scholarly journals EXPERIENCE IN THE APPLICATION OF ADAPTIVE STRATEGIES FOR MAINTENANCE AND REPAIR OF MILITARY PRODUCTS IN NATO MEMBER COUNTRIES

2021 ◽  
pp. 101-111
Author(s):  
P. Openko ◽  
V. Polishchuk ◽  
M. Mуronіuk ◽  
A. Kozyr
Keyword(s):  
Service Life ◽  
Positive Impact ◽  
Armed Forces ◽  
Adaptive Strategies ◽  
Technical Condition ◽  
Practical Implementation ◽  
Limit Condition ◽  
Maintenance And Repair ◽  
Military Equipment ◽  
Current State

Maintenance of armaments and military equipment, implementation of a set of measures to maintain armaments and military equipment in working order are related to the need to solve the problem of ensuring the specified indicators of their efficiency, especially samples with long service life. Given the current state of the domestic armaments and military equipment park, it is important to study the experience of NATO member states in implementing adaptive maintenance and repair strategies, including maintenance and repair strategies. The aim of the article is to analyze the current state of use of adaptive strategies for maintenance and repair of weapons and military equipment in the world's leading countries with further substantiation based on its recommendations for their practical implementation during the organization of their operation in the Air Force of Ukraine. According to the results of research, a positive impact of the application of maintenance and repair strategy, including by solving the problem of minimizing the cost of operation of weapons and military equipment. As a result, substantiated and proposed the necessary conditions for the application of the strategy of their maintenance and repair, which are in service with the Armed Forces of Ukraine in technical condition, the implementation of which as an alternative to the use of service life (resource) of relevant samples control of the limit condition or the need for maintenance and repair of the product, which are accepted as a result of continuous (periodic) control of the parameters that determine the technical condition.

scholarly journals And probabilistic model to calculate on-the-dejnosti nodes and interfaces of the manipulator

2017 ◽  
Author(s):  
Н.А. Сидоренков ◽  
Б.Г. Мартынов
Keyword(s):  
Service Life ◽  
Operational Reliability ◽  
Technical Condition ◽  
Optimal Frequency ◽  
Maintenance And Repair ◽  
Reliability Models ◽  
Warranty Period ◽  
Hydraulic Manipulators ◽  
Statistical Studies ◽  
Proactive Maintenance

Во время эксплуатации гидроманипуляторов (ГМ) возникает задача продления жизненного цикла ГМ. В настоящее время он составляет при полной нагрузке ГМ от 3 до 5 лет или 6000 моточасов до капитального ремонта. В зависимости от условий работы и обслуживания этот ресурс, по данным ПО «Подъемные машины», может быть израсходован за 8 мес. Руководством по эксплуатации ГМ определены пять видов ТО: ЕТО и четыре номерных. Причем в гарантийных обязательствах определен период работы ГМ до первого отказа. Он соответствует примерно 120 моточасам. Для продления срока службы ГМ до капитального ремонта необходимо перейти от обычной планово-предупредительной системы ТО и ремонта к проактивной системе. Основу проактивной системы ТО и Р составляет правильное управление техническим состоянием механизма с целью повышения его эксплуатационной надежности, определения оптимальной периодичности ТО и Р, что в свою очередь требует полной информации о техническом состоянии механизма и надежности его узлов и сопряжений. Цель проактивной системы ТО и Р – предупреждать отказ узлов и сопряжений механизма. Для реализации этой цели необходима разработка модели надежности ГМ и проведение статистических исследований отказов элементов механизма. Поэтому данная задача является актуальной. В настоящей статье приводится выражение, которое позволит формировать стратегию обслуживания данного типа манипуляторов для продления их срока службы. Цель исследования – разработка вероятностной модели надежности узлов и сопряжений ГМ для решения одной из задач управления техническим состоянием механизма с целью обоснования проактивной системы ТО и Р. During operation of hydraulic manipulators (GM), there arises the problem of extending the life cycle of the GM. Currently, it is under full load UM from 3 to 5 years or 6000 hours before overhaul. Depending on the conditions of operation and maintenance of this resource, according to «Lifting machines», can be used for 8 months. The user manual for the GM identifies five kinds: UTB and four plates. And in a warranty period defined by the work of the GM until the first failure. It corresponds to about 120 hours. To extend the service life of the GM overhaul need to move from conventional preventive system of maintenance and repair to a proactive system. The basis for proactive maintenance and R is the correct management of the technical condition of the mechanism with the purpose of increasing its ex-operational reliability, determining the optimal frequency and R, which in turn requires full information about the technical condition of the mechanism and reliability of its components and interfaces. The purpose of proactive maintenance and repair – to prevent failure of the nodes and interfaces of the mechanism. To achieve this goal it is necessary to develop reliability models of the GM and carrying out statistical studies of failures of elements of the mechanism. Therefore, this task is urgent. In this paper, we provide an expression that will form the servicing strategy for this type of manipulators to extend their service life. The purpose of the study: the development of probabilistic reliability models of the nodes and interfaces of GM to address one of the problems of control of technical condition of the mechanism in order to justify the proactive maintenance and R.

