The article deals with the problem of optimal control of the train (OKT) from the standpoint of the modern theory of automatic control. This problem is relevant for many years, but to date it has not been completely solved, due to the large number of random factors affecting the nature of the train, as well as the development in recent years of high-speed and high-speed, as well as heavy and long-range traffic. The mathematical model of train movement and formulation of the OKT problem are presented, the classification of known methods of its solution is offered. A simulation model in Matlab/Simulink environment is developed, which allows to study different models and control laws. A metaheuristic algorithm for optimization of train operating modes using a simulation model implemented in the form of a software module in Matlab is proposed. The results of computational experiments confirming the convergence of the algorithm are presented.
Keywords: optimal control, autodriving, mathematical model, simulation model, metaheuristic algorithm
The selective method of calculation because of the profitability is successfully applied several centuries. However when calculating non-failure operation in case of fatigue failures (often sudden) when there is a considerable sedate communication of m=10-15 for the supermulti-cycle field of loading between durability (hardness, an endurance limit) and the operating tension, decrease in the minimum resource of details will make 10-100 and more times. It turns out because of an unaccounted main part of population. In our example of 104-50=9950 pieces of such details, i.e. their potential refusals. Therefore for this case a selective method – the intermediate stage of calculations.
Keywords: selection, fatigue resource, population of final volume, sedate communication
Considered the importance of end-to-end technologies in the logging industry. Considered the importance of creating geographic information systems that allow rational development of leased forest areas taking into account the requirements of the forest legislation of the Russian Federation and minimizing the cost of a unit of harvested wood, in order to increase profits for logging enterprises.
Keywords: forest taxation, aerial photography, forest use, forest preparation, end-to-end technologies, geo-information systems
Abstract: The analysis of the operational work of the district station Salsk in terms of increasing the volume of freight traffic in the direction of Kotelnikovo-Tikhoretskaya-9km.Developed measures to promote the development of infrastructure and improve the technology of the station and ensure the passage of the growing volume of freight trains. The estimation of the economic efficiency of the station in the conditions of implementation of the proposed measures.
Keywords: Key words: station, analysis of work, capacity, problems, activities, technology, economic efficiency
Environmentally friendly approach to energy consumption implies planning the resources' amount which could be delivered and utilized by the end user. For the resource provider this means being able to get remote data from a huge number of users, with further data analysis being performed to predict future consumption. The main objective of this work was a comparison of classical regression analysis methods with neural network analysis for solving a household energy consumption prediction problem. Research was based on an array of energy consumption data collected from 47 households situated in the Rostov region (Russia) over a period of 730 days. We investigated the forecasting models based on statistical regressing of 1-st, 2-d and 3-d order and a recurrent neural network (the best result we achieved had been given by a neural network with one hidden layer of 10 neurons). Forecasting time-frame was 20% of the data-set (nearly three months) and 80% we used for training. For our data the best result was achieved by a neural network where the ratio error of the forecast practically didn't exceed 5% (mean ratio error was 0.22 and standard deviation of 3.7). For the regression models these terms were 0.37 and 6.24 for the 1-st order, 3.31 and 6.45 for the 2-d order, 0.29 and 6.7 for the 3-d order model respectively. As a result of this work we determined, that rather simple recurrent neural network provides a better result in terms of energy consumption prediction in comparison with classical regression analysis methods, though more complex networks, such as LSTM, need a wider data array to learn.
Keywords: energy resources, metering device, housing and communal services, energy consumption forecasting, data analysis, regression, time series, recurrent neural network, machine learning, “smart city”
The most popular types of statistical analysis are considered. The article focuses on the analytical review of statistical methods, advantages and disadvantages. The stages of a statistical survey of a technological object are shown. Using the example of studying the mechanical part of a gas pumping unit, the advantage of using statistical methods is shown.
