scholarly journals Residual life management of cyber-physical transport systems

2021 ◽  
Vol 2094 (4) ◽  
pp. 042008
Author(s):  
S V Susarev ◽  
S P Orlov ◽  
O Ja Kravets ◽  
A S Ponkratova
Keyword(s):  
Simulation Model ◽  
Residual Life ◽  
Statistical Tests ◽  
Transport Systems ◽  
Agricultural Vehicles ◽  
Remote Diagnostics ◽  
Virtual Commissioning ◽  
Robotic Vehicle ◽  
Diagnostics System ◽  
Timed Colored Petri Nets

Abstract The article deals with the problem of assessing the residual life of robotic agricultural vehicles. This problem is inextricably linked to the organization of effective vehicle maintenance. The robotic vehicle has a multifunctional remote diagnostics system, which makes it possible to assess the probability of component failure in real-time. In virtual commissioning, simulation is the most appropriate tool for researching and finding effective maintenance solutions. A simulation model based on timed colored Petri nets is proposed. The structure of the model is given, and its modules are described. Research is carried out by the method of statistical tests on a simulation model. An example of evaluating the delays in executing a production task, depending on the maintenance procedures and the probabilities of robotic vehicle unit failures, is given.

scholarly journals Virtual tests of robotic vehicle units for virtual commissioning

2021 ◽  
Vol 29 (1) ◽  
pp. 46-57
Author(s):  
Sergey P. Orlov ◽  
Elizaveta E. Bizyukova ◽  
Anastasia E. Iakovleva
Keyword(s):  
Test System ◽  
Operating Conditions ◽  
Design Work ◽  
Agricultural Vehicles ◽  
Virtual Test ◽  
Measuring Devices ◽  
Virtual Commissioning ◽  
Essential Components ◽  
Kamaz Truck ◽  
Robotic Vehicle

The creation of robotic vehicles for agricultural purposes is a promising direction in the automotive industry. The complexity of the self-driving truck's design, work in difficult operating conditions, and a large number of measuring devices and processing subsystems determine the relevance of creating a virtual test system. These tests are part of the overall virtual commissioning process for a robotic vehicle. The article discusses a set of basic subsystems that provide virtual tests based on a model-based approach: mathematical modeling, measurement modeling, information subsystem with databases, visualization and documentation subsystem. Metrological models of measuring channels for virtual tests have been developed, allowing simulating random vehicle parameter changes. The testing process covers all the most essential components of a robotic vehicle. For example, the article presents a dynamic model of the braking system of a robotic chassis and shows the results of braking modes' virtual tests. The developed virtual test system is used to create a KAMAZ truck as part of a robotic system for agricultural vehicles.

scholarly journals Use of simulation model for measurement of MilkRun system performance

2019 ◽  
Vol 9 (1) ◽  
pp. 600-605 ◽  
Author(s):  
Gabriel Fedorko ◽  
Martin Vasil ◽  
Michaela Bartosova
Keyword(s):  
Simulation Model ◽  
Production Systems ◽  
Operational Performance ◽  
Transport Systems ◽  
Indirect Methods ◽  
Operational Characteristics ◽  
Wide Range ◽  
Effective Operation ◽  
And Performance ◽  
Plant Simulation

AbstractIntra-plant transport systems within their operation directly impact on the performance of production systems. For their effective operation, it is, therefore, necessary to realize evaluation of operational performance and effectivity. For the realization of this type of evaluation, in addition to a wide range of sensors that can be difficult for installation and operation, we can also use indirect methods that are equally able to provide reliable operational characteristics. Indirect analytical methods are presented above all by the approach which is based on the use of simulation methods. The method of computer simulation provides a wide range of options for the evaluation of efficiency and performance. The paper describes the use of a simulation model created in the program Tecnomatix Plant Simulation for analyzing the supply of production workplaces within the MilkRun system.

scholarly journals Simulation modeling and analysis of job release policies in scheduling an agile job shop with process sequence dependent setting time

2017 ◽  
Vol 7 (1.1) ◽  
pp. 177 ◽  
Author(s):  
K.T. Vinod ◽  
S. Prabagaran ◽  
O.A. Joseph
Keyword(s):  
Simulation Model ◽  
Job Shop ◽  
Statistical Tests ◽  
Setting Time ◽  
Performance Criteria ◽  
Analytical Models ◽  
Due Dates ◽  
Priority Rules ◽  
Work In Process ◽  
Sequence Dependent

This paper analyses the effects of job release policies, priority scheduling rules and setup times on the performance of a dynamic job shop in a sequence dependent setup time environment. Two job release policies namely, immediate job release and job release based on a specified work-in-process are investigated. A simulation model of a realistic manufacturing system is developed for detailed analysis. The dynamic total work content method is adopted to assign the due dates of jobs. Six priority rules are applied for prioritizing jobs for processing on machines. Several performance criteria are considered for analyzing the system performance. The simulation results are used to conduct statistical tests. Analytical models have been formulated to represent the simulation model for post-simulation studies. These models are found to yield a satisfactory estimation of the system outputs.

