Pub Date : 2023-06-01DOI: 10.18698/0536-1044-2023-6-58-65
I. Shubin, A. .. Popova
The paper considers production process of the highly porous carbon material. Based on the results of the analysis of such production chemical characteristics and experimental studies, areas for improving the technological process and equipment were identified that could increase productivity and safety of the work process. This could be achieved by intensifying the chemical reactions in the activation reactor by optimizing the regime parameters, using the rational equipment designs that optimize the motion (supply, removal and mixing) of the material flows, as well as by introducing technical solutions that increase production safety by separating or dividing part of the products resulting from the activation. These approaches would make it possible to simplify and intensify the work process and the equipment used, for example, by combining certain operations. Based on the results of the research, as well as on the analysis of the literary sources, design and technological measures are proposed to implement the indicated approaches for improving equipment and technology.
{"title":"Improving hardware and technological design of the highly porous carbon material production","authors":"I. Shubin, A. .. Popova","doi":"10.18698/0536-1044-2023-6-58-65","DOIUrl":"https://doi.org/10.18698/0536-1044-2023-6-58-65","url":null,"abstract":"The paper considers production process of the highly porous carbon material. Based on the results of the analysis of such production chemical characteristics and experimental studies, areas for improving the technological process and equipment were identified that could increase productivity and safety of the work process. This could be achieved by intensifying the chemical reactions in the activation reactor by optimizing the regime parameters, using the rational equipment designs that optimize the motion (supply, removal and mixing) of the material flows, as well as by introducing technical solutions that increase production safety by separating or dividing part of the products resulting from the activation. These approaches would make it possible to simplify and intensify the work process and the equipment used, for example, by combining certain operations. Based on the results of the research, as well as on the analysis of the literary sources, design and technological measures are proposed to implement the indicated approaches for improving equipment and technology.","PeriodicalId":198502,"journal":{"name":"Proceedings of Higher Educational Institutions. Маchine Building","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123977765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-01DOI: 10.18698/0536-1044-2023-6-99-107
L. Mukhamedov, D. A. Kirievskii
Ultralight launch vehicles are among the most efficient means of inserting small satellites in the target orbits. Particular ballistic design problems being solved at the early stages in the ultralight launch vehicles development include rather actual selection of the most advantageous combination of the so-called design-ballistic parameters. They are usually understood as a set of the minimum possible number of parameters that, for a given payload mass, uniquely determine the rocket trajectory and its mass-energy characteristics. The paper considers issues related to selection of the thrust-to-weight ratio (launch load on thrust) of the first stages of disposable ultralight launch vehicles. This parameter is not included in the K. Tsiolkovsky formula; it determines the loss in the characteristic velocity for gravity, aerodynamics and backpressure. In this regard, its influence on the final rocket velocity is not that significant in comparison with such parameters as the specific void impulse or the relative final mass of the first stage. Selection of the optimal launch load on the rocket thrust is a responsible task, since it is determined by the thrust-to-weight ratio. Not only the mass, but also the cost of the designed product depends on its value. In addition to the specific void pulse, the relative final mass and the launch thrust load, the first stage design and ballistic parameters include the specific thrust pulse at the Earth surface (or the propulsion system altitude coefficient) and the load on the midsection.
