No. 4

Abstracts. No. 4, 2020 year
 
ABSTRACTS
Kondratenko V.S., Kadomkin V.V., Lu Hung-Tu, Naumov A.S., Velikovsky I.E. (e-mail: vsk1950@mail.ru)
Technology of laser immersion processing of materials

The paper provides new examples of the application of laser immersion processing of various materials using picoseconds laser radiation. The mechanism of the effect of pulsed radiation on the material in the contact zone with the cooling immersion liquid is considered, calculations of the proceeding thermal processes in the treatment zone are performed.

Keywords: laser immersion processing, picoseconds laser radiation, coolant, heat flux, heat accumulator, supercritical fluid.

Pautkin V.E., Utkin K.E. (e-mail: inercial@niifi.ru)
Technologies for making micromechanical sensors and thin films in their designs

The application of thin metallic and non-metallic films in manufacturing techniques of micromechanical sensors used to create elements of information-measuring and control systems Ц pressure sensors, accelerometers, angular velocity sensors, etc., as well as the design features of thin films is considered. The main purpose of thin films in the designs of micromechanical sensors is current-carrying layers, non-metallic Ц insulating layers of structural elements, such as strain gages. Metallic and nonmetallic films in the manufacturing technology are mainly used in the methods of obtaining and shaping sensitive elements of sensors.

Keywords: micromechanical sensors, thin films, protective layers, silicon dioxide films, silicon nitride films, polycrystalline silicon, strain gauges.

Teleshevsky V.I., Bushuev S.V., Grishin S.G. (e-mail: vitel@stankin.ru)
Method of phase shiftТs electronic control in laser interference measurement systems

Presents a method for electronic control of the phase shift in laser interference measurement systems with using the properties of acousto-optic interaction: a light beam defraction on an ultrasonic wave. The parameters of the optical circuit and the electronic control circuit was described. Were suggested operating modes of the acousto-optic modulator for obtaining a controlled phase shift.

Keywords: phase shift, laser interference measurement systems, acousto-optic interaction, optical circuit, electronic control circuit, acousto-optic modulator.

Guseva A.I., Malykhina G.F. (e-mail: alyona-kitty@rambler.ru)
Using computer modelling of fire for building intellectual fire-fighting system in ships

To build an intelligent fire protection system on ships, it is necessary to use sensors instead of detectors with a threshold principle. Sensors should measure such dangerous fire factors as: temperature, concentration of smoke and carbon monoxide in the room. The work presents a developed field model of fire supplemented by a model that simulates the dynamic characteristics of sensors, namely their inertia. The work presents a developed field model of fire supplemented by a model that simulates the dynamic characteristics of sensors. The performed computer model was verified based on the results of field tests. Algorithms have been developed to create a wireless fire detection system that detects a fire at an early stage. The developed system also allows you to determine the location of the ignition source, as well as its type, depending on the type of ignition source. The influence of a random measurement error on the result of the applied neural network is estimated.

Keywords: computer simulation of fire, dynamic characteristics of sensors, neural networks, fire-fighting ship systems, random error.

Egorov O.D. (e-mail: egorovod@yandex.ru)
Investigation of structural peculiarities of mechanisms

We offer the method of examination of structure of mechanisms taking into account the peculiarities explored. We also describe the formulas which allow us to find the structural and constructive redundancy in the closed loops of the mechanisms as well as the recommendations for their removal.

Keywords: mechanism, structural analysis, redundant connection, redundant mobility, metric connection, mobility, axis.

Norkulova K.T., Matyakubova P.M., Mamatkulov M.M., Boboev G.G. (e-mail: narkulova@mail.ru)
Interlayer flows and distribution of heated gas inside the drying chamber

The article discusses interlayer flows and the distribution of heated gas inside the drying chamber. Mutual coordination of the elements responsible for the distribution of heated gas in the interlayer space is shown in order to ensure effective and sustained drying. As a result, a new method was created for determining the interlayer flows and the distribution of heated gas inside the drying chamber, i.e. it was found that in the first large period the flow occurs in even spatial layers, and in the second large period through the odd layers, which ensures uniform heating.

Keywords: drying chambers, heat transfer, heated gas, product quality.

Belyaev P.S., Balabanov P.V., Divin A.G., Ponomarev S.V., Mozgova G.V. (e-mail: belyaev.ps@yandex.ru)
Automated system for measuring of liquid polymer materials thermal conductivity under shear flow

The analysis of methods and devices for determining thermal conductivity of polymers in liquid phase during shear flow was carried out. To measure thermal conductivity in the range of 0,1...1 W/(m·K) the relevance of creating a device that provides a shear flow of material under study in the gap between the coaxial cylinders and a constant temperature difference in the thickness of its layer is justified. The design of the measuring device was developed, as well as control systems for measuring thermal conductivity of polymers in liquid phase at temperatures up to 200 ∞C and shear rates up to 150sЦ1 were created.

Keywords: thermophysical properties, thermal conductivity, liquid materials, shear flow, thermal conductivity anisotropy, automated system for scientific research.

Komissarov A.V., Karazeev S.V., Valitov R.R., Shishkin V.V. (e-mail: karazeevs@bk.ru)
Methodology for conducting multi-factor equivalent-cyclic tests to assess the reliability of avionics at the stage of research and development work

This article shows the method of multi-factor equivalent-cyclic testing (MIFEC) for evaluating the reliability of avionics at the stage of research and development (R & d) in the form of a sequence of its implementation. The main principles of construction and aspects of the methodology are considered: normative and technical base, methods and means of control. Special attention is paid to the principles of construction of MPAZI and mechanisms of failures of avionics. The scope of the method and its main advantages are shown. It is assumed that a database is formed as the results of testing for the reliability of avionics. It is noted that all the methods and procedures used for testing are effective research tools and provide a preliminary assessment of the reliability of the developed avionics, for example, in terms of degradation of soldered connections of the electronic component base of foreign production in BGA-cases, made using lead-Free technology (Pb-Free) and installed with reballing operations. In addition, this MFECI methodology addresses the issue of confirming the self-modality of tests in terms of intensification of degradation processes through the use of forced influencing factors of HALT rejection procedures.

Keywords: multi-factor equivalent-cyclic avionics tests for reliability, avionics reliability, accelerated reliability tests, HALT.

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