Pub Date : 2019-11-01DOI: 10.2991/aviaent-19.2019.35
S. Dyadya, Ye. B Kozlova, A. Germashev, A. Leschenko, E. Kondratyuk
The profile of the machined surface at the peripheral end milling is made when various types of fluctuations occur. At milling under self-exited oscillations, the machined surface, in addition to traces from cutting in with each tooth, has a wavy profile. The purpose of the article is to consider the peculiarities of the mechanism for making the profile of the machined surface under up and down peripheral end milling in case of chatter appearance. The experiments have been carried out on a special bench, using a technique that allows estimating the law of the vibrational motion of a part in the milling process by recording oscillograms of part fluctuation. The profile of the machined surface was evaluated by strip chart recording. The basic fragments of the oscillograms were used to determine the values of the parameters, which made it possible to establish the relationship between the waviness on the machined surface and the oscillatory movements of the part during milling with different feed directions. On the basis of the conducted experimental research, the mechanisms of surface finish formation during the up and down peripheral end milling in the third velocity zone have been determined. The height of the waviness during the cut-up milling with self-exited oscillations is formed by cavities, the depth of which is determined by the deviation of the part from the elastic equilibrium line on the first wave of auto-oscillations. The number of cuts determines the waviness stroke. At the cut-down milling, shaping cavities are formed by the part deviation from the elastic equilibrium line when the tool leaves the cutting zone. The waviness stroke on the machined surface depends on the change in the length of the cutting surface. Keywords—profile; number of cuts; oscillogram; the vibrational motion, waviness; profilogram
{"title":"Features of Peripheral End milling: Formation of Machined Surface Profile","authors":"S. Dyadya, Ye. B Kozlova, A. Germashev, A. Leschenko, E. Kondratyuk","doi":"10.2991/aviaent-19.2019.35","DOIUrl":"https://doi.org/10.2991/aviaent-19.2019.35","url":null,"abstract":"The profile of the machined surface at the peripheral end milling is made when various types of fluctuations occur. At milling under self-exited oscillations, the machined surface, in addition to traces from cutting in with each tooth, has a wavy profile. The purpose of the article is to consider the peculiarities of the mechanism for making the profile of the machined surface under up and down peripheral end milling in case of chatter appearance. The experiments have been carried out on a special bench, using a technique that allows estimating the law of the vibrational motion of a part in the milling process by recording oscillograms of part fluctuation. The profile of the machined surface was evaluated by strip chart recording. The basic fragments of the oscillograms were used to determine the values of the parameters, which made it possible to establish the relationship between the waviness on the machined surface and the oscillatory movements of the part during milling with different feed directions. On the basis of the conducted experimental research, the mechanisms of surface finish formation during the up and down peripheral end milling in the third velocity zone have been determined. The height of the waviness during the cut-up milling with self-exited oscillations is formed by cavities, the depth of which is determined by the deviation of the part from the elastic equilibrium line on the first wave of auto-oscillations. The number of cuts determines the waviness stroke. At the cut-down milling, shaping cavities are formed by the part deviation from the elastic equilibrium line when the tool leaves the cutting zone. The waviness stroke on the machined surface depends on the change in the length of the cutting surface. Keywords—profile; number of cuts; oscillogram; the vibrational motion, waviness; profilogram","PeriodicalId":158920,"journal":{"name":"Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116059850","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 : 2019-11-01DOI: 10.2991/aviaent-19.2019.5
V. Bludov, A. Rasputina, A. Govorkov, A. D. Kolosov, A. Suhanov
—This paper presents a simulation of the temperature distribution on the surface of a heat exchanger in the ANSYS application package. In the R&D part devoted to the development of a device for converting heat into electrical energy, models of an experimental heat exchanger have been created, including numerical models for calculating three-dimensional distributions of the gas flow velocity, temperature fields, flow turbulence intensity and static pressure. An initial assessment of the parameters of the heat exchanger was carried out and the following predicted indicators were established at the flow rate and temperature of the inlet gases corresponding to data of the technical specifications. A combined analysis of the simulation results allows us to determine the zones for the most efficient installation of thermoelectric converters in electric energy: elements of the thermoelectric converter on the side surfaces of the cone. A prototype of the thermoelectric converter was developed and manufactured in the work, studies of thermoelectric conversion were conducted. The work also carried out the initial assessment of the state after the launch of prototypes of high-ampere electrolyzers of the RA-550 experimental section, namely, the measurement of the material balance of emissions through the housing lantern (outlet) and supply ventilation (inlet). All tasks of the stage have been fully resolved, the goals set and achieved, the results of the planned work received.
