Category: Raw News

Translation. Region: Russian Federal

Source: Peter the Great St. Petersburg Polytechnic University –

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From July 4 to 6, the Polytechnic University hosted the international scientific conference "Implementation of Innovations. New Materials and Additive Technologies" (VINMiAT-25). Scientists and experts in the field of materials science discussed the latest achievements in the creation of new materials and equipment design.

The organizers were the Ministry of Science and Higher Education of the Russian Federation, the Russian Academy of Sciences, the National Academy of Sciences of Belarus, PJSC Gazprom and SPbPU.

The conference considered modern achievements of science and technology in the field of physical and chemical processes for obtaining new materials and designing technological equipment, problems of implementation and commercialization of innovative technologies of the country's fuel and energy complex, as well as new approaches to solving urgent problems in modern materials science.

The plenary session was held in the research building of Technopolis Polytech. It was opened by the rector of SPbPU, academician of the Russian Academy of Sciences Andrey Rudskoy.

I am pleased to welcome you to the international scientific conference “Implementation of Innovations. New Materials and Additive Technologies”. This significant event brought together leading representatives of the scientific community, experts in the field of materials science, as well as students and postgraduates. I am confident that the results of our joint work will find practical application in various industries, contributing to the technological development of our country,” noted Andrey Rudskoy.

The Deputy Head of Department of PJSC Gazprom, Maxim Nedzvetsky, gave a welcoming speech, expressing gratitude to the Polytechnic University for the excellent organization and emphasizing the relevance of the issues discussed.

At the plenary session, Director of the Institute of Mechanical Engineering, Materials and Transport of SPbPU Anatoly Popovich made a report on the experience and prospects for the development of additive and laser technologies. As the chief designer of the Scientific and Technical Complex "New Materials, Technologies, Production" within the framework of the project "Strategic Technological Leadership", Anatoly Popovich paid special attention to the manufacture, repair and restoration of components of power engineering in various ways. He also assessed the prospects for the development of the additive technology industry.

Head of the Department of PJSC Gazprom Viktor Seredenok spoke about the implementation of innovative projects in the company. Associate Professor of the Higher School of Physics and Technology of Materials of the Institute of Metallurgical Engineering and Technology Oleg Panchenko gave a report "New Technological Approaches in Welding". He presented a number of technologies that are being implemented at the Polytechnic University. These are electric arc welding with a consumable electrode with cold metal transfer and a non-consumable electrode with a focused arc, manual laser welding, friction stir welding of steels, as well as process automation technologies.

Head of the structural division of the Russian Quantum Center (International Center for Quantum Optics and Quantum Technologies) Anton Guglya devoted his speech to quantum and related technologies in the oil and gas sector. Deputy Chief Engineer for Additive Technologies at UEC Aviadvigatel Alexander Aksenov shared his experience of using additive technologies in the company.

Representatives from Russia, Uzbekistan, Belarus and China participated in the conference. Their work was organized into several sections:

nature-like materials and additive technologies for their production; welding and related technologies; technology for producing powder, composite materials and coatings; equipment, automation and robotics of innovative technologies; physical and chemical processes and innovative technologies in modern materials science; implementation of innovations in high-tech products at PJSC Gazprom.

Specialists from the research laboratory "LiAT" of IMMiT SPbPU presented three reports. The research group analyzed residual deformations of a welded joint using different welding methods. The report presented the results of the influence of the welding method on the level of residual deformations, energy input and the width of the heat-affected zone, as well as on technical and economic characteristics.

A separate presentation was devoted to the restoration of nozzle blades made of cobalt and nickel alloy using laser cladding. SPbPU scientists created a laser cladding technology and developed measures to prevent cracks. The cladding blades successfully passed operational tests.

Mikhail Kuznetsov, Head of the Research Laboratory "LiAT" of IMMiT, presented a series of robotic systems for the implementation of laser welding, laser cladding and direct laser deposition processes in industrial production conditions. Among the developments are the mobile laser cladding system "Nomad", direct laser deposition systems, as well as laser and hybrid laser-arc welding. Special attention was paid to the laser foil welding system and the system for applying a porous coating to hip joint cups. The participants' attention was drawn to examples of the systems' application for solving industrial partners' production problems.

Participation in VINMiAT-2025 is very important for understanding the development trend of industry and science in the field of additive technologies, as well as identifying points of contact for further interaction with industry, commented Mikhail Kuznetsov.

At the sections, experts considered various issues: research into the mechanical properties of continuously reinforced nature-like polymer composites, development of biocompatible titanium-tantalum composites using selective laser melting, 3D printing of metal products using melt extrusion technology, implementation of innovations at Gazprom Transgaz Saratov, the procedure for admitting MTRs for use at Gazprom facilities, modern solutions in instrument making using machine vision and FDM technology, and much more.

