scholarly journals Systems analysis of the issue of ensuring reliable operation of vehicles

2018 ◽  
Vol 216 ◽  
pp. 03002 ◽  
Author(s):  
Ivan Tikhii ◽  
Viktor Kashkovsky
Keyword(s):  
Systems Analysis ◽  
Systems Approach ◽  
Transport Systems ◽  
Analysis Method ◽  
Reliable Operation ◽  
Control Structures ◽  
Theoretical Substantiation ◽  
Technical Systems ◽  
Effective Use

The paper describes relevance of the issue of ensuring reliable operation of vehicles for providing the required level of economic efficiency and safety of transportations via transport systems. Systems analysis method is used for solving the scientific problem. The place of vehicles is defined in the general classification of technical systems on the basis of systems analysis. The study proposes to divide the criteria of operational efficiency in accordance with the groups of properties of technical objects and shows their interrelation. As a result of the study, the generalized structure of integrated complexes of on-board equipment (ICOE) of vehicles is formed. Analysis of ICOE properties and their effect on the complex reliability is performed from the standpoint of systems approach is performed. Theoretical substantiation is provided for the necessity and the possibility of implementing the principles of survivability and fault tolerance of ICOE to ensure their effective use. The application of mutual control structures for the organization of on-board computer system diagnostics as a central part of ICOE is substantiated.

scholarly journals Analysis of assessment criteria for selected systems of transport means operation

2018 ◽  
Vol 182 ◽  
pp. 02003
Author(s):  
Łukasz Muślewski ◽  
Leszek Knopik ◽  
Bogdan Landowski ◽  
Oleh Polishchuk
Keyword(s):  
Time Moment ◽  
Transport Systems ◽  
Time Interval ◽  
Sociotechnical System ◽  
Human Driver ◽  
System Functioning ◽  
Technical Systems

The problems discussed in the study are connected with evaluation of complex technical systems functioning, in particular, transport systems. It was assumed that evaluation of their functioning depends on fulfilment degree of selected criteria. Therefore, it is important to determine a set of criteria including their type, number and importance. Since the research object is a public city transport system considered to be a sociotechnical system of the type: human (driver) –machine (vehicle) and the environment <H-M-E>, the criteria to be used for the assessment must include behavior of humans, operation of transport means, and the environmental impact. Thus, selection and determination of importance of significant, time variable, measurable and independent characteristics whose values, in a given time moment or a given time interval, define fulfillment degree of the criteria provide the basis for evaluation of such systems functioning. The quality of technical systems functioning in time is assessed on the basis of the criteria fulfilment degree or comparison and classification of different systems of the same type. It needs to be emphasized that the choice of optimal methods for selection of relevant criteria and determination of their impact on the analyzed system functioning is the research subject of study.

scholarly journals “A new approach for the Classification of Advanced Vehicles in Transportation Systems”

2019 ◽  
Vol 1 (2) ◽  
Author(s):  
Giannattasio Orlando
Keyword(s):  
Systems Analysis ◽  
Transportation Systems ◽  
Vehicle Classification ◽  
Transport Systems ◽  
Automated Vehicles ◽  
Error Resilient ◽  
New Approach ◽  
Practical Applications ◽  
Active Research

Automated vehicles represent one of the most active research topic in different engineering fields in the recent years; in particular, transportation systems theory, mathematical modeling, informatics and electronics are all involved in the development of more efficient, accurate and error resilient systems regarding this topic. For modeling purpose, it is useful to introduce a vehicle classification, but the current 6 SAE levels are too detailed, without sharp borders in some case, to be useful for practical applications; thus a 2-class meta-classification has been proposed but it seems too coarse. This paper starts from an analysis of the 6 SAE levels and of sensors developed and used in modern vehicles to establish a relationship between them; this study is useful to devise a new effective 3-class meta-classification useful to transport systems analysis involving automated vehicles.