scholarly journals ON POSSIBLE FUNCTIONAL COMPONENTS OF THE INFORMATION SYSTEM OF ARMS AND MILITARY EQUIPMENT TESTING OF THE ARMED FORCES OF UKRAINE

2020 ◽  
pp. 52-61
Author(s):  
I. Korniienko ◽  
S. Korniienko ◽  
D. Kamak ◽  
S. Kaznachey ◽  
O. Zhyrna
Keyword(s):  
Information System ◽  
Technical Information ◽  
Armed Forces ◽  
Test Facility ◽  
Practical Implementation ◽  
Special Equipment ◽  
Military Equipment ◽  
Software Modules ◽  
Specialized Institutions ◽  
Functional Components

Today, the problem of ensuring the effectiveness of the system of testing weapons and military equipment remains relevant. According to the existing national legislation and the accepted standards, separate specialized institutions are involved in the testing of samples of armaments and military equipment. One of the methods of improving the efficiency of test centers and institutions is the automation of all processes that accompany the testing of samples of weapons, military equipment and special equipment. The article highlights the approaches to the design and practical implementation of the information system to support the testing of weapons and military equipment. Its possible functional composition is considered. It is assumed that the information system should automate all processes in the test facility that are somehow related to the tests.Based on the analysis of existing guidance documents and scientific and technical information sources, the composition of the main functional components of the information system of test support is proposed. The necessity of introducing a management component into the information system for the implementation of a targeted approach to the management of a testing facility is substantiated. Reclassification of tasks of information databases on stages of carrying out tests is done. Based on the generalized scheme of testing the conceptual model of information system of support of tests is offered.The approximate composition of individual software modules and the content of databases are given.The expediency of using a spiral model of software design for the development of a comprehensive full-featured information system for test support is substantiated. It is expected that the automation of planning, conducting and other processes that accompany the tests can significantly affect the overall efficiency of the organization and conduct of tests, ensure the proper quality of the results and help reduce time losses for testing.

The Use of the Vibroacoustic Method for Monitoring the Technical Condition of Aero Engines with Extended Time between Overhauls

2015 ◽  
Vol 220-221 ◽  
pp. 283-288
Author(s):  
Jarosław Spychała ◽  
Paweł Majewski ◽  
Mariusz Żokowski
Keyword(s):  
Operating System ◽  
Service Life ◽  
Technical Condition ◽  
Extended Time ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Current State ◽  
Turboprop Engine ◽  
Aero Engines ◽  
Non Destructive

The article presents some aspects of several years of work on the use of the vibroacoustic method (Non-Destructive Testing) for assessing a turboprop engine from a trainer aircraft. The functioning engine does not have an operating system for measuring vibration, and therefore the current levels of vibrations and its changes in trends are not known. In order to extend its service life, performing a number of works was required. On the basis of assessing the current state of the engine, opportunities for further exploitation were identified thus developing methodology for evaluating technical condition regarding the whole population. The paper shortly describes the object and equivalent tests on the engine. The article focuses on the methods prepared for extending life between overhauls required for turboprop engines and discusses the results received during their implementation.

