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 FUNCTIONAL RESONANCE ANALYSIS METHOD MODELLING OF THE CAR SAFETY CONTROL

2020 ◽  
Vol 1 (46) ◽  
pp. 293-303
Author(s):  
Sakhno V ◽  
◽  
Poliakov V ◽  
Sakno O ◽  
Kolesnikova T ◽  
...  
Keyword(s):  
Current Knowledge ◽  
Technical Condition ◽  
Technical System ◽  
Analysis Method ◽  
Complex Activity ◽  
Safety Control ◽  
Resonance Analysis ◽  
Maintenance System ◽  
Car Safety ◽  
The Stability

In the article, the car safety control is simulated because of the change of its technical condition during operation using the functional resonance analysis method. The object of the study is car safety control because of the change of its technical condition during operation using the functional resonance analysis method. The purpose of the article, based on the method of functional resonance analysis, is to simulate the car safety control because of the change of its technical condition, which affects the deterioration of steerability, stability, smoothness and unning characteristics during operation. The research method is simulation modeling. To ensure the proper technical condition of the car, the technology of its maintenance has been analyzed. The practical processing of statistics is implemented using the ResilienceDS tool. On the basis of statistical data, the reasons for changing the technical condition of the running gear of the car and their influence on the operational properties were analyzed. ResilienceDS hardware is used to achieve this goal. Such a tool allowed us to model the socio- technical system "Human-Car-Organization of maintenance system" and to form formal models for the continuous evaluation of the stability and conditions of increasing the operation of cars. The data collected on the service station of cars was used to develop a maintenance model by the functional resonance analysis method. The model consists of a set of features that describe the steps taken to service a car. Simulation of the influence of the running gear technical condition on the performance of the car by the functional resonance analysis method has certainly revealed that car maintenance is a complex activity. The model by the functional resonance analysis method gave an idea of how successful and high-quality car maintenance works depend on the complex interaction of several of its parts that work in the technical system. Relationships are so complex that they are almost impossible to perceive. Thus, the important socio- technical mechanisms of the system "Human-Car-Organization of maintenance system" that regulate the relationship between functions. These can be informal, human mechanisms or specific tools, such as the level of technical condition of the car, the technological process of service, instructions and regulations of the repair team. The simulation of the influence of the technical condition of the undercarriage on the performance of the car by the functional resonance analysis method showed that considerable attention should be paid to elemental diagnostics. The performance of these functions is based more on current knowledge of the design of a new generation car and its maintenance technology, thus, may be more volatile. KEYWORDS: VEHICLE, CONTROL, SAFETY, TECHNICAL CONDITION, MAINTENANCE SYSTEM, FUNCTIONAL RESONANCE ANALYSIS METHOD

scholarly journals Improving the Methodology of Placing Peripheral Devices for Monitoring the Technical Condition of Rolling Stock

2021 ◽  
pp. 25-36
Author(s):  
V. V. Burchenkov
Keyword(s):  
Traffic Safety ◽  
Block Diagram ◽  
Research Work ◽  
Technical Condition ◽  
Rolling Stock ◽  
Functional Block Diagram ◽  
Process Step ◽  
Technical Control ◽  
Control Devices

Purpose. Based on the research work of units and parts of rolling stock undercarriage in transient modes of emergency situations it is proposed to optimize the sequential placing of peripheral contactless devices for technical control of locomotives and cars on railway lines. Methodology. Investigation of transient processes of temperature increase of faulty axle bearings of locomotives and cars during remote technical diagnosing allows one to organize theory and hardware construction of the peripheral systems for testing the rolling stock on the move. Automatic control of the technical state of the rolling stock on the move – the last and in some cases the only possible process step, which allows revealing unacceptable defects in rolling units and thereby prevent emergencies in railway transport. Findings. Based on the research it was proposed a solution to the optimization problem of placing peripheral control devices of rolling stock when moving according to the criteria of the linear and exponential nature of heating defective axle boxes of wheelsets and other units of undercarriage. The risks of train stop on the railway line because of the erroneous classification of normally heated axle boxes as overheated, as well as the consequences of classification of overheated axle box as normally heated axle boxes were evaluated. Originality. Optimization model of placing peripheral control devices based on probabilistic criteria for evaluating the degree of permissible risk that, at a minimum, should not be exceeded during the transition to control technical means. A functional block diagram of test hardware diagnostics for the wheelsets when determining the gradations of digital indicators of defects was proposed. Practical value. The value of the results obtained lies in the improvement of a method of placing technical control peripheral devices and diagnosing rolling stock when determining the distance between the control stations in the same direction and organizing tracking modes for railcars with developing defects. From a technical point, reduced error probability is directly related to traffic safety and diagnostic algorithms.

