Pub Date : 2021-12-30DOI: 10.22363/2312-8143-2021-22-4-323-328
V. V. Karnevich
General representation of ship geometry is given by the method of slicing the ship hull by three mutually perpendicular planes: vertical symmetry plane which runs along the middle of hull width, horizontal plane which divides the hull into underwater and abovewater parts, and vertical plane perpendicular to the other two which coincides with midsection. By taking the same three predefined sections of the theoretical hull shape, it is possible to obtain three algebraic surfaces of different order, which are called hydrodynamic in this article. By introducing alphabetic parameters to signify orders of ship skeleton main curves and then by giving them various numerical values, it is possible to consider a large number of hull shapes, having only three explicit surface equations. Method of deriving the equations, obtained by other authors, using only three explicit algebraic equations is demonstrated. The proposed technique is illustrated on six new ship hull shapes.
{"title":"Hydrodynamic surfaces with midsection in the form of Lame curve","authors":"V. V. Karnevich","doi":"10.22363/2312-8143-2021-22-4-323-328","DOIUrl":"https://doi.org/10.22363/2312-8143-2021-22-4-323-328","url":null,"abstract":"General representation of ship geometry is given by the method of slicing the ship hull by three mutually perpendicular planes: vertical symmetry plane which runs along the middle of hull width, horizontal plane which divides the hull into underwater and abovewater parts, and vertical plane perpendicular to the other two which coincides with midsection. By taking the same three predefined sections of the theoretical hull shape, it is possible to obtain three algebraic surfaces of different order, which are called hydrodynamic in this article. By introducing alphabetic parameters to signify orders of ship skeleton main curves and then by giving them various numerical values, it is possible to consider a large number of hull shapes, having only three explicit surface equations. Method of deriving the equations, obtained by other authors, using only three explicit algebraic equations is demonstrated. The proposed technique is illustrated on six new ship hull shapes.","PeriodicalId":53011,"journal":{"name":"RUDN Journal of Engineering Researches","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44327916","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 : 2021-12-30DOI: 10.22363/2312-8143-2021-22-4-329-338
Oleg I. Telkov, Anastasia D. Kosmacheva, A. Khodyakov, S. Khlopkov, I. Danilov
The results of diagnostics of antifreeze indicators before and after their operation in an internal combustion engine are presented. The chosen direction of research is relevant, since it allows one to predict not only the change in the properties of antifreeze during its operation, but also to obtain evidence of the course of metal corrosion processes. The purpose of the study - to conduct control tests of antifreezes before and after their operation in an internal combustion engine, that ensures the maintenance of the power unit in good condition. The objects of study were fresh AGA Z-40-G12++ antifreeze (release of 2021; A-21) and coolant AGA Z-40-G12+ (release of 2012; AE-12) after its operation for several years. It is shown that the pH, density, viscosity, electrical conductivity of the coolant samples before and after its operation are different. It was found that the course of the dependences of electrical conductivity on temperature t for samples A-21 and AE-12 is the same. The dependence of on t is described by a polynomial (quadratic) model. It has been suggested that higher values of the AE-12 hydrogen index may indicate the occurrence of electrochemical corrosion of metals, which, in the process of contact with antifreeze, form short-circuited galvanic pairs. With the help of a complete factorial experiment, it was demonstrated that higher pH values of used antifreeze can be a reflection of the degradation of the properties of monoethylene glycol and the ongoing processes of metal corrosion.