scholarly journals RECOMMENDATIONS FOR EQUIPPING THE PROVING GROUND F OR TESTING ARMORED AND AUTOMOTIVE VEHICLES

2021 ◽  
pp. 56-62
Author(s):  
V. Kuznetsov ◽  
Y. Dobryshkin ◽  
I. Lappo ◽  
V. Zhyrnyi
Keyword(s):  
Laboratory Testing ◽  
Armed Forces ◽  
Environmental Safety ◽  
Technical Condition ◽  
Testing Equipment ◽  
Medical Support ◽  
Problem Statement ◽  
Military Equipment ◽  
Combat Training ◽  
Vital Functions

Problem statement. Equipping the Armed Forces of Ukraine with new types of armament and military equipment, including armored and automotive equipment, leads to the need to create an appropriate proving ground: the development of infrastructure facilities, equipping with tools and equipment for laboratory tests, as well as means for monitoring the performance and determining the technical condition of armament and military equipment. Analysis of recent research and publications. Unfortunately, there are no recommendations in the existing publications on equipping the proving ground for armored and automotive vehicles. Statement of the task. The purpose of the work is to improve the efficiency of testing armored and automotive vehicles. The article defines the main tasks of the proving ground, proposes a relevant composition of its elements and general requirements for them, as well as proposals for equipping it with laboratory testing equipment. To solve the assigned tasks, the proving ground should include the following main objects and systems: a test area for armored and automotive vehicles; an area for testing samples of armored and automotive vehicles for survivability; complex of common use roads, special test roads; special facilities for the placement of laboratory testing equipment; engineering networks for testing and vital functions (power supply, water supply, etc.); systems of metrological, meteorological, fire protection and medical support, environmental safety; security system. Conclusions. The creation of a proving ground for armored and automotive vehicles will provide: building capacity of a test base of the Armed Forces of Ukraine for the assessment of promising models of armored and automotive vehicles; increasing the achieved level of control over the technical state of armaments and military equipment during tests; evaluation of the results of combat training with the combat use of armament and military equipment; accreditation of the proving ground for armament and military equipment in national and international conformity assessment and certification bodies for eligibility to carry out work in accordance with NATO standards.

scholarly journals Changes in the Logistics System of the Polish Navy

2019 ◽  
Vol 217 (2) ◽  
pp. 69-79
Author(s):  
Mariusz Jankowski
Keyword(s):  
Subject Matter ◽  
Armed Forces ◽  
Technical Condition ◽  
The Other ◽  
Logistics System ◽  
Military Equipment ◽  
Other Hand ◽  
The Subject ◽  
The Republic ◽  
The Way

Abstract The aim of the article is to show the changes taking place in the structures of logistical support of the Polish Navy, focusing on the changes in the way of supplying ships of the Polish Navy. In recent years, the Polish Navy has undergone many changes in the subject matter, starting from the liquidation of the Logistics of the Polish Navy and the Polish Navy Command, including the Management of Logistics Planning. The changes contributed to the centralization of Logistics, creating the Inspectorate for Armed Forces Support of the Republic of Poland, which focused on the main burden of tasks related to, among others, repairs, modernization and supply of ships. On the other hand, it extends the time of issuing opinions on, for example, the protocols for assessing the technical condition of military equipment (ME), which are the basis for the replacement, repair or further exploitation of the ME.

How to determine the remaining life of machine parts

2020 ◽  
pp. 50-57
Author(s):  
Vyacheslav I. Chernoivanov ◽  
Vyacheslav A. Denisov ◽  
Aleksey A. Solomashkin
Keyword(s):  
Service Life ◽  
Residual Life ◽  
Interval Estimation ◽  
Probability Of Failure ◽  
Technical Condition ◽  
Research Purpose ◽  
Interval Estimate ◽  
Remaining Life ◽  
Maintenance And Repair ◽  
Machine Parts