Reliability and functional safety as the main components of the quality of passenger cars

2018 ◽  
Vol 77 (4) ◽  
pp. 241-249 ◽  
Author(s):  
S. V. Petrov ◽  
G. V. Raykov ◽  
Yu. V. Kornev ◽  
N. B. Karavanova
Keyword(s):  
Traffic Safety ◽  
Technical Condition ◽  
Functional Safety ◽  
Passenger Cars ◽  
State Supervision ◽  
Reducing Costs ◽  
Main Components ◽  
Definition Of ◽  
Selection Of

Quality of passenger cars is a complex property, depending on the reliability and functional safety of the cars. Therefore, guided by the standard definition of the term "quality", satisfaction of the parties concerned, in this case passengers, customer, carrier, infrastructure owner, supplier or state supervision bodies, can be achieved by meeting the requirements objectively established to the noted indicators. In order to establish the requirements for the reliability and functional safety of passenger cars, it is necessary to solve the following tasks: Selection of the nomenclature of indicators taking into account the peculiarities of using passenger cars for their intended purpose. Development of calculation methods and selection of parameters of test plans for reliability for the established nomenclature of indicators. Determination of the achieved level of reliability and safety of cars based on selected indicators. Establishment of standardized values of indicators taking into account achieved level on the basis of the principle of reasonable sufficiency. The article shows the nomenclature of the applied indicators of reliability and safety of passenger cars, as well as formulas for their calculation, accepted criteria for failures and limiting states of cars, requirements for the accuracy and reliability of the measured indicators. The work concludes that the establishment of requirements for indicators of reliability and functional safety of passenger cars allows taking into account the interests of all involved parties. For passengers, infrastructure owner and state supervision bodies, interests in the field of traffic safety will be taken into account; for the carrier - these requirements will be taken into account in terms of timely and safe transportation of passengers; for the customer - in terms of ensuring the good technical condition of the cars; for the manufacturer - in terms of preserving the reputation, ensuring the competitiveness of products, reducing costs to eliminate inconsistencies in its quality.

scholarly journals REAL-TIME CONTROL OF OPERATIONAL AND TECHNICAL PERFORMANCES OF THE AIRCRAFT GROUP

2020 ◽  
pp. 12-22
Author(s):  
Yu. I. Buryak ◽  
M. P. Lyubovnikov ◽  
K. A. Kolesnikov
Keyword(s):  
Real Time ◽  
Technical Condition ◽  
Automatic Identification ◽  
Real Time Control ◽  
Software Applications ◽  
Time Control ◽  
Methodical Approach ◽  
Maintenance Work ◽  
Technical Operation ◽  
Technical Solutions

The article deals with the issues of improving the efficiency of control of operational and technical characteristics of the aircraft group by ensuring the completeness, reliability and relevance of data collection on the results of their operation. Proposals have been formed to combine aircraft maintenance work and collect the necessary data in a single automated real-time process. New approaches to automation of information processes of aircraft technical operation on the basis of wide use of mobile computer devices, document flow in electronic form and means of automatic identification United by the corresponding software components are offered. Mathematical models, algorithms and supporting software have been developed. The methodical approach for the automated creation of software applications using the tools of the software and technology platform is considered. A software and hardware complex for collecting and monitoring real-time parameters of the technical condition and operational and technical characteristics of the aircraft group was developed, the main functions of its components and the scheme of interaction were determined. It is shown that the proposed methodological and software-technical solutions allow to provide an increase in the reliability and efficiency of the assessment of operational and technical characteristics of aircraft using both single and integrated (complex) indicators.

