scholarly journals RESEARCH OF MOTORCYCLE BRAKING PARAMETERS / MOTOCIKLO STABDYMO EFEKTYVUMO TYRIMAS

2016 ◽  
Vol 8 (5) ◽  
pp. 519-525
Author(s):  
Loreta Levulytė ◽  
Valdemaras Venckus ◽  
Robertas Robertas ◽  
Tomas Levulis
Keyword(s):  
Traffic Accidents ◽  
Emergency Situation ◽  
Longitudinal Direction ◽  
Technical Condition ◽  
Front Wheel ◽  
Point Of View ◽  
Reconstruction Process ◽  
Driving Experience ◽  
Road Pavement ◽  
Time Motor

From a technical point of view, in dangerous or emergency situation is very important motorcycle driver reaction and vehicle braking time. Motor-cycle deceleration parameters depend not only on the motorcycle brake system, but also on the driving experience. A significant influence on decel-eration the motorcycle has aerodynamic parameters, pavement type and condition, as well as the technical condition of the motocycle, shock absorb-ers, tire type and their technical condition. This article provides an analysis of the motorcycle longitudinal deceleration, braking modes of the mo-torcycle on a dry asphalt road surface. Motorcycle stopping – deceleration – acceleration efficiency issue, stopping in different modes. First ana-lyzed the dynamics of a motorcycle deceleration braking only the front wheel, then braked front and rear wheels and complex – then braked the front and rear wheels at the same time. The goal of experimental study is to determine the influence of braking modes intense fir motorcycle brak-ing deceleration when braking on dry road pavement, at three different braking modes, and set the braking path of change. Motorcycle decelera-tion in the longitudinal direction is an important parameter for analysis traffic accidents, for accident reconstruction process and the examination of motorcyclists technical possibility to avoid an accident. Pavojingoje ar avarinėje situacijoje techniniu požiūriu labai svarbus yra optimalus transporto priemonės stabdymas laiku. Motociklo lėtėjimo parametrai priklauso ne tik nuo motociklo stabdžių sistemos, bet ir nuo vairuotojo patirties. Didelę įtaką motociklo lėtėjimui turi aerodinaminiai parametrai, kelio dangos tipas ir būklė, taip pat motociklo techninė būklė, amortizatorių, padangų tipas ir jų techninė būklė. Šiame straipsnyje pateikiama motociklo išilginio lėtėjimo analizė, stabdant motociklą ant sausos asfalto kelio dangos. Motociklo stabdymo – lėtėjimo – pagreičio efektyvumas nagrinėjamas, stabdant skirtingais režimais. Pirmiausia analizuojama motociklo lėtėjimo dinamika stabdant tik priekinį ratą, paskui priekinį ir galinį ratus bei stabdant kompleksiškai – priekinį ir galinį ratus. Eksperimentinio tyrimo tikslas – nustatyti, kokią įtaką turi stabdymo režimai intensyviai stabdomo motociklo lėtėjimui stabdant ant sausos kelio dangos, trimis skirtingais stabdymo režimais ir nustatyti stabdymo kelio pokytį. Motociklo lėtėjimo pagreitis išilgine kryptimi yra svarbus eismo įvykių analizei parametras atkuriant eismo įvykio eigą ir nagrinėjant motociklo vairuotojo techninę galimybę išvengti eismo įvykio.

scholarly journals RESEARCH ON TECHNICAL CONDITION OF VEHICLE LIGHTING SYSTEM WITH THE USING MODERN DEVICES

2018 ◽  
Vol 18 ◽  
pp. 406-412
Author(s):  
A. O. Kazarov ◽  
P. M. Khorobrykh ◽  
V. O. Labintsev
Keyword(s):  
Light Intensity ◽  
Traffic Accidents ◽  
Technical Condition ◽  
Point Of View ◽  
Technical State ◽  
Light Distribution ◽  
Control Points ◽  
Lighting System ◽  
Economic Commission ◽  
Lead Vehicle