{"title":"Selection of the optimal thrust-to-weight ratio of the first stages of small-lift launch vehicles","authors":"L. Mukhamedov, D. A. Kirievskii","doi":"10.18698/0536-1044-2023-6-99-107","DOIUrl":"https://doi.org/10.18698/0536-1044-2023-6-99-107","url":null,"abstract":"Ultralight launch vehicles are among the most efficient means of inserting small satellites in the target orbits. Particular ballistic design problems being solved at the early stages in the ultralight launch vehicles development include rather actual selection of the most advantageous combination of the so-called design-ballistic parameters. They are usually understood as a set of the minimum possible number of parameters that, for a given payload mass, uniquely determine the rocket trajectory and its mass-energy characteristics. The paper considers issues related to selection of the thrust-to-weight ratio (launch load on thrust) of the first stages of disposable ultralight launch vehicles. This parameter is not included in the K. Tsiolkovsky formula; it determines the loss in the characteristic velocity for gravity, aerodynamics and backpressure. In this regard, its influence on the final rocket velocity is not that significant in comparison with such parameters as the specific void impulse or the relative final mass of the first stage. Selection of the optimal launch load on the rocket thrust is a responsible task, since it is determined by the thrust-to-weight ratio. Not only the mass, but also the cost of the designed product depends on its value. In addition to the specific void pulse, the relative final mass and the launch thrust load, the first stage design and ballistic parameters include the specific thrust pulse at the Earth surface (or the propulsion system altitude coefficient) and the load on the midsection.","PeriodicalId":198502,"journal":{"name":"Proceedings of Higher Educational Institutions. Маchine Building","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117221742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-01DOI: 10.18698/0536-1044-2023-6-39-46
G. Timofeev, I. Z. Kataev, D. Samsonenko
Fossil fuel based on the hydrocarbons appears to be the main source of energy due to its high combustion specifics. However, the fossil fuel resources are depleting, thus making it increasingly necessary to design and develop a universal engine capable of running not only on various types of fossil fuels, but also on the renewable energy sources. An example of such an engine is the beta-type Stirling engine. Design and development of the drive mechanism for such Stirling engine configuration is an important part in designing the power unit as a whole. To ensure long-term and trouble-free operation of such an engine, the rhombic drive mechanism should not have any redundant connections. Creating a mechanism without redundant connections is a difficult task. To solve it using the graph method, structural analysis of the rhombic drive mechanism with the advanced connecting rod in the displacement group was carried out.
{"title":"Structural analysis of a rhombic mechanism with the advanced connecting rod in the Stirling engine replacing group","authors":"G. Timofeev, I. Z. Kataev, D. Samsonenko","doi":"10.18698/0536-1044-2023-6-39-46","DOIUrl":"https://doi.org/10.18698/0536-1044-2023-6-39-46","url":null,"abstract":"Fossil fuel based on the hydrocarbons appears to be the main source of energy due to its high combustion specifics. However, the fossil fuel resources are depleting, thus making it increasingly necessary to design and develop a universal engine capable of running not only on various types of fossil fuels, but also on the renewable energy sources. An example of such an engine is the beta-type Stirling engine. Design and development of the drive mechanism for such Stirling engine configuration is an important part in designing the power unit as a whole. To ensure long-term and trouble-free operation of such an engine, the rhombic drive mechanism should not have any redundant connections. Creating a mechanism without redundant connections is a difficult task. To solve it using the graph method, structural analysis of the rhombic drive mechanism with the advanced connecting rod in the displacement group was carried out.","PeriodicalId":198502,"journal":{"name":"Proceedings of Higher Educational Institutions. Маchine Building","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114714619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-01DOI: 10.18698/0536-1044-2023-6-30-38
Y.G. Popov, G.S. Malov, A. Krasnikov
The article discusses the vibration exciter of a vibratory roller, including a hollow eccentric weight located inside with a fluent mass. This design makes it possible to reduce the negative effects of shocks and resonance phenomena during reversal and acceleration of the unbalanced shaft. However, in the scientific literature there is no information about the methods for designing such vibration exciters. It is also unclear the movement of the fluent mass inside the eccentric weight during its acceleration and during uniform rotation. In this regard, dynamic modeling was carried out, which made it possible to identify the characteristic features of the movement of the internal mass. Based on this information, a method was proposed for determining the volume of the loose internal mass and its working eccentricity. A parametrized model of unbalance and fluent mass for steady motion was built and multicriteria optimization was carried out using the IOSO NM software package for controlled parameters. The above technique allows designing vibration exciters with specified vibration characteristics for various types of vibratory rollers.