Keywords: statistical analysis, technical diagnostics, petrochemical complex, gas pumping unit, distribution, minimum risk method, minimum error method, minimax method, Neumann – Pearson method, maximum likelihood method
The objectives of improving production efficiency and product quality are relevant for any enterprise. One solution to this issue may be to optimize the processes of automation of production processes in enterprises. This article proposes a solution that will allow you to design the most optimal routes for network connections at all levels of the process control system, which in turn will provide significant resource savings and thus increase the efficiency of automation processes in enterprises.
Keywords: efficiency improvement, graph theory, automated process control system (APCS), graph frame, optimization methods
The paper considers the bioreactor for cultivation of Chlorella microalgae. The indicators of the process quality and the description of the bioreactor design are given. The computation of the transfer function of the system to maintain the temperature of water in the main tank by the method of Rotach is calculated
Keywords: automation, bioreactor, biotechnology, Chlorella, system of regulation, transfer function calculation, Rotach method
The article is devoted to the study of the impact of information technology on the organization of labor protection. The applied significance of the research is that modern approaches to the organization of labor protection imply a wide use of information technologies. Informational support of labor protection is an important part of a systematic approach to ensuring safety, improving working conditions and reducing occupational risks. The paper describes the economic efficiency of creating an information and analytical system for labor protection. In the course of the system research, the main functions were identified that should be implemented by the information system using modules. Considered 6 main objectives of the study.This work is relevant due to the fact that the results of the study can be used in higher education institutions to optimize their work. The author analyzed the result of the study, noting the importance of introducing an information and analytical system for labor protection in connection with its practical and economic feasibility for higher education institutions with a large number of employees and, consequently, with a large amount of information that needs daily processing and analysis.
Keywords: information and analytical system, labor protection, module, injuries, social policy, information technologies
Describes the process of processing applications single user support services (UPCS), jsco «RZD», presented the objectives of the project. Are the standard time for work performed in the UPS. A model for evaluating the timeliness of processing applications, UPS created users software package. Assess the appropriateness and timeliness of information from UPCS users. The smallest probability of timely information UPS during the day will be observed from 8.00-9.00 am on Monday and from 17.00-19.00 p.m. on Friday. The optimal number of service channels for the stated criteria for timeliness of processing applications is 7
Keywords: information technology, UPS, ITSM, treatment, timeliness, processing, registration, circulation model UPS, channel services, ITC
The article discusses the scientific and practical aspects of the process of implementation of BIM-technology in the construction industry. The analysis of risks of implementation of information modeling technology based on the experience of Russian companies, ways to reduce it, formulated the main provisions and advantages of the introduction of BIM-technologies using the methodology of project management.
Keywords: project management, BIM-technology, risk, information modeling, project team, project life cycle
The poor quality of construction products is one of the main problems of the construction industry. A defect may occur at any stage of the product life cycle. The reputation of a company and its place in the market depends on how the company has established the process of management of non-conforming products and a dialogue with the consumer. In this article the method of management of quality "8D" which is capable to reveal not only the reasons of failures, but also to prevent their emergence further is considered, that is realizes one of the principles of quality management – continuous improvement.
Keywords: technique, quality, consumer, improvement, failure, defect, enterprise, products, ISO, group, principle, construction, metal, fencing
The article identifies tasks that can be solved by robots for agricultural purposes. Held the problem statement for robotics irrigation machines (DM) type "Frigate" due to the fuzzy control of technological processes of watering, allowing you to control the irrigation rate during the entire irrigation season regardless of the various uncertain factors that affect the quality of irrigation. Proposed to be used by DM crane-preselection analog operation, working by electricity, the fuzzy will be managed by improved control system, as well as to enter into the system management subsystem diagnostics, including sensors for measuring soil moisture and slope of DM in different parts of the field. The mathematical model of fuzzy control irrigation machine due to the software regulation of water flow depending on the topography of the field, the speed of movement of the machine across the field and soil moisture to reduce water consumption and improve the efficiency of DM. As the fuzzy logic algorithm the proposed algorithm of Mamdani, which is easily implemented in MATLAB based on the knowledge and experience of experts, and simulation. Formalization of the description of the performance of the machine carried out with the help of linguistic variables, given the type and description of elements of term-sets of these variables. The proposed mathematical model can be used when designing control systems for other robotic farm machinery.
