Факультет психології, історії та соціології
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Item ANALYTICAL MODEL OF A SHIP’S STABILITY ON A REGULAR WAVE(2024) Zinchenko, S.; Tovstokoryi, O.; Kyrychenko, K.; Nosov, P.; Popovych, I. S.; Попович, І. С.One of the main dangers of sailing in storms is the change in the stability of ships due to waves, which in some cases can even lead to its overturning. Therefore, the task of constant control of the ship’s stability during the voyage is an urgent scientific and technical task. A systematic approach, analysis and synthesis, methods of mathematical analysis, integral calculus, and numerical modeling were used during the research. An analytical model was developed for calculating the restoring moment in the roll channel under regular waves, depending on the geo- metric dimensions of the ship’s hull, immersion parameters, ship motion parameters, and wave parameters. The obtained results di↵er from the known solutions in that they have an analytical form and can be used to assess stability in real time. The theoretical significance of the obtained results lies in the development of an analytical model for estimating sta- bility on regular excitation. The practical value of the obtained results consists in: checking the operability of the analytical model during a computational experiment and the possibility of its use in an on-board computer of an automated or automatic control system.Item APPLICATION OF THE CONDITIONAL OPTIMIZATION METHOD IN THE PROBLEM OF VESSEL STORMY SAILING(2024) Zinchenkо, S.; Tovstokoryi, O.; Mateichuk, V.; Nosov, P.; Popovych, I. S.; Kyrychenko, K.; Попович, І. С.Stormy sailing conditions are among the most extreme and dangerous. The rocking of the ship in the roll and trim channels greatly exhausts the crew, which leads to an increase in the number of errors when making management decisions. The situation worsens also due to the fact that during a storm such dangerous phenomena as harmonic and parametric resonances, a decrease in stability on passing waves, broaching, impacts of group waves in the stern, which can lead to the , hull destruction, overloads of the power plant and occurrence of blackouts. The most radical way to combat such dangers is the automation of control processes. The authors have developed a method of automatic and optimal control of the ship's movement in storm conditions, which allows to avoid the occurrence and development of dangerous phenomena that lead to the capsize of the ship. The obtained result is explained by: the use of an on-board computer in the ship's motion control system; constant measurement of ship movement parameters and waves; finding, at each step of the on-board computer, safe and optimal values of the ship's course and speed by solving the optimization problem; taking into account when solving the optimization problem linear and non-linear constraints of the type of inequalities that define dangerous areas; maintaining safe and optimal movement parameters using the automatic control system. The theoretical significance of the obtained result lies in the development of a method of automatic and optimal control of the ship's movement in conditions of stormy sailing. The practical significance of the obtained results consists in: verification of the developed method by mathematical modeling; the possibility of using the method in the automatic control system, which allows to automate and optimize the processes of controlling a ship in a storm, reduce the influence of the human factor on control processes, crew fatigue, risks of losing the ship and cargo, and generally increase the safety of shippingItem AUTOMATIC PREVENTION OF THE VESSEL’S PARAMETRIC ROLLING ON THE WAVE(2024) Kobets, V.; Zinchenko, S.; Tovstokoryi, O.; Nosov, P.; Popovych, I.; Попович, I.; Gritsuk, I.; Perederyi, V.Parametric resonance is one of the most dangerous phenomena that occurs during a storm. In the event of a parametric resonance, an undamaged and properly loaded vessel can capsize within seconds. The essence of parametric resonance is to change the parameters of the vessel as an oscillating system. In this case, the coefficients of the differential equations of the vessel model become functions of time. Parametric oscillations are observed at a certain ratio between the frequency of the external influence and the frequency of the system's own oscillations. Parametric resonance in the roll channel is especially dangerous, which leads to a sharp increase in the amplitude of the vessel's rolling, water entering the deck and inside the vessel's hull, loss of stability and possible capsizing. The existing methods of storming are not effective enough, which is due to the use of visual methods for estimating the parameters of turbulence and manual graphic constructions, significant time delays between obtaining data for calculation and determining safe parameters of motion, the lack of constant measurement of turbulence parameters and refinement of safe motion parameters, the difficulty of selecting the dominant factor from the system dangerous factors, intuitive