Evaluation of WISC Similarities Responses According to Cognitive Style and Error Analysis: A Comparative Study

1970 ◽  
Vol 26 (1) ◽  
pp. 175-180 ◽  
Author(s):  
Leon P. Hall ◽  
M. La Verne La Driere
Keyword(s):  
Error Analysis ◽  
Cognitive Style ◽  
Emotionally Disturbed ◽  
School Setting ◽  
Chronological Age ◽  
Matched Pairs ◽  
Analysis Method ◽  
Neurologically Impaired ◽  
Diagnostic Power ◽  
Definition Of

80 emotionally disturbed and 80 neurologically impaired boys in a public school setting were matched for WISC Full Scale IQ and chronological age. An analysis was made of the Similarities subtest responses utilizing both the error-analysis method of Spence and the cognitive style procedure of Sigel for purposes of comparison. The Wilcoxon matched-pairs signed-ranks technique was used in analyzing the data. The results were as follows: (1) the error analysis approach provided the greater potential for differential diagnosis between the two groups under consideration; (2) use of the cognitive style scores permitted improved definition of the dynamic implications of the error-analysis categories, inadequate abstracting and narrative-descriptive responses; (3) diagnostic power was not increased when all responses as opposed to errors alone were considered.

Application of neural network expert systems for monitoring, diagnostics and forecasting of technical condition of aircraft engines

2020 ◽  
pp. 51-59
Author(s):  
Д.О. Пушкарёв
Keyword(s):  
Neural Network ◽  
Expert Systems ◽  
Gas Turbine ◽  
Technical Condition ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Fuzzy Interference System ◽  
Interference System ◽  
Monitoring And Diagnostics ◽  
Technical Operation

Рассматривается применение нейросетевых экспертных систем в области контроля, диагностики и прогнозирования технического состояния авиационных ГТД на основе нечеткой логики. Показана методика для решения таких задач в области технической эксплуатации авиационной техники совместно с использованием фаззи-интерференсной системы программы MATLAB. Используя статистические данные о работе двигателя формируется экспертная система на основе нейронной сети позволяющая осуществлять контроль и диагностику ГТД, а также прогнозировать дальнейшее техническое состояния анализируемого двигателя. The application of neural network expert systems in the field of monitoring, diagnostics and forecasting of the technical condition of aviation gas turbine engines based on fuzzy logic is considered. The technique for solving such problems in the field of technical operation of aircraft and using the fuzzy-interference system of the MATLAB program is shown. Using statistical data on the operation of the engine, an expert system is based on the fundamental of a neural network that provide monitoring and diagnostics of gas turbine engines, as well as predicting the further technical condition of the analyzed engine.

EVALUATION OF THE TECHNICAL CONDITION OF THE FLAPE BEARING WITH ADJUSTABLE RIGIDITY

2020 ◽  
Vol 6 ◽  
pp. 101-105
Author(s):  
A.V. SYTIN ◽  
N.V. TOKMAKOV ◽  
A.V. GORIN ◽  
М.А. TOKMAKOVA
Keyword(s):  
Control System ◽  
Block Diagram ◽  
Technical Condition ◽  
Qualitative Assessment ◽  
Schematic Diagram ◽  
Constructive Solution ◽  
Experimental Stand ◽  
Bearing Stiffness ◽  
Stiffness Control

The article considered the assessment of the technical condition of a petal bearing with adjustable stiffness. A schematic diagram of bearing stiffness control is presented. Revealed a constructive solution providing rigidity adjustment. For a qualitative assessment of the technical condition, a petal bearing was modeled in the VATCAD environment. The schematic diagram and block diagram of the control system of the experimental stand for assessing the technical condition of the petal bearing are described. Recommendations are given for the further application of the concept of assessing the technical condition of petal bearings.

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