Transport demand (a set of data about trips and passengers mobility patterns in the network) is a golden key for solving a wide range of issues of transportation and town planning problems. These are development of the road network, development and optimization of public transport routes, etc. To determine...

The process of automatic balancing of an unbalanced rotor was simulated using four pendulums mounted in pairs on the shaft on both sides of the rotor. The rotor is rigidly fixed in the housing, which is mounted on elastic supports. Studies have shown that the pendulums partially or fully compensate the...

Currently, there is the practical reliability of roads in terms of safety, durability, maintainability, operability and other important consumer properties of the groups of providing of significant speed, continuity, convenience and traffic safety. These include throughput and traffic load, permissible...

The article describes results of an experimental study of ultrasonic treatment as a part of a complex temperature-force effect on the adhesive properties of a surface composition made of materials with thermoelastic phase transformations at various stages of formation: at the stage of the base preparation;...

This paper presents a simulation of the temperature distribution on the surface of a heat exchanger in the ANSYS application package. In the R&D part devoted to the development of a device for converting heat into electrical energy, models of an experimental heat exchanger have been created, including...

The paper is devoted to review of existing aviation fluids, analysing their weaknesses and technology trends create aviation fluids, kerosene, lighter-oiling materials on the basis of modification of petroleum products.

This article presents the results of experimental studies of definition the mechanical characteristics of epoxy resin and hardener without adding nanopowder and with the inclusion of nanopowders. The stability and destruction process of laminated plates made of composite material with different numbers...

Arc metallization of the cored wires is one of the modern surface engineering technologies assuring high quality surface layers. The wire arc spraying process is widely used for protection of metal against corrosion and for restoration of worn parts of machines and mechanisms. The present study used...

The use of distributed generation (DG) plants, which includes renewable energy resources, allows to stabilize voltage levels, reduce losses in networks and to free couplings transfer capacities. Power quality can be enhanced based on DG in railroads power supply systems (RPSS), as well power supply efficiency...

The article is devoted to the issue of a reasonable choice of a vehicle by a consumer on the basis of its aggregated ownership cost. The developed method of estimating the aggregated vehicle ownership cost provides an opportunity to compare different types of vehicles and choose vehicles with the lowest...

In traction power supply systems (TPSS) extreme modes occur in emergency situations with extreme electromagnetic fields (EMF). Short circuit (SC) is one of the extreme modes that lead to considerable current flows in catenary wires with significant growth of magnetic field strengths. SC modes duration...

The article provides analysis of main alternative energy resources and considers some variants for substitution of oil motor fuel with renewable resources. A rational composition of diesel mixed fuel (DMF) is justified for mixtures of plant oils (flax oil, soybean oil, crambe) and petrodiesel in the...

Mathematical apparatus for calculating the road transport operation volume, existing in the modern theory, corresponds to the only technology of the transport process - functioning of the pendulum route with reverse unloaded mileage. However, modern specifics of freight motor transport enterprises functioning...

Rectifier electric locomotives create essential harmonic distortions in tractive electric power supply systems. Because of the higher harmonics, overloads on capacitor banks are possible. Capacitors are a basic element of reactive power sources applied in power supply systems. In case of harmonic increased...

Flight in icing conditions brings significant safety risks due to aircraft aerodynamic performance reduction, stability and controllability deterioration, failures, mechanical damages. For reliable operation in icing conditions active anti-icing/de-icing systems are needed, which entail at the present...

The paper considers climatic and weather specifics of the Arctic, identifying dangerous weather factors with the highest frequency. Specificity of flying in the Arctic and state-of-the-art in flight meteorology are considered. The authors define the tentative approaches to solving tasks in improving...

The paper considers the deposition of metallic particles on the main oil filter of aircraft gas turbine engines (GTEs) depending on the filter parameters. It was shown that the filter presence includes systematic error in the measurement of the mass fraction of wear particles independent of the measurement...

The article analyses the formation of the transport corridor "Lensk - Mirny - Suntar - Nyurba - Vilyuysk - Yakutsk" in the territory of one of the north-eastern regions of Russia - the Republic of Sakha (Yakutia). The justification of the significance of the development of the transport corridor for...