assessment of the level of danger. The authors have developed a method of automatic avoidance of parametric resonance, which differs from existing methods in that it automates the processes of measurement and information processing, reduces delays in decision-making, reduces the influence of the human factor on control processes, reduces crew fatigue, reduces the risks of losing the vessel and cargo, and in general increases the navigation safety. The developed method can be used for both manual and automatic control. In the manual control mode, the shipmaster has the opportunity to use automatically measured information and the results of its processing - visualization of parametric resonance areas and the position of the phase point for making management decisions. In the automatic control mode, the system itself calculates and implements safe movement parameters, and the shipmaster only observes its operation. The obtained results are reproducible and can be used to develop the functionality of automated systems and/or automatic parametric resonance avoidance modules.Item DEVISING AN APPROACH FOR THE AUTOMATED RESTORATION OF SHIPMASTER’S NAVIGATIONAL QUALIFICATION PARAMETERS UNDER RISK CONDITIONS(2024) Ponomaryova, V.; Nosov, P.; Ben, A.; Popovych, I.; Попович, I.; Prokopchuk, Y.; Mamenko, P.; Dudchenko, S.; Appazov, E.; Sokol, I.The object of this study is the safety control system of ship management, by identifying and restoring the qualifica tion parameters of shipmasters in criti cal situations. The task solved in the study is the timely determination of an insufficient level of qualification for the perfor mance of certain operations in con trolling the movement of the ship, by applying a formal-logical model of de tecting the intuitive actions of the ope rator-shipmaster and gradually restor ing his/her qualification parameters using the devised method. The stages of development and the formal-logical structure of the model and method in terms of cognitive auto mation were described in detail as the study results. It was possible to ensure early detection of risks when controlling the movement of the ship in 56 % of cases, during a laborato ry experiment on simulators, which in 24 % of cases turned out to be particu larly dangerous. The interpretation of the results in volved algorithmizing complex and for malized data on the actions of opera tors and the application of the method of restoring their qualification para meters, which allowed a comprehensive approach to safety management. The distinguishing features of the findings were to predict the level of danger by simulating maritime opera tions with input navigational and indi vidual conditions. This made it possible to improve the effectiveness of ope rations to 89 %, reduce the phenome non of loss of control over the course to 32 %, reduce critical situations to 7 % and the cost of resources. The scope and conditions of practi cal use involve a comprehensive assess ment of external and internal influ ences on the level of danger, delay in decision-making by operators, as well as sailing conditions. The simulation results could be used to devise strate gies for planning maneuvers, predicting risks, and developing maritime securi ty systemsItem PRE-COMPETITION EXPECTATION PROFILES AMONG JUNIOR ATHLETES IN THE CONTEXT OF ALTERED SPORTING CONDITIONS(2023) Popovych, I. S.; Kosmii, M.; Hrys, A.; Hoi, N.; Dyhun, I.; Hoian, I.; Nosov, P.; Попович, І. С.The primary aim of this research was to empirically examine and substantiate the of various pre-competition expectations exhibited by junior athletes, particularly in light of altering conditions within a sporting contest.The study involved a cohort of adolescents (n=267) (Мe=16; М=16.32; SD=±1.71). The participants were representatives of team sports such as football and volleyball, as well as individual sports such as artistic gymnastics and track and field. The empirical investigation focused on junior athletes enrolled in an educational training course at two sports schools: “LSSCY Enerhetyk” in Lviv, Ukraine and “SSSYOR №1” in Ivano- Frankivsk, Ukraine. Methods. Psychodiagnostic tools were employed to gauge the content parameters of both expectations and the concept of a safe competition space. Standard coefficients were applied to discern statistically significant correlations within the collected data. The categorization of pre-competition expectations was accomplished through the application of k-means clustering. Results. This research established statistically significant correlations cognitive, emotional and behavioral components of psychological safety and expectation parameters underscoring the pivotal influence of both the competition space and pre-competition expectations on actual competitive performance. The delineation of five distinct precompetition expectation types emerged: real (RTE), active analytical (AATE), moderate (MTE), passive moderate (PMTE) and unreal (UTE). The findings provided robust evidence supporting that RTE, AATE and MTE constitute favorable expectation types, contributing positively to desired