Technical Physics最新文献

{"title":"Oblique Incidence of an Electromagnetic Wave on a Plane-Parallel Dielectric Plate","authors":"B. A. Belyaev,&nbsp;A. S. Voloshin,&nbsp;G. E. Selyutin,&nbsp;I. V. Govorun,&nbsp;R. G. Galeev","doi":"10.1134/S1063784225700057","DOIUrl":"10.1134/S1063784225700057","url":null,"abstract":"<p>Using electrodynamic analysis of the 3D model of a plane-parallel ideal dielectric plate, the propagation of plane linearly polarized electromagnetic waves is investigated in the case when their angle of incidence φ deviates from the normal to the plane of the plate. It is found that in the case of parallel polarization, when the electric field vector lies in the plane of incidence and magnetic field vector is parallel to the plane of plate, the Q factor of the observed half-wave resonance first decreases to its minimal value with increasing φ as the Brewster angle is approached, and then increases, tending to infinity as φ → 90°. In the case of perpendicular polarization, when the magnetic field vector lies in the plane of incidence and the electric field vector is parallel to the plane of the plate, the Q factor of the half-wave resonance gradually increases with increasing φ, also tending to infinity as φ → 90°. However, the dependences of the observed monotonic increase in the resonance frequencies with the angle of incidence are identical for both polarizations. The results of experiment with a plane-parallel plate made of ultrahigh molecular weight polyethylene with a dielectric constant of 2.5, which has been performed using broadband horn antennas, are in good agreement with the results of the electrodynamic calculation based on the 3D model.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 12","pages":"2727 - 2733"},"PeriodicalIF":1.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mathematical Models and Structures of the Vehicle Lateral Stability Stabilization System","authors":"A. M. Abakumov,&nbsp;A. A. Goryachkin,&nbsp;V. N. Ovsyannikov","doi":"10.1134/S1063784225700070","DOIUrl":"10.1134/S1063784225700070","url":null,"abstract":"<p>Currently, intensive research is being carried out to improve the operational characteristics of the car: vibration protection, smoothness, stability, and controllability. These properties are largely determined by the characteristics of the vehicle suspension, which provides a connection between the carrier system and the wheels of the vehicle. Significant attention is paid to the development of active suspensions, in which additional actuators are used to form the necessary characteristics, in particular, linear dc motors. The use of active actuators permits to control the position of the car body, including its lateral roll. In the article, relations are obtained that establish the dependence of additional elastic deformations in the suspension and the car roll angle on the centrifugal force in a stationary mode. When developing a linearized mathematical model of the control object for the study of nonstationary modes, a two-mass design scheme is used and operator equations are obtained that take into account the elastic–dissipative properties of the sprung and unsprung parts of the car, as well as an additional control action created by the actuator. It is shown that the dynamic properties of the studied control object can be approximately described by the transfer functions of a second-order aperiodic link or an oscillatory link. For the former case, a single-loop system was developed, which was closed in terms of the roll angle with a proportional-integral-derivative (PID) controller. In the latter situation, it is advisable to use a two-loop system with an internal flexible feedback loop for suspension deformation and an external loop closed for the roll angle using a PID controller. The possibility of forming a feedback signal in the strain rate of the suspension in the internal loop with the help of an EMF sensor of a linear dc motor is demonstrated. On the basis of the block diagram, a computer model of the system is developed, and for typical parameters of the control object, a study is made of transient processes of working off a disturbance in the form of a change in centrifugal force. Based on the simulation results, it was found that the use of the developed automatic control system (ACS) provides high accuracy in stabilizing the vehicle roll angle.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 12","pages":"2749 - 2756"},"PeriodicalIF":1.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of the Effect of Voltage Distortion on the Operation of the Main Elements of a Electric Arc Plasma Thermochemical Fuel Treatment Systems","authors":"V. V. Romanova,&nbsp;A. G. Batukhtin","doi":"10.1134/S1063784225600249","DOIUrl":"10.1134/S1063784225600249","url":null,"abstract":"<p>The work is devoted to the study of the influence of the electric energy quality on the service life of electrodes of a plasma thermochemical fuel treatment systems used in thermal power plants running on coal fuel. The issues of moving the near-electrode plasma section using magnetic-wave scanning are discussed in detail. The purpose of the work is to study and evaluate the effect of voltage distortion on the trajectory of the near-electrode plasma section with magnetic-wave scanning and subsequent changes in the service life of the plasmatron under certain operating conditions. The ANSYS Maxwell software was used as the main research tool. The computer simulation was performed with the following main experimental parameters: the coefficient of asymmetry in the zero sequence (<i>K</i>_0<i>U</i>) is 2% and 4%; the coefficient of asymmetry in