The article presents a conceptual and mathematical model of the intelligent decision support system of the unmanned aerial vehicle operator, what will allow one to make informed decisions in real time with a high degree of reliability.

The article aims to identify the influence of headlight contamination on the stopping distance and allowable speed on roads covered with chemical anti-icing materials at night. Headlight contamination effects were analyzed for determining the maximum allowable vehicle speed on winter roads covered with...

This paper presents the results of theoretical and experimental studies of the joint rigidity of the production equipment in relation to modular structures

In theory, graphics processing units largely exceed central processing units by the degree of performance. But in order to load the GPU with computing tasks to the boundary levels of its maximum performance, the task has to be divided into streams. The number of streams should be comparable to or, to...

An integral element of most radio devices is systems of frequency and signal synthesis. Most of the known circuits use analog elements, which are characterized by the change of parameters under the influence of external factors. However, with the development of digital technology that uses only mathematical...

The article considers free and forced oscillations of a system with six degrees of freedom with symmetrical and asymmetrical mass-inertial characteristics. The conditions of single-frequency oscillations are obtained. Initial deviations and initial velocities must be interconnected through one of the...

The paper deals with the vertical dynamics of the car to ensure the safety of trains, the reliability of the cars and the track. It is accepted that the dynamic model of the car has five degrees of freedom. The complex oscillatory process is divided into separate components: vertical, transverse and...

The actual problem is the outage of rails in the continuous path made by electric contact welding. Among the main causes of the outages are defects of contact-fatigue origin, buckling, wear, and thermomechanical damage. A possibility to use electric arc surfacing to repair defective rails is analyzed.

The results of theoretical study and practical realization of a technical vision system in the production of ceramic tiles are summarized. The possibility of using technical vision during the technological operation to control the absence of defects of ceramic tiles when it moves along the conveyor in...

The article presents the dynamic characteristics of a car with a two-stage spring suspension. The author investigates a system with asymmetric mass-inertial characteristics. Depending on the ratios of the mass-inertia parameters, possible solutions of differential equations are obtained. It follows from...

The approach for a multi-objective selection of fluid power drive based on information of its design, operational and dynamic characteristics is proposed. It uses the optimal Pareto variants of a fluid power drive found at the stage of multi-objective optimization. The operational and dynamic characteristics...

This article discusses the management of the traffic safety subsystem at enterprises engaged in road transport activities. For the successful functioning of industrial enterprises in modern conditions of economic development, along with the growth of production volumes, fewer costs are required. To this...

The article represents the results of investigating the structure of the layers, obtained using the specimens of low-carbon steel, subjected to plasma cementation. The dependence of their structure on the percentage of graphite in the coating, which served as a carbon source, is established. The influence...

The article presents the technical and economic analysis of the investments in new equipment in general or design/ design-technological innovations that depends on an investment budget formation, which determines the net cash flow from the project implementation for the entire exploitation period. We...

The paper describes analysis of the environmental activities state in the industry. Methodology implementation of the three-level models system will not only create a competitive technique and technology with a conscious and controlled quality level for environmental safety and purity, but will also...

This article presents the results of a study of the impact of pulsating gas flow treatment on the durability of the tool used in the production and repair of structural elements of aircraft and aircraft engines.

The profile of the machined surface at the peripheral end milling is made when various types of fluctuations occur. At milling under self-exited oscillations, the machined surface, in addition to traces from cutting in with each tooth, has a wavy profile. The purpose of the article is to consider the...

The article is devoted to the method for calculating carbon dioxide еmissions of cars using vegetable oil as a diesel fuel additive. The method based on the fundamental principles of the theory of automobiles and supplemented by revealed patterns allows for analytical calculation of carbon dioxide emissions...

The article considers the task of controlling a technological vibration machine, designed for the vibration interaction of a granular working medium with details attached to the working body of a vibration machine. The computational scheme of this kind of machine is a solid body on two springs with adjustable...

On the basis of the finite element method (FEM) a mathematical model of the modular structure of the turbomachine exemplified by the aircraft gas turbine engine, AL-31F, is developed. It is notable for describing the solution of interdependent problems of the theory of elasticity and thermal conductivity,...

The article presents a new method for technical preparation of production in digital technology application. This method reduces risks of project, which goes over costs and deadlines. The main achievement is implementing the concept of using CALS-technologies in production technical preparation (PTP)....

