Algorithm for calculation of reliability indicators based on monitoring of technical condition parameters

2021 ◽  
pp. 29-32
Author(s):  
M. N. Kostomakhin ◽  
A. N. Voronov
Keyword(s):  
Technical Condition ◽  
Reliability Indicators ◽  
Farm Vehicles ◽  
Definition Of

Material by definition of local indicators of reliability of self-propelled farm vehicles, on the basis of monitoring of the controlled resource parameters used for definition of technical condition of the equipment is presented in article. The main dependences when calculating local indicators of a resource are given, examinees of cars/knots/interfaces.

OPERATIONAL ASSESSMENT OF THE LIMIT STATE OF TRACTOR UNITS WITH THE USE OF INDICATOR COUNTERS

2021 ◽  
Vol 3 (144) ◽  
pp. 12-21
Author(s):  
Nikolay A. Petrishchev ◽  
◽  
Mikhail N. Kostomakhin ◽  
Aleksandr S. Sayapin ◽  
Igor’ M. Makarkin ◽  
...  
Keyword(s):  
Limit State ◽  
Technical Condition ◽  
Point Of View ◽  
Research Purpose ◽  
Diagnostic Tools ◽  
Diagnostic Process ◽  
Technical Documentation ◽  
Limit States ◽  
Limit Condition ◽  
Reliability Indicators

In accordance with GOST 20793-2009, the tractor and its components are subjected to resource diagnostics before maintenance. The technical condition of the components of the tractor or machine should be checked with the use of control and diagnostic equipment. Currently, the criteria for the limit state are significantly outdated and require revision from the point of view of tightening modern requirements for operational and economic characteristics and reliability indicators. (Research purpose) The research purpose is in analyzing the state of the issue and the current regulatory documentation and making proposals for remote monitoring of the criteria for the limit states of individual components and aggregates. (Materials and methods) The article presents an analysis of scientific and technical documentation, State standards of the Russian Federation and scientific papers on the problems of minimizing technological risks, diagnostics and control suitability for determining the maximum technical condition, and staged studies on the possibility of monitoring the operation of individual components and units online. The article notes the need to adjust the criteria for the maximum technical condition in accordance with the new designs of resource-determining units, aggregates and existing technical regulations. (Results and discussion). The article presents the justification of the diagnostic process and identified contradictions in the design of tractors and existing scientific and technical documentation and standards, and proposed option of using meters-identifiers when upgrading tractors as a system of built-in online diagnostic tools. (Conclusions) Timely, automated monitoring of the technical condition of tractors, which is based on comparing data with the criteria of the limit condition, serves as a justification for the effective operation of equipment with built-in devices for diagnostics, which allows minimizing agrotechnological risks.

scholarly journals Stochastic models for ensuring parametric reliability of the construction machines

2021 ◽  
pp. 262-273
Author(s):  
Galyna Getun ◽  
Vitalii Les'ko ◽  
Iryna Bezklubenko ◽  
Olena Balina ◽  
Yurii Butsenko
Keyword(s):  
Methodological Approach ◽  
Hydraulic Drive ◽  
Hydraulic Cylinder ◽  
Technical Condition ◽  
Technical Problems ◽  
Reliability Models ◽  
Reliability Indicators ◽  
Hydraulic Machines ◽  
Parametric Reliability ◽  
Analysis Of Failures

The solution of technical problems to ensure the working capacity is largely determined by the effectiveness of theoretical and applied developments in an area of estimation and prediction of their reliability indicators. An effective approach to the analysis of failures and the development of operability and parametric reliability models provides an opportunity to obtain more adequate models of reliability of hydraulic drives of machines, as they more fully take into account the specifics of the structure and functioning of the hydro drive elements of construction machines, their relationships and features of the formation of parameters failures. And this will allow to get more real and accurate results of estimation of reliability indicators of hydraulic drives of both construction and other hydraulic machines. They do not exhaust all possible variants of models that can take place when analyzing the reliability of hydraulic drives of machines, but at the same time they to a certain extent extend and refine the set of known reliability models. Specific in terms of formation of parametrical failures are such consistently connected in terms of the layout of hydraulic elements, as working sections of hydraulic distributors and hydraulic cylinders, which are part of the subsystems of GPs and form the so-called functional areas (FA). Reaching the FA limit is a compatible result of the combined random process of evolution of the volumetric efficiency JCUA  these elements, and the technical condition of the FA is estimated to be generalized by the JCUA, which equals the product of the JCUA of consecutively connected elements: . In this case, the probability of maintaining the capacity of the FA will be: . The processing of diagnostic information and the study of the reliability of GPs in real conditions of their operation showed that the distribution of JCUD hydraulic elements with a sufficient degree of consistency can be described under several theoretical laws. It is considered when the JCUA sections of the hydraulic distributor and hydraulic cylinder are distributed by gamma distribution and exponential distribution. The use of the general methodological approach to the analysis of failures and the construction of models of operability and parametric reliability provides an opportunity to obtain more adequate models of reliability of hydraulic drives of machines, as they more fully take into account the specifics of the structure and functioning of the hydraulic drive elements, They don't exhaust all possible models that can take place when analyzing the reliability of hydraulic drives, but at the same time they are to some extent expanding and refining the range of already known models of reliability.

