Моделювання автономних інверторів напруги джерел живлення однофазних асинхронних приводів

Мета роботи. Розробка оригінальних моделей інверторів напруги адаптованих до управління однофазним асинхронним двигуном із подальшою перспективою побудови автоматичних систем підвищення енергоефективності побутових механізмів, а також розробки навчальних комплексів вивчення роботи перетворювачів частоти для формування навичок з їх ремонту та налагодження. Методи досліджень.  Для проведення досліджень використані положення теорії електричних машин, методи синтезу цифрових систем керування, способи та методи моделювання у  САПР електронна лабораторія компанії NATIONAL INSTRUMENTS  складової Multisim, методи схемотехнічного проектування. Отримані результати. Розроблено та побудовано моделі  розподільників імпульсів для випадків живлення однофазних асинхронних двигунів з мостовими роздільно-індивідуальними інверторами пускової та робочої обмоток, напівмостових інверторів із двополярним джерелом живленням та  трифазного інвертора із керуванням за 180 градусною діаграмою управління. Отримано часові діаграми наочного підтвердження  працездатності системи за задекларованими принципами.    Наукова новизна. Запропоновано ряд оригінальних діаграм  перемикання ключів силової ланки моделей розподільників імпульсів автономних інверторів напруги із врахуванням фазового зсуву та тривалості пауз перемикання плечей силового блоку задля уникнення аварійних режимів, надано рекомендації щодо рівнів частот генерації, які подаються на вхід комбінаційних схем, показано перспективу  використання даної системи у складі однофазного асинхронного електропривода із можливістю енергоефективного керування. Практична цінність. Запропоновані оригінальні модельні рішення автономних інверторів напруги, які адаптовані до сумісної роботи із однофазним АД, можуть бути корисними для розробників перетворювальної техніки та стати наочним матеріалом для застосування їх у навчальному процесі із підготовки фахівців спеціальності 141 «Електроенергетика, електротехніка та електромеханіка»

DEVELOPMENT OF AUTOMATIC SPEED CONTROL SYSTEM FOR SYNCHRONOUS DRIVE OF HIGH-POWER TUMBLING MILLS

Study the possibilities to increase the efficiency and decrease energy consumption of powerful tumbling mills

Responsibility development as academic integrity tool for translation and public administration students

This paper deals with the development of students’ responsibility as a tool of academic integrity and it aims to develop the way of improvement of students’ responsibility of dealing with information and consider the results of its implementation. The study involved theoretical analysis and experimental activity. The research data were collected using the special questionnaire for study responsibility in dealing with information. The authors suggest the development of a module covering ethics of dealing with information to be included in the courses within students’ curriculum. The experimental activity of such courses implementation resulted in the improvement of levels of students’ responsibility. The experimental data obtained during the implementation of two module topics into the courses of English for Specific Purposes and Practice of Translation from the First Foreign Language enabled the authors to admit their efficiency for the development of responsibility and academic integrity

THE RESULTS OF THE INVESTIGATION OF CURRENT STATE OF INFORMATION CULTURE DEVELOPMENT PROBLEM IN THE CONTEXT OF FUTURE TRANSLATORS TRAINING FOR THE PROFESSIONAL ACTIVITY

The article deals with the results of the investigation of future translators information culture development problem as the aspect of vocational training. The investigation involved the analysis of the documents regulating the future translators education, the questionnaire of the students, academic staff, and university entrants. The article characterizes the future translators information culture development under the conditions of higher educational institutions as unsystematical and inefficient process. The author considers approaches to the integration of information culture development to the training process. As the prospective investigations the search of intensification of future translators training under the conditions of higher educational institutions was mentioned

Technological and Ethical Challenges of Translators Training in Ukraine and Issues of Modern ICT Development

This paper aims to explore the challenges of the Ukrainian system of translators training caused by modern technology advancement. The paper applies established ideas in practical approaches to the improvement of translators training system with respect to new technological requirements for the professionals. The relevant data were obtained by the analysis of questionnaire results. The problems of education of translators in Ukraine under the conditions of dramatic social and political changes are considered. The lack of training in the sphere of technology application for professional development is pointed out on the basis of the research results analysis. The research has also shown the contradictions between the needed level of technological skills of the students of the translation department and modern professional standards. The changes of certification standards for translators in terms of information literacy skills, ethics, and management as related to technological advancement are shown. The paper discusses the results of the original survey involving high school graduates, students, and faculty staff. The recommendations proposed are based on the critical study of the peculiarities of the system of translators training in Ukraine

