Parameters Of Technical Condition Research Articles

Assessment of the durability of self-propelled agricultural machines using a generalized indicator

Material according to reliability of agricultural machinery and its main indicators which are characterized by measurement of resource parameters of technical condition of details and interfaces is presented in article. The possibility of an assessment of a resource of car/system or the unit is considered, at technical service of cars by means of the generalized coeffi cient characterizing their current technical condition.

ANALYTICS OF ALGORITHM FOR CONTROL OF TECHNICAL CONDITION PARAMETERS OF ON-BOARD SYSTEM OF GRAIN HARVESTER BASED ON PROCESSING OF FAST-CHANGING VALUES

Analytics of algorithm for control of technical condition parameters of on-board system of grain harvester based on processing of fast-changing values

DECOMPOSITION OF FAILURE STATES OF GRAIN HARVESTING COMBINERS

The article discloses methodological approaches to the formation of the validity of the application of the simulation model of the decomposition of failure-free states of combine harvesters. The authors reproduce the functional decomposition of the reliability of grain harvesters obtained through the analysis of system functions. The authors reveal analytical approaches to the question of what the system does, regardless of how it works. As a basis, the authors formed a division into functional subsystems in the community of functions performed by groups of elements. When conducting the experiment, a set of random events that occur with the module under consideration is first generated - the event of failure of the blocked module, the event of activation of the blocking of the module and the event of the transmission of the module. Then, by assigning the corresponding probabilities, states are defined and logical dependencies between them are found. The experiment consisted in the sequential generation of events and obtaining the final states of the functional module. This experiment was repeated several times, then it was calculated, in several cases the functional module of the grain harvester was in good condition. The ratio of the number of experiment results in which the functional module was found to be working to all results shows the possibility of the functioning of the functional module. By performing a certain number of calculations of each state, summing the results of each calculation, taking the true value as one and the false value as zero, and then dividing the result by the length of the set, we obtain the value of the probability of blocked failure calculated by the Monte Carlo method.When performing the calculations and with the original data, it was equal to 0.885. The similarity of the result to the result accepted as true proves the truth. The method given in the article allows to improve the quality of work of the fail-safe system of grain harvesters, providing more accurate failure-free accounting, expanding the list of analyzed reliability parameters and making fuller use of technical means of monitoring technical condition parameters.

Удосконалення методу забезпечення паливної економічності вантажних автомобілів засобами інтелектуальних транспортних систем

The purpose of the study is improving the method of ensuring the fuel efficiency of trucks by means of intelligent transport systems in variable operating conditions. The analysis of the processes of ensuring the operational control of the fuel consumption of cargo vehicles shows the perspective of their implementation on the basis of modern intelligent transport systems, the main tool of which is the method of remote monitoring. Remote monitoring of cargo vehicles is an effective tool designed not only for tracking the location and movement of vehicles, but also for a certain number of parameters of their technical condition. A mathematical model of an improved method of ensuring the fuel economy of trucks has been developed, which includes a process and analytical component for estimating limit values, forming optimal characteristics and forecasting technical condition parameters and fuel consumption by the engine and vehicle in the processes of cargo transportation. The mathematical model is built on the basis of differential and algebraic equations developed at KhNADU (Kharkiv National Automobile and Road University), NTU (National Transport University) and personally by the authors, which was adapted with appropriate changes in the part of the initial data and algebraic equations to improve the existing method. The improved method for determining and calculating the fuel consumption of a vehicle in operating conditions is based on the information and software complex (ISK) "Virtual Mechanic "HADI-12"" and the ISK "Service Fuel Eco "NTU-HADI-12"" of Khnadu.
 As a result, the authors formulated as a general approach to the formation and improvement of the method of ensuring the fuel economy of a cargo vehicle of category N3 in the conditions of operation by means of intelligent transport systems, and actually the processes of solving the set tasks are based on the implementation of the system interaction of three interrelated components: process, information and analytical.