outcomes. In contrast, PMTE and UTE were identified as negative types, exhibiting a detrimental impact on achieving desirable results. Notably, the study demonstrated and substantiated the heightened risk associated with PMTE establishing it as the most perilous type of expectation for athletes engaged in competitive activities. Discussion and conclusions. This study revealed a significant negative correlation, particularly the cognitive component of psychological safety (CC), with expected status (ESA). This finding underscores the increased risk associated with this psychological configuration because it promotes a closed convergent position with subsequent distancing. Such a psychological state, coupled with a diminished awareness of competition activity (ACA), consistently leads to tactical errors in both offensive and defensive actions among athletes. These errors, in turn, disrupt team interaction and hinder the execution of a game plan. It was generalized that the identified precompetition expectation types among junior athletes, especially under altering sporting conditions, carry a distinctive scientific novelty. Moreover, these findings can be practically operationalized in the realm of educational training preparation.Item CONTROL OF THE PIVOT POINT POSITION OF A CONVENTIONAL SINGLE-SCREW VESSEL(2023) Kobets, V.; Popovych, I. S.; Zinchenko, S.; Tovstokoryi, O.; Nosov, P.; Kyrychenko, K.; Попович, І. С.The issues of using the pivot point concept for the control of a conventional single-screw vessel are considered. The relevance of the task lies in the need for a more accurate assessment of the vessel's trajectory and the necessary area for maneuvering, since conventional single-screw vessels have low maneuverability, and their share in the total number of vessels exceeds 85%. For manual maneuvering of the vessel, using the pivot point, it is important to know the position of the pivot point relative to a fixed point of the vessel’s hull. Traditionally, this point was the gravity center/middle frame of the vessel. The disadvantage of the existing approaches to the calculation of the pivot point position was the use of a simplified calculation scheme ”gravity center – pivot point”, which did not take into account the dependence of the pivot point position on the rotation center position. In previous works, the authors of this article proposed the “gravity center – rotation center – pivot point” calculation scheme, which made it possible to more accurately estimate the pivot point position, taking into account the position of the rotation center. In the refined scheme proposed by the author, the pivot point position was determined relative to the moving rotation center, which is not convenient for manual control. In this article, for a single-screw conventional vessel, a formula and graphs of pivot point position relative to a fixed point on the vessel’s hull (gravity center/middle frame) are obtained, for the refined calculation scheme “gravity center – rotation center – pivot point”. The obtained formulas and graphs of the pivot point position relative to a fix point (gravity center/middle frame) allow us to use them both for automatic and manual control of the vessel’s movement. Mathematical modeling of a single-screw conventional vessel movement in the closed circuit “Control object – Control system” was carried out for the two considered calculation schemes. The simulation results showed that the use of the refined calculation schem allows for a 23% more accurate assessment of the vessel’s trajectory and the required maneuvering area.Item AUTOMATIC RESET OF KINETIC ENERGY IN CASE OF INEVITABLE COLLISION OF SHIPS(2023) Zinchenko, S.; Kyrychenko, K.; Grosheva, O.; Nosov, P.; Popovych, I. S.; Mamenko, P.; Попович, І. С.Considered issues of automatic reset of kinetic energy along the gradient in case of inevitable collision of ships. The target function of the fastest reset of kinetic energy is formed in the form of a scalar product of the gradient vector at the location of the vessel and the vector of the right parts of the mathematical model of the longitudinal and angular movement channels containing control. To form optimal controls, a nonlinear optimization procedure was used, taking into account control restrictions. The own ship's movement parameters (speed and course) used in the optimization procedure are measured by speed and course sensors, and the target's movement parameters are estimated from the measured values of the own ship's speed and course and the measured relative movement parameters using radar. The workability method was verified by mathematical modeling in a closed circuit with a control object. The results of the simulation showed that the automatic module provides a 9-fold reduction in the kinetic energy of the collision. The use of the automatic kinetic energy reset module in the event of an imminent collision will reduce the influence of the negative impact of decisions when handling a vessel under the influence of stress, reduce crew fatigue, prevent damage or even loss of the vessel and cargo, and save human