scholarly journals Masivo: Parallel Simulation Model Based on OpenCL for Massive Public Transportation Systems’ Routes

Electronics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 1501
Author(s):  
Juan Ruiz-Rosero ◽  
Gustavo Ramirez-Gonzalez ◽  
Rahul Khanna
Keyword(s):  
Simulation Model ◽  
Transport System ◽  
Public Transport ◽  
Public Transportation ◽  
High Performance ◽  
Simulation Models ◽  
Transportation Systems ◽  
Transport Systems ◽  
Public Transport System ◽  
Speed Up

There is a large number of tools for the simulation of traffic and routes in public transport systems. These use different simulation models (macroscopic, microscopic, and mesoscopic). Unfortunately, these simulation tools are limited when simulating a complete public transport system, which includes all its buses and routes (up to 270 for the London Underground). The processing times for these type of simulations increase in an unmanageable way since all the relevant variables that are required to simulate consistently and reliably the system behavior must be included. In this paper, we present a new simulation model for public transport routes’ simulation called Masivo. It runs the public transport stops’ operations in OpenCL work items concurrently, using a multi-core high performance platform. The performance results of Masivo show a speed-up factor of 10.2 compared with the simulator model running with one compute unit and a speed-up factor of 278 times faster than the validation simulator. The real-time factor achieved was 3050 times faster than the 10 h simulated duration, for a public transport system of 300 stops, 2400 buses, and 456,997 passengers.

scholarly journals Enterprise growth simulation model

2020 ◽  
Vol 175 ◽  
pp. 12006 ◽  
Author(s):  
Ilona Avlasenko ◽  
Lyudmila Avlasenko ◽  
Isa Peshkhoev ◽  
Yuri Podkolzin ◽  
Oksana Savelyeva
Keyword(s):  
Simulation Model ◽  
Random Process ◽  
Random Function ◽  
Statistical Tests ◽  
Random Variables ◽  
Small Enterprise ◽  
Working Capital ◽  
Loan Rate ◽  
Probability Of Bankruptcy ◽  
Annual Working

Simulation mathematical model of small enterprise functioning is under analysis in this article. It is assumed that annual working capital profitability and loan rate are random variables with normal distribution, the amount of borrowed capital does not exceed the amount of own working capital. Given the value of its working capital at the beginning of time, its dependence on time is constructed as a random process. The parameters of random variables are estimated based on the processing of statistical data on the previous activities of this enterprise. The implementation of the random process is statistically modeled. With the help of the statistical tests, implementations of random function of growth of own working capital are built and the probability of bankruptcy is estimated as relative frequency of cases of adoption of negative value by random function. It is proposed to use the built simulation model of the enterprise to estimate the probability of bankruptcy of the studied enterprise in the coming period (a given number ofyears).

USE OF THE SIMULATION OF INVESTIGATION TRANSPORT PROCESSES

2015 ◽  
Vol 2 (2) ◽  
pp. 813-819
Author(s):  
Нургалиев ◽  
E. Nurgaliev ◽  
Кесова ◽  
Yu. Kesova
Keyword(s):  
Simulation Model ◽  
Transport Processes ◽  
Transport Network ◽  
Real System ◽  
Transport Systems ◽  
Qualitative And Quantitative ◽  
Simulation Based ◽  
Quantitative Characteristics ◽  
Graphic Work ◽  
Qualitative And Quantitative Characteristics

Simulation - a method of research, where the studied system is replaced with a model that describes the real system. The simulation-based transport systems is modeling of random phenomena. As a result of the simulation model are obtained qualitative and quantitative characteristics of the graphic work of the blocks describing the various elements of the transport network

scholarly journals Model of Supplying Equipment System Based on the Assessment of the Residual Resource of Mining Drilling Rigs Components

2019 ◽  
Vol 105 ◽  
pp. 03006
Author(s):  
Fares Abu-Abed
Keyword(s):  
Simulation Model ◽  
Residual Life ◽  
Spare Parts ◽  
Operating Conditions ◽  
Drilling Process ◽  
Queuing Systems ◽  
Standard Values ◽  
Complex Mechanisms ◽  
Drilling Rigs ◽  
Equipment System

The structure of the rig includes many complex mechanisms -their wear, and the value of the residual life depending on it, directly depend on the operating conditions of the rig. In compliance with all the norms and technical conditions of drilling and the absence of abnormal situations in its process, all components must develop their resource, defined by technical conditions, after which they need to be replaced. When various types of complications and abnormal situations occur in the drilling process, the load on the drilling machinery mechanisms can increase dramatically, which does not necessarily lead to the drill failure, but it affects the residual life of those mechanisms and components, the loads that exceed the standard values. With subsequent occurrences of similar situations in the drilling process, this may lead to failure of the drill. The article presents the rationale for choosing a simulation model for organizing a system for supplying drilling rigs with spare parts and accessories based on the theory of queuing systems. The work is an integral part of previously published developments presented in the materials of articles in 2-nd and 3-rd International innovative mining symposiums (2017-2018).

