Introduction. The paper describes the actual problem of increasing the operating life of the brush working body (BWB) and improving the cleaning quality. Moreover, the authors discuss the factors affecting the quality of the road surface cleaning and the brush pile resource.Materials and methods. The research presents the results of the interaction process of the BWB pile with the cleaned surface of the roadway. In addition, the authors demonstrate the mathematical model of the interaction process with the basic surface. The simulation is carried out using the MATLAB software and Simulink extension. The authors also identify the factors that contribute the efficiency reduction of the municipal machine working process.Results. As a result of the simulation, the authors obtained the graphs of the pile deformation changing and the BWB pressing force changing. When processing the experimental data the researches also obtained the graphs of the brush pile plotted deformation from the BWB contact force and from 2, 3, 4 disks. For further mathematical modeling the authors determined the stiffness of the BWB pile under various loads. Therefore, the paper presents the approximation of the experimental dependence of the brush pile deformation on the pressing force and shows the regression equation.Conclusion. In conclusion, the authors determined the elastic characteristics of the BWB pile. By the comparing process of the experimental and theoretical data obtained from the mathematical model analysis, the authors found that the difference between them was less than 10%. The obtained results allowed confirming the mathematical model adequacy of the interaction process between the  BWB pile and the cleaning surface.

The article is devoted to the urgent problem of improving the roadway cleaning efficiency. To achieve maximum cleaning efficiency, an optimal pressing force of the brush equipment to the surface being cleaned should be provided. A schematic diagram of a sweeping machine working process as a complex dynamic system was constructed including a basic machine, brush and running equipment, a hydraulic drive, a road surface, as well as a microrelief control device reflecting the effect of the microrelief on the vertical coordinate of the working equipment. A mathematical model of the working process of a sweeping machine is presented. The simulation was carried out using the MATLAB software, Simulink extension. As a result, the dependences of the vertical coordinates and the pressing force of the brush equipment were established. In most cases, the brush positioning control is provided by a standard hydraulic drive; however, when the dimensions of a pothole are large enough, the standard hydraulic pump does not guarantee the required speed of the control device so that the deviations of the vertical coordinate could be compensated. To improve the speed of the brush positioning control device, the standard hydraulic pump was supplemented with an additional pump switching on only at particular periods of time.

ВВЕДЕНИЕАвтомобильная дорога рассчитана на определенный срок службы, в течении которо-го она подвергается различного рода воздей-ствиям транспорта и погодно-климатических факторов. Самым первым и наиболее неза-щищенным ее элементом, испытывающим та-кие воздействия, является асфальтобетонное покрытие. Практикой установлено, что поверх-ность покрытия, нуждающаяся в локальном текущем ремонте, ежегодно может составлять до 2-3% от общей площади покрытия дороги или ее участка. Когда серьезные повреждения и дефекты достигают 12-15%, общепринято ставить на ремонт 100% этой площади. Осо-бый вид техники, применяемый при проведе-нии ремонтных работ дорожного покрытия яв-ляется дорожная фреза [1,2,3]. АНАЛИЗ МАТЕМАТИЧЕСКОЙ МОДЕЛИ РАБОЧЕГО ПРОЦЕССА ДОРОЖНОЙ ФРЕЗЫ ПРИ РАЗРУШЕНИИ АСФАЛЬТОБЕТОНАПри проектировании дорожной фрезы од-ним из этапов является исследование стати-ческих и динамических характеристик на осно-ве адекватной математической модели [4.] В результате исследований рабочего про-цесса (РП) дорожной фрезы (ДФ) была состав-лена блок-схема (рисунок 1), которая легла в основу математической модели РП ДФ, реа-лизованной в программном продукте Matlab Simulink (рисунок 2) [5,6].Рис. 1. Блок-схема рабочего процесса дорожной фрезы, оснащенной системой управления загрузкой двигателя внутреннего сгорания

The article is devoted to the urgent problem of the resource increasing of the brush working equipment of a communal machine. To increase the resource of the brush working body, it is necessary to provide the recommended area of the contact spot of the brush bristles with the surface to be cleaned. This can be done by using a brush position control device. The results of the study of the effect of bristles deformation on the area of contact between the brush working equipment and the surface being cleaned are presented. A variant of the position controlling device of the brush working equipment of a communal machine providing the recommended area of the contact spot between the bristles and the surface being cleaned is proposed. A design diagram of the deformation of the brush working body is presented. As a result of the interaction process analysis between the brush working equipment and the surface being cleaned a relationship is obtained connecting the area of the contact spot with the deformation of the pile. A graph of this dependence is constructed. As a result of the work performed, a relationship is determined that allowing to determine the value of the contact area of the brush working equipment with the surface being cleaned for various values of the bristles deformation taking into account their wear.

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