Scientific Works of Vinnytsia National Technical University

FUNCTIONAL-VALUE ANALYSIS OF «COMMON RAIL» SYSTEM OF «ЯМЗ-5340» SERIES OF ENGINES

Borysiuk Dmytro; Zelinskyi Viacheslav — Tue, 06 Feb 2024 00:00:00 +0200

In Ukraine for the implementation of the international system of quality ISO 9000 the manufacturer must use the methods of the project solutions analysis. Such analysis must be subjected both input data of the project and output data. Enterprises, creating or developing quality products apply obligatory either typical technologies of functional-value analysis or use their own technologies. Functional-value analysis is directed at the provision of the necessary consumer characteristics of the object with minimum possible expenditures of the resource at all stages of the production process.

The given paper presents functional-value analysis of «Common Rail» system of «ЯМЗ-5340» series of engines. Functional model of «Common Rail» system of «ЯМЗ-5340» series of engines and the classification of the functions of its functional model has been developed.

Classification of the functions of the functional model of «Common Rail» system of «ЯМЗ-5340»series of engines has been presented. Utility coefficient of «Common Rail» system of «ЯМЗ-5340»series of engines has been determined by means of the priorities matrix construction according to the known calculation technique.

Generalizing criterion of the expenditures for the design of the engineering or production systems takes into account the expenditures at all the stages of the system life cycle, for their assessment input matrix of the system «Common Rail» of «ЯМЗ-5340» series of engines has been constructed, cost coefficient is determined from this matrix.

Value graph of the system «Common Rail» functions of the «ЯМЗ-5340»series of engines, ranking diagram of the system functions relatively the utility coefficient, functional-value diagram of the system, diagram of system functions expenses, diagram of the system functions ranking relatively expense ratio, diagram of the values of functional value index of the system, diagram of system functions ranking relatively the index of functional value have been constructed.

According to the constructed diagrams functions of the system «Common Rail» of «ЯМЗ-5340» series of engines which have positive functional-value index and the greatest rating from the considered functions have been determined. Operations or functions, having the greatest functional-value index and rank are the operations the improvement of which leads to further development of the system or achieving the aim of the analysis.

MATHEMATICAL MODEL OF THE PROCESS OF MOTOR VEHICLE “KRAZ” STEERING SYSTEM DIAGNOSTICS

Borysiuk Dmytro; Ognevyi Vitaliyi, Smirnov Evgeniyi, Zelinskyi Viacheslav — Tue, 06 Feb 2024 00:00:00 +0200

Modern motor vehicles can be considered as a dynamic system with a great number of parts, units, assembles. One of the assembles, responsible for the motor vehicle safe motion is steering system. Available methods and means for steering system diagnostics are characterized by low efficiency. For various reasons both declarative and available (supported by the equipment) methods, as a rule, are of low accuracy and are not able to localize the fault. Nowadays, in greater part of cases steering system faults are detected by the external features. It is possible to improve the quality of the steering system diagnostics, also by means of developing new mathematical models of this system operation.

Available methods and means of the steering system diagnostics, as the component of the motor vehicle transport have been analysed. It has been established that the available methods and means of steering system diagnostics do not allow to determine completely its current technical state, thus it is expedient to develop mathematical models of the system units and parts as the object of diagnostics.

Steering system of the motor vehicle “KrAZ” has been taken as the object of diagnostics. Analysis of the peculiarities of the steering system construction of the motor vehicle “KrAZ” as the object of diagnostics has been presented. Replacement of the real technical parts by their idealized models enables to apply various mathematical methods. Mathematical model, which represents the system of functional dependencies between each diagnostic signal and structural parameters has been suggested in general form. Diagnostic matrix is composed for the steering system of the motor vehicle “KrAZ”, it comprises the list of faults and faults features. By means of the developed mathematical model efficient diagnostic procedure of the steering system of the motor vehicle “KrAZ” can be performed. In the process of the mathematical model development it is taken into account that the inverse transformation of the number of faults features into the number of the structural parameters (faults) of the object will be single-valued.

Study of the suggested mathematical model of steering system diagnostics of “KrAZ” motor vehicles will enable to detect the faults of its units and parts depending on their features, that will considerably increase the term of the fault-free operation of both steering system and transport vehicle.

Professor Borys Ivanovych Mokin — 80 years

Tue, 06 Feb 2024 00:00:00 +0200

REGRESSION DEPENDENCE OF THE RESPIRATORY ORGANS DISEASES MORBIDITY RATE ON THE WASTE INCINERATION PLANT EFFICIENCY

Bereziuk Oleh; Vasenko Tetiana , Horbatiuk Svitlana, Shevchuk Tetiana — Tue, 06 Feb 2024 00:00:00 +0200

Flue gases of the waste incineration plants can cause the diseases of the respiratory system, as these gases represent complex multicomponent mixture, comprising 27 ingredients. That is why, determination of the regression dependence of the population total morbidity rate of the respiratory organs diseases on the efficiency of the waste incineration plant, that can be used for the prediction of the morbidity rate, is an important scientific-technical problem.