Semi-automatic generation of a virtual representation of a production cell

2018 ◽  
Vol 66 (5) ◽  
pp. 372-384 ◽  
Author(s):  
Suthida Thongnuch ◽  
Alexander Fay ◽  
Rainer Drath
Keyword(s):  
Simulation Model ◽  
Automatic Generation ◽  
High Fidelity Simulation ◽  
Simulation Tools ◽  
Geometry Model ◽  
Development Lifecycle ◽  
Virtual Commissioning ◽  
3D Geometry ◽  
Behavior Description ◽  
Production Cell

Abstract Nowadays there are commercial tools and academic solutions that support and contribute to Virtual Commissioning (VC). However, the main obstacle which hinders the broader application of VC in practice is the modeling time and effort required to create a proper simulation model. The modeling is also separated from the current project development lifecycle. This paper presents a semi-automatic method to transform the 3D geometry model of a production cell into a simulation-enabled virtual representation (i. e., a high fidelity simulation model of the cell). The geometry is combined with dynamic behavior which is a behavior description modeled intuitively based on VDI 2860. The entire method is embedded into a virtual commissioning workflow and is exemplified by a production cell with conveyors. Several commercial modeling and simulation tools are used and combined in the workflow to demonstrate the applicability. The presented methodology bases on AutomationML.

scholarly journals Features of automatic conveyor loaders and their use in creating a simulation model of container terminal development

2020 ◽  
pp. 169-174
Author(s):  
А.С. Свистунова ◽  
Д.С. Хасанов
Keyword(s):  
Simulation Model ◽  
Working Conditions ◽  
System Performance ◽  
Container Terminal ◽  
Truck Drivers ◽  
Transport Systems ◽  
Software Environment ◽  
Container Transport ◽  
Automation Tools ◽  
Safe Working

С ростом количества контейнеров, перевозимых морскими судами, выросли общемировые объёмы контейнерных перевозок. Для повышения эффективности переработки контейнеров используют схемы с разбивкой складской площади со штабелями контейнеров на равные части. Перспективным направлением развития указанных транспортных средств является разработка автономных роботизированных транспортных систем. Используются автоматизированные транспортные платформы (AGV) или автоматизированные транспортёр-погрузчики (ALV). Преимуществами автоматизации контейнерных перевозок на терминале является реализация безопасных условий работы для докеров и водителей грузовиков. Было проведено сравнение возможностей АGV и ALV. Сравнение энергопотребления автоматических транспортеров-погрузчиков. Характеристики кранов, используемых при обработке контейнеров. Функциональные возможности рассмотренных автоматических транспортеров-погрузчиков были использованы при создании имитационной модели в программной среде AnyLogic. В результате проведенного моделирования можно сделать вывод о возможности значительного увеличения работоспособности системы. Для эффективной реализации указанных преимуществ необходимо использовать имитационное моделирование функциональных процессов контейнерного терминала, позволяющее выбрать научно обоснованный вариант развития и внедрения в практическую деятельность перспективных средств автоматизации. With the increase in the number of containers carried by sea vessels, the global volume of container traffic has increased. To increase the efficiency of container processing, use schemes with a breakdown of the warehouse area with stacks of containers into equal parts. A promising direction for the development of these vehicles is the development of Autonomous robotic transport systems. Automated transport platforms (AGV) or automated conveyor loaders (ALV) are used. The advantages of container transport automation at the terminal are the implementation of safe working conditions for dockers and truck drivers. The capabilities of AGV and ALV were compared. Comparison of energy consumption of automatic conveyor loaders. Characteristics of cranes used for handling containers. The functionality of the considered automatic conveyor loaders was used to create a simulation model in the AnyLogic software environment. As a result of the simulation, we can conclude that a significant increase in system performance is possible. To effectively implement these advantages, it is necessary to use simulation of functional processes of a container terminal, which allows you to choose a scientifically based option for the development and implementation of advanced automation tools in practice.

Integrated modelling method of bonding strength and residual life prediction for selective repair structure of aluminium alloy

2022 ◽  
pp. 095440622110631
Author(s):  
Yashi Liao ◽  
Xuhui Zhang ◽  
Zhineng Wang ◽  
Miaolei He
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Simulation Model ◽  
Bonding Strength ◽  
Residual Life ◽  
Integrated Modelling ◽  
Zone Method ◽  
Integrated Simulation ◽  
Utilisation Efficiency

To accurately describe and predict the overall strength and residual life of selective repair bonded structures, an integrated simulation model of crack propagation including bonding strength is established. Based on two methods, an integrated simulation model including a cohesive zone method model for predicting the residual life of a selective repair structure is established. By comparing the computational efficiency and accuracy of both the stress intensity factor and residual life of selective repair structures using different calculation methods, the modelling scheme is optimised. Based on this optimised scheme, the effect of adhesive thickness on the stress intensity factor and residual life of the repair structure is analysed. FM94 adhesive measuring 0.2–0.4 mm thickness is used to decrease the stress intensity factor and improve the remaining life such that material utilisation efficiency is guaranteed.

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