介绍了内燃机防冻指示器运行前后的诊断结果。所选择的研究方向是相关的，因为它不仅允许人们预测防冻液在其运行过程中性能的变化，而且还可以获得金属腐蚀过程的证据。本研究的目的是对内燃机运行前后的防冻液进行控制试验，以确保动力单元处于良好状态。研究对象为新鲜AGA z -40- g12++防冻液(2021年发布;A-21)和冷却剂AGA Z-40-G12+(2012年发布;AE-12)运行数年后。结果表明，冷却液运行前后样品的pH值、密度、粘度、电导率均有差异。结果表明，A-21和AE-12的电导率随温度变化的过程是相同的。对t的依赖用多项式(二次)模型来描述。研究表明，AE-12氢指数较高可能表明金属在与防冻液接触过程中发生了电化学腐蚀，形成了短路的电偶。通过完全析因实验，证明了使用过的防冻液的较高pH值可以反映单乙二醇性能的降解和正在进行的金属腐蚀过程。
{"title":"Analysis of antifreeze properties before and after their operation in engine","authors":"Oleg I. Telkov, Anastasia D. Kosmacheva, A. Khodyakov, S. Khlopkov, I. Danilov","doi":"10.22363/2312-8143-2021-22-4-329-338","DOIUrl":"https://doi.org/10.22363/2312-8143-2021-22-4-329-338","url":null,"abstract":"The results of diagnostics of antifreeze indicators before and after their operation in an internal combustion engine are presented. The chosen direction of research is relevant, since it allows one to predict not only the change in the properties of antifreeze during its operation, but also to obtain evidence of the course of metal corrosion processes. The purpose of the study - to conduct control tests of antifreezes before and after their operation in an internal combustion engine, that ensures the maintenance of the power unit in good condition. The objects of study were fresh AGA Z-40-G12++ antifreeze (release of 2021; A-21) and coolant AGA Z-40-G12+ (release of 2012; AE-12) after its operation for several years. It is shown that the pH, density, viscosity, electrical conductivity of the coolant samples before and after its operation are different. It was found that the course of the dependences of electrical conductivity on temperature t for samples A-21 and AE-12 is the same. The dependence of on t is described by a polynomial (quadratic) model. It has been suggested that higher values of the AE-12 hydrogen index may indicate the occurrence of electrochemical corrosion of metals, which, in the process of contact with antifreeze, form short-circuited galvanic pairs. With the help of a complete factorial experiment, it was demonstrated that higher pH values of used antifreeze can be a reflection of the degradation of the properties of monoethylene glycol and the ongoing processes of metal corrosion.","PeriodicalId":53011,"journal":{"name":"RUDN Journal of Engineering Researches","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43165723","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 : 2021-12-30DOI: 10.22363/2312-8143-2021-22-4-364-372
A. E. Unitsky, S. A. Pronkevich, Sergei V. Artyushevsky, Vitali V. Looksha
The paper presents an alternative to rockets general planetary vehicle (GPV) and industrial space necklace Orbit (ISN Orbit), which are a single complex necessary for the non-rocket near space exploration. The authors analyzed the conceptual design of the GPV and ISN Orbit, described their main characteristics, compared the impact of the GPV and launch vehicles on the Earthэs ecology. The principle of the GPV movement is based on centrifugal forces arising from the GPV acceleration in the plane of the equator. This is the main difference from rocket engines, which principle of operation is set up on the use of jet motion. The differentiation in the operation principles of the GPV and launch vehicles leads to serious variety in the energy required to lift the GPV to the near-Earth orbit and, accordingly, the variety in cost per payload ton. The concept of the ISN Orbit is described. The complex should serve as a basis for the removal of harmful industry to the near-Earth orbit and become a launching pad for active expansion into space. The GPV and ISN Orbit are effective means for the complex and progressive solution of environmental problems on Earth and productive implementation of space direction.
