Aimed at the characteristics of multi-source heterogeneity and the rapid generation of data in digital twin workshops, as well as the current situation where communication protocols between equipment within the workshop vary greatly and are difficult to interconnect, a data integration method based on OPC UA is designed. Firstly, combining the process flow and data source characteristics of array antenna assembly, a data collection and transmission scheme based on OPC UA was designed. Secondly, a process information model of array antenna assembly was established to realize data perception and transmission and solve the difficulties of complex data structure, high real-time requirements, and heterogeneous data in digital twin workshop. Finally, the proposed method and model were applied to the performance prediction platform for an array antenna assembly process based on digital twins, achieving perception of process data during the assembly process of array antennas, and achieving performance prediction and visualization for various stages of array antennas based on assembly process data.

Main distinctive features of electrohydraulic presses (EH-presses) for large-dimensional articles manufacturing are considered. It is shown that EH-presses demonstrate the maximum efficiency at large-dimensional articles forming. Direct scaling of conventional design presses with low level of saved energy for increasing their technological possibilities and saved energy isn’t effective due to some reasons.To ground theoretical knowledge about possibilities of temporary-spatial control, energy flows managing and saved energy increasing of EH-installations series of analytical, numerical simulations and natural experiments was done. These experiments were devoted to studying processes of transferring energy from the zone of discharge to the object of processing.Generally, results of such research were adequate and complemented to each other. These results approved possibility of significant increasing (up to ten times) of energy that releases in a single discharge without crucial reduction of technological equipment resistance and increasing duration of technological cycle of large amount of released energy.Scientific research devoted to energy transformation from its electrical form to mechanical work of plastic deformation allowed us to develop and realize practically multi-contour EH-press with saved energy up to 500 kJ. Experimental-industrial research for realization technology of consequent local loading was proved by some types of large-dimensional sheet articles. The quality of obtained articles was elevated; resources consumption was reduced. Results of improving process of articles forming and perfection of forming process parameters are shown.Results of experimental-industrial experience of technological processes of articles forming are analyzed. For such processes managing of loading field topology is quite necessary. The most crucial steps for perfectioning arrangement of energy releasing devices are developed.This study was caused by the necessity of operational electrodes lifetime increasing because they are subjected to very intensive wear during operation.Comparison of large-dimensional articles manufacturing efficiency with alternative manufacturing methods is given.Goal of the paper is to expand knowledge of specialists with EH-presses having possibility both to form articles with elevated precision and quality and widen level of technological processes.Main tasks: estimationof workability of multi-contour EH-press equipped with multi-electrode discharge blocks; estimationof possibilities of temporary-spatial control of loading in application to adding auxiliary nomenclature groups of sheet articles which can be produced by forming; determination possibilities of perfectioning of all elements of technological equipment to increase labor efficiency; comparison of technical-economic indexes for different technologies of forming for large-dimensional sheet articles;

With the development of intelligent transportation systems, platooning can reduce vehicle aerodynamic drag by decreasing spacing between vehicles, improving transportation efficiency and reducing emissions. However, it is difficult for existing models to enable dynamic adjustment and real-time feedback. Therefore, this study proposes a digital twin system for real-time drag coefficient prediction using stacking ensemble learning. First, 2000 datasets of pressure distributions and drag coefficients under varying spacings were obtained through simulations. Then, an online prediction model for the aerodynamic performance of platooning vehicles was then constructed, realizing real-time drag coefficient prediction, and verifying the model performance using computational fluid dynamics data. The results indicate that the model proposed achieves 98.56% prediction accuracy, significantly higher than that of the traditional BP model (75.78%), and effectively captures the nonlinear relationship between vehicle spacing and drag coefficient. The influence mechanism of vehicle spacing on the aerodynamic performance of platooning vehicles revealed in this study enables high-precision real-time prediction under dynamic parameters.

The article describes the results of experimental work on substantiating the possibility of using electrode systems of directed influence for electrohydraulic sequential stamping of large-sized sheet metal parts. These systems generate a concentrated flow of energy, which is directed in the desired direction and in specific places. Thus, these systems reduce energy consumption in arbitrary directions.It is shown that in many cases of successful use of this type of forming of sheet metal parts, the mechanism of loading a blank with shock waves is considered, which propagate in all directions of the discharge volume and transfer a certain fraction of the released energy. When stamping large parts, due to their large dimensions, with such a loading mechanism, part of the energy is used unproductively. To increase the efficiency of energy use, it is necessary to use electrode systems of directed influence.The research was carried out in stages - first preliminary computer modeling, and then physical modeling.The computer simulation of the process revealed the mechanism of loading the blank with high-energy submerged liquid jets. The presented results of field studies confirmed the mechanism of such loading.Physical modeling was carried out using complex techniques using high-speed registration of the object's motion and electrical methods for registering rapidly changing parameters.Experimentally obtained dependences of the distribution of the energy flux density coming from the discharge cavities of such systems. Empirical dependences of the energy flux density, pressure pulse and other parameters depending on the conditions of the stamping process were synthesized.The goal of the work is to increase the efficiency of stamping large sheet metal parts by more rational and productive conversion of electrical energy into plastic forming work.The tasks set have been completed. Conclusions have been obtained that predict positive results.Methods used in the study. The study used the method of computer modeling, experimental studies, which include high-speed photographic reading, recording of oscillograms of pulse parameters.

Fe-based amorphous coatings are promising for corrosion protection in marine environments, yet their long-term performance after sealing treatment under salt-spray exposure remains unclear. In this study, two atmospheric plasma-sprayed Fe-based amorphous coatings, APS3 and APS5, prepared at different H ₂ flow rates, were sealed using a brush-applied nano-alumina sealant. The microstructure and corrosion behavior of the coatings, before and after sealing, were systematically evaluated by porosity analysis, scanning electron microscopy, x-ray diffraction, potentiodynamic polarization, and electrochemical impedance spectroscopy during 3 weeks of salt-spray exposure. The results showed that the as-sprayed coatings retained a predominantly amorphous structure and exhibited porous features. Sealing treatment reduced the porosity of APS3 and APS5 from (4.76 ± 0.5)% to (2.64 ± 0.5)% and from (3.32 ± 0.5)% to (1.58 ± 0.5)%, respectively. During the first two weeks of exposure, the sealed coatings showed higher corrosion potentials, lower corrosion current densities, and larger impedance responses than the corresponding unsealed coatings. APS5 consistently exhibited superior corrosion resistance, attributed to its lower porosity and denser microstructure. After 21 d, sealant degradation and detachment became evident, accompanied by a marked decline in corrosion resistance. These findings indicate that sealing treatment can effectively improve the salt-spray corrosion resistance of Fe-based amorphous coatings for approximately two weeks, and provide guidance for the design and durability evaluation of protective coating systems intended for marine service environments.

The material selection method is critically evaluated to enable high pressure (HP) turbine blades to deal with in-service damaging phenomena such as creep, low cycle fatigue and high cycle fatigue, oxidation and corrosion. The material selection method is analyzed in order to improve the service life of the aero engine. To increase the turbine inlet temperature, HP turbine blades need improved creep and fatigue resistance. more quality. By the typical working condition of HP turbine blade, using CES Edu Pack (CES) material selection software was used to select suitable materials for HP turbine blade material. Nickel based alloys are selected for HP turbine blades, such as Nickel-Cr-Co-Mo superalloy.