Visnik Cherkas''kogo derzhavnogo tekhnologichnogo universitetu最新文献

{"title":"ПЛОСКА ДЕФОРМАЦІЯ П’ЄЗОЕЛЕКТРИЧНОГО БІМАТЕРІАЛУ З ДВОМА ЕЛЕКТРОПРОВІДНИМИ ЕЛЕКТРИЧНО ЗАРЯДЖЕНИМИ МІЖФАЗНИМИ ТРІЩИНАМИ","authors":"Микита Костенко, Алла Шевельова, Ірина Гергель, Володимир Лобода","doi":"10.24025/2306-4412.2.2023.278565","DOIUrl":"https://doi.org/10.24025/2306-4412.2.2023.278565","url":null,"abstract":"В роботі розглянуто п’єзоелектричний композит, сформований із двох різнорідних п’єзоелектричних півплощин. Вважається, що на межі поділу матеріалів виникли дві електропровідні тріщини, які можуть мати довільну довжину і відстань між їх вершинами. Допускається також наявність електричного заряду на одній або обох тріщинах. Використано представлення електричних та механічних факторів через кусково-аналітичні функції. З їх використанням проблема зведена до задачі лінійного спряження, для якої представлений точний аналітичний розв’язок. Отримано вирази для механічних та електричних компонент на берегах тріщин та на частинах інтерфейсу поза тріщинами. Побудовано графіки залежності напружень та розкриття тріщин від довжини тріщин та їх сумарного заряду. Показано, що вплив сумарного електричного заряду на тріщині на її розкриття є більш суттєвим, ніж цей вплив на напруження.","PeriodicalId":34054,"journal":{"name":"Visnik Cherkas''kogo derzhavnogo tekhnologichnogo universitetu","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136040758","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}

{"title":"ЗАЛЕЖНІСТЬ ЧАСТОТИ КОЛИВАНЬ ВІД ГЕОМЕТРИЧНИХ ПАРАМЕТРІВ П’ЄЗОКЕРАМІЧНОГО АКТУАТОРА ДЛЯ МАЛОГАБАРИТНИХ ЛІТАЛЬНИХ АПАРАТІВ","authors":"Юлія Юрівна Бондаренко, Сергій Олександрович Філімонов, Андрій Олександрович Мисан, Дмитро Сергійович Бачеріков","doi":"10.24025/2306-4412.2.2019.169493","DOIUrl":"https://doi.org/10.24025/2306-4412.2.2019.169493","url":null,"abstract":"In the article the attention is paid to the peculiarities of the construction of small-sized aircraft flying into the air with the help of wings based on the bionic principle – copying movements birds or insects. Micro devices of such size and type have a wide range of applications and a number of tasks set before them, such as: pollination of crops, search and rescue operations, observation, as well as monitoring of weather, climate and environment with high resolution. The work has found its application in the design of small-sized aircraft, where piezoceramic plates are used as a driving force. The piezoceramics becomes much more relevant than that of an electric motor, since with the reduced design of a small-sized flying machine built on the basis of an electric motor, it will have to reduce the electromagnetic engine itself, that will lead to a loss in the efficiency factor of the engine and the aircraft in general. The piezoceramic engine is capable of converting electric energy into a mechanical one with a very high operating coefficient, which in some cases amounts to more than ninety percents. In addition, the use of piezoactuators has a number of advantages: operating speed, the development of large forces, the absence of a magnetic field, low energy consumption, no tendency to wear, the ability to work in extreme conditions. When constructing small-sized devices based on piezoceramics, the ratio of the length and width of the piezoceramic plate to its resonant frequency is extremely important. As a result of the research, mathematical dependences have been obtained for predicting the oscillation frequency, depending on geometric dimensions of the piezoelectric plate. The adequacy of the obtained numerical calculations is confirmed by experimental studies.","PeriodicalId":34054,"journal":{"name":"Visnik Cherkas''kogo derzhavnogo tekhnologichnogo universitetu","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68825169","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}