{"title":"Modeling the Distribution of Temperatures on the Surface of a Heat Exchanger","authors":"V. Bludov, A. Rasputina, A. Govorkov, A. D. Kolosov, A. Suhanov","doi":"10.2991/aviaent-19.2019.5","DOIUrl":"https://doi.org/10.2991/aviaent-19.2019.5","url":null,"abstract":"—This paper presents a simulation of the temperature distribution on the surface of a heat exchanger in the ANSYS application package. In the R&D part devoted to the development of a device for converting heat into electrical energy, models of an experimental heat exchanger have been created, including numerical models for calculating three-dimensional distributions of the gas flow velocity, temperature fields, flow turbulence intensity and static pressure. An initial assessment of the parameters of the heat exchanger was carried out and the following predicted indicators were established at the flow rate and temperature of the inlet gases corresponding to data of the technical specifications. A combined analysis of the simulation results allows us to determine the zones for the most efficient installation of thermoelectric converters in electric energy: elements of the thermoelectric converter on the side surfaces of the cone. A prototype of the thermoelectric converter was developed and manufactured in the work, studies of thermoelectric conversion were conducted. The work also carried out the initial assessment of the state after the launch of prototypes of high-ampere electrolyzers of the RA-550 experimental section, namely, the measurement of the material balance of emissions through the housing lantern (outlet) and supply ventilation (inlet). All tasks of the stage have been fully resolved, the goals set and achieved, the results of the planned work received.","PeriodicalId":158920,"journal":{"name":"Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122602180","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 : 2019-11-01DOI: 10.2991/aviaent-19.2019.76
V. Zedgenizov, D. V. Kokourov, D. Biryukov
Abstrakt – The purpose of the article is to develop a mathematical model of the power regulator using an A11VO axial-piston pump (Bosch Rexroth) as an example and determine the effect of pressure on the control process parameters. A mathematical model of the regulator was developed; a scheme for its solution in the Matlab-Simulink environment was suggested; dependencies of the spool movement (x1), piston (x2), transition time (t) and other parameters on the pressure in the pressure line (p) have been determined. The mathematical model of the regulator establishes the effect of pressure on control process parameters. When the pressure increases from 30 to 45 MPa, the regulator spool moves at a distance varying from 0.4 2.8 mm. The spool movement is proportional to the pressure. The piston movement is more sensitive to the change in pressure. It changes within the range of 3–19 mm, while the relationship is non-linear. The cylidner pressure and the ratio of rocker arms are proportional to the pressure and increase 1.5 times; the transition time of is expressed by a non-linear dependence and decreases two-fold.
{"title":"Mathematical Modelling of the Power Regulator by the Example of an A11VO Axial Piston Pump (Bosch Rexroth)","authors":"V. Zedgenizov, D. V. Kokourov, D. Biryukov","doi":"10.2991/aviaent-19.2019.76","DOIUrl":"https://doi.org/10.2991/aviaent-19.2019.76","url":null,"abstract":"Abstrakt – The purpose of the article is to develop a mathematical model of the power regulator using an A11VO axial-piston pump (Bosch Rexroth) as an example and determine the effect of pressure on the control process parameters. A mathematical model of the regulator was developed; a scheme for its solution in the Matlab-Simulink environment was suggested; dependencies of the spool movement (x1), piston (x2), transition time (t) and other parameters on the pressure in the pressure line (p) have been determined. The mathematical model of the regulator establishes the effect of pressure on control process parameters. When the pressure increases from 30 to 45 MPa, the regulator spool moves at a distance varying from 0.4 2.8 mm. The spool movement is proportional to the pressure. The piston movement is more sensitive to the change in pressure. It changes within the range of 3–19 mm, while the relationship is non-linear. The cylidner pressure and the ratio of rocker arms are proportional to the pressure and increase 1.5 times; the transition time of is expressed by a non-linear dependence and decreases two-fold.","PeriodicalId":158920,"journal":{"name":"Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124294187","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 : 2019-11-01DOI: 10.2991/aviaent-19.2019.50
A. Paliakou, V. P. Kulikau, А.А. Stsiapanau
The paper deals with the possibility of obtaining strong overlap projection welds due to formation of a common annular zone instead of a coin-shaped one as a nugget. A method for reducing the energy intensity of this process by reducing the time of current supply recommended in the literature was identified.
