Actual state and suppression of a lateral force induced at guard rail in railway turnout.

Abstract During a cornering maneuver by a vehicle, high forces are exerted on the tire's footprint and in the contact zone between the tire and the rim. To optimize the design of these components, a method is presented whereby the forces at the tire-rim interface and between the tire and roadway may be predicted using finite element analysis. The cornering tire is modeled quasi-statically using a nonlinear geometric approach, with a lateral force and a slip angle applied to the spindle of the wheel to simulate the cornering loads. These values were obtained experimentally from a force and moment machine. This procedure avoids the need for a costly dynamic analysis. Good agreement was obtained with experimental results for self-aligning torque, giving confidence in the results obtained in the tire footprint and at the rim. The model allows prediction of the geometry and of the pressure distributions in the footprint, since friction and slip effects in this area were considered. The model lends itself to further refinement for improved accuracy and additional applications.

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Normalization of Tire Force and Moment Data

Tire Science and Technology ◽

10.2346/1.2139525 ◽

1993 ◽

Vol 21 (2) ◽

pp. 91-119 ◽

Cited By ~ 11

Author(s):

H. S. Radt ◽

D. A. Glemming

Keyword(s):

Surface Water ◽

Lateral Force ◽

Slip Angle ◽

Inflation Pressure ◽

Slip Ratio ◽

Tire Force ◽

Camber Angle ◽

Potential Benefits ◽

Overturning Moment ◽

Semi Empirical

Abstract Semi-empirical theories of tire mechanics are employed to determine appropriate means to normalize forces, moments, angles, and slip ratios. Force and moment measurements on a P195/70R 14 tire were normalized to show that data at different loads could then be superimposed, yielding close to one normalized curve. Included are lateral force, self-aligning torque, and overturning moment as a function of slip angle, inclination angle, slip ratio, and combinations. It is shown that, by proper normalization of the data, one need only determine one normalized force function that applies to combinations of slip angle, camber angle, and load or slip angle, slip ratio, and load. Normalized curves are compared for the effects of inflation pressure and surface water thickness. Potential benefits as well as limitations and deficiencies of the approach are presented.

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Simplified Prediction of Ply Steer in Radial Tires

Tire Science and Technology ◽

10.2346/1.2151018 ◽

1980 ◽

Vol 8 (1) ◽

pp. 3-9 ◽

Cited By ~ 7

Author(s):

C. W. Bert

Keyword(s):

Composite Laminate ◽

Ground Plane ◽

Lateral Force ◽

Rolling Contact ◽

Slip Angle ◽

Uniform Stress ◽

Rubber Composite ◽

Laminate Theory ◽

Contact Models ◽

Uniform Stress State

Abstract Ply steer is a rolling contact phenomenon which manifests itself as a lateral force acting at the ground plane of a tire constrained in yaw or a change in slip angle of a tire free to yaw. It has long been known that radial tires generally exhibit greater ply steer than do bias tires. However, the only previously published quantitative analysis of this phenomenon considered the multi-layer cord-rubber composite by means of netting analysis, which is not very accurate at cord angles typical of radial tire belts. A simple, explicit expression is developed herein by combining modern composite laminate theory with two very simple, uniform-stress-state tire-road contact models. The ply-steer results predicted by the resulting expressions are compared with some experimental results and the agreement is found to be reasonably satisfactory.

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Measurement and Visualization of the Contact Pressure Distribution of Rubber Disks and Tires

Tire Science and Technology ◽

10.2346/1.2137506 ◽

1995 ◽

Vol 23 (4) ◽

pp. 238-255 ◽

Cited By ~ 16

Author(s):

E. H. Sakai

Keyword(s):

Pressure Distribution ◽

Contact Pressure ◽

Contact Area ◽

Light Absorption ◽

Lateral Force ◽

Contact Pressure Distribution ◽

High Definition ◽

The Road ◽

Close Relationship ◽

Processing Techniques

Abstract The contact conditions of a tire with the road surface have a close relationship to various properties of the tire and are among the most important characteristics in evaluating the performance of the tire. In this research, a new measurement device was developed that allows the contact stress distribution to be quantified and visualized. The measuring principle of this device is that the light absorption at the interface between an optical prism and an evenly ground or worn rubber surface is a function of contact pressure. The light absorption can be measured at a number of points on the surface to obtain the pressure distribution. Using this device, the contact pressure distribution of a rubber disk loaded against a plate was measured. It was found that the pressure distribution was not flat but varied greatly depending upon the height and diameter of the rubber disk. The variation can be explained by a “spring” effect, a “liquid” effect, and an “edge” effect of the rubber disk. Next, the measurement and image processing techniques were applied to a loaded tire. A very high definition image was obtained that displayed the true contact area, the shape of the area, and the pressure distribution from which irregular wear was easily detected. Finally, the deformation of the contact area and changes in the pressure distribution in the tread rubber block were measured when a lateral force was applied to the loaded tire.

