ISSN 0021-3454 (print version)
ISSN 2500-0381 (online version)
Menu
Summaries of the issue

INFORMATION TECHNOLOGIES AND SYSTEMS

TECHNOLOGIES OF COGNITIVE VISUALIZATION OF TEMPORAL COMPLEX NETWORKS Mukhina Ksenia D. , Bochenina Klavdiya O., Karsakov Andrey S, Boukhanovsky Alexander V
195
Methods of temporal network visualization are considered. The basic methodological and algorithmic features of dynamic processes and temporal networks are reviewed. Several examples of programming realization are presented and application of the described technologies is discussed. 
NONLINEAR ALGORITHM FOR COMPENSATION OF BOUNDED DISTURBANCES Chugina Julia V., Furtat Igor Borisivich
204
The problem of control over a dynamic object under the influence of bounded disturbances is considered. An automatic control algorithm is developed; the algorithm is reported to provide a stable systems performance and desired level of output variables under the assumption that complete measurement of the state vectors is not available. The work is based on the known auxiliary loop method for compensation of the disturbances in linear systems or systems with Lipschitz nonlinearities. The special feature of the developed algorithm consists in introduction of an additional loop into the control system to allow evaluating the effect of unmeasured disturbances and parametric uncertainties in the functioning of the object under control. The robust method of auxiliary loop is proposed to augment with an adaptive control law of variable structure, which allows to provide a high accuracy of the system in the steady state compared to the original algorithm. Results of computer simulations illustrating the performance of the proposed control scheme are presented.
211
A method is considered for evaluating signals represented in piecewise polynomial form to fit within restrictions on signal level and its derivative. Analytical expression for matrix elements describing piecewise polynomial form of the signal are obtained. With the help of presented examples, quantified the gain in precision of estimating the signal due to the restrictions is quantified.

DEVICES AND SYSTEMS OF AUTOMATIC CONTROL

221
A model of noise-immune signal construction is developed to improve the efficiency of data transmission by radio control and measuring complexes. The proposed construction is based on a hexagonal structure and 4-way quadrature modulation. The use of amplitude and phase balanced modulation is shown to increase the spectral efficiency of the signal construction. A device is implemented for the developed model realization.
229
The main features of the avionics systems with federated and integrated modular architecture are considered. The causes, which can lead to increased hardware costs when running functional programs in real-time in complexes with integrated modular architecture are analyzed by the example of a location system.

COMPUTING TECHNIQUE

HORIZONTAL SCALING OF THE DATABASE USING CONSISTENT HASHING Zernov Alexey S., Ozhiganov Aleхander A.
234
The problem of the organization of distributed storage of large amounts of data in large-scale cluster systems is considered. A method of data distribution across cluster nodes using consistent hashing is presented. The basic method of consistent hashing, as well an improved method using virtual nodes are described.
239
The problem of improvement of efficiency of control over flexible manufacturing lines is considered. The developed approach is based on application of the decomposition method and apparatus of generalized matrix numbers in the problems of optimal distribution of resources in network structures. A method is proposed which allows to reduce the computational time and to provide efficient integration of structure and characteristics of the analyzed graph.

FINE MECHANICS DEVICES

INERTIAL ENGINE Vetrenko Vladimir I., Romanova Tatyana I.
245
Inertial engine used in short-term action devices to bring structural elements into rotational motion is considered. Torque is generated by a flat spring, and the flywheel of the engine provide the necessary momentum. Analytical expressions for calculating the size of the engine with the account for moments of inertia of its elements are presented. The formulas are derived based on the equality of angular momentum and the starting torque of the motor. The obtained expressions are used to design and manufacture a reusable experimental model of the engine; results of the model test demonstrate compliance of design characteristics with the experimental data. Absence of additional power sources reduces the cost of the developed engine and increases its reliability. The design of the engine can be used in devices used for optical image stabilization, for angular movement of astronaut seat control in the space in case of emergency, and for changing the position of rudder control of moving objects.
METHOD OF IDENTIFYING PARAMETERS OF SELF-OSCILLATION ACCELEROMETER Sergey V. Luchko, Mikhail A. Vatutin, Sergey Yu. Baluev, Klychnikov Alexey I., Petukhov Andrey B., Buyankin Mikhail P.
251
A technique is considered for identification of parameters of linear part of accelerometer with sensing element operating in self-oscillation mode. The identification is carried out by setting the known values of the parameters of the nonlinear element; the parameters of the linear part of the accelerometer is then determined by measuring the frequency of oscillations for given values of the parameters of the nonlinear unit.