the negative sequence (<i>K</i>_2<i>U</i>) is 2% and 4%; the voltage deviation δ<i>U</i>₍₊₎ is 5% and 10%; the materials used for manufacturing electrodes: copper (Cu), a pseudo-alloy of tungsten, nickel and copper (W + Ni + Cu), and a pseudo-alloy of molybdenum, tungsten, and copper (Mo + W + Cu). Based on the obtained simulation results, graphical representations of changes in the trajectories of the near-electrode plasma section under various distorting factors, dependences of changes in the values of specific erosion of various electrode materials, and graphical dependences of changes in the service life of electrodes of plasma systems are constructed. The studies performed using computer modeling based on the ANSYS Maxwell software product has made it possible to quantify the effect of voltage distortions on the trajectory of the near-electrode plasma section and, consequently, the service life of the plasmatron electrodes. In particular, in the course of the study, a detailed assessment and analysis of the degree of influence of the following indicators of electrical energy quality was performed: the coefficients of asymmetry in the negative and zero sequence and voltage deviations on the operation and technical condition of the electrodes of plasma systems. The results of the study are discussed, and recommendations are formulated for the plasma thermochemical fuel preparation systems used at thermal power plants to ignite the fuel of pulverized coal boilers.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 12","pages":"2766 - 2778"},"PeriodicalIF":1.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of Liquid Metal Droplets in Tokamaks and Plasma Devices (a Review)","authors":"A. V. Dedov,&nbsp;A. I. Aristov","doi":"10.1134/S1063784225600250","DOIUrl":"10.1134/S1063784225600250","url":null,"abstract":"<p>Record-long plasma confinement times in tokamaks could be attained using new methods of erosion protection of plasma-facing materials (including the use of liquid metals). This article reviews the publications on the application of liquid metal droplets in the form of droplet screens to improve the plasma confinement and to protect the vacuum chamber walls from thermal loads. The variants of designs of devices ensuring the injection of droplets into the volume occupied by the plasma and the main results are considered. Analysis of parameters of liquid metals being injected indicates the possibility of controlling the flow parameters such as the droplet size and velocity. The results of investigations show the possibility of using metals in the chamber without violating vacuum conditions and contamination of the plasma. Further experiments are required to substantiate the application of liquid metal droplet screens in plasma devices.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 12","pages":"2757 - 2765"},"PeriodicalIF":1.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphological Analysis of System Studies of Automatic Spacecrafts in a Synergetically Disturbing Environment","authors":"V. S. Kovtun","doi":"10.1134/S1063784225700069","DOIUrl":"10.1134/S1063784225700069","url":null,"abstract":"<p>The article considers the use of a new methodological cognitive-variable synergetic (CVS) approach to analysis of the problems in the theory of systems research conducted onboard automatic spacecrafts (AS) [1]. The methodology of the CVS approach is based on cybernetic [2] and synergetic [3] theories of dynamic systems management, as well as the methods of proactive management of the functioning of complex technical objects (CTOs), based on the concept of integrated modeling of CTO [2]. The results of the previously conducted morphological analysis of the problems in the theory of system cybernetic studies of the movement of dynamic systems are known and presented in the form of a morphological tree containing four branches (modeling–analysis–observation–choice) and leaves (particular tasks) [4]. The number of tasks is determined by the interaction of the control system (environment) with four types of effects of the disturbing environment (deterministic, stochastic, purposeful, and with unknown characteristics) in the formation of input effects on the control system. The CVS approach is based on the use of a new type of environment in the management of dynamic systems, viz., synergetically disturbing medium. To display the new environment and tasks on the morphological tree of problem analysis, in addition to the existing tasks of systemic cybernetic research, new leaves (particular tasks of systemic synergetic research) are introduced. The paradigm of problem analysis is formed on the basis of knowledge, management experience, and system research aimed at solving the problem of providing resources for onboard AS systems and the stability of their functioning during flight. The goal-setting of a new methodological approach to analysis of the problems in the theory of systems research is aimed at the rational use of the main structural and functional resources of the onboard systems, obtaining synergetic resources, and preventing failures caused by design and off-design abnormal processes. Further, the term “synergetic” will be applied to a type of resources that is formed by spontaneous self-organization of processes in management systems and transformed into purposeful self-organization in objectively existing polyadic relations describing synergetic mutual assistance and interrelations in the course of processes in a synergetically disturbing environment [5, 6].</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 12","pages":"2734 - 2748"},"PeriodicalIF":1.