Electrotechnical devices starting processes short analysis is done including limited power autonomous system. The electrical installation starting processes with thermistor rheostats character depend on considered and formulated number of restrictions. The graphic depending’s are given characterizing different start models. The recommendations are given to form optimal starting processes with rheostats built on semiconductors polycrystalline thermistors.

Keywords: semiconductor thermoresistance, electrical installation, starting current, starting model, starting rheostat, starting processes dynamics

Dynamic memory devices are designed to generate a sequence of copies of a pulsed radio signal with a specified delay time. Such controllable devices can be considered as delay lines with a variable delay time and can be used in various signal processing systems. The results of statistical modeling of the influence of the parameters of couplers on the identity of the formed copies in a dynamic memory device with a binary fiber-optic structure are presented. The possibility of increasing the copy identity is proved by sorting the existing couplers when installing them into a binary fiber-optic structure. With a cascade number of more than 7, an increase in the identity of the copies is possible even when compared with the use of ideal couplers.

Keywords: dynamic memory device, binary structure, copy identity, coupler, tap coefficient

In this paper, we study the frequency dependence of the inductor with a ferromagnetic core in the sound frequency range. Based on the measurements made, a replacement circuit for the coil is constructed, taking into account the active losses due to magnetic hysteresis, as well as the capacitive component of the current appearing at higher frequencies. The method of determining the parameters of the substitution scheme is given in the article, which, due to the complexity of the mathematical model, was determined by statistical averaging of the solutions of systems of nonlinear equations. Conclusions are made about the practical application of this substitution scheme in electronic devices.

Keywords: substitution scheme induction coil, frequency dependence of the impedance of the induction coil, active losses in the core

The serial peripheral interface (SPI) based on current logic, in which due to current mirrors stable to voltage supply and operation of transistors in the active mode, increased reliability and resistance to destabilizing factors are considered. The circuit design of D-flip-flops and the results of simulation on a 0.25 μm CMOS process are given. In the developed device, current consumption adjustment is realized with an external resistor, and external load resistors allow to select the necessary amplitude of the output signal.

Keywords: current logic, SPI, serial peripheral interface, linear algebra

In the article possibilities and elements for PHIL simulation of multifunctional modular systems (MFMS) are considered. For this purpose, mathematical studies of such systems were carried out, the tasks of their basic elements were singled out, and the main task was to create a universal modular model. The structure of the energy MFMS and its problems from the position of graph theory are determined. The analysis of the existing methods of PHIL simulation is presented, as well as the structure of the simulated fragment of the system at the junction of the two modules is defined with using the "coupling" method of the scheme. As a result, conclusions were drawn about the possibility of applying a PHIL simulation to the MFMS.

Keywords: PHIL simulation, modular systems, macro task, power hardware-in-the-loop simulation, analog-digital system, numerical part, analog part, Gauss-Seidel method, Jacobi method

Correlation intervals of chaotic systems with modulated time step-size signals was estimated. Temporal discretisation step estimation ratio to quasi-resonant period oscillations was varied. Probability distributions of the Lorenz system signals are considered. Discretization step size influence on poly Gauss properties of signals was carried out.

Keywords: dynamic chaos, radioelectronic dynamic systems, statistical properties

The improvement of methods of electronic devices simulation is currently ongoing, so development the tests for these methods is the actual task at the present time. The goal of this paper is to develop the original test problem for efficiency assessment of numerical methods of ordinary differential equations solving and methods of numerical analysis of transients in electronic circuits and systems. The test problem is presented as mathematical model and electronic circuit too. Test problem and technique of estimation of numerical analysis algorithms’ accuracy proposed in the present paper can be used in circuit simulators and in computer mathematics programs to test both known and new simulation methods for electronic circuits and systems with various dynamics, including stiff and/or nonlinear circuits.