Analysis of interconnections between technical systems on hierarchically connected technological levels of steel sheet production by hot rolling

2020 ◽  
Vol 76 (8) ◽  
pp. 847-855
Author(s):  
E. N. Shiryaeva ◽  
M. A. Polyakov ◽  
D. V. Terent'ev
Keyword(s):  
Hot Rolling ◽  
Systems Analysis ◽  
Rolling Mill ◽  
Steel Sheet ◽  
Technological System ◽  
Necessary Condition ◽  
Rolled Sheet ◽  
Technological Systems ◽  
Hot Rolling Mill ◽  
Technical Systems

Complexity of modern metallurgical plants, presence of great number of horizontal and vertical interactions between their various structural subdivisions makes it necessary to apply a systems analysis to elaborate effective measures for stable development of a plant operation. Among such measures, digitalization of a plant is widespread at present. To implement the digitalization it is necessary to have clear vision about links at all the levels of the technological system of a plant. A terminology quoted, accepted in the existing regulatory documents for defining of conceptions, comprising the technological system. It was shown, that the following four hierarchical levels of technological systems are distinguished: technological systems of operations, technological systems of processes, technological systems of production subdivisions and technological systems of plants. A hierarchical scheme of technological systems of hot-rolled sheet production at an integrated steel plant presented. Existing horizontal and vertical links between the basic plant’s shops shown. Peculiarities of flows of material, energy and information at the operation “rolling” of the technological system “hot rolling of a steel sheet” considered. As a technical system of the technological process of the hot rolling, the hot rolling mill was chosen. A structural diagram of the hot rolling mill was elaborated, the mill being consisted of reheating furnaces, roughing and finishing stand groups, with an intermediate roll-table between them, and down-coilers section. Since the rolling stands are the basic structural elements of the hot rolling mill, structural diagrams of a roughing and a finishing stands were elaborated. Results of the systems analysis of the technological and technical systems, hierarchically linked in the process of steel sheet hot rolling, can be applied for perfection of organization structure of the whole plant, as well as for elaboration mathematical models of a system separate elements functioning, which is a necessary condition for a plant digitalization.

Determining the discount rate when evaluating trade organizations: Some features

2020 ◽  
Vol 13 (1) ◽  
pp. 71-84
Author(s):  
E.A. Grigor'eva ◽  
A.S. Buzhikeeva
Keyword(s):  
Discount Rate ◽  
Economic Activity ◽  
Systems Approach ◽  
Market Value ◽  
Additional Risk ◽  
Evaluation Procedures ◽  
Analytical Research ◽  
Definition Of ◽  
Traditional Approaches

Subject. This article deals with the issues of determining the market value of the trading business, taking into account a number of characteristics. Objectives. The article aims to develop certain provisions of the methodology and practice of evaluating the business of trading organizations, namely, taking into account the additional risk of inventory feasibility when calculating the discount rate. Methods. For the study, we used a systems approach, and the cognition, and economic and analytical research methods. Results. The article presents a three-tiered classification of stocks and a definition of risk based on the criteria for dividing stocks by purpose, degree of implementation, and shelf life in accordance with the scale. Based on the classification, the article offers certain recommendations for determining the discount rate when evaluating trading organizations, aimed at taking into account additional risk. Conclusions. Various evaluation procedures within the framework of traditional approaches and methods in relation to trading organizations do not take into account risk specific to this type of economic activity. The proposed methodology for calculating the discount rate for trade organizations takes into account the features of their functioning.

scholarly journals A Systems Analysis of Small-Holder Agriculture. A Systems Approach to Mechanisation

1977 ◽  
Vol 10 (14) ◽  
pp. 545-557
Author(s):  
G. Muchiri ◽  
M.M. Shah ◽  
J.B. Holtman
Keyword(s):  
Systems Analysis ◽  
Systems Approach ◽  
Small Holder

Dynamic Analysis of the Pipe Lifting Mechanism on the Deepwater Pipelaying Vessel

2011 ◽  
Vol 199-200 ◽  
pp. 251-256
Author(s):  
Kai An Yu ◽  
Ke Yu Chen
Keyword(s):  
Numerical Analysis ◽  
Dynamic Analysis ◽  
High Efficiency ◽  
Transport Systems ◽  
Kinematic Pair ◽  
Analysis Method ◽  
Numerical Analysis Method ◽  
Upper Limit ◽  
Lifting Capacity ◽  
Limit Position

Based on requirements of pipe transport systems on deepwater pipelaying vessel, a new pipe lifting mechanism was designed. It was composed of crank-rocker and rocker-slider mechanism with good lifting capacity and high efficiency. When the slider went to the upper limit position, the mechanism could approximatively dwell, meeting the requirement for transverse conveyor operation. According to the theory of dynamics, numerical analysis method was used to the dynamic analysis of the mechanism. The results showed the maximum counterforce was at the joint between the rocker and ground, and this calculation could be a guideline for the kinematic pair structure designing.

