scholarly journals МЕТОДИ СИНТЕЗУ ВИМІРЮВАЛЬНИХ СИГНАЛІВ З НОРМОВАНИМ СПЕКТРОМ

2019 ◽  
pp. 89-98
Author(s):  
Олена Анатоліївна Дакі
Keyword(s):  
Complex Systems ◽  
Water Transport ◽  
Traffic Control ◽  
Technical Condition ◽  
Technical State ◽  
Automated Control ◽  
Radio Navigation ◽  
Accuracy Of Measurements ◽  
Methods Of Synthesis ◽  
Radio Systems

It is known that the requirements for the efficiency and quality of carrying out operations for controlling the technical condition of complex systems are increasing due to the transfer of systems and objects to operation in a state of technical condition. In the article the presence in the practice of controlling the technical condition of complex systems of contradiction is considered, namely, the provision of the given reliability of information about the technical state of the radio navigation complexes of the traffic control of water transport means requires an increase in the volume and accuracy of measurements in evaluating their characteristics on the one hand, and on the other - the lack of methods for automating processes the synthesis of the measurement signals and processing feedback on them for this. Traditional measurement signals for monitoring the technical condition of radio systems are sinusoidal oscillations. However, this approach requires a considerable workload of control and leads to a reduction in the efficiency of its conduct due to the need to introduce inertial blocks to increase impedance protection. Avoid this disadvantage is possible due to the use of multi-frequency signals with a normalized spectrum - polyharmonic signals. They represent the sum of a certain number of useful harmonics, modulated signals with a normalized spectrum and different forms of binary signals. Therefore, the actual scientific problem is the development of methods of synthesis of polar harmonic measuring signals and processing of reviews on them to increase the reliability and efficiency of automated control of the technical condition of radio systems. According to the results of the analysis of measuring signals and known methods for the synthesis of measuring signals, the results of the study of the subject area, which include the study of the methods of synthesis of measuring signals with the normalized spectrum, are proposed in order to improve the process of automated control of the technical state of radio systems. In addition, features of the experimental verification of the obtained theoretical results and the development of recommendations for their implementation for the automated control of the technical state of the radio navigation complexes for controlling the movement of water transport vehicles are presented

scholarly journals МЕТОД РОЗРАХУНКУ ФУНКЦІЇ РОЗПОДІЛУ ПАРАМЕТРІВ КОНТРОЛЮ РАДІОНАВІГАЦІЙНИХ КОМПЛЕКСІВ ЗАСОБІВ ВОДНОГО ТРАНСПОРТУ

2019 ◽  
pp. 76-84
Author(s):  
Олена Анатоліївна Дакі
Keyword(s):  
Water Transport ◽  
Quantitative Characteristic ◽  
Technical Condition ◽  
Technical State ◽  
Navigation Systems ◽  
Automated Control ◽  
Radio Navigation ◽  
Accuracy Of Measurements ◽  
Navigation Equipment ◽  
Electronic Elements

The article shows that the use of modern navigation systems and complexes for controlling the movement of water transport vehicles allows for safe navigation. It is substantiated that the proper work of navigation equipment – radio navigation complexes – depends on their technical condition. Thus, the presence in the radio navigation complexes of water transport facilities of a large number of electronic elements and radio channels and the aggressive environment of their operation increase the role of methods and instruments for monitoring and diagnosing the technical state of the radio navigation complexes during operation to ensure the trouble-free operation of water transport facilities. In determining the technical state of the radio navigation complexes of water transport vehicles there is a known contradiction in the control of complex systems of control: the provision of a given reliability of information about the technical state of the radio navigation complexes of the movement of water transport means requires an increase in the volume and accuracy of measurements in assessing their characteristics on one side, on the other - methods for automating the process of synthesizing the measurement signals and processing feedback on them for this. Within this contradiction, the actual scientific problem is the development of methods for synthesizing measurement signals and processing reviews on them to increase the reliability and efficiency of automated control of the technical state of the radio navigation systems for controlling the movement of water transport vehicles. The purpose of this work is to develop a method for calculating the function of distribution of parameters of control of radio navigation complexes of water transport vehicles. The conditional distribution function is proposed, which is the main quantitative characteristic of the control of the radio navigation complexes of water transport facilities. This feature contains all the information about the control parameters and allows you to determine the technical state of the radio navigation complexes. The method of calculating the function of distribution of parameters of control of radio navigation complexes of water transport means is developed. Such a method is proposed to be used in substantiating the characteristics of the measuring signals of the control of the radio navigation complexes of the means of water transport during operation

scholarly journals МЕТОД ДИНАМІЧНОГО ПРОГРАМУВАННЯ ЩОДО СИНТЕЗУ ВХІДНОГО ВИМІРЮВАЛЬНОГО СИГНАЛУ ДЛЯ КОНТРОЛЮ ТЕХНІЧНОГО СТАНУ РАДІОНАВІГАЦІЙНИХ КОМПЛЕКСІВ

