scholarly journals On one criterion for estimating technical condition of a mining machine reducing gear

2021 ◽  
Vol 330 ◽  
pp. 02003
Author(s):  
Pavel Gerike ◽  
Boris Gerike
Keyword(s):  
Technical Condition ◽  
Mining Machine ◽  
Compelling Evidence ◽  
Testing Facility ◽  
Reducing Gear ◽  
Technical Systems

The developed Procedures for estimating technical condition of mining machines reducing units based on reference spectral masks got approval at the producer’s plant during run-in test at the testing facility and in industries. The approval results of the introduced criterion bear compelling evidence about the rectitude of the chosen approach for diagnosing sophisticated technical systems.

Probabilistic Analysis of Intermediate Floor Steel and Wooden Structures in the Old Urban Development Building

2014 ◽  
Vol 633-634 ◽  
pp. 1140-1147
Author(s):  
Vladimir Alekseevich Sokolov
Keyword(s):  
Information Theory ◽  
Urban Development ◽  
Probabilistic Analysis ◽  
Technical Condition ◽  
Probabilistic Methods ◽  
Technical Diagnostics ◽  
Structural Elements ◽  
Complex Technical Systems ◽  
Technical Systems ◽  
Wooden Structures

The article suggests an approach to determine structural elements technical condition, based on the mathematical probabilistic apparatus of technical diagnostics. Diagnostics are performed using probabilistic methods of complex technical systems conditions recognition. Probabilistic parameters are calculated according to Bayes’s rule. The paper shows a diagnostics example of intermediate floor elements and systems in the old urban development building. Both the suggested method and information theory methods are used during diagnostics.

Risk Management at Operation of Dangerous Technical Systems on the Basis of Non-Destructive Control

2020 ◽  
Vol 9 (1) ◽  
pp. 20-27
Author(s):  
Vladimir Akatev ◽  
E. Metelkin ◽  
E. Barysheva ◽  
A. Akat'ev
Keyword(s):  
Risk Management ◽  
Risk Mitigation ◽  
Minimum Cost ◽  
Technical Condition ◽  
Mitigation Measures ◽  
Long Distance ◽  
Management Algorithm ◽  
Level Increase ◽  
Technical Systems ◽  
Non Destructive

Questions related to accidents prevention based on non-destructive control of critical defects, functioning dangerous technical systems with high wear levels, as well as to substantiation of measures for step-by-step risk mitigation of the specified systems after their stop have been considered. For security upgrade relating to operation of potentially dangerous technical systems under resources restrictions are applied measures for prevention of accidents, mainly, the non-destructive control (NDC) of these systems technical condition without their stop. So, complexes of NDC-methods are applied for fault detection of functioning long distance pipe lines and industrial chimneys. The defects elimination process, and recovery works on the stopped idle systems can be considered as stage-by-stage risk management implementation. With increase of specified measures’ costs the accidents damage risk mitigation is reached. At the same time modified to year expenses representing the sum of presented expenditures related to risk mitigation measures and the presented accidents damage at some cost value for risk mitigation take up minimum value. Further expenses level increase with minimum cost is not compensated by the level of prevented damage. Searching of the specified expenses level for accidents risk mitigation with minimum cost is an optimization problem on minimization of the modified to year risky expenses. In this work has been offered a risk management algorithm scheme at operation of such potentially dangerous technical system as a functioning industrial reinforced concrete flue.

scholarly journals Application of diffusion-non-monoton distribution to model the radio-electronic equipment operation process

2019 ◽  
Vol 9 (6) ◽  
Author(s):  
Volodymyr Mirnenko ◽  
Petro Yablonsky ◽  
Sergii Kitik
Keyword(s):  
Technical Condition ◽  
Spare Parts ◽  
Theory And Practice ◽  
Electronic Equipment ◽  
Analytical Relationship ◽  
Physical Parameters ◽  
Degradation Processes ◽  
Reliability Indicators ◽  
Technical Systems ◽  
Quantitative Indicators