{"title":"Modeling and optimization of two-amplitude eccentric weight with fluent inner mass","authors":"Y.G. Popov, G.S. Malov, A. Krasnikov","doi":"10.18698/0536-1044-2023-6-30-38","DOIUrl":"https://doi.org/10.18698/0536-1044-2023-6-30-38","url":null,"abstract":"The article discusses the vibration exciter of a vibratory roller, including a hollow eccentric weight located inside with a fluent mass. This design makes it possible to reduce the negative effects of shocks and resonance phenomena during reversal and acceleration of the unbalanced shaft. However, in the scientific literature there is no information about the methods for designing such vibration exciters. It is also unclear the movement of the fluent mass inside the eccentric weight during its acceleration and during uniform rotation. In this regard, dynamic modeling was carried out, which made it possible to identify the characteristic features of the movement of the internal mass. Based on this information, a method was proposed for determining the volume of the loose internal mass and its working eccentricity. A parametrized model of unbalance and fluent mass for steady motion was built and multicriteria optimization was carried out using the IOSO NM software package for controlled parameters. The above technique allows designing vibration exciters with specified vibration characteristics for various types of vibratory rollers.","PeriodicalId":198502,"journal":{"name":"Proceedings of Higher Educational Institutions. Маchine Building","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130757861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-01DOI: 10.18698/0536-1044-2023-6-12-29
V. Pozhbelko
The paper presents general theory of structural synthesis of the self-aligning lever mechanisms consisting of closed circuits without harmful excess connections and operating in the given full space with the number of freedom degrees of h (1 ? h ? 6). This theory includes new analytical structural dependences of the input and output parameters to construct mechanisms missing the redundant connections and designed for directed structural synthesis and analysis, taking into account the new trigonometric objective function of the structural synthesis, angular structural equations and extended structural mathematical model of all possible self-aligning mechanisms. Effectiveness of the structural synthesis proposed general theory was confirmed by examples of structures (at the inventions level) built on the basis of cylindrical hinges with the different possible mutual arrangement of their axes. They include vibration mechanism with the elastic dynamic bonds, space flat manipulator of the spatial mixer, folding articulated manipulator, multi-capacity turbulent mixer and spatial parallelogram manipulator without special uncontrolled and “dead” positions. Operability of all synthesized lever mechanisms designed to operate in the homogeneous and mixed spaces was theoretically confirmed according to a new universal (unified) structural formula for calculating the mechanism mobility, as well as by the prepared experimental models of the operating mechanisms made on the basis of new single-moving rotational kinematic pairs.
{"title":"An General theory of structural synthesis of normal, paradoxical Self- Aligning lever mechanisms and the practice of their creation in mechanical engineering for operation in different h-spaces","authors":"V. Pozhbelko","doi":"10.18698/0536-1044-2023-6-12-29","DOIUrl":"https://doi.org/10.18698/0536-1044-2023-6-12-29","url":null,"abstract":"The paper presents general theory of structural synthesis of the self-aligning lever mechanisms consisting of closed circuits without harmful excess connections and operating in the given full space with the number of freedom degrees of h (1 ? h ? 6). This theory includes new analytical structural dependences of the input and output parameters to construct mechanisms missing the redundant connections and designed for directed structural synthesis and analysis, taking into account the new trigonometric objective function of the structural synthesis, angular structural equations and extended structural mathematical model of all possible self-aligning mechanisms. Effectiveness of the structural synthesis proposed general theory was confirmed by examples of structures (at the inventions level) built on the basis of cylindrical hinges with the different possible mutual arrangement of their axes. They include vibration mechanism with the elastic dynamic bonds, space flat manipulator of the spatial mixer, folding articulated manipulator, multi-capacity turbulent mixer and spatial parallelogram manipulator without special uncontrolled and “dead” positions. Operability of all synthesized lever mechanisms designed to operate in the homogeneous and mixed spaces was theoretically confirmed according to a new universal (unified) structural formula for calculating the mechanism mobility, as well as by the prepared experimental models of the operating mechanisms made on the basis of new single-moving rotational kinematic pairs.","PeriodicalId":198502,"journal":{"name":"Proceedings of Higher Educational Institutions. Маchine Building","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122554958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-01DOI: 10.18698/0536-1044-2023-6-89-98
