The concept of operational readiness of a multifunctional technical system based on creating individual maintenance models of its components

2021 ◽  
Author(s):  
D.G. Zerkin ◽  
K.A. Tsybakin ◽  
Y.A. Shibanov
Keyword(s):  
Preventive Maintenance ◽  
Technical Condition ◽  
Technical System ◽  
Technical State ◽  
Repair System ◽  
Diagnostic Systems ◽  
Maintenance And Repair ◽  
Operational Readiness ◽  
Situational Management ◽  
Technical Systems

The scheduled preventive system of weapon maintenance and repair currently in use in the Armed Forces of the Russian Federation does not adequately correspond to the engineering level of modern multifunctional technical systems. This maintenance and repair system allows assessing the technical condition of multifunctional technical systems with the established diagnostic level, but does not allow predicting their short- and medium-term technical condition. As a result, there is a lack of complete information on the actual technical condition of multifunctional technical systems, which increases the risk of their inoperability at the time of intended use. In addition, the inability to predict the operability of multifunctional technical systems prevents timely detection and anticipation of failures and malfunctions. This leads to unplanned inoperability by reducing the alert readiness rate, and as a consequence, to significant corrective and preventive maintenance costs. Analysis of the technical conditions of multifunctional technical systems shows that the existing preventive maintenance and repair system makes it increasingly more difficult to ensure the required level of the specified operational and technical characteristics. The development and implementation of built-in automated control and diagnostic systems can provide numerical values of multifunctional technical system parameters in real time, to objectively assess their actual technical condition and predict the technical condition for a certain period of operation. These circumstances objectively raise the issue of improving the existing preventive maintenance and repair system and developing an individual system for sustaining the operational readiness of multifunctional technical systems. This paper presents the conceptual foundations of operational readiness of a multifunctional technical system based on the individual assessment of the technical state of its components and adaptive-situational management of the readiness sustainment process. The proposed approach is based on the creation of an individual technical state model for a multifunctional technical system, assessing and predicting its technical state, and adjusting the readiness sustainment program through adaptive situational management. The proposed approach ensures the required level of readiness and reliability of multifunctional technical systems operating in a dynamically changing environment.

scholarly journals The method for increasing the efficiency of equipment’s maintenance in railway traction power supply systems

2018 ◽  
Vol 47 (3) ◽  
pp. 39-47 ◽  
Author(s):  
Oleksandr Matusevych ◽  
Valeriy Kuznetsov ◽  
Viktor SYCHENKO
Keyword(s):  
Power Supply ◽  
Operational Reliability ◽  
Technical Condition ◽  
Repair System ◽  
Maintenance And Repair ◽  
Traction Substations ◽  
Electric Equipment ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Traction Power

Purpose. To develop the method for increasing the efficiency of the equipment’s maintenance and repair system, ensuring necessary level of operational reliability of the equipment, safety and reliability of the electric equipment with minimal expenses on operation. Relevance. Aging of the power equipment in railway power supply systems sharply raised a need for assessment of its states and degree of risk for operation outside rated service life. In critical conditions of technological processes and operational modes of the railways it is necessary to increase the equipment’s operational reliability. The scheduled maintenance and repair system whose main technical and economic criterion is the minimum of equipment’s downtimes on the basis of a rigid regulation of repair cycles, in the conditions of market regulations in the field of repair in many cases does not provide the optimal decisions due to insufficient financing. The solution of this problem is possible by improvement of the maintenance and repair system. Under these conditions the main direction for supporting the operational reliability of power electric equipment on TS is a development of the modern methods based on individual supervision over real changes of technical condition of power equipment. Scientific novelty. In this article the authors proposed an integrated approach, on the basis of which can be developed the effective maintenance and repair system for traction power supply systems. Proposed approach allowed to react quickly to changes of service conditions on traction substations, to control the technical condition of power electric equipment under the conditions of uncertainty, to establish interrelation between quality of service and operational reliability of the equipment, to choose a service strategy on traction substations. Practical importance. The validity of the developed method was confirmed by the results of calculations and practically by choosing the optimal maintenance's option for transformer TDTN-25000/150-70 U1 (ТДТН-25000/150-70 У1) on traction power supply substation.

