In article a modelling and experimental survey of the controlled attenuator in a frequency range 2 - 4 GHz is performed. It is received the minimum attenuation no more than 3.5 dB, the maximum attenuation not less than 56 dB at a current 3.8 mA. The amplitude-frequency characteristic unevenness at a current 3.8 mA does not exceed 3 dB. The attenuator design is made in the form of the hybrid module. The attenuator is intended for adjustment of transfer constant of the microwave receiver.

Keywords: attenuator, pin-diode, amplitude-frequency characteristic, control current

The estimation of the dependence of anode potential of the temperature and current density. It is established that the activation energy of the anodic oxidation process HORTA, HORTA-I1 and OITA decreases with increasing potential, which corresponds to the limiting stage of charge transfer. The activation energy of the anodic process refers to the collective processes of transformation of the catalytic coating and anodic oxidation of the chloride ions. The latter process limits the adsorption of atomic chlorine, and the increase in activation energy is correlated with increased corrosion resistance. The dependence of the activation energy of from the content in the catalytic layer of iridium has an extreme character. The maximum is reached when the content of iridium 60-70%.

Keywords: ORTA, ORTA-I1, OITA, activation energy, anodic oxidation, adsorption of chlorine, sodium hypochlorite, chlorine, charge transfer, a mixed oxide, electrode potential

In this work, the impact of the impact of the loads on the work of the optical system of landing the aircraft on the deck of the ship is studied. The influence of a shock pulse from the landing gear of an airplane during interaction with the deck is considered. Also the deviation of the light beams of the optical landing system and the making of constructive solutions for ensuring the required values ​​of the beam deflection are estimated.

Keywords: impact pulse, optical landing system, automation of optical systems design, reduction of light rays deflection

The frequency divider for 32, operating in a range of frequencies 8-18 GHz is considered. The specifics of the schematic diagram is shown. The design and element base is described in short. The model is made and its experimental research is carried out. The technique and the block diagram of the experiment is described. Level of harmonics of an output signal is measured. For decrease of level of harmonics of the useful signal the low-pass filter of type SALF-580 is used. Presence of a parasitic output signal in the absence of an input signal is revelead.

Keywords: frequency divider, microcircuit, experiment, amplitude-frequency characteristic, low-pass filter

The authors solve the problem of effective use of energy sources of wind-diesel hybrid power stations for autonomous electric consumers. A new device connecting energy sources has been developed. Universal voltage converter (UVC) allows to connect both of AC and DC sources with a wide range of rated output voltages. UVC can be used as a part of smart grid or SCADA system. The UVC control system automatically determines the type of the connected power source and issues switching commands for consumer circuits. A 30 kVA UVC prototype was created. The article gives a UVC brief description and presents the results of the prototype research.

Keywords: renewable energy sources, wind-diesel hybrid power station, autonomous power supply system, efficiency increase, industrial control system, hybrid inverter, modified inverter, capacitive storage, universal converter, integration device

the article is devoted to normalization of wind load according to the datas of meteorological stations the example of the city of Volgograd during the period from 2003 to 2012. Obtained the main statistical characteristics, the coefficient of reliability for wind load, wind roses are built.

Keywords: probabilistic design, reliability, wind load

For a research of features of formation of temperature and high-speed fields in volume of the electrosteel-smelting shop at various ways of distribution of stitched air the three-dimensional non-stationary model is used. By results of the made numerical experiment for the description of spatial distribution of air and thermal streams in the shop it is established that the most rational way of supply of stitched air in the considered shops is the way of "flooding of a working zone".

Keywords: microclimate, all-exchange ventilation, air distributor, convective streams, stitched streams, electrosteel-smelting furnaces, speed, temperature

In article traffic safety of vehicles at the movement on crossings is considered. Possibility of a road accident is estimated. In article the initial speed, size of a stopping way of the second vehicle, taking into account overall dimensions of vehicles are determined.

Keywords: street road network, crossing, road accident, traffic safety, initial speed, stopping way

The influence of mechanical activation conditions on the the sintering temperature, grain size and microstructure of PZT-19 ceramics was established. It was found that the mechanical activation method allows to increase the uniformity of ceramics grains.

Keywords: ferroelectrics, particle size distribution, green building, mechanical activation, PZT

Within the framework of solving the problem of increasing the effectiveness of the directional properties of adaptive systems with parametric sonar emitting antenna in the results of generalization of theoretical and experimental studies of the effect of hydro-irregularities on the characteristic parameter of the antenna. A comparison of the results of calculations of the antenna directivity characteristic parameter derived from the model Khokhlova-Zabolotskaya-Kuznetsova, with the results of experimental measurements of the directional properties of the parametric array. We obtain the normalized dependence of the width of the parametric characteristics of the antenna by lowering the difference frequency from the center frequency of the pump waves of 5 to 16 times. The influence of changes in the speed of sound in the direction of the parametric array. We obtain the normalized dependence of the width of the antenna characteristics of the parametric values of the sound velocity at the surface of the pump transducer. It was found that the greatest impact on the characteristic parameter of the antenna has a change in the speed of sound to a distance equal to the lengths of 1-2 zone diffraction of the pump waves.

Keywords: adaptive sonar system, efficiency, parametric antenna, directivity characteristic

This article presents the results of tests of samples on the basis of equiatomic alloy with shape memory effect. The obtained system of dimensionless quantities that adequately describe the elastic-plastic deformation. It is established that the assessment of scale effects in modeling shockproof device-based alloy with shape memory effect leads to the technical ability of extrapolation of experimental results to other objects to generate the initial data of the mathematical model under the condition of similarity of characteristics of external loads.

Keywords: shock proof device, elastic-plastic deformation, shape memory effect, protection of the joints, scale factor

Investigated the influence of contents of sodium - carboxymethylcellulose, glycerin and powder Fe on electrical properties of composite coatings. Proposed regression model describing the relationship of the values of the electrical resistivity of the coating and dielectric strength to their composition used to predict the electrical properties of the formed coatings. Showed the correlation between the microstructure of coatings with Fe powder and electrical properties.

Keywords: sodium-carboxymethylcellulose, the iron powder, dielectric strength, resistivity, composite material

The simulation of the pulsating component of the wind load on the reinforced concrete skeleton of the building by the finite element method is considered in the article. The calculation of the pulsation component of the wind load was carried out according to the procedure specified in SP20.13330.2011 "Loads and Impacts" and calculation of the pulsating component of the wind load in accordance with the recommendations of CNIISK them. Kucherenko. Based on the results of the calculations, the analysis of the results obtained and conclusions are made.

Keywords: finite element method, design scheme, vibration modes, pulsating component of wind load, building frame

The experimental research of amplitude characteristics of low-noise amplifiers of microwave range of АС180400-071 type of Joint-Stock Company "SKARD-ELEKTRONIKS" manufacture was made. It is shown, that power of saturation can vary from 34 to 75 mW at input power 10 mW. On a number of frequencies monotony of the amplitude characteristic is not provided.

Keywords: limiting amplifier, power of saturation, measurement installation, amplitude characteristic

In article traffic safety of vehicles at the movement at intersections is considered. Possibility of a road accident is estimated. In article the interval of time at which TC2 becomes an obstacle for TC1 is defined and there can be a collision of the vehicles moving at an obtuse angle. Parameters of the movement of vehicles necessary for development of mathematical model are also determined.

Keywords: street road network, intersection, road accident, traffic safety