P.Yu. Malyshkin, A. N. Kartashevich, S. Plotnikov, G. E. Zabolotskikh
The paper presents theoretical and experimental studies of the working process of the 4ChN 11.0/12.5 (D-245.5S2) diesel engine operating on diesel fuel with addition of the liquefied hydrocarbon gas by a separate system into the intake manifold. Regression dependences were obtained of the relative specific effective fuel consumption and the main ecological indicators of the diesel exhaust gases on the fuel injection advance angle. Dependences are provided of torque, specific effective fuel consumption, maximum cylinder pressure, working process rigidity, content of solid particles and nitrogen oxides, as well as of total emission, on the amount of the supplied liquefied hydrocarbon gas into the diesel engine. The indicator diagram and the diesel engine heat release characteristic were analyzed with operation on the diesel fuel and with addition of the liquefied hydrocarbon gas. The experimental setup is described. Theoretical and experimental results were compared. The amount of liquefied hydrocarbon gas supplied to the diesel engine not exceeding 30% of the diesel fuel consumption was substantiated. Convergence of experimental and theoretical data at the level of 6.3% was confirmed. It was established that the diesel engine operation with addition of up to 30% of the liquefied hydrocarbon gas made it possible to reduce total emission of the particulate matter and of the nitrogen oxides in the exhaust gases by 20.2%.
{"title":"Influence of using the liquefied hydrocarbon gas in adjustment, operation and heat generation of the tractor diesel engine","authors":"P.Yu. Malyshkin, A. N. Kartashevich, S. Plotnikov, G. E. Zabolotskikh","doi":"10.18698/0536-1044-2023-6-89-98","DOIUrl":"https://doi.org/10.18698/0536-1044-2023-6-89-98","url":null,"abstract":"The paper presents theoretical and experimental studies of the working process of the 4ChN 11.0/12.5 (D-245.5S2) diesel engine operating on diesel fuel with addition of the liquefied hydrocarbon gas by a separate system into the intake manifold. Regression dependences were obtained of the relative specific effective fuel consumption and the main ecological indicators of the diesel exhaust gases on the fuel injection advance angle. Dependences are provided of torque, specific effective fuel consumption, maximum cylinder pressure, working process rigidity, content of solid particles and nitrogen oxides, as well as of total emission, on the amount of the supplied liquefied hydrocarbon gas into the diesel engine. The indicator diagram and the diesel engine heat release characteristic were analyzed with operation on the diesel fuel and with addition of the liquefied hydrocarbon gas. The experimental setup is described. Theoretical and experimental results were compared. The amount of liquefied hydrocarbon gas supplied to the diesel engine not exceeding 30% of the diesel fuel consumption was substantiated. Convergence of experimental and theoretical data at the level of 6.3% was confirmed. It was established that the diesel engine operation with addition of up to 30% of the liquefied hydrocarbon gas made it possible to reduce total emission of the particulate matter and of the nitrogen oxides in the exhaust gases by 20.2%.","PeriodicalId":198502,"journal":{"name":"Proceedings of Higher Educational Institutions. Маchine Building","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131164477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-01DOI: 10.18698/0536-1044-2023-6-72-78
N. Velikanov, V. Naumov
Cooling and lubrication are the most important processes in such operations as the metal workpiece cutting, drilling and grinding. It becomes necessary in machining a workpiece to supply the lubricating and cooling fluids to the tool operation zone in the required amount, which is provided by the pump and the connecting pipeline. Pump operation essentially depends on properties of the lubricating and cooling fluid, in particular, on its viscosity affecting the flow, pressure and energy costs. The paper propose an algorithm for determining the pump hydraulic characteristics, when supplying the lubricating and cooling fluid. As an example, the submersible vertical centrifugal pumps were considered designed for using in the machines cooling systems and systems supplying the lubricating and cooling fluid. Empirical dependences are presented of the pump head, consumed power, efficiency and indicator of the specific energy cost on the water supply. The obtained dependences were recalculated for the pump operating conditions with liquids, which viscosity was much higher than that of water. It is shown that viscosity significantly changes the pump characteristics during its operation in the network.