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 VARIABILITY MANAGEMENT OF EFFICIENT VEHICLE OPERATION BASED ON FUNCTIONAL RESONANCE ANALYSIS METHOD

2021 ◽  
pp. 80-88
Author(s):  
O.P. SAKNO ◽  
T.M. KOLESNIKOVA
Keyword(s):  
Traffic Safety ◽  
Block Diagram ◽  
Good Condition ◽  
Technical Condition ◽  
Technical System ◽  
Analysis Method ◽  
Resonance Analysis ◽  
Maintenance Work ◽  
Technical Operation ◽  
Definition Of

Raising of problem. The methodology presented in this study is aimed at modeling the variability of the technical condition when operating a car in a complex social and technical system "car − person − environment". This allows you to simulate the change in the operational properties of the car depending on its operation, affecting the change in the technical condition by the Functional Resonance Analysis Method (FRAM). Purpose. The variability of the technical operation of the car needs to be managed, and not reduced or eliminated, since this is an advantage, as well as conditions for the safety and functioning of complex socio-technical systems. To control it, you must first monitor the variability of the vehicle's technical operation. A set of relevant indicators needs to be identified and developed. Their interpretation makes it possible to draw conclusions about the level of technical condition, operational properties of the vehicle and traffic safety and supports the prediction of the occurrence of future events (failure occurrence). Conclusion. Thus, the basic principles of the FRAM for modeling the variability of the technical condition when operating a car in a complex social and technical system "car − person − environment" have been determined. The relationship has been established between the definition of traffic safety, the FRAM model and the performance indicators of the vehicle. The developed model of the FRAM for maintenance of the undercarriage of cars, consisting of a set of functions that describe the actions taken to maintain cars to ensure their good condition. A block diagram of the implementation of functionally oriented technologies for the maintenance and repair of cars has been developed, taking into account the design features and the level of technology for technical influences. This allows you to objectively determine the required scope of maintenance work, depending on the results of diagnostics and the availability of technological equipment.

scholarly journals From Matrix to Operator Inequalities

2012 ◽  
Vol 55 (2) ◽  
pp. 339-350 ◽  
Author(s):  
Terry A. Loring
Keyword(s):  
Technical Condition ◽  
Monotone Functions ◽  
Bounded Operators ◽  
Operator Inequalities ◽  
Residually Finite ◽  
Finite Dimensional ◽  
Operator Monotone ◽  
Noncommutative Polynomials ◽  
Definition Of

AbstractWe generalize Löwner's method for proving that matrix monotone functions are operator monotone. The relation x ≤ y on bounded operators is our model for a definition of C*-relations being residually finite dimensional.Our main result is a meta-theorem about theorems involving relations on bounded operators. If we can show there are residually finite dimensional relations involved and verify a technical condition, then such a theorem will follow from its restriction to matrices.Applications are shown regarding norms of exponentials, the norms of commutators, and “positive” noncommutative ∗-polynomials.

scholarly journals MODEL OF AN ESTIMATION OF A RESOURCE OF TRACTION TRANSFER OF A MOTOR CARLOAD ROLLING STOCK

2015 ◽  
Vol 2 (158) ◽  
Author(s):  
Aleksandr Babanin ◽  
Sergiy Yarovoy ◽  
Vadim Bulba
Keyword(s):  
Life Cycle ◽  
Service Life ◽  
Motor Block ◽  
Technical Condition ◽  
Normal Operation ◽  
Rolling Stock ◽  
Definition Of ◽  
Analytical Expressions

In clause questions of definition of a resource of the wheel motor block traction transfer of a motorcarload rolling stock are considered. Problems of forecasting of a technical condition of responsible units oftraction transfer are certain. The model of deterioration in which the periods extra earnings are allocated,normal operation, intensive deterioration and prolongation of service life of the wheel motor block of amotor carload rolling stock is formalized for weigh his life cycle. For each allocated period meetingdependences of speed and intensity of deterioration are offered. According to dependences calculations arelead and analytical expressions of wear of points of cog-wheels of power reducing of traction transfer whichallow to predict his resource in operation are received.