Using fuzzy gh-models to represent the complex technical systems

2021 ◽  
pp. 55-60
Author(s):  
E. R. Muntyan ◽  
Keyword(s):  
Different Types ◽  
Complex Technical Systems ◽  
Technical Systems ◽  
Multiple Edges

to representation the complex technical systems, we propose the use of fuzzy GH-models based on graphs, which differ from known that allow to take into account, in addition to the same type of edges, different types of edges and multiple edges in the form of a vector. The paper notes the advantages of GH-graphs due to the use of edges in the form of a vector, which reduces the time spent on calculations on graphs and at the same time takes into account the necessary relations in the system. The classification of edges in GH-graphs is performed, due to the need to use all possible relations between the objects of the system.

A Dynamic Dyadic Systems Approach to Interpersonal Communication

2021 ◽  
Author(s):  
Denise Haunani Solomon ◽  
Miriam Brinberg ◽  
Graham D Bodie ◽  
Susanne Jones ◽  
Nilam Ram
Keyword(s):  
Interpersonal Communication ◽  
Systems Analysis ◽  
Time Series Data ◽  
Systems Approach ◽  
Dynamic Structure ◽  
Relevant Information ◽  
Dyadic Interaction ◽  
Series Data ◽  
Conversational Units ◽  
Dyadic Systems

Abstract This article articulates conceptual and methodological strategies for studying the dynamic structure of dyadic interaction revealed by the turn-to-turn exchange of messages between partners. Using dyadic time series data that capture partners’ back-and-forth contributions to conversations, dynamic dyadic systems analysis illuminates how individuals act and react to each other as they jointly construct conversations. Five layers of inquiry are offered, each of which yields theoretically relevant information: (a) identifying the individual moves and dyadic spaces that set the stage for dyadic interaction; (b) summarizing conversational units and sequences; (c) examining between-dyad differences in overall conversational structure; (d) describing the temporal evolution of conversational units and sequences; and (e) mapping within-dyad dynamics of conversations and between-dyad differences in those dynamics. Each layer of analysis is illustrated using examples from research on supportive conversations, and the application of dynamic dyadic systems analysis to a range of interpersonal communication phenomena is discussed.

scholarly journals STATISTICAL PROBABILITY EVALUATION OF OPERATING ITS

Transport ◽  
2010 ◽  
Vol 25 (2) ◽  
pp. 163-170 ◽  
Author(s):  
Adolfas Baublys ◽  
Aldona Jarašūnienė
Keyword(s):  
Analytical Description ◽  
Statistical Information ◽  
Transport Systems ◽  
Statistical Probability ◽  
Intelligent Transport ◽  
Loop Detectors ◽  
Probability Evaluation ◽  
Control Technologies ◽  
And Control

Intelligent Transport Systems (ITS) work with information and control technologies providing the core of ITS functions. Some of these technologies like loop detectors are well known to transportation professionals. However, there are a number of less familiar technologies and system concepts that are keys to ITS functions. Although information and control technologies act as a technical core of ITS, human factors also remain vitally important and potentially very complex issues. The process of operating ITS is influenced by a number of random factors. Along with an assessment of dependence upon separate random factors, the classification of those in the whole hierarchical structure of operating ITS is presented. Statistical information on operating ITS is renewed and replenished in the course of time. With the growth of information amounts, the costs of storing them also increase. Therefore, the article presents relevant algorithms for obtaining required statistical assessments with the least statistical information. It is deduced that while modelling the process of operating ITS, an analytical description of random factors applying non‐parametric assessment is suitable.

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