The article presents three strategies for maintenance and repair of machines that control the pre-selected and justified parameters of the technical condition of the machine, as well as the costs of eliminating failures for these strategies and the possibility of reducing them. (Research purpose) The research purpose is to identify the most effective way to determine the residual life of machine parts. (Materials and methods) The article proposes a strategy for maintenance and repair of machines, in which a special place is occupied by ways of reducing the mechanical friction losses, increasing the efficiency of the machine and the service life of its parts. The article notes that in order to meet the service life, it is necessary to monitor their remaining life visually or using appropriate sensors. In order to determine the remaining resource in more accurately way, we suggested that it would be measured several times, preferably using different methods or devices. Authors designed a computer program that allows to estimate the remaining resource using an interval estimation of random values for a given probability of failure-free operation of the machine part. The plunger pairs of a high-pressure fuel pump were chosen as the object of research. As a diagnostic parameter that characterizes the technical condition of the pump, its starting cycle feed was used, the value of which was determined on different stands. (Results and discussion) Article presents the values of the average resources of the plunger pairs, their dispersion around the corresponding average values, and calculated their average residual resource as an interval estimate for a given probability of failure-free operation. (Conclusions) The research results have shown a possibility of using the residual resource as the basis of the proposed strategy for maintenance and repair of machines based on minimizing the residual resource of their parts. The most important unsolved task for this strategy remains the selection and justification of primary diagnostic sensors for assessing the residual life of machine parts.

scholarly journals SUBSTANTIATION OF APPROPRIATE OPTIONS FOR APPLICATION OF METHODS OF OBSERVABILITY ATTENUATION OF UKRAINIAN ARMED FORCES’ MILITARY EQUIPMENT, PROTECTION OF PERSONNEL AND EQUIPMENT FROM TECHNICAL MEANS OF RADIOLOCATING AND OPTICAL-ELECTRONIC INTELLIGENCE

2020 ◽  
pp. 33-40
Author(s):  
Y. Zhivetc ◽  
O. Yermolenko ◽  
V. Koval
Keyword(s):  
Electromagnetic Waves ◽  
Electromagnetic Compatibility ◽  
Electromagnetic Emission ◽  
Armed Forces ◽  
Electronic Equipment ◽  
Practical Implementation ◽  
Air Defense ◽  
Military Equipment ◽  
Absorbing Materials ◽  
Electronic Intelligence

Development of technologies for creating materials, environments and coatings with specified electrophysical characteristics for practical implementation in production and widespread use of observability attenuation technologies of surface, air, space, abovewater objects, surface-based installations, troops for the needs of Armed Forces of Ukraine and other military formations, impacts of artificial sources of electromagnetic radiation on the human body today is especially relevant. Nowadays, "stealth technologies" include the following main areas: the theory of diffraction on bodies of complex shape, research and development of radio-absorbing materials, coating technology and, finally, radiophysical experiment, which is used for control in each of these areas. One of the most important tasks is to reduce the level of signals generated by the reflection of electromagnetic waves emitted by radars, since radars still remain the most "long-range" means of detecting targets and air defense systems aiming. To date, "stealth technology" begins with mathematical modeling of electromagnetic wave scattering on an object, the radar visibility of which should be reduced. This step is essential for a preliminary assessment of the possible result and allows optimizing the shape and electrophysical characteristics of the object. The world leading countries have developed absorbing materials that capable to provide electromagnetic compatibility of the electronic equipment, camouflaging and counteraction to radio technical intelligence, use in designs of the radio electronic equipment. The comparative analysis of the developings that are promising for usage as radio-absorbing materials and radio-absorbing covering is carried out in the work. In the future, it is planned to expand the shielding frequency range and the range of use of absorbing coatings to protect personnel and equipment from electromagnetic emission.

FEATURES OF APPLICATION OF SMALL RECONNAISSANCE ROBOT

2019 ◽  
pp. 29-38 ◽  
Author(s):  
R. Zinko ◽  
P. Kazan ◽  
D. Khaustov ◽  
O. Bilyk
Keyword(s):  
Mathematical Model ◽  
Armed Forces ◽  
Climatic Conditions ◽  
Design Stage ◽  
Experimental Sample ◽  
Single Trial ◽  
Test Cycle ◽  
Military Equipment ◽  
The Mathematical Model ◽  
Human Losses