Improvement of the procedure of new filter masks development

The purpose is to substantiate theoretically the design of elastomeric half mask and canister of respirator of long-term protection. To develop the models for theoretical calculations of protective properties of dust masks the theory of non-stationary filtration and hydro aerodynamics was applied. To develop the digital model of a head the downhill simplex method was applied reflecting separate face features considering sex or age; to determine the halfmask surface the free energy equation for bowed plate being described by two-dimension spline surface was used with its unknown coefficients determined by method of proportional parts based on three-dimension coordinates of anthropometric face features. The main anthropometric face features influencing halfmasks design were determined to develop polygonous 3D model of head. According to its determined basic coordinates the surface of halfmask was determined using method of interpolation. Considering the mathematical model describing the movement of dust flows near a halfmask and in canister the dependences of distribution of air flow speed in a canister of variable geometry were set and kinematic parameters of dust-laden airflow according to a canister volume were determined. Reasonable geometric parameters of canister were determined; transient modulation from filter to inlet valve hole is performed as a contractor

Improvement of the procedure of new filter masks development

The purpose is to substantiate theoretically the design of elastomeric half mask and canister of respirator of long-term protection. To develop the models for theoretical calculations of protective properties of dust masks the theory of non-stationary filtration and hydro aerodynamics was applied. To develop the digital model of a head the downhill simplex method was applied reflecting separate face features considering sex or age; to determine the halfmask surface the free energy equation for bowed plate being described by two-dimension spline surface was used with its unknown coefficients determined by method of proportional parts based on three-dimension coordinates of anthropometric face features. The main anthropometric face features influencing halfmasks design were determined to develop polygonous 3D model of head. According to its determined basic coordinates the surface of halfmask was determined using method of interpolation. Considering the mathematical model describing the movement of dust flows near a halfmask and in canister the dependences of distribution of air flow speed in a canister of variable geometry were set and kinematic parameters of dust-laden airflow according to a canister volume were determined. Reasonable geometric parameters of canister were determined; transient modulation from filter to inlet valve hole is performed as a contractor

Improving the risk management process in quality management systems of higher education

Abstract The purpose of this paper is to improve the risk management process in the quality management system of higher education, taking into account the hazardous factors that increase the probability of occurrence and severity of consequences of undesirable events, as well as favorable factors that reduce the probability of occurrence and severity of consequences of hazardous events. The basis of risk management in the quality management systems of higher education institutions is the “Bowtie” method, which involves six main steps of identifying inconsistency, determining the impact of hazardous and favorable factors according to the impact group, ranking hazardous and favorable factors, calculating risk, substantiating precautionary measures and checking calculations. To rank hazardous and favorable factors, the authors used the “Decision Making Trial and Evaluation” method (hereinafter—DE-MATEL), which is based on paired comparison and decision-making tools based on graph theory. An improved process is proposed for risk assessment, which differs from the known ones by the presence of the identification of the cause-and-effect relationship “hazard (inconsistency)-hazardous event-consequences”, identification of hazardous and favorable factors of the internal and external environment that affect the probability and/or the degree of severity of a hazardous event—the appearance of an inconsistency, which is carried out after the inconsistency has been determined; determination of causal hazardous and favorable factors by an acceptable method. Registers of inconsistencies (hazards), hazardous and favorable factors have been developed and proposed based on the requirements for accreditation of educational programs and the international standard ISO 9001:2015, which will allow, based on a risk-oriented approach, to provide a basis for setting the goals of a higher education institution under martial law in order to guarantee effective implementation of the mission and strategy. They are proposed for decision-making in the quality management systems of educational organizations on the substantiation of precautionary or corrective measures based on ranking the risks from identified inconsistencies, which are determined taking into account the impact of the entire set of identified significant hazardous and favorable factors. The value of this paper is to improve the quality risk management process in educational organizations, taking into account the impact of hazardous and favorable factors, and to develop an appropriate step-by-step algorithm of actions and a risk assessment form