{"title":"Resistance Projection Welding of Sheet Metal Without Formation of a Mutual Melting Zone in The Form of a Cast Nugget","authors":"A. Paliakou, V. P. Kulikau, А.А. Stsiapanau","doi":"10.2991/aviaent-19.2019.50","DOIUrl":"https://doi.org/10.2991/aviaent-19.2019.50","url":null,"abstract":"The paper deals with the possibility of obtaining strong overlap projection welds due to formation of a common annular zone instead of a coin-shaped one as a nugget. A method for reducing the energy intensity of this process by reducing the time of current supply recommended in the literature was identified.","PeriodicalId":158920,"journal":{"name":"Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133143077","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 : 2019-11-01DOI: 10.2991/aviaent-19.2019.39
A. Kutin, A. Shayhulova, S. Ivashin
The article presents a new method for technical preparation of production in digital technology application. This method reduces risks of project, which goes over costs and deadlines. The main achievement is implementing the concept of using CALS-technologies in production technical preparation (PTP). We considered a method combining different mathematical and computer modeling approaches in order to present the best long-term strategy of production management.
{"title":"Cascade Method for Technical Preparation of Production in Digital Technology Application","authors":"A. Kutin, A. Shayhulova, S. Ivashin","doi":"10.2991/aviaent-19.2019.39","DOIUrl":"https://doi.org/10.2991/aviaent-19.2019.39","url":null,"abstract":"The article presents a new method for technical preparation of production in digital technology application. This method reduces risks of project, which goes over costs and deadlines. The main achievement is implementing the concept of using CALS-technologies in production technical preparation (PTP). We considered a method combining different mathematical and computer modeling approaches in order to present the best long-term strategy of production management.","PeriodicalId":158920,"journal":{"name":"Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133213197","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 : 2019-11-01DOI: 10.2991/aviaent-19.2019.13
V. V. Varakin, E. O. Chebakova
Mathematical apparatus for calculating the road transport operation volume, existing in the modern theory, corresponds to the only technology of the transport process – functioning of the pendulum route with reverse unloaded mileage. However, modern specifics of freight motor transport enterprises functioning today is, as a rule, a frequent change of the clientele, types of freights and their volumes, distances of transportations, quantity and type of the rolling stock, average sizes of the technical and operational indicators, road congestion, number of drivers, condition of technological infrastructure and material and technical service opportunities. In this regard, studies have been carried out and the results aimed at making informed management decisions and accurate calculation of the planned need for vehicles have been presented. In the course of the research the methods of linear programming; professionallogical approach using the apparatus of mathematical modeling, including algorithm and software implementation of models were used. The analysis of the results of the previously developed methods and models application in the practice of planning the freight motor transport enterprises operation is carried out. It is revealed that the previously developed mathematical models are not implemented as there are significant discrepancy between the planned values and the results of motor transport enterprises work. Keywords—rolling stock; motor transport enterprises; management; planning; technical and operational indicators
{"title":"Influence of Technical and Operational Indicators on the Results of Planning Motor Transport Operation","authors":"V. V. Varakin, E. O. Chebakova","doi":"10.2991/aviaent-19.2019.13","DOIUrl":"https://doi.org/10.2991/aviaent-19.2019.13","url":null,"abstract":"Mathematical apparatus for calculating the road transport operation volume, existing in the modern theory, corresponds to the only technology of the transport process – functioning of the pendulum route with reverse unloaded mileage. However, modern specifics of freight motor transport enterprises functioning today is, as a rule, a frequent change of the clientele, types of freights and their volumes, distances of transportations, quantity and type of the rolling stock, average sizes of the technical and operational indicators, road congestion, number of drivers, condition of technological infrastructure and material and technical service opportunities. In this regard, studies have been carried out and the results aimed at making informed management decisions and accurate calculation of the planned need for vehicles have been presented. In the course of the research the methods of linear programming; professionallogical approach using the apparatus of mathematical modeling, including algorithm and software implementation of models were used. The analysis of the results of the previously developed methods and models application in the practice of planning the freight motor transport enterprises operation is carried out. It is revealed that the previously developed mathematical models are not implemented as there are significant discrepancy between the planned values and the results of motor transport enterprises work. Keywords—rolling stock; motor transport enterprises; management; planning; technical and operational indicators","PeriodicalId":158920,"journal":{"name":"Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115569105","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 : 2019-11-01DOI: 10.2991/aviaent-19.2019.55
