Pub Date : 2023-02-12DOI: 10.30987/2782-5957-2023-2-12-18
A. Volchenkov, L. Nikitina
The results of differential geometric modeling and laboratory studies of the burn-in of hardened materials for complex sculpted surfaces are presented. The criteria of high-performance burn-in are given. It is shown that for complex sculpted surfaces, the instantaneous wear rate can be considered in terms of the wear rate, which determines the intensity of removing wear particles during the burn-in of the part in accordance with the selected method. Another criterion for the burn-in productivity is the instantaneous wear rate. The obtained dependences allow improving the modes of technological burn-in of part materials according to the criterion of its productivity. Laboratory verification of the obtained modes makes it possible to formulate criteria conditions for highly efficient burn-in of hardened curved surfaces.
{"title":"ALGORITHM FOR DEVELOPING THE PROGRAM OF CURVED SURFACES BURN-IN","authors":"A. Volchenkov, L. Nikitina","doi":"10.30987/2782-5957-2023-2-12-18","DOIUrl":"https://doi.org/10.30987/2782-5957-2023-2-12-18","url":null,"abstract":"The results of differential geometric modeling and laboratory studies of the burn-in of hardened materials for complex sculpted surfaces are presented. The criteria of high-performance burn-in are given. It is shown that for complex sculpted surfaces, the instantaneous wear rate can be considered in terms of the wear rate, which determines the intensity of removing wear particles during the burn-in of the part in accordance with the selected method. Another criterion for the burn-in productivity is the instantaneous wear rate. The obtained dependences allow improving the modes of technological burn-in of part materials according to the criterion of its productivity. Laboratory verification of the obtained modes makes it possible to formulate criteria conditions for highly efficient burn-in of hardened curved surfaces.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"476 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120880713","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 : 2023-02-12DOI: 10.30987/2782-5957-2023-2-47-52
I. Kozhukhov, A. Boldyrev, F. Lozbinev, D. Antipin
The study objective is giving grounds for the application of methods to increase the relative slip of the wheel pair along the rail with its insignificant amount. The main difficulty in using systems based on measuring the absolute or relative slip of the wheel on the rail is a small difference in the value of the speeds and the difficulty of determining the rail horizontal speed. The use of angular acceleration of rotating parts as a diagnostic parameter may also not yield results if the relative slip grows gradually. The novelty of the work is in a detailed analysis of slippage detection devices and evaluation of these approaches. As a result, it is concluded that in practice it makes sense to combine all three mentioned approaches to identify the slippage start on various grounds. To determine the wheel slid on the rail, it makes sense to use all the listed informative signs to reduce the number of false estimates of the slip start.
{"title":"METHODS FOR DETECTING LOCOTIVE SLIPPAGE","authors":"I. Kozhukhov, A. Boldyrev, F. Lozbinev, D. Antipin","doi":"10.30987/2782-5957-2023-2-47-52","DOIUrl":"https://doi.org/10.30987/2782-5957-2023-2-47-52","url":null,"abstract":"The study objective is giving grounds for the application of methods to increase the relative slip of the wheel pair along the rail with its insignificant amount. The main difficulty in using systems based on measuring the absolute or relative slip of the wheel on the rail is a small difference in the value of the speeds and the difficulty of determining the rail horizontal speed. The use of angular acceleration of rotating parts as a diagnostic parameter may also not yield results if the relative slip grows gradually. The novelty of the work is in a detailed analysis of slippage detection devices and evaluation of these approaches. As a result, it is concluded that in practice it makes sense to combine all three mentioned approaches to identify the slippage start on various grounds. To determine the wheel slid on the rail, it makes sense to use all the listed informative signs to reduce the number of false estimates of the slip start.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121542506","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 : 2023-02-12DOI: 10.30987/2782-5957-2023-2-19-26
V. Makarov, Mihail Pesin, Aleksandr Norin
The paper is aimed at improving the productivity, quality and accuracy of manufacturing gas turbine engine parts and assemblies for the modern growing passenger aviation transport based on the use of technical capabilities of modern multiaxis CNC grinding machining centers. The paper shows the results of successful application of a five-axis CNC grinding machining center MFP-050.65.65 made by Magerle (Switzerland), which allows reducing by five times the number of operations, universal machines, special devices and cutting tools by increasing the number of machined surfaces for one set of nozzle blades of an aviation gas turbine engine. Simultaneously with a significant increase in the productivity of machining various multidirectional surfaces of the nozzle blades due to the use of new highly porous grinding wheels and rational modes of deep grinding, a higher burn-free quality of the ground surfaces is ensured and an important task is solved to increase the accuracy of the flow sections of the turbine nozzle apparatus with the combined use of CNC system and special software for correcting errors of part casting surfaces during their installation, turning and deep grinding of the base surfaces. The developed new technology of nozzle blades machining was introduced for the first time in the Russian Federation at the Aviadvigatel enterprise for manufacturing nozzle blades of modern newly produced gas turbine engines.