MANAGEMENT TECHNICAL CONDITION OF TRANSPORT AND TECHNOLOGICAL MACHINES RUNNING INFORMATION AND TIPS SYSTEM DURING MAINTENANCE AND REPAIR

2016 ◽  
Vol 3 (1) ◽  
pp. 489-493
Author(s):  
Шапошников ◽  
Yu. Shaposhnikov ◽  
Орлов ◽  
R. Orlov
Keyword(s):  
Decision Making ◽  
Repair Process ◽  
Technical Condition ◽  
Technical State ◽  
Diagnostic Equipment ◽  
Maintenance And Repair ◽  
State Management ◽  
Generalized Information ◽  
Maintenance Work

The effectiveness of the control of a technical condition of transport and technological machines is achieved by the inclusion of information and advising systems in the process of maintenance and repair process. The completeness of the information on the technical condition of units and systems to determine the need for and volume of maintenance work and repairs. technical state management is based on generalized information on-board computer and diagnostic equipment, its optimization and decision-making.

scholarly journals Monitoring the Technical Condition of AC Electric Locomotives using Traction Energy Consumption Rates

2021 ◽  
Vol 18 (5) ◽  
pp. 62-89
Author(s):  
A. P. Semenov ◽  
V. V. Semchenko ◽  
I. Yu. Khromov
Keyword(s):  
Technology Implementation ◽  
Reactive Power ◽  
Electricity Consumption ◽  
Technical Condition ◽  
Operating Conditions ◽  
Repair System ◽  
Dynamic Data ◽  
Maintenance And Repair ◽  
Institute Of Technology ◽  
General Director

Currently, the methods of monitoring the technical condition of locomotives using data of on-board microprocessor-based control systems are widely used. This monitoring of Russia has become an operating technology of the locomotive maintenance and repair system.The main problem of monitoring is the limited set of sensors in locomotive circuits. Increased number of sensors leads to a decrease in reliability and to an increase in the cost of a locomotive and of its life cycle, while allowing to achieve better quality of diagnostic information.Besides, it is advisable to have integrated indicators of the technical condition of a locomotive. The article presents a computer software product for analysing the technical condition of a locomotive based on dynamic data on consumption of traction active power and generation of reactive power. The software was developed by using algorithmic language Visual BASIC for Applications, embedded in MS Excel, using probabilistic and statistical methods of analysis.The method for diagnosing the technical condition of a locomotive within the monitoring system is based on a comparison of dynamics of consumption of active and generation of reactive power by two sections of the same locomotive according to the principle of functional benchmarking. For monitoring the technical condition of locomotives, the term «pre-failure» is suggested, which is defined as the operable condition of a locomotive while there are internal hidden defects or damage. Pre-failure manifests itself in power consumption. To analyse the technical condition of AC electric locomotives in terms of electricity consumption, the initial data must have a high degree of unimodality, which is determined by uniformity of operating conditions.The resulting data obtained following the analysis of the technical condition of a locomotive based on the dynamic data on consumption of tractive active energy and generation of reactive power can be used to determine a defect that causes a change in consumption of electricity at the moment when the locomotive enters technical maintenance and repair depot. *Information about the authors: Semenov, Alexander P. – Ph.D. (Eng), General Director of JSC Research Institute of Technology, Control and Diagnostics of Railway Transport, Omsk, Russia, [email protected]. Semchenko, Victor V. – Ph.D. (Eng), General Director of JSC Railroad Centre of Technology Implementation of Krasnoyarsk Railway, Krasnoyarsk, Russia, [email protected]. Khromov, Igor Yu. – Business Analyst of LLC2050-Integrator, Moscow, Russia, [email protected]. Article received 13.05.2020, accepted 23.10.2020. For the original Russian text of the article please see p. 62. 

scholarly journals Organization of operation, repair and maintenance of locomotives in the railroad operating domain

2019 ◽  
Vol 135 ◽  
pp. 02008
Author(s):  
Aleksander Pavlyukov ◽  
Alexander Buynosov ◽  
Aleksander Mironov ◽  
Sergey Laptev
Keyword(s):  
Service Providers ◽  
Technical Condition ◽  
Repair System ◽  
Cycle Structure ◽  
Maintenance And Repair ◽  
Repair Costs ◽  
Limited Life ◽  
Software Product ◽  
Equipment Failures ◽  
Repair Cycle