Non-contact Diagnostics of the Tractor Engine via the CAN-Interface

The results of studies on the implementation of diagnostics of a controlled object of energy-saturated agricultural machinery by a non-contact method are presented. It has been proven that non-contact diagnostics of technical condition parameters gives a reliable picture of the possibility of effective technical support of agricultural machinery throughout its entire life cycle, will allow early detection of malfunctions and predict failures, raise the level of technical readiness, reducing the costs of agricultural producers.

Інформаційна система оперативного забезпечення нормування показників експлуатації транспортного засобу

The formation of the method of ensuring the rationing of indicators and management of fuel economy of the vehicle in variable operating conditions by means of operational control on the basis of intelligent transport systems is shown. A systematic approach was used as the methodological basis of the research to solve the tasks set in the work. The general technique of carrying out of scientific research of rationing and fuel economy of the freight vehicle of category N3 in variable conditions of operation by means of operative control on the basis of intelligent transport systems is developed. The target function of the study is a combination of objective and subjective factors of vehicle operation, which ensure minimal fuel consumption. At the same time the minimum task is solved, namely: rationing of operational indicators, fuel economy of the vehicle in the conditions of operation tends to reach the maximum, despite the fact that fuel consumption tends to reach the minimum values. The general approach to the formation of the method of ensuring the fuel economy of the vehicle in variable operating conditions by means of operational control based on intelligent transport systems is formulated. The processes of solving the tasks are based on the implementation of systemic interaction of three interrelated components: process, information and analytical. It is shown that the peculiarity of the method is that it involves the joint use of all available methods and means of obtaining information about the processes of operation of the vehicle, fuel consumption, parameters of technical condition and speed, and so on. Thus, the process of forming a method to ensure the rationing of performance and fuel economy of the vehicle in variable operating conditions by means of operational control on the basis of intelligent transport systems involves clarifying information on fuel consumption, actual technical condition, methods and means of implementation. The article shows that this task on the basis of information about fuel consumption parameters and technical condition can be expressed as a complex function in the implementation of relevant tasks. In the work, a method of determining and calculating the fuel consumption of vehicles in operating conditions was developed specifically for the purpose of researching and justifying the regulation and parameters of fuel economy, the peculiarity of the method is that it involves the joint use of all available methods and means of obtaining information about operational processes vehicles, namely fuel consumption, parameters of the technical condition and speed of the vehicle.

Monitoring of the technical condition of individual resource units and units of utilized agricultural machinery

The article presents the use of machine monitoring as an information basis for a control system for maintenance and repair processes, which improves the use of agricultural machinery and reduces the costs of its operation. Improving the planning and management of maintenance and repair of agricultural machinery based on modern technical means plays an important role in increasing its efficiency of use. It is noted that the use of diagnostic tools allows optimizing maintenance and repair processes. The main methods and means of determining the technical condition of the main units of agricultural machinery were used, such as: instrumental method, visual method, organoleptic methods, resource parameter, limit value of the parameter, structural parameters, technical condition parameters. The advantage of monitoring the technical condition of discarded agricultural machinery using a random check method is the determination of the residual life of individual components and assemblies of the machines.

Assessment of the level of reliability and safety based on the index of the technical condition of the equipment of energy systems

results of evaluation and forecasting of reliability indicators of technological equipment are presented on the basis of a neural network model for calculating fault-free operation indicators taking into account safety indicators of the generating system. In the process of creating a neural network, a topology was developed, a mechanism for training and testing the model was determined. During the study, a sample of input data was created, an algorithm for functioning and data exchange was built. The analysis of statistical data on the joint influence of a number of parameters of technical condition of resource-determining functional units on their index of technical condition, on the general technical condition of the hydraulic unit, which showed that the most confirmed are the joint effect of increasing the pressure difference in the servomotor cavities and increasing the pressure difference in the servomotor cavitation erosion of the blades in the flow part of the hydraulic unit. Multivariate data bases formed by the neural network model, combining the effect of blade turning on the change in the probability of hydraulic power equipment failure, impact of shaft combat on the index of technical condition of the unit “turbine bearing and shaft,” influence of shaft vibration change on index of technical condition of hydraulic power equipment and turbine cover, and taking into account the park life, inter-repair period, accident rate, metal condition should be used to create prognostic models that provide approaches to extending the operable state of elements of hydropower equipment. Obtained results can be used in creation of modern systems of monitoring and diagnostics of power equipment, its separate elements required for collection, storage, archiving of data taking into account actual state of specific element of hydraulic unit for qualitative prediction of indicators of reliability of hydropower equipment in order to increase efficiency of operation of generating and power systems.