OPTICAL AND OPTO-ELECTRONIC INSTRUMENTS AND SYSTEMS

256
A method of optimal choice of materials for passive optical thermostabilizing is presented. A graphic method is proposed for design of two-component achromatic thermostabilized lens with one of the components being synthesized from two sub-components to create the missing dispersion and the temperature characteristics of the materials to correct chromatic aberration of the lens position and thermos-responsive image defocusing.
DUAL-BEAM PNEUMO-OPTICAL METHOD FOR NONCONTACT MEASUREMENT OF INTRAOCULAR PRESSURE Trofimov Vladimir A., Nagibin Yuri T., Siunov Alexander D.
263
A dual-beam pneumo-optical method for noncontact measuring of intraocular pressure is developed. The method employs pneumatic impact on the cornea of the eye and is based on presented physical and mathematical model of the effect used to determine the required parameter. 

HEAT REGIMES AND RELIABILITY OF INSTRUMENTS AND SYSTEMS

THERMAL MODES OF SPACE OBJECTS WITH HIGH THERMAL INERTIA Pen’kov Maxim M., Dzitoev Azamat M., Lapovok Yevgeniy V., Hankov Sergei I.
267
A method of calculating the temperature of isothermal space object of spherical shape with high thermal inertia, moving in elliptical orbits in the plane of the terminator, is proposed. A criterion is formulated for a space object to be assigned to the class of objects with large thermal inertia. For these objects, the characteristic dimensions are introduced that define the total heat capacity and, accordingly, the constant thermal inertia. The possibility of substitution a real elliptic orbit in the mathematical model by equivalent circular orbit is demonstrated. The fact allows to replace the calculations of transient temperatures of heavy space objects with calculation of their steady-state temperatures almost without loss of accuracy. The approximation leads to solution of algebraic equations instead of the differential equation of the model. Thus, accurate enough values of the height of equivalent circular orbit are obtained depending on the height of the apogee of the initial elliptical orbit.
LINEAR MODEL FOR THERMAL CONDUCTIVITY OF DISPERSED MATERIALS BASED ON POLYMER BINDER Mikheev Vladislav A., Sulaberidze Vladimir Sh., Mushenko Vasily D.
275
A method of constructing a formula for effective thermal conductivity of composites based on polymer binder (silicone, polyurethane, epoxy) with powder thermally conductive dielectric fillers (quartz, corundum, aluminum nitride, silicon carbide and their paired combinations) is proposed. The method is based on generalization of experimental data, calculation and experimental determination of effective thermal conductivity of aggregates of fillers, and the search of a generalized empirical coefficient in the formula analogous to the Burger formula. Designed to meet previously identified patterns in studies of three-component mixtures and statistical modeling of their effective thermal conductivity, the formula is modified to ensure the conditions of the three limit transitions. For the empirical coefficient in the formula, a power-law dependence from relationship of the thermal conductivity of the filler to the thermal conductivity of the binder is proposed. The results of calculations of effective thermal conductivity with the proposed formula in 95% of cases differ for ±20 % from interpolation values.

INSTRUMENT-MAKING TECHNOLOGY

ELECTRONIC TECHNOLOGICAL PASSPORT OF THE PRODUCT Donetskaya Julia V. , Butsyk Alexander Ya., Sharygin Boris L.
280
The proposed approach to creation of electronic technological passports of a product is demonstrated by an example of the passport of the gyroscope manufactured in CSRI Elektropribor. Result of analysis of the raw data is presented and a model showing the relationship between the characteristics of the device and the manufacturing processes is developed. The goal of the electronic technological passports creation is formulated as collection, storage, and analysis of parameters of the device and of its components at all stages of manufacture, — the documentation of all activities and settings. Requirements to the environment for management and analysis of electronic technological passports are formulated, and the choice of Wonderware software as the primary system for the passports creation and implementation is justified.
287
A method for control of surface microgeometry of a fabricate component is presented. The method makes use of image of the surface profile as a graphic criterion for evaluating and monitoring the surface quality. Necessary conditions for comparison of profiles are given. An algorithm of comparison of two and more profiles is presented.