While investigating traffic accidents that took place during darkness hours on unlighted area of carriage way, investigating authorities are interested in reasons that, from a technical point of view, could lead vehicle to run down a pedestrian or a stationary obstacle, to a collision of vehicles. Furthermore, while performing research on technical condition of a vehicle lighting system using modern equipment, forensic autotechnician experts are faced with problems related to the lack of skills in using such equipment. Moreover, while solving certain issues related to the technical state of lighting system, posed questions are not fully disclosed by forensic autotechnician experts, “narrow” conclusions are made, so far as during examining technical state of vehicle lighting system, most forensic autotechnician experts do not apply to State Standard DSTU 3649:2010 requirements. This article details the order of actions of specialists, forensic experts while performing research on technical state of the vehicle lighting system using the modern OMA 684D device. The minimum values of headlamp intensity for certain types of headlights bulbs in according to Rules ECE UNO (Economic Commission for Europe the United Nations Organization) requirements are described. Recommendations for use of DSTU 3649:2010 are given while performing research technical condition of vehicle lighting system. To obtain result values in candelas, as required by DSTU 3649:2010, the calculation of the translation of the values of headlamps light intensity from luxes to candelas is offered. Minimum and maximum values of the headlamps light intensity for certain types of light distribution according to DSTU 3649:2010 are also indicated. The decoding of headlight types with values of light intensity is given. For better perception of the correctness of the research results, images of the control points location depending on the type of light distribution are indicated.

scholarly journals Improvement of a bridge connection node with embankment by applying curved approach slabs

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Vladislav Andreev ◽  
Igor Ovchinnikov
Keyword(s):  
Road Safety ◽  
Technical Condition ◽  
Point Of View ◽  
Dynamic Effects ◽  
The Road ◽  
Approach Slabs ◽  
Road Pavement ◽  
Functional Quality ◽  
On The Road ◽  
Negative Shock

The article is devoted to improving the bridge connection node with embankment by application of curved approach slabs. The most important request by arranging of bridge connection with embankment is to ensure soft entry of transport from the approach embankment to the bridge for the entire period of operation. However, overtime on the road sections of bridge connection with embankment appear soil collapsing, cracks and birdbaths in the carpet. This problem is partially solved by the installation of reinforced-concrete approach slabs buried in the connection zone between the abutment and the approach embankment. Despite the use of straight approach slabs in the bridge-connection node with embankment, the formation of bumps of grade profile is observed, they reduce road safety, worsen the technical condition of vehicles, cause discomfort to the driver and passengers. From the structural and technological point of view, request by arranging of bridge connection by curved approach slabs higher functional quality can be achieved. Due to the soft passage of bridge connection node, it is possible to reduce the negative shock-dynamic effects, which will increase the durability of the connection node and approach road pavement. The article presents several possible to use bridge connection node structures through the use of curved approach slabs: concave, convex and S-shaped. A comparative analysis of bridge-connection structural versions will reveal the most effective construct that can ensure soft passage of the bridge connection node with approach embankment.

Application of fiber-optic measuring technology and phase-chronometric method for control and monitoring of technical condition of aircraft structures

2021 ◽  
pp. 49-56
Author(s):  
Stanislav S. Khabarov ◽  
Alexander S. Komshin
Keyword(s):  
Fatigue Life ◽  
Fiber Optic ◽  
Technical Condition ◽  
Point Of View ◽  
Flight Performance ◽  
Diagnostic Systems ◽  
Safe Operation ◽  
Excess Reserves ◽  
The Creation ◽  
Original Approach

Problems of ensuring the safe operation of an aircraft from the point of view of the fatigue life of its structure are considered. The relevance of the creation and implementation of diagnostic systems for monitoring the technical condition of structures of complex technical objects is shown on the example of a helicopter. An original approach to the creation and implementation of complex systems for diagnostics and monitoring of the technical condition of complex technical objects is presented, combining fiber-optic measuring technology and phase-chronometric method. It is shown that the use of monitoring and diagnostic systems ensures the transition to operation based on the actual technical condition. The proposed approach makes it possible to increase the time between overhaul intervals and reduce excess reserves in terms of the reliability factors of structures, which increases the flight performance of aircraft.