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WAYS TO IMPROVE INTERNAL AUDIT OF PAYMENTS TO EMPLOYEES

International scientific journal Internauka Series Economical Sciences ◽

10.25313/2520-2294-2020-9-6302 ◽

2017 ◽

Author(s):

Natalia Ivanova ◽

◽

Svitlana Mykhailovyna ◽

Olena Matros ◽

◽

...

Keyword(s):

Labor Productivity ◽

Information Technologies ◽

Internal Audit ◽

Employee Benefits ◽

Actual State ◽

High Quality ◽

Employee Benefit ◽

Productivity Indicators ◽

State Of Affairs ◽

Practical Recommendations

There is no doubt that the issues of improving the methodological foundations of internal audit of payments to employees in the context of increased competition in all areas of business, the introduction of modern information technologies in the accounting process are relevant. Salaries are not only a source that ensures the life of employees, but their growth affects the increase in labor productivity and profit of the enterprise. Internal audit allows to ensure high-quality accounting of payments to employees, which is important in determining labor productivity indicators and ways to improve it. The purpose of the article is to substantiate the theoretical and methodological basis with the development of practical recommendations for improving the methodology of internal audit of employee benefits in order to improve the detailed audit content. It has been established that in order to ensure the correct and high-quality organization of internal audit, it is advisable to provide for the establishment of the internal audit service as a separate subdivision, providing the necessary number of accountants and auditors in the staff. The methodology of the internal audit of payroll has been improved in order to provide a detailed explanation of the content of the audit. The main objects of the internal audit of employee benefit calculations have been singled out. The sequence of the employee benefit calculations audit was determined. The internal auditor's working documents were formed: A statement of selective verification of vacation pay accrual and a Statement of violations revealed during the audit of employee benefit calculations. Using new changes and suggestions will allow the company’s internal audit service to cover all aspects of accounting and reporting on employee benefits. Preparation results of the internal audit of payments to employees in the form of proposed working documents will ensure that the results of the audit correspond to the actual state of Affairs at the enterprise and ensure the availability of information during the next audit. Prospects for further research should be carried out in the direction of developing a regulatory framework for internal audit, taking into account industry specifics affecting the economic activity of the enterprise.

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STUDY OF MOVEMENTS MOBILITY-IMPAIRED POPULATION GROUPS IN PEDESTRIAN ZONES OF THE STREET-ROAD NETWORK (in the example of city of Kiev)

International scientific journal Internauka ◽

10.25313/2520-2057-2020-16-6394 ◽

2017 ◽

Author(s):

Oleksandra Cherednichenko ◽

Keyword(s):

European Union ◽

Comparative Analysis ◽

Road Network ◽

Actual State ◽

The European Union ◽

Regulatory Requirements ◽

Population Groups ◽

The Road ◽

Mobility Impaired

The results of the study of the main elements of unobstructed space are presented and the compliance of the actual state with the regulatory requirements of measures to ensure a safe, comfortable, accessible and informative pedestrian zone of the road network is analyzed. A comparative analysis of the main regulatory requirements for access ramps on the legislation of Ukraine and the European Union is carried out.

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Comparative Assessment of Poverty Indicators in the European Part of the CIS and the European Union as a Social Criterion of Economic Security

Economics and Management ◽

10.35854/1998-1627-2020-9-924-939 ◽

2020 ◽

Vol 26 (9) ◽

pp. 924-939

Author(s):

V. A. Tsvetkov ◽

K. Kh. Zoidov ◽

K. S. Yankauskas ◽

Sh. Kobil

Keyword(s):