{"title":"General planetary vehicle and industrial space necklace “Orbit” as an alternative to rocket near space exploration","authors":"A. E. Unitsky, S. A. Pronkevich, Sergei V. Artyushevsky, Vitali V. Looksha","doi":"10.22363/2312-8143-2021-22-4-364-372","DOIUrl":"https://doi.org/10.22363/2312-8143-2021-22-4-364-372","url":null,"abstract":"The paper presents an alternative to rockets general planetary vehicle (GPV) and industrial space necklace Orbit (ISN Orbit), which are a single complex necessary for the non-rocket near space exploration. The authors analyzed the conceptual design of the GPV and ISN Orbit, described their main characteristics, compared the impact of the GPV and launch vehicles on the Earthэs ecology. The principle of the GPV movement is based on centrifugal forces arising from the GPV acceleration in the plane of the equator. This is the main difference from rocket engines, which principle of operation is set up on the use of jet motion. The differentiation in the operation principles of the GPV and launch vehicles leads to serious variety in the energy required to lift the GPV to the near-Earth orbit and, accordingly, the variety in cost per payload ton. The concept of the ISN Orbit is described. The complex should serve as a basis for the removal of harmful industry to the near-Earth orbit and become a launching pad for active expansion into space. The GPV and ISN Orbit are effective means for the complex and progressive solution of environmental problems on Earth and productive implementation of space direction.","PeriodicalId":53011,"journal":{"name":"RUDN Journal of Engineering Researches","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41776019","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 : 2021-12-30DOI: 10.22363/2312-8143-2021-22-4-355-363
A. Volodin, Sergey V. Presnov, V. Yakunchikov
The national aspects of readiness and the tasks of introducing autonomous (unmanned) navigation in the near future are considered. The purpose of the study - identification of economic benefits and risks, problem areas of implementation of autonomous navigation technologies. The economic benefit is based on a reduction in the costs of paying the crew of the ship, living on board it, reducing losses from accidents. If the question what? has already been answered - the installation of autonomous navigation systems is available for naval vessels today, then the question why? has not yet been resolved. If the main benefit is expected from a reduction in crew, then a noticeable reduction in crew is possible only for newly built and relatively modern vessels with an auto- mation level of at least AUT2, the share of which under the flag of the Russian Navy is about 15%. At the same time, the modernization of existing inland navigation vessels into autonomous vessels is now available for less than 2% of the river transport fleet (vessels with an automation level of A1), which suggests that autonomous inland water transport only has to be built. The risks also include the slow pace of construction of new ships, as well as retraining and further employment with a massive reduction in the crew of ships. Foreign and domestic experience of the initial stage of autonomous navigation implementation is considered.
{"title":"On the way to autonomous navigation","authors":"A. Volodin, Sergey V. Presnov, V. Yakunchikov","doi":"10.22363/2312-8143-2021-22-4-355-363","DOIUrl":"https://doi.org/10.22363/2312-8143-2021-22-4-355-363","url":null,"abstract":"The national aspects of readiness and the tasks of introducing autonomous (unmanned) navigation in the near future are considered. The purpose of the study - identification of economic benefits and risks, problem areas of implementation of autonomous navigation technologies. The economic benefit is based on a reduction in the costs of paying the crew of the ship, living on board it, reducing losses from accidents. If the question what? has already been answered - the installation of autonomous navigation systems is available for naval vessels today, then the question why? has not yet been resolved. If the main benefit is expected from a reduction in crew, then a noticeable reduction in crew is possible only for newly built and relatively modern vessels with an auto- mation level of at least AUT2, the share of which under the flag of the Russian Navy is about 15%. At the same time, the modernization of existing inland navigation vessels into autonomous vessels is now available for less than 2% of the river transport fleet (vessels with an automation level of A1), which suggests that autonomous inland water transport only has to be built. The risks also include the slow pace of construction of new ships, as well as retraining and further employment with a massive reduction in the crew of ships. Foreign and domestic experience of the initial stage of autonomous navigation implementation is considered.","PeriodicalId":53011,"journal":{"name":"RUDN Journal of Engineering Researches","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45894381","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 : 2021-12-30DOI: 10.22363/2312-8143-2021-22-4-348-354
I. Borisov, S. Reznik
The development of a new design of a leg prosthesis for interaction with inclined surfaces is of interest to provide a new level of comfort for people with disabilities. Based on the analogues and modern works in the prosthetics sphere, tree concepts of the prosthesis design are proposed. Spatial models of surfaces and solid models have been created. To confirm the operability of structures and determine the stress-strain state that occurs when interacting with a surface having a slope of 15 relative to the horizontal plane, the finite element method is used on spatial models of four variants of geometry. A comparative analysis of various variants of the prosthesis design under the same conditions is carried out. The results obtained showed that this design solution is workable, suitable for production and for 14.4% more efficient than standard designs with one slot in the spring element and 44.5% more efficient than designs without slots in the spring elements.