Keywords: robotic irrigation system, fuzzy control, mathematical model, algorithm of fuzzy inference, linguistic variable, term set of a linguistic variable, basic variety
The relevance of the study is due to the risk of poisoning officials of customs authorities and other types of state control, inspecting sea containers at customs checkpoints. Based on the analysis of international experience in ensuring safety when working with sea containers, the development of organizational and technical principles for the prevention of poisoning during the customs inspection was carried out. The materials of the article are of practical value for officials of customs authorities and other types of state control at sea checkpoints that inspect sea containers.
Keywords: fumigants, sea containers, harmful chemicals, gas analysis. Security
The problems of formation of object models of urban transport systems to adequately reflect the essential object-relationships to achieve management goals. Technical and technological aspect submission sites solve the problems of reliability and sustainability of the transport system, the economic - solves problems of reducing losses in the organization of transport and passenger flows, socio-economic - reducing the environmental impact on the environment, road safety. Held presentation variant analysis object models with different target installation in optimal control problems.
Keywords: The object model, the transport system of the city, optimal control, traffic safety, traffic management
The use of modern innovative control systems for heat supply in the housing and communal services is the task of today. Within the framework of the program of energy-saving technologies, an automated system for monitoring and controlling the parameters of the coolant in the housing and communal services is proposed. The proposed system is based on industrial controllers with Ethernet 100 Base-T, RS-232 and RS-485 interfaces and software created in the freely distributed version of the Owen CoDeSys package.
Keywords: shut-off valve, shut-off and control valves, CoDeSys, proportional-integral-differentiating controller, pipeline fittings
The aim of the study is to develop static analysis algorithms, to search for all possible sequences of function calls leading to a certain point in the program. To achieve this goal the explicit call graph is analyzed, in which all possible paths between two vertices are searched. The analysis is carried out in two stages: 1) at the preparatory stage, a new graph is constructed based on the call graph, from which excess vertices and arcs are removed; 2) in the second stage, a search is made in the new graph for possible paths from the root node to the given one. Also this paper provides an experimental comparison of the developed algorithms with the closest analogue, the Yen algorithm.
Keywords: static program analysis, call graph, path searching algorithm, Yen's algorithm, call stack
The analysis of the existing management systems for investment and construction projects showed that the organizational and technological models used for the development of the calendar plans are static and do not reflect changes in the course of real-time work that does not allow synchronizing the terms of production and supply of resources and leads to significant losses in use of manpower and construction machinery. The adaptability of organizational and technological models in the developed intellectual building management system is ensured through the use of special algorithms and models for disaggregating planned and aggregating actual information on work, calculating deviations of actual characteristics from planned values, developing and making decisions to bring the model to the organizational and technological normality in real time mode
Keywords: management of investment and construction projects, organizational and technological models, adaptive systems, intelligent management systems, operational management of the construction site, pace of work
In this paper, we evaluate the water meters available on the market, their advantages and disadvantages are given. The classification of water meters and the assessment of their specific application are given. The main problem at the moment in measuring the flow of water resources is the accuracy of measurement on all flow ranges without a significant increase in the price for the retail sale of the meter. It is shown that the most problematic zone of the range is the minimum and drop rate. The second most important is the maximum flow rate and the accompanying hydraulic shock (in the case when the transition time from zero flow to maximum is negligible). The paper noted that at the moment there are no accounting devices on the market that solve both problems described. It is also shown that it is possible to make the meter more attractive to the consumer with the help of additional (not metrological functions). For example, an important function is the signaling of long-term leaks in the system.