European Union ◽

Comparative Analysis ◽

Poverty Reduction ◽

Economic Security ◽

Actual State ◽

The European Union ◽

Poverty Dynamics ◽

Subsistence Level ◽

Strategic Objectives ◽

Poverty Indicators

The presented study comparatively analyzes indicators of the level of poverty and social inequality in Belarus, Ukraine, Moldova, and the European Union (EU) as a criterion of national economic security.Aim. The study aims to examine existing approaches to determining the level of poverty and its dynamics and to consider suggestions for improving this methodology.Tasks. The authors examine and comparatively analyze approaches and methods for determining the level of poverty and its dynamics in the European Union and the CIS countries that are not members of the Eurasian Economic Union (EAEU).Methods. This study uses the methods of systems analysis, evolutionary-institutional theory, and historical approach.Results. Determining the level of poverty based on the number of citizens with incomes below the subsistence level can lead to misrepresentation of the actual state of this phenomenon. Calculation of poverty indicators based on consumer spending provides more accurate data on the level of poverty in a country where a significant share of the population’s income is generated by remittances from individuals living abroad, which are not reflected in official income statistics. A comparative analysis of poverty dynamics shows that in 2013 the level of poverty in all four examined countries decreased compared to 2006. Poverty dynamics in Russia and Belarus is more synchronized than in Ukraine and Moldova. A common methodology for calculating the level of poverty in all EU countries makes it possible to conduct a more thorough comparative analysis of poverty dynamics and to formulate more accurate recommendations in the field of anti-poverty policies. Based on the identified poverty dynamics in the EU and Russia, it is highly possible that strategic objectives on poverty reduction in the European Union and Russia will not be completed.Conclusions. To exclude the possibility of interested authorities influencing the dynamics of the poverty indicator by changing its threshold values depending on the current economic or political situation, it is necessary to switch to comprehensive assessment of this indicator in Russia. For comparative cross-country data analysis, it is advisable to consider the possibility of creating a Eurasian Statistics Service within the EAEU that would collect statistics and standardize statistical methods among the EAEU member states.

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MONITORING AND PREDICTIVE ANALYTICS OF TECHNOLOGICAL EQUIPMENT ON THE BASED OF INDUSTRIAL INTERNET OF THINGS

ВЕСТНИК ВОРОНЕЖСКОГО ГОСУДАРСТВЕННОГО ТЕХНИЧЕСКОГО УНИВЕРСИТЕТА ◽

10.36622/vstu.2020.16.5.001 ◽

2020 ◽

pp. 7-12

Author(s):

С.Л. Добрынин ◽

В.Л. Бурковский

Keyword(s):

Internet Of Things ◽

Data Acquisition ◽

Predictive Analytics ◽

Actual State ◽

Monitoring And Control ◽

Industrial Internet Of Things ◽

Machining Time ◽

Industrial Internet ◽

Acquisition Device ◽

Data Acquisition Device

Произведен обзор технологий в рамках концепции четвертой промышленной революции, рассмотрены примеры реализации новых моделей управления технологическими процессами на базе промышленного интернета вещей. Описано техническое устройство основных подсистем системы мониторинга и контроля, служащей для повышения осведомленности о фактическом состоянии производственных ресурсов в особенности станков и аддитивного оборудования в режиме реального времени. Архитектура предлагаемой системы состоит из устройства сбора данных (УСД), реализующего быстрый и эффективный сбор данных от станков и шлюза, передающего ликвидную часть информации в облачное хранилище для дальнейшей обработки и анализа. Передача данных выполняется на двух уровнях: локально в цехе, с использованием беспроводной сенсорной сети (WSN) на базе стека протоколов ZigBee от устройства сбора данных к шлюзам и от шлюзов в облако с использованием интернет-протоколов. Разработан алгоритм инициализации протоколов связи между устройством сбора данных и шлюзом, а также алгоритм выявления неисправностей в сети. Расчет фактического времени обработки станочных подсистем позволяет более эффективно планировать профилактическое обслуживание вместо того, чтобы выполнять задачи обслуживания в фиксированные интервалы без учета времени использования оборудования We carried out a review of technologies within the framework of the concept of the fourth industrial revolution; we considered examples of the implementation of new models of process control based on the industrial Internet of things. We described the technical structure of the main subsystems of the monitoring and control system to increase awareness of the actual state of production resources in particular machine tools and additive equipment in real time. The architecture of the proposed system consists of a data acquisition device (DAD) that implements fast and efficient data collection from machines and a gateway that transfers the liquid part of information to the cloud storage for further processing and analysis. We carried out the data transmission at two levels, locally in the workshop, using a wireless sensor network (WSN) based on ZigBee protocol stack from the data acquisition device to the gateways and from the gateways to the cloud using Internet protocols. An algorithm was developed for initializing communication protocols between a data acquisition device and a gateway, as well as an algorithm for detecting network malfunctions. Calculating the actual machining time of machine subsystems allows us to more efficiently scheduling preventive maintenance rather than performing maintenance tasks at fixed intervals without considering equipment usage

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