Keywords: numerical methods, electronic circuits, transient analysis, ordinary differential equations, stiff systems

Discusses the use of complicated UWB signals in supergrades and subsurface radiolocation. The aim of this work is to analyze the possibility of complex UWB signals using a simpler aproximarse signals, which greatly simplifies the task of finding the basic parameters of the echo signal. As a model of the complex signal of the selected signal with linear frequency modulation. Designed the error of approximation of ultra-wideband LFM echo signal of the echo signal with a rectangular spectrum with different environment settings and the coefficients of the high bandwidth. Based on these data it is concluded that at high modulation indices it is possible to replace the analytical calculations of complex expressions for the spectrum of the chirp signal by a simple ratio aproximarse spectrum.

Keywords: Radar, signals, ultra-wideband, the spectrum of the signal, approximating, filtration, agreed

Article is devoted to solving the problem of video compression for panoramic video surveillance system. The actuality of the problem associated with both the limitations of existing solutions, as well as the peculiarities of video streams, which in many codecs are not counted. The novelty of the work is related to the fact that the role of the key frame is performed by image of background estimation (not by a frame from input video stream). In this paper we used the ideas of the four mainstream approaches in the field of compression (segmentation (division into a dynamic component and a static background), JPEG-compression, reduce the frequency of transmission of the reference frame (image of background estimation), the ability to change the resolution of the frame, the synthesis of the output image). The solution of problem of compression is produced by division of video frames into separate semantically meaningful elements (objects, background) transmitted over a communication channel with varying degrees of detail depending on the semantic significance and accompanied by metadata. It is experimentally proved that the value of the compression ratio of the video stream K = 135 times at peak signal to noise ratio PSNR = 32 dB, which allows to send the panorama of resolution 3072x720, stitched from the three cameras, through the channel with a capacity of 10-11 Mbit / s.

Keywords: video compression, segmentation, image processing, video surveillance, metadata

The technique of space-time processing of acoustic signals with the use a convolution algorithm the purpose of application of which is the spatial positioning of the virtual soun sourse (auralization) is com=nsidered in this article. Also the reverberation chatacteristics of a modeled acoustic environment are take into consideration.

Keywords: auralization, HRTF, artificial reverb, room simulation, convolution algorithm, impulse response convolution, impulse response synthesis, dynamic convolution, complex filtering

A hybrid reverberation algorithm is offered in this article. This algorithm is using both a convolution section in which a convolution with an inmpulse response of a real acoustic room is being implied and a mathematical reverb model. Also an algorithm for generating impulse responses of optional rooms is also offered in the following article. The algorithm efficiency calculation is  specified in the article. Thia reverberation algorithm is a part of a bigger complez auralization algorithm where it is being used coherently with an HRTF-based algorithm in order to simulate a real acoustic environment  

Keywords: artificial reverb, room simulation, convolution algorithm, impulse response convolution, impulse response synthesis, dynamic convolution, complex filtering

This paper presents method of calculation of angular power spectra and signal to noise plus interferences ratio in presence of active antenna element mutual coupling.

Keywords: Active antenna array, Rx-Tx antenna module, spatial structure, mutual coupling, nonlinear distortion

The method of estimating of generator frequencies for radio-electronic devices based on coupling treatment of formed signal phases is considered. The correlations setting the correspondence of potentially achieved accuracy of frequency estimations for each generator to their number and parameter values are presented.

Keywords: generator, frequency estimation, function of maximum likelihood estimation, estimation of dispersion

The work is focuses on the determination of the attenuation factor of electromagnetic radiation when applied in soils with different physical properties as a criterion for assessing the depth of Ground-penetrating radar (GPR) method. The measurements were performed using a tunable coaxial resonator which frequency range coincides with one normally used in the practice of GPR. The attenuation factor of a sample of soil placed in a cavity is determined by the shift and width of the resonance line. Advantage of this method is the preservation of soil structure during the measurement.

Keywords: ground-penetrating radar, properties of soils, attenuation factor.