{"title":"Development of a composite structure for biomechanical purposes","authors":"I. Borisov, S. Reznik","doi":"10.22363/2312-8143-2021-22-4-348-354","DOIUrl":"https://doi.org/10.22363/2312-8143-2021-22-4-348-354","url":null,"abstract":"The development of a new design of a leg prosthesis for interaction with inclined surfaces is of interest to provide a new level of comfort for people with disabilities. Based on the analogues and modern works in the prosthetics sphere, tree concepts of the prosthesis design are proposed. Spatial models of surfaces and solid models have been created. To confirm the operability of structures and determine the stress-strain state that occurs when interacting with a surface having a slope of 15 relative to the horizontal plane, the finite element method is used on spatial models of four variants of geometry. A comparative analysis of various variants of the prosthesis design under the same conditions is carried out. The results obtained showed that this design solution is workable, suitable for production and for 14.4% more efficient than standard designs with one slot in the spring element and 44.5% more efficient than designs without slots in the spring elements.","PeriodicalId":53011,"journal":{"name":"RUDN Journal of Engineering Researches","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47697369","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 : 2021-12-30DOI: 10.22363/2312-8143-2021-22-4-339-347
Y. Antipov, I. Shatalova, K. V. Shkarin, M. Lapin, D. Sokolov, Artem O. Grinin, Kirill P. Toptygin
The increase in the cost of fuel and energy resource and the deterioration of the environment from the combustion of traditional fossil fuel, have led to a great interest in energy-saving technology by using secondary energy resources in the thermal energy of industrial, housing and communal services using heat pump units in Russia and abroad. This paper analyzes the well-known two-stage heat pump units, and reveals their advantages in comparison with single-stage. The modeling of a highly efficient multistage vapor compression heat pump unit is proposed. Moreover, a method for calculating a multistage heat pump unit with a high coefficient of performance is presented. In addition, an example of calculating the thermodynamic cycle of a four-stage heat pump unit is presented. The influence of the number of stages on the increase in coefficient of performance in relation to a single-stage heat pump unit, the effect of the temperature difference between the temperature of the high-potential heat source and the temperature of the low-potential heat source on the coefficient of performance were analyzed. In addition, the influence of the initial value of the temperature of the high-potential heat source before heating during the course in the heat pump unit on the value of coefficient of performance for a different number of stages is analyzed under the condition of a constant difference between the heating temperature of the high-potential heat source at the outlet of the heat pump unit and the temperature of the low-potential heat source.
{"title":"Features of modeling a highly efficient multistage vapor compression heat pump unit","authors":"Y. Antipov, I. Shatalova, K. V. Shkarin, M. Lapin, D. Sokolov, Artem O. Grinin, Kirill P. Toptygin","doi":"10.22363/2312-8143-2021-22-4-339-347","DOIUrl":"https://doi.org/10.22363/2312-8143-2021-22-4-339-347","url":null,"abstract":"The increase in the cost of fuel and energy resource and the deterioration of the environment from the combustion of traditional fossil fuel, have led to a great interest in energy-saving technology by using secondary energy resources in the thermal energy of industrial, housing and communal services using heat pump units in Russia and abroad. This paper analyzes the well-known two-stage heat pump units, and reveals their advantages in comparison with single-stage. The modeling of a highly efficient multistage vapor compression heat pump unit is proposed. Moreover, a method for calculating a multistage heat pump unit with a high coefficient of performance is presented. In addition, an example of calculating the thermodynamic cycle of a four-stage heat pump unit is presented. The influence of the number of stages on the increase in coefficient of performance in relation to a single-stage heat pump unit, the effect of the temperature difference between the temperature of the high-potential heat source and the temperature of the low-potential heat source on the coefficient of performance were analyzed. In addition, the influence of the initial value of the temperature of the high-potential heat source before heating during the course in the heat pump unit on the value of coefficient of performance for a different number of stages is analyzed under the condition of a constant difference between the heating temperature of the high-potential heat source at the outlet of the heat pump unit and the temperature of the low-potential heat source.","PeriodicalId":53011,"journal":{"name":"RUDN Journal of Engineering Researches","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47825476","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 : 2021-12-15DOI: 10.22363/2312-8143-2021-22-3-270-282
Natalia L. Malinina
The main aim of the research is to show and prove the necessity of introducing a new, discrete-continuous topological structure to describe complicated systems and processes of their functioning. Currently, there are two topological structures: continuous and discrete. At the same time, there are functional approaches in order to describe complicated systems and processes of their functioning, based on continuous topology. Until now, it has not been possible to build full functionality for the design of complicated technical objects. Therefore, the functional approach does not fully correspond to the increasingly complicated tasks of our time. The introduction of discrete-continuous topology is especially important for the exploring and modeling of complicated systems and processes of their functioning. In order to prove this fact, the present study describes the properties of complicated processes using examples of the flight process and the design process. The examination of these processes, as the most complicated, proves that the complicated systems and processes are topological spaces with metric, so they can be represented in the form of an oriented progressively bounded graph. Also, it proves the topological invariants of complicated systems and the processes of functioning. Presentation of the complicated processes in the form of a directed graph allows getting shorter path to their algorithmicization and programming, which is necessary for existing practice. In addition, the presentation of a complicated process as a directed graph will allow using the apparatus of graph theory for such purpose and will significantly expand the capabilities of programmers.
