Vestnik of Samara State Technical University. Technical Sciences Series
Journal Vestnik of Samara State Technical University. Technical Sciences Series has been published at Samara State Technical University since 1993 and now it is an academic periodical aimed at scientific research development, support of leading scientific schools and staff training.
The journal publishes original experimental and theoretical articles of leading national and foreign scientists on the most topical problems of system analysis, automation and control of technological processes, IT, Electrical Engineering, Instrumentation and Metrology, Energetics, Metallurgy and Material Science.
The journal's mission is to promote the development of technical sciences and technologies through the publication of high-quality scientific research and articles. We strive to create a platform for the exchange of knowledge and experience that unites scientists and engineers, fostering innovation and progress. The journal supports open access to publications to ensure maximum availability of knowledge for all interested parties.
The journal is aimed at a wide audience, including:
- Scientists and researchers: specialists working in the field of technical sciences.
- Students and graduate students: young scholars seeking relevant information for their academic and research projects.
- Engineers: professionals working in various industries who want to stay informed about the latest advancements and technologies in their field.
- Educators: those interested in using contemporary research to enhance curricula and educational processes.
Research headings:
- Information Technology and Communications
- Electronics, Photonics, Instrumentation and Communications
- Energy and Electrical Engineering
The Journal is published with the publisher's funds. All publications in the journal are free of charge. All electronic publications are distributed for free.
The Journal’s issues appear 4 times annually.
The Journal is included in the List of Peer-reviewed Journals of Higher Attestation Commission, and the research results of a DSc or CSc thesis are recommended to be published in the journal.
The Journal is included in the Russian Index of Science Citation (RISC) database.
The Journal is registered with Roskomnadzor as a mass media source.
The Journal is edited in both print (ISSN: 1991-8542) and online (e-ISSN: 2712-8938) forms.
The journal content is licensed under a Creative Commons Attribution 4.0 License
Full-text access to articles is available on site at http://elibrary.ru
Current Issue
Vol 33, No 2 (2025)
Information Technology and Communications
Evaluation of the efficiency of methane pyrolysis technology within a decision support system
Abstract
This paper presents the development of a concept and operating algorithm for a decision support system (DSS) designed for comprehensive analysis and identification of directions for improving the methane pyrolysis process. The authors propose a modular DSS architecture whose key element is a multifactor-analysis module based on the super-efficiency Data Envelopment Analysis (DEA) model. This module evaluates and ranks various technological operating modes of methane pyrolysis. Applying DEA models enables the identification of efficient operating modes and, crucially, the pinpointing of those with the greatest potential for practical deployment owing to their technological robustness.
The study analyzes the influence of technological parameters on methane-conversion degree and hydrogen productivity in the pyrolysis process, and demonstrates how the proposed approach can rank efficient modes and generate well-grounded recommendations for their further optimization. The developed DSS can serve as an effective tool for enhancing the technological and economic efficiency of methane pyrolysis, facilitating its industrial adoption and strengthening its competitiveness as an environmentally oriented hydrogen-production method. The results contribute to the advancement of methodologies for managing complex technological systems.
7-27
Experimental studies of modelling the development of agricultural crops in a digital twin of plant crops
Abstract
A method is proposed for calculating the output parameters of an agricultural crop in a digital twin of plant crops depending on weather conditions and resource constraints of the environment. The method is based on a model of "tubes" of input and output parameters of plant growth and development stages - ranges of values of the main environmental factors for each plant variety that are important for plant survival. These ranges are conventionally divided into three categories: optimal, in which the plant demonstrates the best development indicators; recommended, ensuring stable growth without significant stress; and critical, beyond which irreversible disturbances in the physiological processes of the plant are possible, including its death. The proposed calculation method based on the available data on weather conditions and available resources makes it possible to link the input and output parameters of the current stage and transfer the obtained results for calculating the next stage in order to build a final piecewise linear plan for plant growth and development and to forecast the yield and other plant parameters. The experiment provides an example of the proposed method for the agricultural crop "Winter wheat" under the actual scenario and alternative climate scenarios that model changes in weather conditions, and a comparison of the results of these scenarios with the values under actual conditions. The modeling results made it possible to estimate the sensitivity of the yield and plant height of winter wheat to various weather deviations. An assessment is made of the discrepancies identified for various scenarios, the results obtained are discussed, conclusions are formulated regarding the applicability of the proposed method for practical use in agricultural modeling, and directions for further research and development are presented.
28-47
Electronics, Photonics, Instrumentation and Communications
Automatic compensation of thermodeformation interferences in information and measurement systems of spacecraft
Abstract
The efficiency of the operation of information-measuring systems of spacecraft, and primarily optical systems, depends on the thermal deformations of the supporting structure on which they are placed. Small angular thermo-deformation displacements of the optical axes, caused by the non-uniformity of the temperature field of the supporting structure, lead to significant linear deviations of the measurement points due to the distance of the measurement objects from the spacecraft’s orbit. The article discusses the dynamic characteristics of the automatic temperature field stabilization systems of the supporting structure of a small spacecraft under the influence of external and internal disturbances typical for objects of this type.