{"title":"МЕТОДИ ЦІННІСНО-ОРІЄНТОВАНОГО УПРАВЛІННЯ АРТ-ПРОЕКТАМИ","authors":"Дмитро Віталійович Бас","doi":"10.24025/2306-4412.2.2019.169926","DOIUrl":"https://doi.org/10.24025/2306-4412.2.2019.169926","url":null,"abstract":"Today, in the world and in Ukraine, the methodology of project management and the methodology of value-oriented project management are being rapidly implemented, in particular, the stakeholder management component is being developed. After the results of the analysis of scientists’ publications, the author has concluded that the interested parties of any project, in particular, an art project, can both improve the result of the project and completely discredit it, thereby completing the project without achieving the goal. Therefore, in existing project management methodologies, special attention is paid to identifying, analyzing, monitoring and managing stakeholders, as well as determining the value of a project product for each of them. The purpose of the article is to develop methods of value-oriented management of art projects, which provide an opportunity to identify the stakeholders of the art project and assess the value of the art product, to increase the satisfaction of the needs of all stakeholders of the art project. The article analyzes the stage of identifying the stakeholders of an art project in accordance with the existing mechanisms of the interaction between the company and its stakeholders. The author has offered to improve these mechanisms by assessing the values of each stakeholder and taking into account the impact of risks from their activities or inactivity. The method of managing the value of the art project, which allows to develop strategies to manage the value of stakeholders and risks that may arise in the course of their activities, is proposed. The application of techniques of value-oriented art project management will help the art project manager and his team to identify the art project stakeholders and assess the value of the art product, taking into account the needs of each interested party of the art project in order to increase their satisfaction with the art project product.","PeriodicalId":34054,"journal":{"name":"Visnik Cherkas''kogo derzhavnogo tekhnologichnogo universitetu","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68825294","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}

{"title":"ПОДАЛЬШИЙ РОЗВИТОК МОДЕЛЕЙ І МЕТОДІВ ПРОЕКТНОГО МЕНЕДЖМЕНТУ ДЛЯ ЦІННІСНО-ОРІЄНТОВАНОГО УПРАВЛІННЯ ПРОЕКТАМИ РЕІНЖИНІРИНГУ БУДІВЕЛЬНИХ КОМПАНІЙ","authors":"Сергій Дмитрович Бушуєв, Андрій Вікторович Пузійчук","doi":"10.24025/2306-4412.2.2019.171471","DOIUrl":"https://doi.org/10.24025/2306-4412.2.2019.171471","url":null,"abstract":"Construction industry becomes very important for economic development. The importance of reengineering projects for ensuring the competitiveness of construction companies is determined. The analysis of literary sources according to three directions – standards and research in the field of project and program management; value approach; projects of management processes reengineering – is made. The triad approach \"project-value-reengineering\" is offered. The directions for the development of each of the elements of the \"project-value-reengineering\" approach for construction companies are highlighted. In the first element, this is integration through Agile, in the second one it is a life cycle of values, in the third one – petal reengineering. The steps of the \"petal reengineering\" method are proposed, SWOT-analysis of the method has been carried out. The conclusion concerning the increase of the flexibility of the system of construction companies management by introducing the method of \"petal reengineering\" is made. Prospects for further research in the chosen direction are outlined. Based on Japanese standard P2M, the structure of values includes asset values, values of innovation, ownership values for stakeholders, and intellectual property values. Taking into account the specifics of construction companies, further studies can include categorization of values of construction companies, creation of a classification system for such values, development of the method of choosing the priority values for a construction company in terms of the system of management and technological processes, categorization of the list of values selected by the previous method, in order to identify subprojects of the reengineering project, definition of target dynamics of values by the results of reengineering, which would include balancing of future interests of interested parties, formulation of mission, goals and objectives of the project of construction company reengineering.","PeriodicalId":34054,"journal":{"name":"Visnik Cherkas''kogo derzhavnogo tekhnologichnogo universitetu","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68825371","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}