{"title":"FEATURES OF USING MULTIAXIS CNC GRINDING MACHINES TO IMPROVE MACHINING PERFORMANCE, QUALITY AND ACCURACYOF PARTS AND ASSEMBLIES OF AVIATION GAS TURBINE ENGINES","authors":"V. Makarov, Mihail Pesin, Aleksandr Norin","doi":"10.30987/2782-5957-2023-2-19-26","DOIUrl":"https://doi.org/10.30987/2782-5957-2023-2-19-26","url":null,"abstract":"The paper is aimed at improving the productivity, quality and accuracy of manufacturing gas turbine engine parts and assemblies for the modern growing passenger aviation transport based on the use of technical capabilities of modern multiaxis CNC grinding machining centers. The paper shows the results of successful application of a five-axis CNC grinding machining center MFP-050.65.65 made by Magerle (Switzerland), which allows reducing by five times the number of operations, universal machines, special devices and cutting tools by increasing the number of machined surfaces for one set of nozzle blades of an aviation gas turbine engine. Simultaneously with a significant increase in the productivity of machining various multidirectional surfaces of the nozzle blades due to the use of new highly porous grinding wheels and rational modes of deep grinding, a higher burn-free quality of the ground surfaces is ensured and an important task is solved to increase the accuracy of the flow sections of the turbine nozzle apparatus with the combined use of CNC system and special software for correcting errors of part casting surfaces during their installation, turning and deep grinding of the base surfaces. The developed new technology of nozzle blades machining was introduced for the first time in the Russian Federation at the Aviadvigatel enterprise for manufacturing nozzle blades of modern newly produced gas turbine engines.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131361791","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 : 2023-02-12DOI: 10.30987/2782-5957-2023-2-27-36
Damir Kramsakov, A. Chudinov, A. Kol'ga, Ivan Stolpovskich, V. Aleksandrov
Study objective. Giving grounds to the possibility of making pipeline stop valves with minimal mass and size parameters and maximum operational efficiency. The task to which the paper is devoted. Reduction of mass and size parameters of pipeline stop valves. Research methods. The problems are solved according to the basic methods of hydrostatics (Pascal's law) and hydrodynamics (Bernoulli’s principle). The novelty of the work. It consists in finding the possibility of replacing complex, large-sized and massive elements of pipeline control systems with simple elements operating according to the basic laws of hydraulics. Study results. The studies conducted confirm the possibility to simplify significantly the designs of pipeline stop valves, reducing the mass and size parameters and increasing the efficiency and reliability of pipeline systems. Conclusions. Taking into account the peculiarities of the static and dynamic state of the fluid (liquid, gas), using the laws of hydrostatics and hydrodynamics, it is advisable to divide the entire structure of the pipeline stop valves into two interconnected devise components combined in one case: a device that locks the pipeline (stopping the fluid flow), and a device that opens the pipeline (ensuring the fluid flow). At the same time, one of the devices operates due to high-speed (dynamic) fluid pressure, and the second - due to static pressure.