The methods that are widely used today to determine the required locomotive fleet, the Corresponding maintenance and repair system consider the locomotive as a whole, without taking into account the technical condition of its individual units, which have a limited life cycle. Furthermore, the methods used today do not take into account the time spent on relocation from an operational locomotive depot to a service depot and back. The purpose of this study is to develop the methods for determining the number of locomotives based on the anticipated workloads for specific operational sections, the necessary accompanying maintenance and repair, the optimized repair cycle structure with due account of the available resources of the limiting units in the railroad operating domain which are capable of taking into account the technical condition of equipment (failures, repair costs, and time spent on relocation from one depot to another). A model for organization of repair of gas turbine locomotives assigned to operational locomotive depots while undergoing repair in service locomotive depots is proposed. Using this model, it is possible to develop a software product for distributing routine locomotive repairs among service providers, thus optimizing the workload of the latter.

scholarly journals Schedule maintenance and repair system of Locomotive

2020 ◽  
Vol 8 ◽  
Author(s):  
Valiev M.Sh ◽  
Kosimov H.R
Keyword(s):  
Automatic Control ◽  
Technical Condition ◽  
Monitoring Systems ◽  
Measurement Information ◽  
Repair System ◽  
Maintenance And Repair ◽  
Operation Process ◽  
Processing Measurement ◽  
Efficiency And Reliability

To increase the efficiency and reliability of locomotives, it is necessary to constantly monitor the operation process. The introduction of modern automatic control and monitoring systems on locomotives is not only a departure from the established state of the equipment, but also an effective and efficient way of processing measurement information that can detect changes in the technical condition of key parts.

scholarly journals Semi-Markov analytical model for assessing the quality of the maintenance system and the state of electromechanical complexes

2020 ◽  
Vol 2 (127) ◽  
pp. 15-24
Author(s):  
Volodymyr Kazhan ◽  
Vasyl Stopkin ◽  
Ksenia Kotlyarova ◽  
Alexander Yudin
Keyword(s):  
Mathematical Model ◽  
Analytical Formula ◽  
Technical Condition ◽  
Technical State ◽  
Analytical Relationship ◽  
Maintenance And Repair ◽  
Main Research ◽  
Availability Factor ◽  
Operation Process ◽  
Optimal Maintenance

Analysis of basic research. In practice, the EMC reliability indicators, in particular the failure rate, are time-varying quantities. In view of this, it is necessary to determine such periodicity values and maintenance volumes that would ensure the EMC maximum availability factor. The most adequate mathematical model for analyzing the technical state of EMC can be obtained using the apparatus of the theory of semi-Markov processes (PMF), the basis of which is an oriented graph of the basic states and transitions (GSP) of EMC during operation, which allows to formulate maintenance and maintenance strategies, the content of a separate strategy is determined a specific set of options for all states of EMC.The purpose of the article. Construction and study of a mathematical model of the EMC operation process to determine the optimal intervals and maintenance and repair strategies.The main research material. The solution to the first problem includes: building a model for the operation of the EMC; the derivation of the calculated ratio for the availability factor as a function of the technical condition of the EMC and the service station; obtaining an analytical formula for calculating optimal maintenance intervals.The paper proposes a combination of indicators ranked by importance in the linear programming problem, where the transfer time, which is a function of the SRT parameters and the technical condition of the EMC, is selected as the objective function, and the remaining indicators (readiness level, complex operation costs, and others) are taken into account in the form of restrictions. The result of solving this problem is a set of maintenance and repair options at each step of the operation of the EMC, which comprise the content of the optimal maintenance and repair strategy.Conclusions. An analytical relationship was obtained on the basis of the semi-Markov model of the operation process that allows one to calculate the optimal conditions for ensuring the availability factor of the periodicity of maintenance, which makes it possible to control the unsteady operation of the EMC, to obtain the necessary technical and economic quality indicators to build an adaptive ACS with the technical state of the EMC.

scholarly journals THE DETERMINATION OF THE PROCEDURE OF DIAGNOSTICS OF THE AXLE NODES OF LOCOMOTIVES ON THE BASIS OF DATA ABOUT THEIR DAMAGE IN MAINTENANCE

2015 ◽  
Vol 2 (158) ◽  
Author(s):  
Yurii Datsun ◽  
Georgy Kolesnichenko
Keyword(s):  
Technical Condition ◽  
Technical State ◽  
The Future ◽  
Technical Systems ◽  
First Diagnosis