Сase-systems for development of multiagent system (MAS) in the system of diagnostics and maintenance of vehicles

2021 ◽  
Vol 13 (1) ◽  
pp. 87-93
Author(s):  
Viacheslav Pavlenko ◽  
◽  
Volodymyr Manuylov ◽  
Volodymyr Kuzhel ◽  
◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Technical Condition ◽  
Point Of View ◽  
Multi Agent Systems ◽  
Agent Systems ◽  
Software Products ◽  
Multi Agent ◽  
Software Code ◽  
Low Performance ◽  
Intelligent Methods

The article provides a comparative analysis of existing software products and libraries that allow the design of multi-agent systems for diagnostics and maintenance systems for modern cars. The authors substantiate two main shortcomings inherent in all products - analogues: the need for high qualification of the user as a software code developer, and low performance of intelligent methods in the structure of agents, which worsens their performance. Both manufacturers and car owners are objectively interested in the widespread use of telematics systems for monitoring the technical condition of cars. Predictive diagnostics gives them access to a huge amount of information about all the nuances of car operation, wherever they are, during the entire service life. The application of this approach using a multi-agent system (MAS) will allow taking the next step in this direction. Information from the connected vehicles goes to the main server. Systematization and analysis of data make it possible to establish the causes of malfunctions, identify patterns of their occurrence and make further predictions. Purpose of the work: to perform a comparative analysis of existing software products and libraries that allow the design of multi-agent systems. The topic of the work is disclosed on the example of the analysis of software tools for the development and design of MAS at the present stage. There are a number of systems and libraries on the market designed for the development of multi-agent systems. These Case - systems are suitable for the development of multi-agent systems of any direction, that is, they are universal from this point of view. Therefore, for us it is a universal application tool for the automotive industry. Ultimately, the work performed a comparative analysis of existing software products and libraries that allow the design of multi-agent systems. The analysis revealed two main drawbacks inherent in all products - analogs: the need for high user qualifications as a developer of software code, and low indicators of the possibilities of introducing intelligent methods into the structure of agents, worsens the indicators of their work.

scholarly journals FIELD OF TASKS OF THE CONSTRUCTION OBJECT

2020 ◽  
pp. 78-83
Author(s):  
Elena Gorda
Keyword(s):  
Life Cycle ◽  
Information Technologies ◽  
Technical Condition ◽  
Point Of View ◽  
Information Modeling ◽  
Theoretical Point ◽  
Construction Design ◽  
Information Models ◽  
Merger Integration ◽  
Concept Classification

The generalization of the concept of the task in terms of information environments of construction [ISB] is performed. The approach to the presentation of such concepts as construction issues, construction problem, ontology, idea, concept, classification of problems, tasks, directions, objects included in the staging part of the tasks taking into account the specifics of the tasks solved within the developed information technologies in construction issues. The paper defines and investigates on the basis of methods of construction geodesy the actual tasks of construction, design, modeling, monitoring and their totality in the field of construction by means of information theory. An approach to the description of the technical condition of a construction object on the basis of information modeling in the management of the construction process and information modeling within the life cycle is proposed and described. Information modeling is a process, the results of each stage of which, ie information models of the building, differ greatly from each other depending on the stage of the life cycle of the object and the requirements for modeling in solving emerging problems. The construction object strongly depends on the stage of its existence: if during the design it is virtual, and during construction it gradually finds a real embodiment, then at a long stage of operation the building enters a period of stability and is no longer subject to significant changes. An information model is a variable object that depends on the range of tasks to be solved. Using the methods of construction geodesy in the field of construction, the field of problems, class of problems, the concept of the problem, the state of the problem, subtasks, chains of problems, problem solving and the result of solving the problem, the relationship between problems setting the transformation of aggregation, merger, integration. The urgency of the task from a theoretical point of view is determined by the expansion of the ontology of construction as a science, from an applied point of view is determined by the possibility of accurate formalization of regulatory information and documentation in construction.

scholarly journals Improving safety of interfactory and company motor and electric vehicles by introducing modern digital devices

2021 ◽  
pp. 2-9
Author(s):  
А. A. Korotkiy ◽  
◽  
O. A. Bakhteev ◽  
S. S. Kostyukov ◽  
◽  
...  
Keyword(s):  
Electric Vehicles ◽  
Traffic Accidents ◽  
Occupational Safety ◽  
Technical Condition ◽  
Machine Building ◽  
Monitoring And Control ◽  
Operating Personnel ◽  
Digital Devices ◽  
Industrial Enterprises ◽  
The Government