M. Sharov
The article is devoted to the issues of the transportation demand estimation. Existing methods to bring up to date the Origin-Destination matrix are reviewed. A regression method to update the passenger Origin-Destination matrix is proposed. The proposed method is compared with the method of calculating the Origin-Destination matrix using the population mobility data. The comparability of the proposed method with the standard method of calculating the Origin-Destination matrix is established. The characteristics of the transport mobility of Irkutsk city population are also established. The relevance of the research topic is determined by the growth of the level of vehicleto-population ratio and transport mobility of our country population that complicates the process of designing and managing urban passenger transport systems (UPT). One of the urgent objectives is the development of efficient methods to estimate the demand for transportation services, including ones to determine the distribution of this demand between UPT and individual road transport. Constantly updated information on transportation demand improves the efficiency of the management of the UPT system and improves the quality of transportation services provided to the population.
{"title":"Improving Methods of Estimation of Transport Demand for Urban Passenger Transportation","authors":"M. Sharov","doi":"10.2991/aviaent-19.2019.55","DOIUrl":"https://doi.org/10.2991/aviaent-19.2019.55","url":null,"abstract":"The article is devoted to the issues of the transportation demand estimation. Existing methods to bring up to date the Origin-Destination matrix are reviewed. A regression method to update the passenger Origin-Destination matrix is proposed. The proposed method is compared with the method of calculating the Origin-Destination matrix using the population mobility data. The comparability of the proposed method with the standard method of calculating the Origin-Destination matrix is established. The characteristics of the transport mobility of Irkutsk city population are also established. The relevance of the research topic is determined by the growth of the level of vehicleto-population ratio and transport mobility of our country population that complicates the process of designing and managing urban passenger transport systems (UPT). One of the urgent objectives is the development of efficient methods to estimate the demand for transportation services, including ones to determine the distribution of this demand between UPT and individual road transport. Constantly updated information on transportation demand improves the efficiency of the management of the UPT system and improves the quality of transportation services provided to the population.","PeriodicalId":158920,"journal":{"name":"Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121853608","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 : 2019-11-01DOI: 10.2991/aviaent-19.2019.23
A. Bashkirov, V. Glotov, N. Astakhov, A. A. Pirogov, I. Sviridova, T. Glotova
— An integral element of most radio devices is systems of frequency and signal synthesis. Most of the known circuits use analog elements, which are characterized by the change of parameters under the influence of external factors. However, with the development of digital technology that uses only mathematical calculations and logical functions resistant to changes in external factors, a new method of generating signals was developed, which is called a direct digital synthesis. One of the main types of frequency synthesizers are direct digital synthesizers (DDS). High frequency and phase resolution, the fastest possible transition to another frequency without phase discontinuity, the ability to control the frequency, phase and amplitude through the digital interface are constantly expanding the DDS implementation area in various fields of technology, such as satellite communication, radar-location, radio navigation, measuring equipment, etc. A direct digital synthesis is a method of generating a signal of the desired frequency and waveform using digital resources. Owing to the digital solution, the generated signal has the accuracy inherent in digital systems. The frequency, amplitude and phase of the signal at any given time are known and controlled. With these advantages, direct digital synthesis is increasingly replacing analog solutions. The relevance of the study stems from the lack of domestic equivalents of frequency synthesizer chips, the implementation on the modern element base. The article describes a method for designing a direct digital synthesizer (DDS) with a quarter-wave transformer (QWT) based on FPGA.