{"title":"Argumentation of introducing a discrete-continuous topology in the interests of algorithmization of complex functioning processes","authors":"Natalia L. Malinina","doi":"10.22363/2312-8143-2021-22-3-270-282","DOIUrl":"https://doi.org/10.22363/2312-8143-2021-22-3-270-282","url":null,"abstract":"The main aim of the research is to show and prove the necessity of introducing a new, discrete-continuous topological structure to describe complicated systems and processes of their functioning. Currently, there are two topological structures: continuous and discrete. At the same time, there are functional approaches in order to describe complicated systems and processes of their functioning, based on continuous topology. Until now, it has not been possible to build full functionality for the design of complicated technical objects. Therefore, the functional approach does not fully correspond to the increasingly complicated tasks of our time. The introduction of discrete-continuous topology is especially important for the exploring and modeling of complicated systems and processes of their functioning. In order to prove this fact, the present study describes the properties of complicated processes using examples of the flight process and the design process. The examination of these processes, as the most complicated, proves that the complicated systems and processes are topological spaces with metric, so they can be represented in the form of an oriented progressively bounded graph. Also, it proves the topological invariants of complicated systems and the processes of functioning. Presentation of the complicated processes in the form of a directed graph allows getting shorter path to their algorithmicization and programming, which is necessary for existing practice. In addition, the presentation of a complicated process as a directed graph will allow using the apparatus of graph theory for such purpose and will significantly expand the capabilities of programmers.","PeriodicalId":53011,"journal":{"name":"RUDN Journal of Engineering Researches","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46635370","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 : 2021-12-15DOI: 10.22363/2312-8143-2021-22-3-261-269
Sergei Yu. Shmigirilov
The project presents a methodology for choosing the optimal architecture using, as an example, global navigation satellite system, namely its space segment. Several architectures of the GLONASS system were taken as an example for testing the methodology. The usage of traditional methods of multi-criteria analysis in this case is too way difficult due to the presence of a large number of particular navigation tasks, that often put forward contradictory and uncertain requirements for their resolution, the presence of a large number of private criteria, the need to involve a large number of decision makers (DM), and as a consequence, a conflict of interests, difficulty in setting weights, determining preferences, etc. The confident judgment method was used to implement the task. The system of private criteria was structured, taking into account the requirements of specific narrow segments, and their preferences were formed. After that, tables were built for each structure, according to the required number of criteria and for three different particular tasks, as well as to normalize and collapse the criteria for each task into one criterion. Then a set of Pareto-rational solutions and a rating of alternatives were formed. The final appearance of the system satisfied the requirements imposed by the consumer segment. Keyword
{"title":"The methodology of using multicriteria analysis methods choosing the optimal architecture of the GLONASS space segment","authors":"Sergei Yu. Shmigirilov","doi":"10.22363/2312-8143-2021-22-3-261-269","DOIUrl":"https://doi.org/10.22363/2312-8143-2021-22-3-261-269","url":null,"abstract":"The project presents a methodology for choosing the optimal architecture using, as an example, global navigation satellite system, namely its space segment. Several architectures of the GLONASS system were taken as an example for testing the methodology. The usage of traditional methods of multi-criteria analysis in this case is too way difficult due to the presence of a large number of particular navigation tasks, that often put forward contradictory and uncertain requirements for their resolution, the presence of a large number of private criteria, the need to involve a large number of decision makers (DM), and as a consequence, a conflict of interests, difficulty in setting weights, determining preferences, etc. The confident judgment method was used to implement the task. The system of private criteria was structured, taking into account the requirements of specific narrow segments, and their preferences were formed. After that, tables were built for each structure, according to the required number of criteria and for three different particular tasks, as well as to normalize and collapse the criteria for each task into one criterion. Then a set of Pareto-rational solutions and a rating of alternatives were formed. The final appearance of the system satisfied the requirements imposed by the consumer segment. Keyword","PeriodicalId":53011,"journal":{"name":"RUDN Journal of Engineering Researches","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45633368","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 : 2021-12-15DOI: 10.22363/2312-8143-2021-22-3-247-260
