2687-0517 4 252 2016

RAR RUS 7-18 Bevzenko Ivan ivan-bevzenko@yandex.ru Investigation of the Behavior of Ultrashort Pulses in Multiwire Structures with Inhomogeneous Dielectric Filling The paper presents the results of studying the behavior of ultrashort pulses in multiwire structures with inhomogeneous dielectric filling. Five different versions of the structures where the modal phenomena may appear have been investigated. These phenomena may be a reason why the safety devices malfunction, or, on the contrary, can be used as a protection against electromagnetic interference. Several variants of creating the modal antipodes have been studied. This may be achieved by the following: changing the location of the conductors in the middle layer of the multilayer printed circuit board; changing the permittivity of the environment; increasing the dielectric layer thickness; filling the internal cavities with the dielectric; changing the location of the conductors in the cable. 10.5862/JCSTCS.252.1 621.391.28 modal phenomena ultrashort pulses inhomogeneous dielectric filling printed circuit boards and cables multiple structures https://infocom.spbstu.ru/article/2016.51.1/ 1_7_18.pdf

RAR RUS 19-28 Belyaev Yakov designcenter.spb@mail.ru Andryakov Yury andryakov.ya@yandex.ru Anikina Anna anna.a.anikina@gmail.com Architecture Selection and Parameter Calculation of a Capacitive Digital-to-Analog Converter for a Micromechanical Accelerometer The article consider the procedure of selecting the architecture for a capacitive digital-to-analog converter (DAC) used in a successive approximation analog-to-digital converter (SAR ADC) for a micromechanical accelerometer. In comparison with the existing methods, the proposed method is based on analyzing not only the technical and technological requirements of the IC but also the technical requirements of the sensor, layout restrictions, and on calculating the parameters of the DAC. The proposed method has been used in SAR ADC design for a charge-balanced capacitive micromechanical accelerometer with measurement range of 10 g and threshold of sensitivity of 0.02 g for the bandwidth of 300 Hz. The presented method can be used in the early design stage for DAC architecture selection used in SAR ADC. 10.5862/JCSTCS.252.2 621.3.049.77 capacitive DAC successive approximation analog-to-digital converter (SAR ADC) micromechanical accelerometer DAC architecture https://infocom.spbstu.ru/article/2016.51.2/ 2_19_28.pdf

RAR RUS 29-42 Borodulin Roman Using Conceptual Models of Numerical Electrodynamical Methods for Analyzing the Characteristics of Vibrators in Infinite Dissipative Media The article presents the results of a study on the refined properties of vibrators of different electrical lengths placed in a homogeneous dissipative medium (medium with losses), depending on the parameters of these media. Advanced numerical methods of ‘full-field’ electrodynamics, such as the method of moments, the finite element method and the finite-difference time-domain method were used for the first time for finding the current distribution and the current phase of vibrators. The developed conceptual models of dipole antennas immersed in endless dissipative environment are suitable for numerical simulation in known software packages, or for proprietary algorithms. The current and the current phase distributions along the surface of vibrators found by using these models are compared with the experimentally measured ones. We have described the techniques and the calculation results for finding the current area, the effective length of vibrators, their effective area and the impedance using a variety of methods. We have reached practical conclusions on the properties of submerged vibrators. We have performed a correct analysis of the numerical methods used. The results presented in the article can be used for finding the electrical characteristics of antennas of arbitrary shape, including those placed in a dissipative medium, by modern numerical methods. 10.5862/JCSTCS.252.3 004.942 DISSIPATIVE MEDIUM METHOD OF MOMENTS FINITE ELEMENT METHOD FINITEDIFFERENCE TIME-DOMAIN METHOD CONCEPTUAL MODEL CURRENT DISTRIBUTION PHASE DISTRIBUTION OF CURRENT DENSITY SURFACE CURRENT EFFECTIVE LENGTH EFFECTIVE AREA https://infocom.spbstu.ru/article/2016.51.3/ 3_29_42.pdf

RAR RUS 43-52 Shagniev Oleg shagnoleg@yandex.ru Peter the Great St.Petersburg Polytechnic University Burdakov Sergey control2@compmech.spbstu.ru Peter the Great St.Petersburg Polytechnic University Baydina Tatiana baydinatanya2401@gmail.com Control of Vibrational State of a Robot Interacting with a Rough Free-formed Surface The article considers the problem of position-force control of robot movement with a force feedback sensor in the mode of contact with a free-formed surface. The surface is assumed to be rough; the robot, according to the technological task, moves with a certain speed along the surface and maintains the predetermined level of contact force. In this case the surface roughness may cause the excitation oscillation of the robot close to resonance. The article shows in what case this effect is possible and how to control the vibration of the robot. We made a comparative analysis of the vibration state of the robot with a hard and active mount of the sensor to the robot arm. It is shown that the active mounting of the force sensor can significantly reduce the level of robot arm vibration. The article investigates the possibilities of further signal feedback using the accelerometer mounted on the robot arm, and the dynamic absorbing effect with active mounting of the force sensor. 10.5862/JCSTCS.252.4 681.51 robot force sensing hard and active mount of force sensor positionforce control free-formed rough surface contact interaction level of robot arm vibration acceleration feedback https://infocom.spbstu.ru/article/2016.51.4/ 4_43_52.pdf

RAR RUS 53-68 Yanchus Victor victorimop@mail.ru Borevich Ekaterina plasma5210@mail.ru A Study of the Effect of Color Palette in the Process of Film Frame Harmonization We studied the impact that a color palette chosen for a film frame has on the scanning and recognition process of the human eye. We used three color palettes: mono-color, complimentary colors, and three-color. The experiment, including the preparation of picture frames, and collection of data is described in detail. A binary model of the human color vision was used for theoretical confirmation of the experimental data. We have shown that the choice of the color palette has an impact on the scanning process of a film frame by the human eye. Therefore, the color palette can be used during film frame formatting to enhance and enrich the cinematic experience. ANOVA statistical analysis of the data allows to formulate several rules for film frame harmonization at every step of the frame production (from frame design to frame post production). We show that a three-color palette is the most readable but also the most complex to realize. 10.5862/JCSTCS.252.5 004.925.5 cinema film frame harmonization human color vision choice of color palette eye-tracker experiment https://infocom.spbstu.ru/article/2016.51.5/ 5_53_68.pdf

RAR RUS 70-79 Serikova Elena wdv08@inbox.ru Serikov Sergey srkv@inbox.ru Neural Network Approximation of Internal-Combustion Engine Characteristics The most preferable approach to develop mathematical models of complex technical objects is based on experimental data approximation. It is reasonable to use data mining systems, in particular, fuzzy inference systems and artificial neural networks (ANN) as an approximation tool. The article presents the results of applying a feedforward ANN to developing a mathematical model of an internal combustion engine. The mathematical model is developed through approximating the following basic data: internal combustion engine speed characteristics, efficiency and exhaust toxicity indicators. During computing experiments, the approximation error of the engine characteristics versus the model structure and parameters has been investigated. The developed model allows to solve further problems connected with analysis and optimization of the engine’s working processes for specified traction and highspeed modes of vehicles. 10.5862/JCSTCS.252.6 621.436-55 ARTIFICIAL NEURAL NETWORK INTERNAL COMBUSTION ENGINE IDENTIFICATION FUEL EFFICIENCY ENGINE EMISSIONS https://infocom.spbstu.ru/article/2016.51.6/ 6_70_79.pdf