A cruise on a motor ship with an excursion program was organized for the conference participants. A meeting was held on board the motor ship, where reports were presented by representatives of PAO Gazprom and its subsidiaries, scientific and educational institutions and enterprises.

Please note: This information is raw content obtained directly from the source of the information. It is an accurate report of what the source claims and does not necessarily reflect the position of MIL-OSI or its clients.

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Translation. Region: Russian Federal

Source: Saint Petersburg State University –

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The proposed calculation method avoids the inaccuracies that were allowed by previously used approaches and offers engineers simple formulas that are convenient for use in real projects.

Phase-locked loop systems are widely used in satellite navigation and wireless communication devices. They provide precise synchronization of the frequency and phase of the signal coming to the device and the signal generated by the device itself. For example, in the case of a Wi-Fi connection between a router and a phone, the signals from the devices may differ slightly due to interference or instability of the transmitter (router). The phase-locked loop system compares the characteristics of the incoming signal and adjusts them to those characteristic of the device. This reduces the number of errors in the transmission of information, even if the original signal is “noisy”.

Research results, supported with a grant from the Russian Science Foundation (RSF), published in a scientific journal IEEE Access.

However, phase-locked loop systems operate stably only if a number of conditions are met. For example, there are limitations on the so-called hold range, the frequency difference at which synchronization can still be maintained. Another important parameter is the capture range, i.e. the frequency spectrum within which synchronization is guaranteed under any initial conditions. At the same time, it is difficult to accurately determine the capture range, since its calculation requires solving systems of nonlinear equations with a large number of variables. Previously, engineers used approximate methods that could lead to errors, and therefore did not always ensure stable operation of the system.

Researchers from St. Petersburg University analyzed operation of one of the most common phase-locked loop systems and found a simpler way to accurately calculate its capture range. To do this, scientists from St. Petersburg State University used a mathematical method of replacing variables, which allows equations used in other approaches to be reduced to a simpler form. In addition, the researchers used graphs to display how the state of the phase-locked loop system changes over time when transmitting and receiving signals with different parameters (frequencies and phases).

We have proposed a comprehensive approach that combines qualitative analysis of the system and the theory of hidden oscillations, the creation and development of which was this year. was noted State Prize of the Russian Federation in the field of science and technology.

Head of the Department of Applied Cybernetics at St. Petersburg State University, Head of the Laboratory of Information and Control Systems at the Institute of Mechanical Engineering of the Russian Academy of Sciences, Corresponding Member of the Russian Academy of Sciences, Professor Nikolay Kuznetsov

"This approach allowed us to obtain an accurate formula for the capture range and avoid a situation where the device unexpectedly loses synchronization, which can be critical in the case of systems used in navigation and energy. In the future, we plan to develop methods of the theory of hidden oscillations for the analysis of more complex phase-locked loop systems and collaborate with engineers to create prototypes of such systems based on the proposed methods of analysis and synthesis. The relevance of this work is associated with the import substitution program in Russian electronics and a wide range of engineering applications," explained Nikolai Kuznetsov, Head of the Department of Applied Cybernetics at St. Petersburg State University, Head of the Laboratory of Information and Control Systems at the Institute of Mechanics of the Russian Academy of Sciences, Corresponding Member of the Russian Academy of Sciences, Professor.

St Petersburg University mathematician receives State Prize in Science and Technology

The derived formulas made it possible to correct inaccuracies previously proposed approaches, in particular ignoring hidden oscillations that can lead to loss of synchronization. Computer modeling confirmed that the calculations accurately describe the real behavior of the automatic frequency control system, which makes them suitable for practical use.

Saint Petersburg State University is the oldest university in Russia. It was founded on January 28 (February 8), 1724, when Peter the Great issued a decree establishing the University and the Russian Academy of Sciences. Today, SPbU is one of the largest scientific and educational centers. More than 20 thousand students study here, more than 15 large laboratories and 23 resource centers have been created, which are part of the country's leading Science Park. Graduates of the University have repeatedly become Nobel and Fields Medal laureates.

Recently, the Northern capital has officially celebrated a new holiday: Saint Petersburg State University Day. contributed in the Law of St. Petersburg “On Holidays and Memorable Dates in St. Petersburg”.

In February 2025, a ceremony was held during which Roscosmos cosmonauts handed over To the University flag "300 years of St. Petersburg State University", which made its way to the International Space Station and back.

Please note: This information is raw content obtained directly from the source of the information. It is an accurate report of what the source claims and does not necessarily reflect the position of MIL-OSI or its clients.

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