, microassembly, and in them solder connections, as result of action of external mechanical loadings – vibrations and impacts – on parameters of reliability of a c...
Adaptive filtration of parameters of the movement UAV according to sensor networks based on measurements of the received signal strength
Introduction. In modern conditions increasingly important begin to play unmanned aerial vehicles (UAVs), which give rise to a new class of threats. This leads to the need to develop security systems that solve tasks of d...
A technique of account of a thermal mode coolers of the processor of personal electronic computer
The mathematical model of process a thermal of the processor of personal electronic computer as system of two differential equations is offered. The generalized thermal circuit scheme is given. The analytical decision of...