{"title":"CONSTRUCTION OF PIPELINE STOP VALVES USING THE LAWS OF HYDROSTATICS AND HYDRODYNAMICS","authors":"Damir Kramsakov, A. Chudinov, A. Kol'ga, Ivan Stolpovskich, V. Aleksandrov","doi":"10.30987/2782-5957-2023-2-27-36","DOIUrl":"https://doi.org/10.30987/2782-5957-2023-2-27-36","url":null,"abstract":"Study objective. Giving grounds to the possibility of making pipeline stop valves with minimal mass and size parameters and maximum operational efficiency. \u0000The task to which the paper is devoted. Reduction of mass and size parameters of pipeline stop valves. \u0000Research methods. The problems are solved according to the basic methods of hydrostatics (Pascal's law) and hydrodynamics (Bernoulli’s principle). \u0000The novelty of the work. It consists in finding the possibility of replacing complex, large-sized and massive elements of pipeline control systems with simple elements operating according to the basic laws of hydraulics. \u0000Study results. The studies conducted confirm the possibility to simplify significantly the designs of pipeline stop valves, reducing the mass and size parameters and increasing the efficiency and reliability of pipeline systems. \u0000Conclusions. Taking into account the peculiarities of the static and dynamic state of the fluid (liquid, gas), using the laws of hydrostatics and hydrodynamics, it is advisable to divide the entire structure of the pipeline stop valves into two interconnected devise components combined in one case: a device that locks the pipeline (stopping the fluid flow), and a device that opens the pipeline (ensuring the fluid flow). At the same time, one of the devices operates due to high-speed (dynamic) fluid pressure, and the second - due to static pressure.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126111756","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 : 2023-02-12DOI: 10.30987/2782-5957-2023-2-37-46
S. G. Ismailova
The current state of the issue related to the flow of two-phase (heterogeneous) liquids in hydraulic and water management systems is analysed. The paper objective is to develop hydrodynamic equations of infinitely variable two-phase fluids in accordance with mathematical models taking into account external mass exchange. Based on the problems defined in accordance with the paper objective, the task of building a mathematical model to analyze the turbulent mode of viscous fluid with a continuous flow rate change for hydraulic systems is set.
{"title":"MATHEMATICAL MODELING OF TURBULENT VISCOUS LIQUID MODE WITH CONTINUOUS FLOW RATE CHANGE FOR HYDRAULIC SYSTEMS","authors":"S. G. Ismailova","doi":"10.30987/2782-5957-2023-2-37-46","DOIUrl":"https://doi.org/10.30987/2782-5957-2023-2-37-46","url":null,"abstract":"The current state of the issue related to the flow of two-phase (heterogeneous) liquids in hydraulic and water management systems is analysed. The paper objective is to develop hydrodynamic equations of infinitely variable two-phase fluids in accordance with mathematical models taking into account external mass exchange. Based on the problems defined in accordance with the paper objective, the task of building a mathematical model to analyze the turbulent mode of viscous fluid with a continuous flow rate change for hydraulic systems is set.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116235492","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 : 2023-02-12DOI: 10.30987/2782-5957-2023-2-4-11
E. Fominov, A. Marchenko, Viktoriya Suhomlinova, Oksana Pyatnickaya, D. Gladkih
The study objective: modeling of the temperature distribution along the front surface of the lathe cutter for a given moment of the cutting system evolution. The problem to which the paper is devoted. To evaluate the influence of the geometric parameters of the secondary plastic zone of on the characteristics of the temperature distribution for the front surface of the lathe cutter. Research methods. Geometric parameters of the plastically deformed layer are defined by digital modeling of contact processes by the finite element method. Some initial data for computer modeling and subsequent verification of its results are carried out on the basis of a full-scale experiment with longitudinal turning of a work piece made of stainless steel 12X18H9T with a T15K6 solid-alloy plate. The novelty of the work. Prediction of the temperature on the cutter front surface for a given moment of the cutting system evolution based on a scientific approach of using hydrodynamic analogies to the evaluation of deformation processes in the machined material and combined data of a full-scale and digital experiment. The study results. By means of a digital experiment, the boundaries of the secondary plastic zone in the chip are determined, then a temperature distribution curve is made on the cutter front surface in two variants: for variable and for a constant average thickness of the deformed layer. It is found that the average value of the contact temperature in both cases differs slightly and agrees well with the results of the full-scale experiment. The difference between the maximum temperature values is significant: with a variable layer thickness, the calculated temperature is 11% lower than for the variant with a constant value of this parameter. Conclusions: to calculate the average temperature in the secondary plastic zone, the average value of the deformed layer thickness can be used. In the case of solving problems related to determining the maximum temperature in the cutting zone, it is advisable to take into account the change in the thickness of the plastically deformed layer in the chip along the cutter front surface.