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Investigation of Technology for Relief Electron-Beam Modification of a Tungsten Surface","authors":"A. P. Sliva,&nbsp;D. A. Petrukhin,&nbsp;M. A. Potapov,&nbsp;E. P. Putzilova,&nbsp;E. V. Terent’ev","doi":"10.1134/S1063784224701135","DOIUrl":"10.1134/S1063784224701135","url":null,"abstract":"<p>In this study, the possibility of using Surfi-Sculpt technology for relief modification of the tungsten surface on a technological electron-beam equipment with an accelerating voltage of 60 kV and an electron gun of the ELA-60 type is investigated. The electron beam power density sufficient for intense evaporation of tungsten and obtaining a relief surface is determined. The dynamics of the surface relief growth rate is analyzed using a six-point star scanning as a function of the electron beam velocity and direction.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2698 - 2705"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of the Characteristics of Graphene Microribbon-Based Antenna Arrays","authors":"M. S. Nikitin,&nbsp;G. S. Makeeva","doi":"10.1134/S1063784224701159","DOIUrl":"10.1134/S1063784224701159","url":null,"abstract":"<p>Using CST MWS 2023 software, modeling of the S-parameters and the radiation patterns (RPs) of antenna arrays (AAs) based on rectangular graphene microribbons in the THz range has been carried out. It is shown that the unique property of graphene AAs is the possibility of electronic frequency scanning and multiband operation regime, as well as an increase in the gain factor, narrowing of the main RP lobe, a decrease in the level of the side RP lobes with an increase in the value of the chemical potential (from 0.2 to 1.0 eV), and their dependences on the number of AA emitters.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2688 - 2691"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of Sterilization of Medical Products for Bone Tissue Regeneration Using Supercritical Fluid Media","authors":"E. K. Rastegaev,&nbsp;I. I. Gilmutdinov,&nbsp;I. V. Kuznetsova,&nbsp;A. N. Sabirzyanov","doi":"10.1134/S1063784224701147","DOIUrl":"10.1134/S1063784224701147","url":null,"abstract":"<p>The aim of the work is to evaluate the effect of bone matrix modification by supercritical CO₂. The efficiency of bone matrix treatment with a supercritical fluid is established. Optimal parameters of the sterilization process are identified.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2692 - 2697"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase Equilibrium in a “Component of Asphalt−Resin−Paraffin Deposits–Propane/Butane Mixture” System","authors":"I. Z. Salikhov,&nbsp;V. F. Khairutdinov,&nbsp;I. Sh. Khabriev,&nbsp;F. M. Gumerov","doi":"10.1134/S1063784224701111","DOIUrl":"10.1134/S1063784224701111","url":null,"abstract":"<p>The characteristics of phase equilibria in cytane−propane/butane and diphenyl−propane/butane systems have been investigated in the temperature interval 403–443 K and the pressure range 1.0−6.8 MPa using a high-pressure optical cell. Type-I phase behavior has been found.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2675 - 2677"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Development of a Methodological Approach to Correcting Supply Voltage Quality in an Electrical Complex","authors":"V. V. Romanova,&nbsp;K. V. Suslov,&nbsp;A. G. Batukhtin","doi":"10.1134/S1063784224701007","DOIUrl":"10.1134/S1063784224701007","url":null,"abstract":"<p>The paper deals with aspects of the development of a methodological approach to normalizing the supply voltage quality in an electrical network by developing an algorithmized method for determining the rational installation location of symmetrization equipment in a motor-loaded electrical complex. The developed method makes it possible to implement processes aimed at ensuring efficient operation of the electrical complex in the presence of an electric motor load under low-quality supply voltage conditions. The proposed method based on software provides design procedures for calculating various options for symmetry and for choosing the most cost-effective technique. Attention is focused on the main criteria for evaluating decisions made in designing the location of symmetrization equipment in the electrical complex. The architecture and basic functional features of the application software as a tool for implementing the calculation method are reviewed. The software is intended for electrical calculations in the design, modernization, and operation of electrical networks. It includes drawing schematic diagrams of sections of electrical complexes with installed symmetrization equipment. The results are presented of experimental studies demonstrating the effectiveness of the developed method in solving problems of voltage symmetry in the supply electrical network. It is obvious that the developed approach based on automatic selection of locations for symmetrization equipment depending on the operating conditions of electric motor load makes it possible to automate the design procedures for voltage normalization in the electrical network. It minimizes voltage asymmetry in power supply and contributes to improving the operational reliability of low-voltage asynchronous motors. The study findings and prospects of using the developed approach are considered both for solving complex design problems and for the economic justification of local design solutions. A detailed analysis and formalization of the study results with relevant conclusions were carried out.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2662 - 2670"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}