Keywords: water meter, counter, measuring vane, acoustic
At the moment one of the most advanced flexible methodologies IT project management is SCRUM technology. Its feature is the partition of the whole work on short iterations (sprints), each of which represents a cyclic process, repeated all the way through the product development process. This allows you to constantly monitor the emerging risks and minimize them effects. Each sprint starts with planning, which sets the pace of work and stimulates high performance. The key point of planning is predicting the level of focus of the team on the implementation of the tasks, the so-called focus factor. It is the ratio productivity to labor intensity. The paper presents the results of numerical experiments to identify the best methods for predicting this indicator. In their the production data of one of the project groups of the real commercial firm in the field of IT. Extrapolation forecasting methods with a sliding base on the previous actual results. At the same time, the width of the base one to seven previous periods), and the type of extrapolating function. Approximating polynomials of zero, first and second degree are considered. Attention has also been paid to the method of exponential smoothing and Bayesian approach to diagnosis and prediction. For the integral the quality of forecasting used the value of the root-mean-square relative performance error. According to the results of the experiments, three optimal variants are selected. The first is the forecast for the sliding arithmetic average of the actual focus-factors for 3-4 previous periods. In the second variant, again, the sliding the average of actual focus factors for 3-5 sprints, but not arithmetic, and geometric. The third method for predicting is the product theoretical focus factor on the actual. We use the geometric mean it per the 1-2 sprints. In the mean square norm for both methods, the prediction error is the same, about 5.8%. If we estimate it not by the mean square metric, but by maximum deviation, then the latter option is slightly better. Results are intended to clarify the intuitive planning of sprints when performing real projects.
Keywords: management, IT-project, SCRUM technology, sprint planning, forecast, focus factor, moving average, linear and quadratic regression, exponential smoothing, Bayesian approach, root-mean-square error, the best possible option
The article deals with the application of methods of artificial intelligence to control robots. The concept of a layered intelligent control system for mobile robots, in which proposed to build an intelligent control system of three levels, based on patterns of thinking and categorizing tasks according to the level information is presented. In the circuit of the proposed system circulating upwards and downwards flows, the management of the system at their level, and some of the information is summarized and passed to the higher level of environmental assessment, then, as a result of detail gradually from the strategy behavior to the commands of the executive bodies of the robot are driving down when selecting the solution for travel or other any actions of a mobile robot. The functional-structural diagram of the system and the design principles and hardware implementation of this system on the basis of the mobile robot multilevel computing system are given.
Keywords: artificial intelligence, new information technology, mobile robot, intelligent robot, intelligent control system, the concept of tiered computing system
Set out the main stages of development of the automated system of operational control in railway transport, the issue of the effectiveness of this system. Describes methods to improve efficiency, a model of the processing of information flows
Keywords: automated system of operational control in railway transport, road-network database, a table of the current status information message, the transport system, thematic table, efficiency, rail transport
The review of ways of welding of elements of bodies of cars is carried out. Merits and demerits of spot contact welding and a way of welding with use of the high-concentrated power sources are considered. The processes which are taking place in a zone of a welded seam when using laser welding are in details considered.
Keywords: metal welding, welded seam, laser welding
Discusses the development of information technology in providing freight transport. Elements of modern technology that increases the efficiency of transportation. Introduction in the production process of automated information systems. Achieve full economic transparency and investment attractiveness of the organization. The process of implementation of information technologies needed today, and what's more, inevitable, due to the increase in volumes subject to data processing. The use of such information technologies will allow the shipping company to interact with various types of technical and software components of information systems, as well as give the possibility to eliminate the intermediate links through the integration of information flows, the globalization of logistics systems.
Keywords: production, enterprise, transport, efficiency, information system, automation, transport technology, transportation, Internet, modern appliances
The serial peripheral interface (SPI) based on current logic, in which due to current mirrors stable to voltage supply and operation of transistors in the active mode, increased reliability and resistance to destabilizing factors are considered. The circuit design of D-flip-flops and the results of simulation on a 0.25 μm CMOS process are given. In the developed device, current consumption adjustment is realized with an external resistor, and external load resistors allow to select the necessary amplitude of the output signal.
Keywords: current logic, SPI, serial peripheral interface, linear algebra