{"title":"Efficiency of the pump in the lubricating and cooling fluid supply system","authors":"N. Velikanov, V. Naumov","doi":"10.18698/0536-1044-2023-6-72-78","DOIUrl":"https://doi.org/10.18698/0536-1044-2023-6-72-78","url":null,"abstract":"Cooling and lubrication are the most important processes in such operations as the metal workpiece cutting, drilling and grinding. It becomes necessary in machining a workpiece to supply the lubricating and cooling fluids to the tool operation zone in the required amount, which is provided by the pump and the connecting pipeline. Pump operation essentially depends on properties of the lubricating and cooling fluid, in particular, on its viscosity affecting the flow, pressure and energy costs. The paper propose an algorithm for determining the pump hydraulic characteristics, when supplying the lubricating and cooling fluid. As an example, the submersible vertical centrifugal pumps were considered designed for using in the machines cooling systems and systems supplying the lubricating and cooling fluid. Empirical dependences are presented of the pump head, consumed power, efficiency and indicator of the specific energy cost on the water supply. The obtained dependences were recalculated for the pump operating conditions with liquids, which viscosity was much higher than that of water. It is shown that viscosity significantly changes the pump characteristics during its operation in the network.","PeriodicalId":198502,"journal":{"name":"Proceedings of Higher Educational Institutions. Маchine Building","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133498395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-01DOI: 10.18698/0536-1044-2023-6-66-71
Y. Kabaldin, A. Bashkov, I.D. Zamuraev, S. Ivanov
The paper reveals and studies the mechanism of the carbide cutting tool wear associated with the vortex deformation modes in the chip near-cutting layers. High deformation degree in the chip near-contact layers causes amorphization of local volumes and rotation of the particles of the material being machined. It is shown that, the torque is additionally acting on the carbide phase grain in contrast to the laminar motion of chip particles in the vortex motion. This circumstance both increases the grains swing amplitude and facilitates their extraction. The ways to increase wear resistance of the carbide tools by deposition of the hard coatings are indicated. Mechanism is described for improving the tool life with the coating deposition on it.
{"title":"Vortex wear mechanism of the carbide tools","authors":"Y. Kabaldin, A. Bashkov, I.D. Zamuraev, S. Ivanov","doi":"10.18698/0536-1044-2023-6-66-71","DOIUrl":"https://doi.org/10.18698/0536-1044-2023-6-66-71","url":null,"abstract":"The paper reveals and studies the mechanism of the carbide cutting tool wear associated with the vortex deformation modes in the chip near-cutting layers. High deformation degree in the chip near-contact layers causes amorphization of local volumes and rotation of the particles of the material being machined. It is shown that, the torque is additionally acting on the carbide phase grain in contrast to the laminar motion of chip particles in the vortex motion. This circumstance both increases the grains swing amplitude and facilitates their extraction. The ways to increase wear resistance of the carbide tools by deposition of the hard coatings are indicated. Mechanism is described for improving the tool life with the coating deposition on it.","PeriodicalId":198502,"journal":{"name":"Proceedings of Higher Educational Institutions. Маchine Building","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114267188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-01DOI: 10.18698/0536-1044-2023-5-74-89
L. Grekhov, N.A. Arsenov, E. Salykin, Jianhuey Zhao
The paper substantiates the use of a simple and convenient Cole equation form of state making it possible to quickly and with sufficient accuracy determine density, compressibility coefficient and speed of sound of the fuel mixtures at high and ultrahigh injection pressures. A method is described for calculating these elastic properties of the fuel mixtures using the constants of the state equation selected in the form of expressions that determine dependence of the constants on the temperature. Expediency of introducing the universal correction factors is shown, which allows refining calculated values of the fuel mixture elastic properties. Processed experimental data from the literature sources and conducted studies formed the basis to obtain empirical coefficients to determine the correction factors that are refining values of the arbitrary composition mixture properties. The described method and the found coefficients make it possible to hydrodynamically calculate the fuel supply process using modern mathematical models and to design new fuel systems with the higher injection parameters.