{"title":"MODELING OF THE TEMPERATURE DISTRIBUTION ON THE LATHE FRONT SURFACE TAKING INTO ACCOUNT GEOMETRIC PARAMETERS OF THE SECONDARY PLASTIC ZONE","authors":"E. Fominov, A. Marchenko, Viktoriya Suhomlinova, Oksana Pyatnickaya, D. Gladkih","doi":"10.30987/2782-5957-2023-2-4-11","DOIUrl":"https://doi.org/10.30987/2782-5957-2023-2-4-11","url":null,"abstract":"The study objective: modeling of the temperature distribution along the front surface of the lathe cutter for a given moment of the cutting system evolution. \u0000The problem to which the paper is devoted. To evaluate the influence of the geometric parameters of the secondary plastic zone of on the characteristics of the temperature distribution for the front surface of the lathe cutter. \u0000Research methods. Geometric parameters of the plastically deformed layer are defined by digital modeling of contact processes by the finite element method. Some initial data for computer modeling and subsequent verification of its results are carried out on the basis of a full-scale experiment with longitudinal turning of a work piece made of stainless steel 12X18H9T with a T15K6 solid-alloy plate. \u0000The novelty of the work. Prediction of the temperature on the cutter front surface for a given moment of the cutting system evolution based on a scientific approach of using hydrodynamic analogies to the evaluation of deformation processes in the machined material and combined data of a full-scale and digital experiment. \u0000The study results. By means of a digital experiment, the boundaries of the secondary plastic zone in the chip are determined, then a temperature distribution curve is made on the cutter front surface in two variants: for variable and for a constant average thickness of the deformed layer. It is found that the average value of the contact temperature in both cases differs slightly and agrees well with the results of the full-scale experiment. The difference between the maximum temperature values is significant: with a variable layer thickness, the calculated temperature is 11% lower than for the variant with a constant value of this parameter. \u0000Conclusions: to calculate the average temperature in the secondary plastic zone, the average value of the deformed layer thickness can be used. In the case of solving problems related to determining the maximum temperature in the cutting zone, it is advisable to take into account the change in the thickness of the plastically deformed layer in the chip along the cutter front surface.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127851742","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 : 2023-02-12DOI: 10.30987/2782-5957-2023-2-53-59
V. Sinicyn, Roman Gapchin
The study objective is to develop a method for calculating the extension of the brake cylinder rod of a diesel locomotive. The extension value of the locomotive brake cylinder rod is currently not regulated, while the parameter is subject to control and must be consistent with the gaps between the brake shoe and the tyre. Its calculation involves taking into account the pressure in the cylinder, the cylinder diameter, the gear ratio of the lever transmission, the gaps between the shoe and the tyre, as well as the elastic deformation of the system. Currently, there is no method for determining the latter component, and this does not allow for a grounded choice of the brake cylinder at the design stage. In addition, increased wear of the brake shoes, for example, on a steep long descent, can lead to an insufficient rod extension. It is shown that significant exceedances of standard values are possible in operation. Thus, the extension of the brake cylinder rod of a diesel locomotive is an important parameter affecting traffic safety. The development of its calculation method is relevant. It should be noted, that a significant contribution to the elastic component is made by wear-resistant bushings of lever transmission joints made of sintered iron-based materials. At the same time, the calculation of bushings is the most difficult. A method including the calculation of elastic deformation of levers and rods, as well as wear-resistant bushings by solving the contact problem of radial axis insertion into the wall of the sleeve is chosen as a prototype for the method of calculating the elastic component of the rod extension. This method is refined taking into account the features of the lever transmission. The calculation of the rod extension for the lever transmission of the main diesel locomotive bogie is performed. At the moment, experimental data on the elastic component of the rod extension are obtained for it, and it gives the opportunity to evaluate the calculation results. The calculation of the rod extension showed good compliance with experimental measurements. The method can be used to select the appropriate brake cylinders for the locomotive lever transmission.