{"title":"ВІРТУАЛЬНИЙ ІНСТРУМЕНТАРІЙ ДЛЯ ДОСЛІДЖЕННЯ ХВИЛЕВОДУ ПРЯМОКУТНОГО ПЕРЕТИНУ","authors":"Олександр Степанович Гавриш, Сергій Іванович Костюк, Юрій Юрійович Обруч, Марія Багрій","doi":"10.24025/2306-4412.2.2019.173693","DOIUrl":"https://doi.org/10.24025/2306-4412.2.2019.173693","url":null,"abstract":"У роботі синтезовано віртуальний стенд у середовищі LabView, який дає можливість провести імітаційне моделювання для визначення параметрів електромагнітної хвилі в прямокутному хвилеводі. Для хвилі заданого типу з довільним сполученням індексів m і n, що поширюється по хвилеводу з заданими геометричними розмірами поперечного перетину, можна визначати критичну довжину хвилі або критичну частоту. Також розроблений віртуальний інструментарій дає змогу досліджувати дисперсію в хвилеводі, оцінювати величину втрат у хвилеводі та коефіцієнт корисної дії, визначати окремо для хвиль Е і Н типів характеристичний опір хвилеводу і коефіцієнт відбиття. Отримано аналітичні вирази для розрахунку пробивної потужності хвилеводу при поширенні хвиль Е і Н типів, які також реалізовано у вигляді відповідних віртуальних інструментів. Розроблений віртуальний інструментарій дозволяє організувати дистанційне навчання","PeriodicalId":34054,"journal":{"name":"Visnik Cherkas''kogo derzhavnogo tekhnologichnogo universitetu","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47988764","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}

{"title":"ДОСЛІДЖЕННЯ ХАРАКТЕРИСТИК БІМОРФНИХ П’ЄЗОЕЛЕКТРИЧНИХ ПЕРЕТВОРЮВАЧІВ","authors":"Костянтин Вікторович Базіло","doi":"10.24025/2306-4412.2.2019.166332","DOIUrl":"https://doi.org/10.24025/2306-4412.2.2019.166332","url":null,"abstract":"","PeriodicalId":34054,"journal":{"name":"Visnik Cherkas''kogo derzhavnogo tekhnologichnogo universitetu","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68825112","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}

{"title":"КОМПЛЕКСНА ОЦІНКА ТЕХНОГЕННОГО ВПЛИВУ НА ДОВКІЛЛЯ ПО РЕГІОНАХ УКРАЇНИ","authors":"Т.П. Гончаренко, Людмила Іванівна Жицька, Любов Іванівна Плахотня","doi":"10.24025/2306-4412.2.2019.167801","DOIUrl":"https://doi.org/10.24025/2306-4412.2.2019.167801","url":null,"abstract":"У статті представлено інструментарій оцінювання впливу техногенних загроз на стан екологічної безпеки регіонів України, розглянуто сутність використаної в роботі методики екологічного оцінювання території на основі натуральних (абсолютних і відносних) показників. Для розрахунків інтегральних регіональних показників впливу на довкілля використано статистичну інформацію про основні показники техногенного навантаження на навколишнє природне середовище за різними видами екодеструктивної діяльності: забір води, скиди у воду, викиди в атмосферу та їх щільність, наявність відходів, ерозія і деградація ґрунтів, пошкодження лісових насаджень, поточні екологічні витрати. Важливою перевагою цього методу є об’єктивність, що базується на використанні офіційних даних державних установ. За результатами розрахунків інтегральних показників техногенного впливу на довкілля здійснено групування та ранжування регіонів України, сформульовано висновки та запропоновано можливі рекомендації щодо прийняття обґрунтованих рішень по використанню оцінки техногенного впливу на території регіонів держави.","PeriodicalId":34054,"journal":{"name":"Visnik Cherkas''kogo derzhavnogo tekhnologichnogo universitetu","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68825132","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}