Using the example of a three-mass calculating scheme the article presents the results of a study of the effectiveness of using the additional feedbacks synthesized by solving the inverse dynamic problems for a given type of elastic torque to limit the oscillatory motions. In this article, we described...

The viscoelastic plastic model of vibration movement of ore particles along the vibration organ was described. The model includes viscoelastic and elastic plastic blocks. The first one describes elastic deformations of the system and measures energy losses using a damper. The second block describes plastic...

The solution of modern transport planning problems, aimed at improving the quality of transport service for all the users of the city's transport infrastructure, requires application of modeling tools to describe components of urban areas, transport infrastructure and transport behavior. The IrNITU NI...

The article deals with issues related to the impact of road safety on sustainable urban development. We analyzed the territory of the city in order to change the functional purpose of the territories, construction sites, changes in population. A comparison was made of road accidents with transport-town-planning...

The article discusses the principles of the formation of the estimated transportation districts, taking into account special generators of movements that are understood as large objects of mass service of the population, in relation of which, the generation of visits is comparable to the generation of...

The paper discusses methodological issues of improving the efficiency of meteorological support for regional air transportation. The authors provide a justification of the relevance of research aimed at improving the efficiency of meteorological support, taking into account regional features of the formation...

The analysis of the types and consequences of potential defects in engineering products based on the application of the theory of fuzzy sets is considered. The formulas of the corresponding linguistic variables are proposed. The calculation of the risk priority number based on mathematical operations...

The article reviews the possibility to improve efficiency of the cylinders block design and the pumping unit of an axial-piston hydraulic machine by means of utilization of inter-cylinder zones for installing additional chambers smaller in diameter. This design allows to building a new axial piston rotor...

The article reviews the simulation of functional dependence of the heat treatment process time of vermiculite concentrates on their size groups (fractions) in power process units with a mechanical base plate, in which the movement of expanded vermiculite is set by vibro-transporting bulk material in...

The paper deals with ways to process control of forming the surface quality parameters according to a desired law with the help of machining by surface plastic deformation on CNC machines, which allows ensuring the uniformity of surface operational properties when working in conditions of unstable operating...

The paper deals with the possibility of obtaining strong overlap projection welds due to formation of a common annular zone instead of a coin-shaped one as a nugget. A method for reducing the energy intensity of this process by reducing the time of current supply recommended in the literature was identified

The article describes the prospects and problems of creating low-cost unmanned systems for airborne geological prospecting of large areas with a simple topography. A novel electrically-powered unmanned aerial system (UAS) based on a vertical takeoff and landing (VTOL) aircraft was developed for low-altitude...

The automated system is proposed that allows to control and measure forces of engaging and separating electrical connectors. The structure of the mechanical and electrical parts of the developed device is described. The use of the system will increase the productivity and accuracy of the operation under...

Automotive alternators problems constitute about 21 % of total automotive electrical faults. Fault in automotive alternator can cause different implications, ranging from fault in battery accumulator or electronics through road traffic accident. Fluctuation of output voltage is accepted as the main diagnostic...

Repair of agricultural machinery is one of the most important issues related to maintaining the efficiency of the fleet of vehicles used in the agricultural sector of the country. High equipment with high-performance machines and mechanisms obliges modern repair production to raise its technical level...

The article is devoted to the issues of the transportation demand estimation. Existing methods to bring up to date the Origin-Destination matrix are reviewed. A regression method to update the passenger Origin-Destination matrix is proposed. The proposed method is compared with the method of calculating...

The physical process of interaction of the working member of the brush cutter with trees located on the path of the machine movement is considered. In the development of existing ideas set out in the textbooks, the method for calculating brush cutters with a passive working body is refined, based on...

The possibility of increasing the stability of the grinding process of corrosion-resistant steels using titanium alloy mandrels with a low modulus of elasticity is considered. The titanium alloy acts as an artificial damper to facilitate the absorbing of vibrations arising during processing.

Titanium alloys can change their phase composition after abrasive processing. Grinding by CBN wheels affects quantitatively the variation in intermetallic compounds into VT22 that can be experimentally confirmed. These changes are positive or negative, depending on the purpose of the titanium part. X-ray...