2019 ◽  
pp. 57-63
Author(s):  
Олена Анатоліївна Дакі
Keyword(s):  
Dynamic Programming ◽  
Water Transport ◽  
Traffic Control ◽  
Complex Form ◽  
Technical State ◽  
Dynamic Programming Method ◽  
Navigation Systems ◽  
Radio Navigation ◽  
Measuring Signal ◽  
Method Of Dynamic Programming

The article shows that the use of modern navigation systems and complexes for controlling the movement of means of water transport makes it possible to ensure safe navigation. It is substantiated that the proper functioning of the means of navigation support – radio navigation complexes – depends on their technical condition. The work substantiates and investigates mathematical expressions for calculating the parameters of input measuring signals for controlling the technical state of radio navigation complexes. The results of the analysis of methods for determining the technical state of radio electronic devices are presented, based on studies of their dynamic characteristics. It has been shown that inertial units (elements) are used to increase the noise immunity coefficient of radio navigation complexes, which increases the time to control the harmonic signal of a sinus or cosine type. It is possible to avoid this disadvantage by using test signals with a normalized spectrum, representing the sum of a certain number of useful harmonics – test signals of complex form. The purpose of the article is to develop a method of dynamic programming for the synthesis of the input measurement signal for monitoring the state of the radio navigation complexes of the means of water transport. The obtained recurrence ratio can be used to determine the characteristics of a measuring signal in the case of continuous monitoring of the output signal. To do this, you need to replace the integral in the expression for the synthesis criterion with the corresponding integral sum. The method of dynamic programming when using personal computers in comparison with other methods has the advantage since it allows you to use a cyclic program in calculations. However, although in the dynamic programming method at each stage it is necessary to calculate and memorize only one function, with a considerable amount of coordinates (with a significant amount of control parameters and rather complex systems and complexes of navigation and traffic control of sea vessels), the volume of calculations can be very large.

scholarly journals ОСОБЛИВОСТІ АВТОМАТИЗАЦІЇ КОНТРОЛЮ ТЕХНІЧНОГО СТАНУ МОРСЬКОГО ТРАНСПОРТУ

World Science ◽  
2019 ◽  
Vol 1 (3(43)) ◽  
pp. 19-25
Author(s):  
Коломієць Оксана Михайлівна
Keyword(s):  
Water Transport ◽  
A Priori ◽  
Technical Condition ◽  
Software Implementation ◽  
Effective Strategy ◽  
Kutta Method ◽  
A Priori Information ◽  
Automated Control ◽  
Runge Kutta Method ◽  
Priori Information

The article analyzes the principles of automation of the control of the technical condition of water transport vehicles, which has been determined: the principle of coherence; the principle of integration; Principle of independence of execution.It is determined that the most effective strategy is to improve the methods of automated control of the technical condition of water transport vehicles, which, unlike existing ones, is based on Markov processes, the Runge-Kutta method of numerical solution of the system of Kolmogorov differential equations and a priori information about the intensity of transitions from state to state.Using the software implementation of the model significantly improves performance due to the ergonomics of the interface and reduced number of operations.

ABOUT AUTOMATION OF CONTROL AND DIAGNOSIS OF TECHNICAL STATE OF HYDRAULIC DRIVES OF INDUSTRIAL EQUIPMENT

2021 ◽  
pp. 19-24
Author(s):  
V. V. Bodrov ◽  
R. M. Bagautdinov ◽  
M. E. Goydo
Keyword(s):  
Hydraulic Drive ◽  
Technical Condition ◽  
Technical State ◽  
Industrial Equipment ◽  
Automated Control ◽  
Operating Modes ◽  
Hydraulic Equipment

The main tasks of automated control and diagnostics of the technical condition of hydraulic drives are formulated, criteria for assessing the technical condition of a hydraulic drive as a whole and its individual devices are considered, examples of test operating modes for hydraulic drives with a guide and proportional hydraulic equipment are given.