{"title":"ИСПОЛЬЗОВАНИЕ SMART PIEZOCERAMICS ДЛЯ ОБРАБОТКИ ПОЧВЫ В СЕЛЬСКОМ ХОЗЯЙСТВЕ","authors":"С. А. Филимонов, А.В. Батраченко, Сергей Сергеевич Ященко, Н. В. Филимонова","doi":"10.24025/2306-4412.2.2019.169817","DOIUrl":"https://doi.org/10.24025/2306-4412.2.2019.169817","url":null,"abstract":"The agriculture is a sector of the economy aimed at providing the population with food and obtaining raw materials for a number of industries. The agricultural industry is one of the most important sectors and is represented in almost all countries. The food security of states depends on the state of this industry. The plow is the main tool for cultivating the soil in agriculture. At present, we can observe various improvements in the technology for tillage and harvesting, while the main organ of cultivation has not undergone major changes, except for the introduction of more durable and reliable materials. However, tillage is still one of the most energy intensive operations in modern agricultural production. The use of the latest high-performance machinery and equipment while reducing metal consumption and energy consumption is one of the main objectives of the development of modern engineering. However, in this way there are limitations to the performance of traditional machines, the efficiency of which varies in the range of 0.19-0.38. One of the ways to improve tillage and reduce friction between the soil and the plow consists in the use of vibration technologies, which can have a significant effect. Vibration technique and technology are radically different from traditional prototypes. The use of vibration methods in various spheres of human activities and, in particular, in agriculture offers great prospects for accelerating technological progress on a qualitatively new basis. The aim of the work is to improve the cultivation working bodies by reducing the total amount of traction resistance (friction) of the soil on the surface of the ploughshare and reducing the sticking of the working bodies by using SMART PIEZOCERAMICS and vibration principles. The main features of smart designs are: embedded or surface mounted sensors; built-in or surface-mounted actuators; control element diagrams for the implementation of the monitoring system (which allow to process the data from the sensors to make an appropriate decision). The essence of this technology when used in the cultivation of the soil is as follows. The piezoceramic element is tightly located on the surface of the plow blade. Due to the presence of the piezoelectric element of direct and reverse piezoelectric effect, it can be used as an actuator (vibrator) or sensor. To determine the amplitude of oscillations of a piezoceramic element, numerical simulation has been performed using the COMSOL Multiphysics software package. By mathematical modeling, it has been established that the main resonant frequencies of the developed plow design correspond to 150, 2950, 4750, 6050, 13350, 17950, 18550 Hz. The maximum oscillation amplitude of the plow blade corresponds to a frequency of 18,550 Hz.","PeriodicalId":34054,"journal":{"name":"Visnik Cherkas''kogo derzhavnogo tekhnologichnogo universitetu","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68825219","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}

{"title":"МЕДИКО-ЕКОЛОГІЧНА ОЦІНКА ЯКОСТІ БУТИЛЬОВАНОЇ МІНЕРАЛЬНОЇ ПИТНОЇ ВОДИ","authors":"Неллі Вікторівна Загоруйко, Людмила Борисівна Ящук, Наталія Іванівна Свояк","doi":"10.24025/2306-4412.2.2019.169495","DOIUrl":"https://doi.org/10.24025/2306-4412.2.2019.169495","url":null,"abstract":"","PeriodicalId":34054,"journal":{"name":"Visnik Cherkas''kogo derzhavnogo tekhnologichnogo universitetu","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68825210","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}

{"title":"ДОСЛІДЖЕННЯ ФАЗОВИХ ПЛОЩИН МОДЕЛІ ІМУНОСЕНСОРА НА ПРЯМОКУТНІЙ РЕШІТЦІ З ВИКОРИСТАННЯМ ДИФЕРЕНЦІАЛЬНИХ РІВНЯНЬ ІЗ ЗАПІЗНЕННЯМ В ПАКЕТІ R","authors":"Василь Петрович Марценюк, А. С. Сверстюк, Наталія Василівна Козодій, Євген Олександрович Давиденко","doi":"10.24025/2306-4412.2.2019.172004","DOIUrl":"https://doi.org/10.24025/2306-4412.2.2019.172004","url":null,"abstract":"","PeriodicalId":34054,"journal":{"name":"Visnik Cherkas''kogo derzhavnogo tekhnologichnogo universitetu","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48292513","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}