The emergence of reliability as an applied mathematical discipline is associated with the 50-60 years of the last century, when large and complex technical systems began to be created in various branches of technology. In this regard, an acute reliability problem arose, that is, ensuring the functioning and operability of these complex and expensive systems. The whole variety of reliability studies is aimed at solving the following three problems: assessment and prediction of product reliability at the design stages (a priori methods); experimental evaluation of reliability indicators, that is, confirmation of the projected level of reliability according to the results of tests or operation (posterior methods); taking measures to achieve and ensure a given level of reliability by optimizing the maintenance strategy, redundancy, spare parts, etc. (optimization problems) The traditional has developed a certain division in the areas of theory and practice of reliability of machines (mechanical objects, technical systems containing mechanical components) and equipment (electronic products, technical devices containing electronic and radio elements). The main tasks of reliability of machines and equipment - the establishment of patterns of failure and the assessment of quantitative indicators of reliability - can be solved in two different ways. To date, the direction based on the use of only probabilistic concepts (purely probabilistic theory) has received the greatest development in the theory and practice of reliability. The second way to establish quantitative indicators of reliability, in contrast to a purely probabilistic approach, is based on the study of mechano-physico-chemical properties and some physical parameters of products characterizing the technical condition of the latter using probabilistic methods. The methodology for establishing quantitative reliability indicators based on the study of certain physical parameters characterizing the technical condition of products consists in identifying the kinetic laws of degradation processes (building mathematical models of degradation processes) and determining the analytical relationship between these laws and reliability indicators. The article discusses the use of diffusion-nonmonotonic distribution for modeling the process of operation of electronic equipment. Particular attention is paid to the determination of point estimates of distribution parameters based on the results of operational observations.

scholarly journals Promising model range career excavators operating time assessment in real operating conditions

2020 ◽  
Vol 242 ◽  
pp. 228 ◽  
Author(s):  
Sergey IVANOV ◽  
Polina IVANOVA ◽  
Sergey KUVSHINKIN
Keyword(s):  
Good Condition ◽  
Operating Time ◽  
Mining Industry ◽  
Negative Influence ◽  
Technical Condition ◽  
Operating Conditions ◽  
Economic Losses ◽  
Mining Machine ◽  
Mining Equipment ◽  
Detailed Assessment

The development prospects of the mining industry are closely related to the state and development of modern mining machinery and equipment that meet the technical and quality requirements of mining enterprises. Enterprises are focused on a quantitative assessment – the volume of mineral extraction, depending on the functioning efficiency of a promising series of mining machines, which include modern mining excavators. Downtime and unplanned shutdowns of mining excavators directly depend on the operating conditions of the mining machine, which has negative influence on the machine as a whole and its technical condition, which entails a decrease in the efficiency of using expensive mining equipment and economic losses of the mining enterprise. The rationale for external factors that affect the operating time and technical condition of mining excavators is given. For a more detailed assessment of the influence of external influences on the efficiency of operation of mining machines, the influencing factors are divided into two groups: ergatic, directly related to human participation, and factors of a natural-technogenic nature, where human participation is minimized. It was revealed that factors of a natural-technogenic nature have the greatest influence. An algorithm is proposed for a comprehensive assessment of the technical condition and forecasting of operating time both in nominal and in real operating conditions, taking into account factors of a natural and technogenic nature. It is proposed, based on the developed program for planning and evaluating the life of a mining excavator, to adjust the schedules for maintenance and repair (MOT and R) in order to minimize the number of unplanned downtime of a mining excavator and maintain it in good condition.

scholarly journals Criteria Justification for Assessing the Technical Condition of Gearboxes of Mining Machines Based on Infrared Thermography

2020 ◽  
Vol 174 ◽  
pp. 03003 ◽  
Author(s):  
Evgeniy Kuzin ◽  
Boris Gerike ◽  
Vitaliy Shachmanov
Keyword(s):  
Heat Release ◽  
Theoretical Basis ◽  
Technical Condition ◽  
Operating Conditions ◽  
The Body ◽  
Mining Machine ◽  
Belt Conveyor ◽  
Actual Load ◽  
Early Failures ◽  
Complex Technical Systems

The paper presents the relevance of advanced assessment of the technical condition of complex technical systems. One of which is the gearbox of a mining machine. The main reasons for early failures of bearings are shown. The main share is occupied by problems of lubrication, incorrect installation and maintenance. The analysis of types of destruction of gears of mining machines is presented. The main share is occupied by the surface coloring of the teeth and sudden fracture of the tooth as a result of dynamic load. The theoretical basis for determining the heat release of bearings is given. The calculation of heat release is given of a shaft belt conveyor gearbox as an example, which is confirmed by thermographic studies under operating conditions. Justification of criteria for evaluating the technical condition of gearboxes of mining machines in the form of temperature anomalies recorded on the surface of the body, The actual load on the output shaft is taken into account.

scholarly journals System based approach to the design of tension sensing element made of modified diamond

2020 ◽  
Vol 23 (6) ◽  
pp. 84-100
Author(s):  
S. V. Dianov ◽  
V. M. Novichkov
Keyword(s):  
Quantum Computer ◽  
Basic Research ◽  
Technical Condition ◽  
Quantum Computers ◽  
Quantum Processes ◽  
Sensing Element ◽  
Practical Applications ◽  
Complex Functions ◽  
Deductive Method ◽  
Technical Systems