{"title":"THE EXTENSION OF THE BRAKE CYLINDER ROD OF DIESEL LOCOMOTIVE LEVER TRANSMISSIONS","authors":"V. Sinicyn, Roman Gapchin","doi":"10.30987/2782-5957-2023-2-53-59","DOIUrl":"https://doi.org/10.30987/2782-5957-2023-2-53-59","url":null,"abstract":"The study objective is to develop a method for calculating the extension of the brake cylinder rod of a diesel locomotive. The extension value of the locomotive brake cylinder rod is currently not regulated, while the parameter is subject to control and must be consistent with the gaps between the brake shoe and the tyre. Its calculation involves taking into account the pressure in the cylinder, the cylinder diameter, the gear ratio of the lever transmission, the gaps between the shoe and the tyre, as well as the elastic deformation of the system. Currently, there is no method for determining the latter component, and this does not allow for a grounded choice of the brake cylinder at the design stage. In addition, increased wear of the brake shoes, for example, on a steep long descent, can lead to an insufficient rod extension. It is shown that significant exceedances of standard values are possible in operation. Thus, the extension of the brake cylinder rod of a diesel locomotive is an important parameter affecting traffic safety. The development of its calculation method is relevant. \u0000It should be noted, that a significant contribution to the elastic component is made by wear-resistant bushings of lever transmission joints made of sintered iron-based materials. At the same time, the calculation of bushings is the most difficult. \u0000A method including the calculation of elastic deformation of levers and rods, as well as wear-resistant bushings by solving the contact problem of radial axis insertion into the wall of the sleeve is chosen as a prototype for the method of calculating the elastic component of the rod extension. This method is refined taking into account the features of the lever transmission. \u0000The calculation of the rod extension for the lever transmission of the main diesel locomotive bogie is performed. At the moment, experimental data on the elastic component of the rod extension are obtained for it, and it gives the opportunity to evaluate the calculation results. The calculation of the rod extension showed good compliance with experimental measurements. The method can be used to select the appropriate brake cylinders for the locomotive lever transmission.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122674473","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 : 2023-01-13DOI: 10.30987/2782-5957-2023-1-35-45
M. Shishkarev, M. Gavrilenko
The study objective is to find out the regularity of attractive force change of the friction surfaces of the adaptive friction clutch in order to ensure a particularly high tear-and-wear accuracy. The task to which the paper is devoted is presentation of various analysis and synthesis stages of the control device of the adaptive friction clutch with positive feedback. Research methods: developed and previously applied elements of the theory of adaptive safety friction clutch with positive feedback and full stabilization of limiting torque allow to make a knowledge base of particular mathematical models that locally describe the process of automatic regulation of the control device. Based on the analysis of the applied method of mathematical modeling, it is found out that it is possible to use synthesized structural and functional diagrams of the control device of positive feedback in clutches in order to ensure high accuracy of their operation. The novelty of the work is that ensuring high stabilization of the limiting torque of the adaptive friction clutch with positive feedback is possible because of the control device structure with a variable ratio value of feedback gain. Study results: the use of the control device with a variable ratio value of feedback gain gives the opportunity to provide particularly high stability of the limiting torque of the adaptive friction clutch. Conclusions: in order to ensure a high stability of the limiting torque of the adaptive friction clutch s with a positive feedback, a special construction of the control device has to be installed in accordance with the dependencies found in its parameters.
{"title":"SYNTHESIS AND ANALYSIS OF THE UPGRADED ADAPTIVE FRICTION CLUTCH WITH POSITIVE FEEDBACK","authors":"M. Shishkarev, M. Gavrilenko","doi":"10.30987/2782-5957-2023-1-35-45","DOIUrl":"https://doi.org/10.30987/2782-5957-2023-1-35-45","url":null,"abstract":"The study objective is to find out the regularity of attractive force change of the friction surfaces of the adaptive friction clutch in order to ensure a particularly high tear-and-wear accuracy. The task to which the paper is devoted is presentation of various analysis and synthesis stages of the control device of the adaptive friction clutch with positive feedback. Research methods: developed and previously applied elements of the theory of adaptive safety friction clutch with positive feedback and full stabilization of limiting torque allow to make a knowledge base of particular mathematical models that locally describe the process of automatic regulation of the control device. Based on the analysis of the applied method of mathematical modeling, it is found out that it is possible to use synthesized structural and functional diagrams of the control device of positive feedback in clutches in order to ensure high accuracy of their operation. The novelty of the work is that ensuring high stabilization of the limiting torque of the adaptive friction clutch with positive feedback is possible because of the control device structure with a variable ratio value of feedback gain. Study results: the use of the control device with a variable ratio value of feedback gain gives the opportunity to provide particularly high stability of the limiting torque of the adaptive friction clutch. Conclusions: in order to ensure a high stability of the limiting torque of the adaptive friction clutch s with a positive feedback, a special construction of the control device has to be installed in accordance with the dependencies found in its parameters.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"299 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129314768","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 : 2023-01-13DOI: 10.30987/2782-5957-2023-1-14-23
A. Rukavitsyn, P'o Vey Chzho Pyo Wei
The study objective is to develop approaches to making a mobile robotic walking-type system that moves based on bionic principles of movements. The developed system is equipped with six limbs and moves typically for some insects, which increases its cross-country capacity in difficult road conditions. The algorithm of the movement arrangement is described and the dynamic analysis of the movement of the executive mechanism links is carried out. A kinematic scheme is made and an algorithm for planning the trajectories of the robot's basis is developed. To implement the modeling, the task of moving the limb of a six-legged robot, presented in the form of a flat two-link mechanism, is considered separately. Based on the given functions, graphs of changes in the basis coordinates and hinge torques, providing the necessary movements of the robot along a given trajectory, are obtained. The direct dynamic problem for one robot leg, which is considered as a system with two degrees of freedom, is solved on the basis of the Lagrange equation. The developed equations are solved in Matlab environment. The torque values of the robot drives necessary for working out a given trajectory are obtained. The novelty of the work is in the development and research of the mechanisms of the walking drive of a mobile robot implementing an algorithm of step-by-step movement, which provides lower energy costs than existing analogues. The results will be useful in making mobile multifunctional robotic systems created on the basis of the insect-type movement, and operating independently in a large number of practical applications.