{"title":"Calculation and correction of the fuel mixture elastic properties values","authors":"L. Grekhov, N.A. Arsenov, E. Salykin, Jianhuey Zhao","doi":"10.18698/0536-1044-2023-5-74-89","DOIUrl":"https://doi.org/10.18698/0536-1044-2023-5-74-89","url":null,"abstract":"The paper substantiates the use of a simple and convenient Cole equation form of state making it possible to quickly and with sufficient accuracy determine density, compressibility coefficient and speed of sound of the fuel mixtures at high and ultrahigh injection pressures. A method is described for calculating these elastic properties of the fuel mixtures using the constants of the state equation selected in the form of expressions that determine dependence of the constants on the temperature. Expediency of introducing the universal correction factors is shown, which allows refining calculated values of the fuel mixture elastic properties. Processed experimental data from the literature sources and conducted studies formed the basis to obtain empirical coefficients to determine the correction factors that are refining values of the arbitrary composition mixture properties. The described method and the found coefficients make it possible to hydrodynamically calculate the fuel supply process using modern mathematical models and to design new fuel systems with the higher injection parameters.","PeriodicalId":198502,"journal":{"name":"Proceedings of Higher Educational Institutions. Маchine Building","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126851608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-01DOI: 10.18698/0536-1044-2023-5-90-100
A. Kuznetsov, S. Kharitonov, S.A. Kamenskikh
The paper considers issues of using a neural network in the thermal engine controller in order to improve the quality of its control and setting conveniences. The study object was a speed controller for the D500 promising locomotive diesel engine. Tasks for design and development of a neural network controller were formulated, and the network input signals were determined. To adjust the neural network, the reinforcement learning method was introduced, where it interacted with the diesel engine computer model in a closed system. The criterion in setting up the network was the accuracy of the control program execution. A system of rewards was assigned, according to which the network was learning. Based on the results of studying the neural network controller influence on the quality of the control system operation, the network minimum possible composition for solving the problem presented was determined. Study results are presented in the form of graphs of rewards alteration during the learning process for various options of the neural network controller structure, as well as the control system simulated transient processes over the entire range of the diesel engine speed.
{"title":"On the issue of developing the diesel engine neural network controller","authors":"A. Kuznetsov, S. Kharitonov, S.A. Kamenskikh","doi":"10.18698/0536-1044-2023-5-90-100","DOIUrl":"https://doi.org/10.18698/0536-1044-2023-5-90-100","url":null,"abstract":"The paper considers issues of using a neural network in the thermal engine controller in order to improve the quality of its control and setting conveniences. The study object was a speed controller for the D500 promising locomotive diesel engine. Tasks for design and development of a neural network controller were formulated, and the network input signals were determined. To adjust the neural network, the reinforcement learning method was introduced, where it interacted with the diesel engine computer model in a closed system. The criterion in setting up the network was the accuracy of the control program execution. A system of rewards was assigned, according to which the network was learning. Based on the results of studying the neural network controller influence on the quality of the control system operation, the network minimum possible composition for solving the problem presented was determined. Study results are presented in the form of graphs of rewards alteration during the learning process for various options of the neural network controller structure, as well as the control system simulated transient processes over the entire range of the diesel engine speed.","PeriodicalId":198502,"journal":{"name":"Proceedings of Higher Educational Institutions. Маchine Building","volume":"42 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114091254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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