In the article the damage of the axle boxes of locomotives CHS-2 in operation are analyzed. The mostfrequently in use bearings of axle nodes are damaged (their rings and separators). On the basis of histogramsis determined that the distribution obeys the Weibull law. Based on the analysis of the nature of the damagethe main directions of improving the reliability of axle nodes of locomotives in maintenance are determined.To determine the technical condition of axle boxes the usage of the methods and technical systems based onthe analysis of parameters of vibration is proposed. The article presents a short analysis of existing methodsof diagnostics of the bearings of nodes. As a result of the calculation according to the criterion of uptime thetime of first diagnosis of axle equipment after repair is defined.To further determine the frequency of diagnosis the criterion of change of parameters of the technical state ofthe node is proposed to use. For the current conditions of the maintenance of locomotives the introduction ofdiagnostic systems that have the functions of anticipating and shaping the future recommendations accordingto the previous diagnostics would be as the most acceptable option.

scholarly journals METHODOLOGY OF CHOOSING PARAMETERS FOR DIAGNOSING ELEMENTS OF URBAN ELECTRIC VEHICLES

2021 ◽  
Vol 3 (163) ◽  
pp. 138-143
Author(s):  
V. Shavkun
Keyword(s):  
Technological Process ◽  
High Efficiency ◽  
Technical Condition ◽  
Individual Characteristics ◽  
Rolling Stock ◽  
Diagnostic Tools ◽  
Repair System ◽  
Electric Transport ◽  
Repair Work ◽  
Maintenance And Repair

The operation of various vehicles in the field of urban electric transport is accompanied by high costs to maintain their working condition throughout the service life. Preservation of serviceability of vehicles is provided by performance of planned and preventive works on maintenance (MOT) and repair, and also the unscheduled repairs which are carried out for elimination of failures which arise in the interprophylactic periods, and malfunctions. As already noted, in the planned preventive maintenance and repair system, the vehicle after a certain mileage (time) is forcibly subjected to preventive actions in the prescribed amount. At the same time, despite the adjustment of maintenance and repair modes depending on a number of factors, there is no individual approach to each rolling stock. However, there is a need for such an approach, because even when rolling stock under the same conditions, the technical condition of each of them at the same time due to a number of reasons (individual characteristics of rolling stock, driving quality, maintenance, etc.) can differ significantly. Not every rolling stock requires all the operations provided by the "hard" volume of a particular type of maintenance. Execution of these "unnecessary" operations leads, on the one hand, to incomplete realization of individual properties of a rolling stock, increase in expenses for MOT, on the other, at all does not promote improvement of its technical condition. On the contrary, more frequent interventions in the work of joints of units and mechanisms contribute to increased wear of bonded surfaces, the appearance of damage to joints, violation of the tightness of joints. Significant losses of labor and material resources are also associated with a large amount of repair work due to late detection of failures. The fullest use of individual capabilities of rolling stock and ensuring on this basis the high efficiency of rolling stock during operation can be done through the widespread introduction into the technological process of maintenance and repair of diagnosing the technical condition of rolling stock. To increase the efficiency of the vehicle, use, methods and diagnostic tools have been developed, which are used both during maintenance and repairs, and as an independent technological process. Diagnosis allows to increase the coefficient of readiness and probability of trouble-free operation of vehicles, to reduce the complexity and cost of operation, to increase the maintainability and controllability of vehicles.

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.

Multicriterial Optimization of Technical Systems Considering Multiple Load and Availability Scenarios

2015 ◽  
Vol 807 ◽  
pp. 247-256 ◽  
Author(s):  
Lena C. Altherr ◽  
Thorsten Ederer ◽  
Philipp Pöttgen ◽  
Ulf Lorenz ◽  
Peter F. Pelz
Keyword(s):  
System Design ◽  
Cost Effective ◽  
Optimization Methods ◽  
Technical System ◽  
Multicriterial Optimization ◽  
Fluid Systems ◽  
Rule Number ◽  
Technical Systems ◽  
Multiple Load ◽  
Modern Optimization

Cheap does not imply cost-effective -- this is rule number one of zeitgeisty system design. The initial investment accounts only for a small portion of the lifecycle costs of a technical system. In fluid systems, about ninety percent of the total costs are caused by other factors like power consumption and maintenance. With modern optimization methods, it is already possible to plan an optimal technical system considering multiple objectives. In this paper, we focus on an often neglected contribution to the lifecycle costs: downtime costs due to spontaneous failures. Consequently, availability becomes an issue.

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