Alexander V. Starkova, Andrey A. Emelianov, Lyubov A. Grishantseva, K. I. Zhukovskaya, A. A. Morozov, Alexey A. Trishin
The article focuses on the practical implementation of the proposed methodology for managing target information flows in the Earth remote sensing (ERS) space system. Proposed is the description of architecture and order of application of software-mathematical models of the complex, which implements the previously presented model of the arrangement of target information flows and provides the possibility of determining composition and characteristics of the system, that includes satellite, ground receiving complexes and communication channels there between, generation of scenarios of operation with ERS data, generation of input information flows, calculation of the distribution of target information from various types of ERS satellite by components of the ERS space system, visualization of calculation results and preservation of the obtained results. This makes it possible to optimize the distribution of information processing processes according to customer requests, using both scalar and vector criteria, automate the formation of a plan for the distribution of customer requests processing among system nodes, assess the current state of infrastructure in terms of the capabilities of processing customer requests and identify possible problems in the future.
{"title":"Methodology for managing the flows of target information in the remote sensing space system. Part 3. Application results","authors":"Alexander V. Starkova, Andrey A. Emelianov, Lyubov A. Grishantseva, K. I. Zhukovskaya, A. A. Morozov, Alexey A. Trishin","doi":"10.22363/2312-8143-2021-22-3-247-260","DOIUrl":"https://doi.org/10.22363/2312-8143-2021-22-3-247-260","url":null,"abstract":"The article focuses on the practical implementation of the proposed methodology for managing target information flows in the Earth remote sensing (ERS) space system. Proposed is the description of architecture and order of application of software-mathematical models of the complex, which implements the previously presented model of the arrangement of target information flows and provides the possibility of determining composition and characteristics of the system, that includes satellite, ground receiving complexes and communication channels there between, generation of scenarios of operation with ERS data, generation of input information flows, calculation of the distribution of target information from various types of ERS satellite by components of the ERS space system, visualization of calculation results and preservation of the obtained results. This makes it possible to optimize the distribution of information processing processes according to customer requests, using both scalar and vector criteria, automate the formation of a plan for the distribution of customer requests processing among system nodes, assess the current state of infrastructure in terms of the capabilities of processing customer requests and identify possible problems in the future.","PeriodicalId":53011,"journal":{"name":"RUDN Journal of Engineering Researches","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47702432","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 : 2021-12-15DOI: 10.22363/2312-8143-2021-22-3-293-304
E. Zveryaev
A general method is proposed for the formulation and solution of temperature problems of the theory of elasticity for thin-walled bodies for a given temperature distribution with the preservation of the order of differential equations and the fulfilment of all boundary conditions. The elasticity relations, taking into account temperature deformations, are transformed to a form that allows, in accordance with the Saint-Venant-Picard-Banach method, to perform iterative calculation of all the looking for unknowns of the problem. The procedure for constructing a solution is reduced to replacing four differential equations of the first order of the original system of elasticity theory with four corresponding integral Picard equations with a small factor of relative thinness. Seven unknowns of the original problem calculated by direct integration are expressed in terms of four basic unknowns. The fulfilment of the boundary conditions on the long sides of the strip leads to the solution of four ordinary differential equations for slowly varying and rapidly changing components of the main unknowns. Slowly changing components describe the classical stress-strain state. The rapidly changing ones determine the edge effects at the points of discontinuity of the slowly changing classical solution and the fulfilment of the unsatisfied boundary conditions due to the lowering of the order of the differential equations based on the Kirchhoff hypothesis. In the general case, the solution is represented in the form of asymptotic series in the small parameter of thinness with coefficients in the form of power series in the transverse coordinate. The presentation is illustrated by examples of warping of a free strip and of the occurrence of stresses and displacements of only the edge effect in a strip rigidly clamped at the ends with a linear temperature distribution along the height.
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