Introduction. Industrial injuries are one of the most pressing problems in the field of occupational safety at enterprises of the main industries in the Russian Federation. Most cases of such injuries are noted when moving goods and people by means of various types of interfactory transport. A set of regulatory documents developed in recent years by the Government of the country is dedicated to solving this problem. In accordance with the current trends in the development of new technical solutions, the use of a complex of devices based on IT-technologies is effective. This article is devoted to improving the safety of interfactory and company motor and electric vehicles by introducing modern digital devices. Problem Statement. Almost all large industrial enterprises have a need to move goods and personnel both to the place of production activities and within the enterprises. Motor and electric vehicles used for these purposes do not always undergo a maintenance check, they often undergo technical inspection and repairs with whatever funds remains, and always the personnel operating these vehicles do not have permission to drive. Possible accidents with interfactory and company vehicles occurring as a result of insufficient control over the technical condition of vehicles and inadequate or absent medical and administrative checks of the operating personnel can lead to injuries at the enterprise. Theoretical Part. This article proposes methods for reducing traffic accidents of interfactory and company motor and electric vehicles of industrial enterprises and warehouse enterprises through the introduction of remote monitoring of operation based on IT-technologies, operating with the use of mobile applications that use Internet of Things technologies. The options for introducing security elements designed to reduce the number of transport accidents in internal transport of industrial enterprises and warehouse complexes are considered. An experiment was carried out to introduce system components to vehicles of an industrial enterprise. Conclusion. The use of the proposed monitoring and control system for motor and electric vehicles at machine-building enterprises and warehouse complexes will make it possible to quickly resolve issues related to labor protection, the economy of the enterprise and compliance with the labor discipline. In particular, it is planned to reduce vehicle failures due to mechanical failures, as well as to make timely decisions on the removal from driving the drivers who are not feeling well.

scholarly journals Simulation of Temperature Regime of Pavement Layers in Transition Periods of Road Climatic Zone IV

2019 ◽  
Vol 9 (1) ◽  
pp. 6142-6148
Keyword(s):  
Temperature Regime ◽  
Traffic Accidents ◽  
Road Traffic ◽  
Climatic Zone ◽  
Short Term ◽  
Zero Crossing ◽  
Krasnodar Krai ◽  
Weather Forecasts ◽  
Road Pavement ◽  
Pavement Layers

Pavement icing during short-term night temperature drops leads to deterioration of highway performances and increase in road traffic accidents (RTA) in Krasnodar Krai. Peculiar features of temperature regime in road climatic zone (RCZ) IV are analyzed. The considered climatic zone is characterized by frequent zero crossing temperatures of air and road pavement, sharp short-term temperature drops in nighttime, frequent icing of road pavement. Main factors are highlighted which effect temperature regime of road structures. Mathematical model is presented for prediction of road pavement temperature based on weather forecasts. Possibility to decrease the volume of pavement icing by means of thermophysical properties of pavement layers is analyzed.

Motorcyclist Traffic Accidents and Risk Factors: A Singapore Study

1990 ◽  
Vol 4 (1) ◽  
pp. 34-38 ◽  
Author(s):  
Tze Wai Wong ◽  
Wai-On Phoon ◽  
James Lee ◽  
Ivy Po Chu Yiu ◽  
Kam Pui Fung ◽  
...  
Keyword(s):  
Public Education ◽  
Traffic Accidents ◽  
Injury Severity ◽  
Driving Experience ◽  
Factors Associated ◽  
Singapore General Hospital ◽  
Breath Testing ◽  
Severity Scores ◽  
One Year ◽  
Drunken Driving

Motorcyclist accidents cause significant morbidity and mortality in Singapore. To elucidate personal and environmental factors associated with such accidents, we studied 198 motorcyclists who were hospitalized in Singapore General Hospital between April 1986 and June 1987. The patients were mostly young and almost exclusively male with a high proportion of Malays. Most accidents occurred on Sundays and at night. Ten percent of the victims took alcohol before the accident. Most had low injury severity scores (ISS). Less experienced drivers had a significantly higher ISS than those with one year or longer of driving experience. Vigorous control of drunken driving, through public education and intensive breath testing, should reduce the incidence of traffic accidents.

Front Wheel Vibrations: A Hydraulic Point of View - Models and First Results

2001 ◽  
Author(s):  
Marc Alirand ◽  
Michel Lebrun ◽  
Claude William Richards
Keyword(s):  
Front Wheel ◽  
Point Of View ◽  
First Results

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.

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