48-62
Mathematical model of thermal drift of fiber optic gyroscope taking into account quadrupole spooling of fiber
Abstract
The paper considers the development of a mathematical model of the thermal drift of a fiber-optic gyroscope (FOG) due to the thermo-optic effect, which takes into account the features of quadrupole spooling of fiber on the coil. These devices are widely used in stabilization, orientation and motion control systems of aerospace and ground techniques. The main task in achieving this goal was to separate the non-stationary temperature function into a temporal component and a spatial one – the function characterizing the temperature distribution along the fiber filament for the quadrupole spooling of fiber at radial temperature gradient. When developing the model, the initial allowing is to consider the array of fiber filaments on the spool as a periodic continuous structure - successive layers with the same thermophysical characteristics. This allows taking into account only radial temperature gradients and assuming that the temperature at each moment of time in the corresponding fiber layer on the spool is uniformly distributed. The study provides justification of the correctness of the proposed approach in constructing the thermal drift model by simulating the temperature in each layer of the fiber coil using the method of elementary balances. Modeling was performed in specially developed software, in which the functions of graphical output of calculation results are implemented. Based on computational experiments, it is substantiated that in real conditions of FOG operation at a relatively low rate of change in ambient temperature, the law of temperature change in the fiber coil in the radial direction can be assumed as linear. The function of the spatial distribution of the temperature field along the fiber filament is determined. Using this function, an algorithm of its application for plotting the temperature distribution in a fiber coil with given geometric parameters close to the real one is implemented. An example of calculating the thermal drift of the device for specified parameters of the fiber and geometric parameters of the coil, closed to the parameters of devices used in practice, is given. The proposed model for calculating the thermal drift of a fiber-optic gyroscope extends and complements the capabilities of the method of elementary balances, which makes it possible to implement a simple and effective algorithm for calculating non-stationary temperature fields and thermal drift of almost any fiber-optic gyroscope of typical design. The developed model will allow developers of automatic object motion control systems to realize effective algorithms for calibration and correction of thermal drift of a fiber optic gyroscope.
63-78
Using dual-channel data processing for separation of overlapped chromatographic signals
Abstract
This article addresses the problem of separating overlapped chromatographic signals using a dual-detector chromatograph. Traditional chromatographic signal processing technology typically employs a single-detector chromatograph. The proposed approach utilizes multi-channel data processing, where the separation process in the column is recorded by multiple detectors. In the case of a dual-detector chromatographic information-measuring system (IMS), two non-selective detectors with different sensitivities to the sample components are used. This enables a fundamentally new approach to separating overlapped signals.
The separation is based on special mathematical transformations of the overlapped signals from the two chromatographic detectors. The ratio of the first detector's signal to the second detector's signal (and vice versa) is calculated, yielding certain coefficients as functions of time. Using these coefficients, relationships are derived to reconstruct the unresolved components of the signals from the first and second detectors, respectively. The proposed separation method can be applied to both symmetric and asymmetric peaks. Examples of peak reconstruction for various resolution values are presented.
To obtain smoothed values of the reconstructed peaks during signal separation in noisy conditions, a standard MATLAB procedure of cyclic averaging over a short interval is employed. To preserve the width of the reconstructed peaks in the separation algorithm under noisy conditions, it is proposed to approximate the ratio of the detector signals using a hyperbolic tangent function. Examples demonstrating the effectiveness of smoothing are provided.
79-93
Energy and Electrical Engineering
Improving the efficiency of a regasification circuit operating on a two-stage Brayton cycle for cryogenic energy storage systems
Abstract
Currently, the issue of compensating for uneven loads on power grids is one of the key directions in the development of the energy sector. One solution to this problem is the use of cryogenic energy storage systems, which allow energy to be stored in the form of liquefied gas. The main drawback of such systems is their relatively low storage coefficient, and this paper proposes to improve it by using a two-stage Brayton cycle in the regasification circuit. As a result of technical and economic analysis, a Pareto-efficient frontier of circuit configurations was obtained, working fluids for the upper and lower stages were determined, and the profitability of the installations was established.
94-108
Algorithms optimization for combined natural gas cooling units control of electric drives taking into account the discreteness of control effect
Abstract
The problems of main gas pipelines compressor stations electromagnetic compatibility electrical complex of elements, arising when using a frequency-controlled drive of air-cooling devices fans for natural gas, are noted. The feasibility of using combined control systems is substantiated, in which air cooling devices included in the gas cooling unit are divided into two groups: with frequency and discrete regulation of fan speed. The control algorithms optimization issue for electric drives of a combined system by the criterion of power on the fan shaft is discussed. An algorithm for fan speed optimal interconnected control and the number of switched-on fan motors of the air-cooling devices corresponding groups is developed, taking into account the discreteness of the control action. An assessment is given of the power savings on the fan shaft when replacing discrete control with a combined one using the developed control algorithm. It is proposed to use an automatic control system closed by the gas temperature at the outlet of the cooling unit for implementing the optimal algorithm. A comparative the cooling process analysis the energy indicators and the accuracy of temperature maintenance was carried out using the developed optimal control algorithm and an algorithm that does not take into account the discreteness of the control action. It was shown that the use of the latter with a relatively small number of air cooling devices can lead to an unacceptable error in stabilizing the temperature at the outlet of the cooling unit. The control algorithms possibility of using simplified versions is considered. The advantages of using a combined control system, providing a significant energy-saving effect, are shown using the example of a cooling unit containing four two-fan air-cooling devices and operating under conditions of a significantly uneven load.
109-124