Connection of diagnostic parameters with the technical condition of the engine

The paper presents the results of the study experimental verification of theoretical prerequisites and methodological developments to establish the connection of diagnostic parameters with indicators of the technical condition of the engine of the Zavolzhsky Motor Plant. Experimentally, the most informative, in terms of sensitivity and stability of diagnostic signs, diagnostic modes were obtained. The method and technology of differential engine diagnostics have been developed and tested in production conditions. And also in the article the results of the analysis of the obtained data carried out in a complex of laboratory and operational tests, including experimental studies to optimize the speed mode of engine diagnostics when cranking the crankshaft; identification of the effect of valve misalignments and decompression in the engine cylinders being tested at the time of the resistance to cranking and compression resistance; study of the technical condition parameters affecting the moment of resistance to cranking of the crankshaft and compression resistance of the tested cylinders. According to the proposed method, experimental dependences of the change in the torque of the rolling resistance and compression resistance of the internal combustion engine were obtained.

Особливості забезпечення нормування показників і керування паливною економічністю транспортного засобу в умовах експлуатації

The formation of the method of ensuring the rationing of indicators and management of fuel economy of the vehicle in variable operating conditions by means of operational control on the basis of intelligent transport systems is shown. A systematic approach was used as the methodological basis of the research to solve the tasks set in the work. The general technique of carrying out of scientific research of rationing and fuel economy of the freight vehicle of category N3 in variable conditions of operation by means of operative control on the basis of intelligent transport systems is developed. The target function of the study is a combination of objective and subjective factors of vehicle operation, which ensure minimal fuel consumption. At the same time the minimum task is solved, namely: rationing of operational indicators, fuel economy of the vehicle in the conditions of operation tends to reach the maximum, despite the fact that fuel consumption tends to reach the minimum values. The general approach to the formation of the method of ensuring the fuel economy of the vehicle in variable operating conditions by means of operational control based on intelligent transport systems is formulated. The processes of solving the tasks are based on the implementation of systemic interaction of three interrelated components: process, information and analytical. It is shown that the peculiarity of the method is that it involves the joint use of all available methods and means of obtaining information about the processes of operation of the vehicle, fuel consumption, parameters of technical condition and speed, and so on.Thus, the process of forming a method to ensure the rationing of performance and fuel economy of the vehicle in variable operating conditions by means of operational control on the basis of intelligent transport systems involves clarifying information on fuel consumption, actual technical condition, methods and means of implementation. The article shows that this task on the basis of information about fuel consumption parameters and technical condition can be expressed as a complex function in the implementation of relevant tasks.

Analysis of Efficiency of Technical Condition of Heat Exchanger of Spent Fuel Pool Cooling System with WWER-1000 Reactor of Nuclear Power Plant

The main factors affecting the elements of the heat exchanger of the spent fuel pool cooling system during operation are considered. The analysis of design, technical and operational documentation is carried out for the purpose of preliminary assessment of the technical condition of the heat exchange equipment of nuclear power plants. The data on the installed capacity and service life of power units of the Ukrainian NPPs are given. The cooling system of the spent fuel pool with the WWER-1000 reactor, its purpose, as well as the technical characteristics of the system heat exchanger and its schematic representation are described. The potential mechanisms of aging of heat exchanger elements, aging effects, parameters of technical condition and methods of their control are determined. The efficiency of the heat exchanger of the spent fuel pool cooling system is calculated by determining the rating and design heat transfer areas. The influence of the service life of the heat exchanger on the change in the heat transfer area is shown and the assessment of the effective use of the heat transfer area is determined. The main rating parameters are summarized in the table and the analysis of these values is carried out.