{"title":"STUDY OF THE DYNAMICS OF BIONIC WALKING ROBOT LIMBS","authors":"A. Rukavitsyn, P'o Vey Chzho Pyo Wei","doi":"10.30987/2782-5957-2023-1-14-23","DOIUrl":"https://doi.org/10.30987/2782-5957-2023-1-14-23","url":null,"abstract":"The study objective is to develop approaches to making a mobile robotic walking-type system that moves based on bionic principles of movements. The developed system is equipped with six limbs and moves typically for some insects, which increases its cross-country capacity in difficult road conditions. The algorithm of the movement arrangement is described and the dynamic analysis of the movement of the executive mechanism links is carried out. A kinematic scheme is made and an algorithm for planning the trajectories of the robot's basis is developed. To implement the modeling, the task of moving the limb of a six-legged robot, presented in the form of a flat two-link mechanism, is considered separately. Based on the given functions, graphs of changes in the basis coordinates and hinge torques, providing the necessary movements of the robot along a given trajectory, are obtained. The direct dynamic problem for one robot leg, which is considered as a system with two degrees of freedom, is solved on the basis of the Lagrange equation. The developed equations are solved in Matlab environment. The torque values of the robot drives necessary for working out a given trajectory are obtained. The novelty of the work is in the development and research of the mechanisms of the walking drive of a mobile robot implementing an algorithm of step-by-step movement, which provides lower energy costs than existing analogues. The results will be useful in making mobile multifunctional robotic systems created on the basis of the insect-type movement, and operating independently in a large number of practical applications.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123781378","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 : 2023-01-13DOI: 10.30987/2782-5957-2023-1-24-34
Dmitry Filkin, Evgeniy Polskiy
The study objective is the development of devices for high-accuracy machining of machine parts. The problem to which the article is devoted is the analysis of the joint influence of location vees on the accuracy of workpiece locating. Research methods: modeling the contact of the workpiece with the location vees using the theory of dimensional connections, regression analysis of modeling results of installing workpieces in the location vees. The novelty of the work: the formation of the workpiece error of locating when it is installed on a device with two location vees and a random distribution of the accuracy parameters of the base surfaces is considered. Study results: a model of self-installation of the workpiece on two location vees is developed and dependences are obtained for estimating the workpiece error of locating, taking into account the normal distribution of accuracy parameter values within their tolerances. Conclusions: taking into account the probability of distribution of the values of base surface accuracy parameters within the tolerances reduces the values of the workpiece error of locating, which makes it possible to reduce the requirements for the accuracy of the devices reasonably.
{"title":"ANALYSIS OF THE WORKPIECE ERROR OF LOCATING WHEN INSTALLED ON TWO LOCATION VEES, TAKING INTO ACCOUNT THE ERROR OF SHAPE AND LOCATION","authors":"Dmitry Filkin, Evgeniy Polskiy","doi":"10.30987/2782-5957-2023-1-24-34","DOIUrl":"https://doi.org/10.30987/2782-5957-2023-1-24-34","url":null,"abstract":"The study objective is the development of devices for high-accuracy machining of machine parts. The problem to which the article is devoted is the analysis of the joint influence of location vees on the accuracy of workpiece locating. Research methods: modeling the contact of the workpiece with the location vees using the theory of dimensional connections, regression analysis of modeling results of installing workpieces in the location vees. The novelty of the work: the formation of the workpiece error of locating when it is installed on a device with two location vees and a random distribution of the accuracy parameters of the base surfaces is considered. Study results: a model of self-installation of the workpiece on two location vees is developed and dependences are obtained for estimating the workpiece error of locating, taking into account the normal distribution of accuracy parameter values within their tolerances. Conclusions: taking into account the probability of distribution of the values of base surface accuracy parameters within the tolerances reduces the values of the workpiece error of locating, which makes it possible to reduce the requirements for the accuracy of the devices reasonably.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121079282","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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