Modern and perspective tasks of robotics with control from artificial intelligence systems require the use of small-sized measuring devices. In this case, the intensively developed quantum sensors and quantum computers have a bright prospect. Their main advantage is the ability to successfully process the data of random processes with decomposition of complex functions into simple multipliers, as well as their small size and the ability to transmit data over long distances without wires. Data transmitted over quantum communication lines cannot be copied or intercepted, which is very useful for remote control of complex technical systems. Based on the results of the analysis of probabilistic noisy data quantum computer is able to quickly develop an assessment of the technical condition of the complex system. At the same time, there is no need to go through all the possible solutions to the evaluation problem with a huge amount of input data, some of which can sometimes be undefined. The main problem in the research of quantum processes is that researchers study the processes occurring in materials, but they do not indicate the ways in which quantum sensors and quantum computers are used in practical applications. This article explains how to form a measuring transformer that will be compatible with a quantum computer. The main objective of the study was to bring the results of basic research in the field of quantum computing closer to their application in applied tasks. It is shown how quantum processes can be shifted to the field of technical measurements of physical quantities used in complex systems. In the process of obtaining the results of the study, the hypothetical deductive method and the method of ascent from the abstract to the concrete within the framework of a systematic approach to the development of elements of technical systems were used. The result is a description of the processes of designing of tension sensing element made of modified diamond. The main findings of the study include the fact that quantum sensors implemented in the form of a modified diamond crystal are well described by the theory of measuring transducers with frequency output and can be used to get data about the state of an object.

scholarly journals Methods of analysis of possible states of the object diagnosis.

2021 ◽  
Vol 24 (1) ◽  
pp. 33-38
Author(s):  
VAZHYNSKYI A. ◽  
◽  
ZHUKOV S. ◽  
Keyword(s):  
Flaw Detection ◽  
Technical Condition ◽  
Measuring System ◽  
Diagnostic Tools ◽  
Technical Diagnostics ◽  
Information Measuring ◽  
Other Information ◽  
Complex Technical Systems ◽  
Technical Systems ◽  
Diagnostics System

The development of new methods of technical diagnostics is an important task aimed at improving the efficiency and safety of the operation of industrial equipment. Such methods are complexes of jointly used methods for obtaining diagnostic information, methods for extracting from it the actual data on the technical state of the diagnosed objects, and methods for organizing diagnostic processes. Complex technical systems are characterized by complex nonlinear interactions between their constituent elements, complex scenarios of causal relationships between hazardous, probabilistic events and processes occurring during their operation. These scenarios can be implemented in complex scenario trees. Features of technical diagnostics of complex technical systems are determined by the distinctive properties of failures in such systems and scenarios. The technical diagnostics system is an information-measuring system and contains sensors of controlled parameters, communication lines with an information collection unit, executive devices, devices for interfacing with other information-measuring and control systems. Methods of technical diagnostics serve as the basis for constructing such a system. The current level and prospects for the development of diagnostic tools, flaw detection and automated control open real possibilities of using methods of maintenance and repair of equipment by a technical condition. The greatest effect from the use of such a system is achieved when operating complex equipment, preventive repair of which is associated with high costs, and emergency repair.

scholarly journals SEARCH METHODS IN THE STRATEGY OF OPERATING HIGH-DUTY TECHNICAL SYS-TEMS

2020 ◽  
pp. 72-84
Author(s):  
G.B. Digo ◽  
◽  
N.B. Digo ◽  
Keyword(s):  
Random Processes ◽  
Technical Condition ◽  
External Factors ◽  
Lack Of Information ◽  
Search Optimization ◽  
Decision Making Problem ◽  
Technical Systems ◽  
The Impact ◽  
Derivatives Of ◽  
Regular Patterns

nical systems. Discussed are the difficulties in estimating and predicting their technical condition, that are caused by the lack of information about regular patterns of random processes of parametric varia-tion, unavailability or lack of information about disturbing effects and the impact of external factors on the ongoing processes. The authors demonstrate feasibility of reducing the method of controlling the operation of unique high-duty technical systems to the decision-making problem under conditions of uncertainty with a guaranteed result. The application of search optimization algorithms that do not use information about the derivatives of optimized functions and allow parallelization of computation-al processes is considered.

ESTIMATION CRITERIA OF RELIABILITY AND TECHNICAL CONDITION OF HYDRAULIC ENGINEERING CONSTRUCTIONS

2011 ◽  
Vol 1 (2) ◽  
pp. 105-108 ◽  
Author(s):  
S. V EVDOKIMOV ◽  
T. V DORMIDONTOVA
Keyword(s):  
Technical Condition ◽  
Hydraulic Engineering ◽  
Complex Technical Systems ◽  
Technical Systems

Here are considered the basic estimation criteria of the reliability and technical condition of hydraulic engineering constructions. The basic methods of the estimation and calculation of the reliability of complex technical systems are analyzed. Conclusions are drawn and recommendations how to use these methods are offered with reference to hydraulic engineering objects and constructions.

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