Objective of the research is the construction by means of the regression analysis the regression dependence of the population total morbidity rate of the respiratory organs diseases on the efficiency of the waste incineration plant, which can be used for the prediction of the morbidity rate of this disease. In the process of the research the method of regression analysis of the results of single-factor experiments and other paired dependences with the selection of the most adequate type of function from the sixteen most common variants by the criterion of maximum value of the correlation coefficient was used.

Regression was carried out on the base of the linearizing transformations, enabling to reduce this dependence to linear one. Determination of the coefficients of the regression equations was performed, applying the methods of the least squares, using the developed computer program "RegAnaliz". Regression dependence of the propagation of the total morbidity rate of the respiratory organs diseases on the efficiency of the waste incineration plant was obtained, this dependence can be used for the prediction of the indices of such disease. Graphic dependence of the propagation of the total morbidity rate of the population on the diseases of the respiratory organs diseases on the efficiency of the incineration plant was constructed, it enables to illustrate this dependence and show the sufficient coincidence of the theoretical results and actual ones. It was established that the propagation of the total morbidity rate of the respiratory organs diseases increases exponentially with the increase of the production efficiency of the incineration plant.

IMPROVEMENT OF THE MATHEMATICAL MODEL OF THE FINE DUST EMISSION IMPACT ON THE CIRCULATORY DISEASES MORBIDITY

Bereziuk Oleh; Grynchak Natalia, Sprut Olga, Bereziuk Violetta — Tue, 06 Feb 2024 00:00:00 +0200

Object of the research in the paper is the circulatory diseases morbidity in Ukraine. World Health Organization (WHO) established that fine dust particles influence more people all over the world than any other pollutants. Air pollution causes the growth of the morbidity rate and mortality rate in the world and is the priority factor of risk for the health of people, in addition, more than 80 % of the diseases depend on the air quality. That is why, the improvement of the mathematical model of the impact of fine dust particles emission on the circulatory diseases morbidity rate, which can be used for the prediction of such morbidity indices is the relevant scientific-engineering problem.

The study of the fine dust particles emission impact on the circulatory diseases morbidity was performed by means of the experiment planning of the second order, applying Box-Wilson method with the help of rotatable central composition design, using the developed software, protected by the Certificate of the State Registration of the Rights to the Copyright Object. Objective of the research is the improvement by means of the multifactor experiment planning the mathematical model of the fine dust particles emissions impact on the circulatory diseases morbidity.

Improved regression dependence of the fine dust particles emission impact on the circulatory diseases morbidity has been obtained. It was established that according to Fishers criterion the hypothesis, regarding the adequacy of the obtained regression model may be considered to be correct with 95 % validity. Correlation coefficient is 0.99865, this proves the sufficient validity of the obtained results. The obtained regression dependence can be used for the prediction of the indices of the circulatory diseases morbidity. Response surfaces of the objective function – number of the cases of circulatory diseases and their 2D cross-sections in the planes of the impact parameters, which enable to represent the obtained dependence and the character of the simultaneous impact of several factors on the objective function have been constructed.

IMPACT OF THE PROXIMITY TO THE LANDFILL OF MUNICIPAL SOLID WASTE ON THE LEVEL OF MICROBIOLOGICAL CONTAMINATION OF THE UNDERGROUND WATERS BY THE TOTAL MICROBIOLOGICAL COUNT (TMC)

Bereziuk Oleh ; Khlestova Svitlana, Klymchuk Iryna , Bereziuk Ludmila — Tue, 06 Feb 2024 00:00:00 +0200

In recent years the total area of municipal solid waste landfills and dumps, including the overloaded, which violate the norms of ecological safety and are the objects of the intensive ecological loading has grown. These landfills may cause the pollution of the environment with microorganisms (colibacilli bacteria, streptococci, staphylococci and ascarids) including bacteriological contamination of the soil and underground waters. Determination of the regression dependence of the level of microbiological contamination of the underground waters according to total microbiological count on the distance to the landfill of municipal solid waste is an important scientific-technical problem. Objective of the research is the determination of the regression dependence of the level of the microbiological contamination of the underground waters according to total microbial count on the distance to the landfill of municipal solid waste. In the process of the investigation the method of the regression analysis of the results of single-factor experiments and other paired dependences with the selection of the rational type of function from the sixteen most widely used options by the criterion of maximum value of the correlation factor was used. Regression was performed on the base of the linearizing transformations, which enable to reduce non-linear dependence to linear one. Determination of the coefficients of the regression equations was carried out, using the methods of the least squares by means of the developed computer program "RegAnaliz", protected by the Certificate of the state registration of the rights to the copyright object. Adequate regression dependence of the level of microbiological contamination of the underground waters, according to the total microbial count of the ground waters on the distance to the landfill of municipal solid waste was obtained, the given regression is used for the determination of the safe distance of MSW landfill location from the sources of the portable water according to the level of microbiological contamination of the ground waters by the total microbic count. Graphic interpretation of the dependence of the microbiological contamination level of the underground waters according to the total microbial count on the distance to the landfill of municipal solid waste has been constructed, it enables to illustrate the dependence and show the coincidence of the theoretical results with actual results on the level of 0.99259. It was established that the safe distance for the location of municipal solid waste landfills from the sources of the portable water according to the level of microbiological contamination of the underground waters by total microbial count is 1387 m.