scholarly journals Analysis of vibrodiagnostics methods in the technical state study of designed multimedia mobile scenes

2019 ◽  
Vol 302 ◽  
pp. 01011
Author(s):  
Marcin Łukasiewicz ◽  
Michał Liss ◽  
Natalia Dluhunovych
Keyword(s):  
Modal Analysis ◽  
Diagnostic Tests ◽  
Research Process ◽  
Technical Condition ◽  
Technical State ◽  
Normal Operation ◽  
Design Stage ◽  
Analysis Methods ◽  
State Study ◽  
Diagnostic Research

The paper presents the possibilities of using vibroacoustic methods in the study of the technical condition of designed multimedia mobile scenes. In particular, the possibility of implementing modal analysis methods in modelling and diagnostic research process has been presented. The use of virtual methods enables diagnostic tests both at the design stage and at the stage of normal operation, whereas modal methods help to explain the nature of the work of the element under investigation.

scholarly journals Impact of the Engine Tuning on its Technical Condition Assessment Based on Limited Number of Available Parameters

2018 ◽  
Vol 1 (1) ◽  
pp. 721-728
Author(s):  
Marek Łutowicz
Keyword(s):  
Fuel Injection ◽  
Cooling Water ◽  
Technical Condition ◽  
Technical State ◽  
Injection Timing ◽  
Injection Equipment ◽  
Cooling Water Temperature ◽  
Exhaust Temperature ◽  
Marine Diesel ◽  
Engine Components

Abstract Due to the limited scope of the diagnostic equipment on the ship, the technical condition of the engine is based on the measurement of pressure and temperature at the available measuring points. Usually it is the exhaust temperature at the outlet of individual cylinders, supercharging pressure, oil temperature and cooling water temperature. Sometimes the bearing temperature and turbocharger speed are also measured. Normally, if the engine is adapted to this, the maximum combustion pressure is measured periodically although distorted through the channels with the indicator valves. The paper presents examples of the exploitation of marine diesel engines, where there is a discrepancy between the actual technical state of the engine and the technical state of the engine based on the traditional diagnostic method based on a limited set of available parameters. These discrepancies resulted, inter alia, from the regular fuel injection timing and fuel dose adjustment, so that the measured parameters were adequate to the actual load of the engine. This adjustment is justified, but leads to masking engine components wear symptoms. In this situation, it can only be stated that the state of the fuel injection equipment is suitable for the current technical state of the some engine components and does not provide a sufficient basis for the extension of the repair interval.

scholarly journals The Irregularity Change of the Technical State`s Elements of the Vehicle: form Submission

2021 ◽  
Vol 334 ◽  
pp. 02020
Author(s):  
Alexander Novikov ◽  
Sergey Grebennikov ◽  
Alexander Grebennikov
Keyword(s):  
Quantitative Assessment ◽  
Structural Parameters ◽  
Technical Condition ◽  
Technical State ◽  
Operational Cycle

Analyzed the use of the term «irregularity changes of technical condition of element’s vehicle» to certain stages of the operational cycle. Specific examples and quantitative assessment of irregularity changes the structural parameters for the elements, working independently, and interacting in the units or systems of the vehicle.

scholarly journals Absorption methods of control of technical condition of electrical insulation

2021 ◽  
pp. 45-50
Author(s):  
Ivan Kostjukov
Keyword(s):  
Control Method ◽  
Control Object ◽  
Dielectric Materials ◽  
Technical Condition ◽  
Technical State ◽  
Electrical Insulation ◽  
Short Term ◽  
Informative Parameters ◽  
Test Voltage ◽  
Methods Of Control

The article provides an overview of the most common methods for monitoring the technical state of electrical insulation, based on the applying of absorption phenomena arising in dielectric materials under the influence of DC voltage. The main provisions of the control method based on determining the voltage at the electrodes of the investigated capacitive control object, which is recovering after a short-term discharge of its capacity, are described. The main aspects of the application of the polarization index and the absorption coefficient for determining the technical state of insulation by using the coefficients characterizing the change in time of the current through the dielectric when a constant test voltage is applied to it are analyzed. The advantages of using absorption methods for monitoring the technical state of electrical insulation, first of all, are the ability to carry out testing without the necessity of applying of relatively high test voltages, which greatly simplifies all the necessary technical operations. Such control methods show a significant dependence of the informative parameters used in them on the technical state of insulation on the degree of development of slow polarization processes in the material under study and, therefore, are successfully used to determine the degree of moisture in tested electrical insulation.

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