Monitoring of the technical condition of MPDF on guidelines for their operation

The efficiency of use and increase the reliability of agricultural machinery depends on the regulatory and technical documentation governing the requirements for its technical condition and operation. The analysis of the existing normative-technical and guiding documents on ensuring the reliability of means for preparation and distribution of fodder is given. To effectively carry out maintenance and repair of means for the preparation and distribution of feed should know: the criteria for disability; maximum and permissible parameters of technical condition; indicators of the transition of equipment from working to inoperable condition. The article presents the monitoring of instructions for maintenance and operation of machines, guide materials for use from the standpoint of their informativeness on the implementation of reliability requirements. Monitoring of technical condition was carried out for foreign samples of means for preparation and distribution of feed with horizontal mixing and grinding mechanisms. The mechanisms are analyzed from the standpoint of the availability of information about the features of the structure, the characteristic faults and failures, the main ways to restore efficiency. Ensuring reliability includes several activities throughout the life cycle. The main provisions for assessing the technical condition and improving the reliability of machines when using guide materials. The provisions include: information on the reliability of machines, mechanisms, working bodies; periodicity of maintenance and repair of machines, restoration of working bodies; information on the complexity of maintenance and repair of machines, restoration of working bodies; schemes of assembly and disassembly of mechanisms; information on typical failures and the sequence of their elimination; information on the limit state criteria; technologies for the restoration of working bodies; information on installation requirements. The current normative documents of the system of general technical requirements for the means for the preparation and distribution of feed do not fully meet the organizational and methodological aspects of ensuring their reliability.

Developing the Test Bench Software for the Technical Inspection of Volumetric Hydraulic Drives

Introduction. The article describes the test bench specialized software, developed for technical inspection of domestic and foreign volumetric hydraulic drives in repair enterprises and service centers. The results of bench tests using a hydraulic bench and software are presented. Materials and Methods For the application software development, G graphical programming language of the Laboratory Virtual Instrumentation Engineering Workbench (Lab- View) programming environment developed by the National Instruments Company has been used. The reliability of the results obtained has been confirmed by a series of bench tests of domestic and foreign volumetric hydraulic drives. Results. There has been developed and implemented new test bench software for the technical inspection of hydraulic drives of different models from domestic and foreign manufacturers in repair plants and service centers. The software is used to capture, process and store data from the sensors during testing, to calculate and output measurement data, to conduct nonlaboratory analysis of the testing process in graphical, textual and video formats, to calibrate sensors, and to store the test results in the electronic library system. The specialized software runs under the Microsoft Windows 7 x86 (32-bit) operating system and is installed on a personal computer of the hydraulic bench data processing unit. The developed software is characterized by the ergonomics of the user interface, the ability to control all the parameters of diagnosing the tested volumetric hydraulic drives. Discussion and Conclusion. Specialized software and the test bench permit high accurate monitoring of all technical condition parameters of the most common domestic and foreign volumetric hydraulic drives in accordance with the requirements of the manufacturers in the repair enterprises and service centers.

Diagnostic method and device for evaluating and forecasting the technical condition of farm machinery in operation

The paper discusses methods and ways to diagnose the technical condition of agricultural machines and harvesters, existing practices, and approaches to get reliable data on the current health of the machinery used. The device for assessing and predicting machines’ technical condition includes software and technical means developed with virtual technologies to measure diagnostic parameters of the machinery. The main device elements are digital sensors with physical modifiers (pressure, temperature, medium composition and motion sensors, a-d converters with signal amplifiers), software to configure data gathering, and output to conduct analyses and produce recommendations. The core of the present approach is the technology of virtual prediction of breakdowns by changes in the technical condition parameters. It is based on modular devices, software with an interface that collects and processes data and provides a complete set of failure diagnostics and forecasting. The given method based on a device operating in the information and communication network increases farm machinery’s performance. Furthermore, it reduces operating costs due to the prevention of expensive breakdowns, individual forecasting, and scheduled maintenance of machines in operation. The approach under consideration was applied in the laboratory of digital engineering technologies of the Bashkir State Agrarian University Republic of Bashkortostan of the Russian Federation. The given work is aimed to boost the efficiency of the farm machinery diagnostics and maintenance system by applying a virtual breakdown prediction technology to conduct an automated evaluation, registration, and analysis of a machine’s condition. It can be achieved by developing software and technical means to register data and their structure systematization.