In the aircraft industry to obtain the necessary form of long panels and sheaths the shot peen forming is successfully used. Due to impact of shot on the processed surface, the specific microgeometry is formed, the characteristic feature of this microgeometry are the numerous dimples of shot with different...

A platform for analyzing wear metals in oils was developed. It can be used to analyze lubricating oil for the presence of metal chips. The unit is based on the Ohm's law. The results of laboratory tests confirmed the efficiency of this unit for analyzing oils used in engines of construction and road...

Railway facilities in the Northern territories of Russia are built and operated in the areas of the cryolithozone and low climatic temperatures. Railway transport in the Republic has been operating since 1979. In 2004, a 360 km long highway to Tommot was built. Passenger and cargo transportation to Tommot...

A mathematical model of a carriage is presented, describing movement taking into account the geometric non-linearity of displacements and deformations in terms of the body, carriage frames, bolsters and wheel sets. In the design scheme, symmetric linear dimensions can be taken unequal, which allows evaluating...

The increase in the level of motorization in the country leads to an increase in the intensity of traffic on the main highways of settlements. At the intersections of the road network, there are unacceptable, in terms of safety, conflicts of traffic and pedestrian flows. Therefore, the development of...

The problem of parameter estimation of rough surface contact interaction due to 3D modelling of fractal model contact interaction, when they are satisfactory to initial surfaces, is solved. This approach takes into account surface contour basic parameters that are essentially relevant to the results...

The transport system development in Russia is focused on transportation indicators increasing and infrastructure quality. It will ensure the growth of macroeconomic parameters. The article shows the review of some calculation approaches connected with planning parameters of road transportation demand...

Optimal configuration of a regional transport and logistics system should be chosen from the standpoint of the goal of regional development, the environmental component of decision-making, and according to the criteria that determine the advantages and disadvantages of a particular mode of transport....

The present study is devoted to the surface processing technology of 3Х2В8Ф hot-work tool steel and the effect on its operational properties. The surface processing included thermal-chemical treatment (TCT) and surface finishing. Boroaluminizing (joint diffusion with boron and aluminum) was chosen as...

To obtain an appropriate picture of emissions through the aeration lantern of the block based on the location of the experimental area, a flexible shut-off screen was applied together with electrolyzers RA-400. Sampling was carried out along the horizon of the upper edge of the electrolyzer with the...

In this paper, an analysis of world experience was conducted and it was concluded that one of the ways to improve the efficiency of aviation security in the Russian Federation is to use modern network training complexes. A new approach to assessing the competence of aviation security screeners was proposed...

The nature and reasons of two cases of premature failure of engineering products are investigated (metal-composite cylinder for moto fuel and metal rod of bulldozer's hydraulic cylinder). By methods of metallography and fractography with using the basic provisions of metallurgy, physics of metals, physics...

The article deals with the problem of estimating the proportion of individual transport users visiting the focal points of various functional orientations. The factors and strategies of transport policy influencing the proportion of visitors arriving at the focal points by their private transport are...

Options of finding the removal distance of the vehicle from the scene of the pedestrian accident, which came at an arbitrary angle being arbitrary to the vehicle from behind passing obstacle, are considered. Changes in the estimated equations are made. Universal dependences of geometric and kinematic...

When the moist cohesive soil is excavated, the soil sticking and freezing to the working units of the earth-moving machines take place, which considerably reduces their efficiency. There are four main groups of methods intended for eliminating adhesion of soil to the surface of the working bodies of...

The paper presents a method of mathematical modeling of composite and heterogeneous deformable materials used, in particular, in modern aircraft structures, such as MS-21. The technique is based on scanning a deformed body by a computer tomograph, with further mathematical transformation of the information...

Experience in operation of trucks shows a significant increase in a failure number of their systems and parts in natural and climatic conditions of a permafrost zone compared with the conditions of a moderate climate. This article presents a study of operability of the forty MAN F2000 trucks used in...

The purpose of the article is to develop a mathematical model of the power regulator using an A11VO axial-piston pump (Bosch Rexroth) as an example and determine the effect of pressure on the control process parameters. A mathematical model of the regulator was developed; a scheme for its solution in...