lives.Item CONTROL OF THE PIVOT POINT POSITION OF A CONVENTIONAL SINGLE-SCREW VESSEL(2023) Zinchenko, S.; Kobets, V.; Tovstokoryi, O.; Kyrychenko, K.; Nosov, P.; Popovych, I. S.; Зінченко, С. М.; Кобець, В.; Товстокорий, О.; Кириченко, К. В.; Носов, П.; Попович, І. С.The article deals with the issue of reducing the maneuvering area of a conventional single-screw vessel due to the use, when determining controls, of the refined calculation scheme "gravity center – rotation center – pivot point".Item INTELLIGENT SYSTEM CONTROL OF THE VESSEL EXECUTIVE DEVICES REDUNDANT STRUCTURE(2023) Zinchenko, S.; Kobets, V.; Tovstokoryi, O.; Nosov, P.; Popovych, I. S.; Попович, І. С.The article examines the issues of optimal control of vessels with redundant structures of executive devices on the example of an offshore vessel with two stern azimuth control devices (ACD) and a bow thruster. Known technical solutions for optimal control of redundant structures in the aviation, space, marine and other industries. The nearest technical solutions in the shipping are dynamic positioning systems (DP-systems) of manufacturers Navis, Marine Technologies, Rolls Royce, Transas, Consberg. The main purpose of such systems is to maintain the vessel in a given position with the help of active control during work (drilling, cable laying, cargo overloading, etc.). The main components of DP-systems are: sensors for measuring the absolute and relative position of the vessel (DGPS and Reference Systems), onboard computer with software and redundant structures of executive devices. Redundant structures in DP-systems are used to increase the reliability of the automated system. The article developed a method of using redundant structures also for optimization of control processes. The purpose of the work is to automate and optimize the processes of controling vessels with redundant structures of executive devices. On the example offshore vessel with two stern ACD and a bow thruster, optimal controls are considered that ensure: minimum energy consumption for performing DP operations, maximum control forces in the channels of longitudinal and lateral movement, which are used to move away from the platform in the presence of a downwind, as well as reconfiguration of redundant structures. The results of the experiment showed that the optimization of control processes allows to reduce energy consumption by (35–50) % and increase the control forces of the structure in the channels of longitudinal and lateral movement. At the same time, the additional load on the calculation cycle of the on-board controller, caused by the solution of optimization problems, is 25–50 ms, which is within (2.5–5) %.Item OPERATIONALIZATION OF FOOTBALLERS’ EMOTIONAL INTELLIGENCE IN THE DIMENSIONS OF MOTIVATIONAL ORIENTATION: ANALYSIS BASED ON THE BASIC POSITIONS(2023) Popovych, I. S.; Plokhikh, V. V.; Hrys, A.; Pavliuk, M.; Nosov, P.; Zinchenko, S.; Попович, І. С.The purpose is to conduct empirical research on the correlation of emotional intelligence with footballers’ motivational orientation by functional realization (the basic position). The study identifies differences in the parameters of footballers’ emotional intelligence by the basic position. The research involved 74 footballers representing such football clubs: FC “Krystal” (Kherson, Ukraine), FC “Chliba Khersonshchyny” (Kherson, Ukraine), FC “Enerhiia” (Nova Kakhovka, Ukraine), FC “Mykolaiv” (Mykolaiv, Ukraine). Research methods: valid and reliable psycho-diagnostic instruments – the method “EQ questionnaire” (Hall, 2000) and questionnaire “Athlete’s Motivational Orientation” (“AMO”) (Smoldovskaya, 2022); purposeful non-participant observation with standard protocols; statistical methods for identifying significant differences. Results. The study established empirically and substantiated that functional realization (the basic position) in footballers’ competition activities correlates with motivational orientation and sufficiently developed emotional intelligence. The integral index of emotional intelligence (IIEQ) of strikers (Me=38.0) and midfielders (Me=38.0) is characterized by a high level and obvious motivational orientation towards a high result. The study shows that a high level of development of footballers’ ability to manage their emotions and self-motivation corresponds to a high level of involvement in the activity performed and aspiration for team cohesion, for a synergetic contact with spectators. Four strongest (р<.010) significant correlations of self-motivation with subject-directed (rs=.289), result-directed (rs=.344) and personally-directed motivational orientation (rs=.244) and empathy with socially-directed motivational orientation (rs=.267) were established. Conclusions. The study substantiates that focusing on the development of footballers’ emotional intelligence, in particular, of such parameters as selfmotivation and empathy can give an essential advantage over competitors. It shows that the obtained scientific facts constitute a number of operational elements which should be taken into consideration by coaches in team sports.