{"title":"Design of direct digital synthesizers signal generator","authors":"A. Bashkirov, V. Glotov, N. Astakhov, A. A. Pirogov, I. Sviridova, T. Glotova","doi":"10.2991/aviaent-19.2019.23","DOIUrl":"https://doi.org/10.2991/aviaent-19.2019.23","url":null,"abstract":"— An integral element of most radio devices is systems of frequency and signal synthesis. Most of the known circuits use analog elements, which are characterized by the change of parameters under the influence of external factors. However, with the development of digital technology that uses only mathematical calculations and logical functions resistant to changes in external factors, a new method of generating signals was developed, which is called a direct digital synthesis. One of the main types of frequency synthesizers are direct digital synthesizers (DDS). High frequency and phase resolution, the fastest possible transition to another frequency without phase discontinuity, the ability to control the frequency, phase and amplitude through the digital interface are constantly expanding the DDS implementation area in various fields of technology, such as satellite communication, radar-location, radio navigation, measuring equipment, etc. A direct digital synthesis is a method of generating a signal of the desired frequency and waveform using digital resources. Owing to the digital solution, the generated signal has the accuracy inherent in digital systems. The frequency, amplitude and phase of the signal at any given time are known and controlled. With these advantages, direct digital synthesis is increasingly replacing analog solutions. The relevance of the study stems from the lack of domestic equivalents of frequency synthesizer chips, the implementation on the modern element base. The article describes a method for designing a direct digital synthesizer (DDS) with a quarter-wave transformer (QWT) based on FPGA.","PeriodicalId":158920,"journal":{"name":"Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)","volume":"202 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130370607","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 : 2019-11-01DOI: 10.2991/aviaent-19.2019.2
A. Artyunin, O. Sumenkov
— The process of automatic balancing of an unbalanced rotor was simulated using four pendulums mounted in pairs on the shaft on both sides of the rotor. The rotor is rigidly fixed in the housing, which is mounted on elastic supports. Studies have shown that the pendulums partially or fully compensate the unbalance of the rotor within the range of its rotational frequencies. By selecting the stiffness characteristics of the housing supports and mass-and-inertia parameters of the housing, the rotor becomes a zone of stable operation of the auto-balancing device. It has been established that the degree of compensation for the rotor unbalance by pendulums of equal mass and length essentially depends on the relative position of the center of rotor masses, the center of the housing masses and the center of rigidity of the elastic supports of the housing and the distance between the pendulums in one pair.
{"title":"Simulation of the Automatic Balancing Process of A Rotor, Rigidly Fixed in the Housing on Elastic Supports","authors":"A. Artyunin, O. Sumenkov","doi":"10.2991/aviaent-19.2019.2","DOIUrl":"https://doi.org/10.2991/aviaent-19.2019.2","url":null,"abstract":"— The process of automatic balancing of an unbalanced rotor was simulated using four pendulums mounted in pairs on the shaft on both sides of the rotor. The rotor is rigidly fixed in the housing, which is mounted on elastic supports. Studies have shown that the pendulums partially or fully compensate the unbalance of the rotor within the range of its rotational frequencies. By selecting the stiffness characteristics of the housing supports and mass-and-inertia parameters of the housing, the rotor becomes a zone of stable operation of the auto-balancing device. It has been established that the degree of compensation for the rotor unbalance by pendulums of equal mass and length essentially depends on the relative position of the center of rotor masses, the center of the housing masses and the center of rigidity of the elastic supports of the housing and the distance between the pendulums in one pair.","PeriodicalId":158920,"journal":{"name":"Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116271377","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 : 2019-11-01DOI: 10.2991/aviaent-19.2019.43
А. Litvinov, I. Senin, T. Konovalova
The article deals with issues related to the impact of road safety on sustainable urban development. We analyzed the territory of the city in order to change the functional purpose of the territories, construction sites, changes in population. A comparison was made of road accidents with transport-townplanning deficiencies and their impact on traffic safety.
{"title":"Road Safety as a Factor in Sustainable Urban Development","authors":"А. Litvinov, I. Senin, T. Konovalova","doi":"10.2991/aviaent-19.2019.43","DOIUrl":"https://doi.org/10.2991/aviaent-19.2019.43","url":null,"abstract":"The article deals with issues related to the impact of road safety on sustainable urban development. We analyzed the territory of the city in order to change the functional purpose of the territories, construction sites, changes in population. A comparison was made of road accidents with transport-townplanning deficiencies and their impact on traffic safety.","PeriodicalId":158920,"journal":{"name":"Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126111649","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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