Algorithm for calculation of reliability indicators based on monitoring of technical condition parameters

Material by definition of local indicators of reliability of self-propelled farm vehicles, on the basis of monitoring of the controlled resource parameters used for definition of technical condition of the equipment is presented in article. The main dependences when calculating local indicators of a resource are given, examinees of cars/knots/interfaces.

Assessment of the durability of self-propelled agricultural machines

Material according to reliability of agricultural machinery and its main indicators which are characterized by measurement of resource parameters of technical condition of details and interfaces is presented in article. The possibility of an assessment of a resource of car/system or the unit is considered, at technical service of cars by means of the generalized coefficient characterizing their current technical condition

Technical condition of agricultural machinery

Two basic functions of the machine, consumer and technical are given. Application the law of conservation of energy is shown in case of the description of an energy balance of an element of the machine. The expanded concept of technical condition in relation to the machine is this, parameters of technical condition are justified. Communications of technical condition with operability and working capacity and also communication of operability of an element of the machine with its efficiency are defined. The possibility of representation of technical condition in the form of сlass in object-oriented programming is revealed.

Transport Vehicle Maintenance Optimization

The successful maintenance of transport vehicles in operable condition is facilitated by the proper assessment of their technical condition and forecasting its changes. The efficient operation of vehicles is only achieved if the changes in the engine load in the forecast cause changes in the dynamics of technical condition parameters. Besides, forecasting can help reduce vehicle repair costs. The forecasts are based on vehicle component, assembly, and subsystem failure statistics over a certain period. We must understand that the overall failure values include both gradual and sudden ones. While classifying failures as gradual or sudden when performing repairs is not challenging, forecasting sudden failures is quite difficult. We suggest failure forecasting methods based on the statistical sampling and in line with the following assumptions: Gradual failures are associated with the intensive operation of vehicles and their changes are proportional to the changes in vehicle operation duration. Sudden failures do not depend on the vehicle workload but have an inverse effect on it: the more sudden failures there are, the less useful work vehicles can perform. Thus, it is possible to describe the changes in gradual and sudden failures over time. It can expand the theoretical understanding of vehicle operation and provide repair forecasting tools to operators and maintenance companies.

Evaluation of the reliability of self-propelled vehicles using a generalized indicator

Material according to reliability of agricultural machinery and its main indicators which are characterized by measurement of resource parameters of technical condition of details and interfaces is presented in article. The possibility of an assessment of a resource of car/system or the unit is considered, at technical service of cars by means of the generalized coefficient characterizing their current technical condition.

Hardware complexes for technical control of technical condition parameters of self-propelled sprayers

The main indicator used for reliability research is hardware systems of technical control of parameters of technical condition of self-propelled sprayers, which means the probability that a self-propelled sprayer will be operational at any time, except for planned periods during which the use of self-propelled sprayers is not expected. Derivation of analytical expression for hardware systems of technical control of parameters of technical condition of self-propelled sprayers is a rather time-consuming operation. The complexity increases with the complication of the graph, ie in an effort to take into account more technical conditions, factors that affect the process of technical control of self-propelled sprayers. Therefore, it is advisable to solve the problem of such a plan using a simulation model. Using the stateflow modeling tool of the MatLab software package, a model has been developed that allows modeling discrete-event models. Model of self-propelled sprayers among Stateflow for estimating the coefficient of readiness during technical control of programs. The results of simulation modeling are the values of hardware complexes of technical control of parameters of technical condition of self-propelled sprayers in various technical control programs, which allows to draw conclusions about the influence of technical control program of self-propelled sprayers on the readiness factor. It is quite justified in cases when the technical control differs only in the place of measurement of the parameter of technical condition, and the means of measurement are the same. The author found that the hardware systems of technical control of the parameters of the technical condition of self-propelled sprayers are sensitive to errors of the second kind in this case. Ways of further research are found in the study of other programs of technical control of self-propelled sprayers, in which the readiness factor is sensitive to the probability of errors of the first kind.