Managing the Safety Level of Buildings and Structures

2018 ◽  
Vol 931 ◽  
pp. 238-242
Author(s):  
Yuriy I. Zayarov ◽  
Yuri V. Pimshin ◽  
Sergey M. Burdakov
Keyword(s):  
Technical Condition ◽  
The State ◽  
Value Assessment ◽  
Safety Level ◽  
Geometric Characteristics ◽  
Internal Geometry ◽  
Definition Of ◽  
Building Stability

With the introduction of the Russian laws on the definition of safety in use of buildings and structures, it became necessary to develop criteria (coefficients) for estimating these states. One of the known approaches to assessing the safety of buildings is based on the analysis of geometric characteristics. However, currently, there are no criteria that would ensure the solution of this problem. It is required to develop these characteristics. In this research, we offer an approach to the designation of such criteria. This proposal for assessing the technical condition of buildings, the coefficients of internal geometry and building stability, providing a single-value assessment of the state of the object in terms of safety of its use.

scholarly journals Management of the “building-base system” action, using a life cycle model

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Justyna Sobczak-Piąstka ◽  
Oksana Kichaeva ◽  
Pavlo Firsov ◽  
Sergey Zolotov ◽  
Yuriy Famulyak
Keyword(s):  
Life Cycle ◽  
Technical Condition ◽  
System Management ◽  
Technical Solution ◽  
Base System ◽  
Reliability Indicators ◽  
Current State ◽  
Proposed Model ◽  
Before And After

AbstractThis research aims to highlight the problem of creating various models that reflect the life cycle of the “building-base” system, and link the reliability of this system with its technical condition. Based on the proposed model of the life cycle “reconstructed building-base”, it is possible to regulate the condition of the building towards its restoration, changing the category of technical condition to higher and obtain new, adequate to the current state, reliability indicators. During the operation of this model, it is possible to control the system management on the basis of the obtained quantitative values of reliability. The result of the reliability calculation is the determination of such a technical solution of strengthening the “building-base” system, which will provide a given level of reliability. The research provides an example of the calculation of an operable monumental building before and after its restoration.

scholarly journals RESEARCH OF THE OPERATIONAL DEPENDABILITY OF THE LADA KALINA VEHICLE SYSTEMS AFFECTING TRAFFIC SAFETY

Dependability ◽  
2017 ◽  
Vol 17 (4) ◽  
pp. 31-35
Author(s):  
I. V. Denisov ◽  
A. A. Smirnov
Keyword(s):  
Traffic Safety ◽  
Road Safety ◽  
Design Theory ◽  
Technical Condition ◽  
The Road ◽  
Warranty Period ◽  
Reliability Indicators ◽  
Operation Conditions ◽  
Vladimir Oblast ◽  
Primary Test

The growing number of cars in the Russian Federation means that a large number of vehicles with different performance indicators get involved in the transportation process. One of those indicators is dependability that is a key characteristic of quality. A vehicle’s operation is the primary test of its dependability, of which the indicators depend on the used design solutions and the manufacturing process. Defects occurring at various stages of vehicle manufacture significantly affect the dependability indicators. It must be noted that a vehicle is a source of increased hazard. A failure of a vehicle in operation due to a manufacturing defect or nonobservance of operation conditions may cause an accident. Therefore it is extremely important to have at one’s disposal information on the implemented systems reliability indicators that affect active safety. In this context, the research of automotive vehicles dependability in operation is a relevant scientific task, solving which will enable managing the technical condition of vehicles and ensure traffic safety.The aim of this research was to evaluate the operational dependability of the systems that directly affect the road safety of Lada Kalina with subsequent use of the obtained information in the development of automated systems for management of automotive vehicle technical condition in operation.The methods of research are based on the theoretical foundations of vehicle maintenance, the probability theory and mathematical statistics, experimental design theory. Standard methods of processing of statistical information on the operational dependability of vehicles were used. The data was obtained from official OAO AvtoVAZ dealerships in the Vladimir Oblast. As the result of research of the operational dependability of the systems that directly affect the road safety of Lada Kalina a list of defective components in the steering, braking, chassis, lighting and signalling systems was identified. Times to failure of parts, units and assemblies that limit the vehicle dependability, as well as the primary numerical characteristics of random distribution were determined. The defects identified at early stages of operation indicate design and manufacturing flaws of Lada Kalina.Conclusions: In this paper the authors present the findings regarding the defects of the Lada Kalina systems that directly affect traffic safety. This information was obtained by means of analyzing vehicle failures within the warranty period that were recorded based on the owners’ applications to the OAO AvtoVAZ dealerships an maintenance facilities in the Vladimir Oblast. Maintenance facilities, when performing diagnostic operations as part of routine maintenance, should take into consideration the list of the least dependable vehicle components given in this paper and directly affecting the traffic safety. The manufacturing factory should take note of the indicated defects and develop a plan of their elimination, as well as timely inform the consumers of the identified warranty-specific defects and recall the products.

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