A small intelligence robot (SSR) is a special military intelligence means. It is used to obtain information about the enemy - the collection of intelligence, the search for targets and target indication, observation of the situation, etc. The use of a small intelligence robot is assumed in various natural and climatic conditions: in temperate terrain, on soils with low bearing capacity, at low temperatures, in the desert, on sandy and marshy soils, on rocky soils, in elevated temperature and dustiness of air, and also in conditions highlands In the article an overview of modern developments of remotely controlled robotic military complexes, principles of their construction and perspective directions of development in the armed forces are reviewed. The issues of robotization of existing weapons and military equipment are considered. Every sample of a SSR used in combat action must possess all combat characteristics at once in an optimal ratio between them, ensuring its maximum effectiveness. Ignoring any of the properties or enhancing one property at the expense of others will not enable the full realization of the small surveillance robot. It is reasonable to select the relevant properties at the design stage, using the possibilities of mathematical modeling. The set of tactical and technical characteristics of the SSR allowed forming this. Its characteristics determine the scope and possibilities of application. The mathematical model of the SSR motion is written in the Matlab Simulink environment. Recorded mathematical model of SSR motion, formed single test cycle and input data allowed to conduct computer simulation of motion in possible conditions of operation of small surveillance robot.The single trial cycle presented contains a set of individual sites and reproduces the testing test cycle of a real polygon. On the basis of the developed tactical and technical characteristics of the SSR, the experimental sample was made. An example of the use of SSR for the intelligence of the settlement and at keeping the node of barriers has been provided. The efficiency of performing intelligence units’ tasks and reducing the risk of human losses are shown.

Strategies of maintenance and repair of agricultural machinery

2020 ◽  
pp. 38-48
Author(s):  
Aleksey S. Dorokhov ◽  
Aleksandr V. Denisov ◽  
Aleksey A. Solomashkin ◽  
Valeriy S. Gerasimov
Keyword(s):  
Wear Rate ◽  
Technical Condition ◽  
Research Purpose ◽  
Agricultural Machinery ◽  
Maintenance And Repair ◽  
Wear Rates ◽  
Urgent Task ◽  
Machine Parts ◽  
Current Value ◽  
Agricultural Machines

Modern machines are subject to progressive wear that occurs at different rates, which leads to unpredictable failures that reduce the reliability and durability of machines. The strategy of maintenance and repair is aimed at eliminating these problems. (Research purpose) The research purpose is in analyzing the basic principles of the strategy of maintenance and repair of agricultural machinery in order to ensure control of the technical condition of machine parts. (Materials and methods) When resource diagnostics is used, , the allowable value of the parameter is set in advance for a part . This value is the tolerance that corresponds to a certain wear rate of the part. The tolerance is set based on the condition that if the current value of the controlled resource parameter during the next diagnosis is less than the set value, then such a part at the current value of the wear rate can be finalized until the next inter-control check. Taking into account the wear rate of the same type of parts from the group when determining the allowable wear during their resource diagnostics becomes an urgent task. (Results and discussions) As a result of research, the article presents "Methodology for determining the main indicators of reliability of parts of agricultural machines with different wear rates" and "Methodology for determining the tolerance system of parts of agricultural machines with different wear rates". (Conclusions) The article presents the tolerance system that reduces the probability of failure of machine parts in operation. During resource diagnostics, those parts whose resource parameters exceed the tolerance are rejected.

scholarly journals Transcription Alignment of Historical Vietnamese Manuscripts without Human-Annotated Learning Samples

2021 ◽  
Vol 11 (11) ◽  
pp. 4894
Author(s):  
Anna Scius-Bertrand ◽  
Michael Jungo ◽  
Beat Wolf ◽  
Andreas Fischer ◽  
Marc Bui
Keyword(s):  
Object Detection ◽  
State Of The Art ◽  
Positive Impact ◽  
Detection System ◽  
Training Data ◽  
Detection Accuracy ◽  
Current State ◽  
Alignment Task ◽  
Scanned Image ◽  
Automatic Transcription

The current state of the art for automatic transcription of historical manuscripts is typically limited by the requirement of human-annotated learning samples, which are are necessary to train specific machine learning models for specific languages and scripts. Transcription alignment is a simpler task that aims to find a correspondence between text in the scanned image and its existing Unicode counterpart, a correspondence which can then be used as training data. The alignment task can be approached with heuristic methods dedicated to certain types of manuscripts, or with weakly trained systems reducing the required amount of annotations. In this article, we propose a novel learning-based alignment method based on fully convolutional object detection that does not require any human annotation at all. Instead, the object detection system is initially trained on synthetic printed pages using a font and then adapted to the real manuscripts by means of self-training. On a dataset of historical Vietnamese handwriting, we demonstrate the feasibility of annotation-free alignment as well as the positive impact of self-training on the character detection accuracy, reaching a detection accuracy of 96.4% with a YOLOv5m model without using any human annotation.

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