Simulation Model and Comparative Analysis of Production Resources in a Modified Assembly Process

Author(s):  
Alexander Eierle ◽  
Luis Daniel Otero ◽  
Luz Ortega
2017 ◽  
Vol 13 (3) ◽  
pp. 68-78
Author(s):  
A. A. Pavlov ◽  
I. O. Datyev ◽  
M. G. Shishaev

Simulation is the main way for testing technologies in the field of multi-hop wireless networks (MWN). Creating a simulation model MWN - a time-consuming task associated with the use of specialized software tools, called network simulators. In this paper, the modern experience of modeling MWN and the main problems are formulated. One of the main problem is the comparative analysis' impossibility of the experiments results conducted by various researchers. This is due to the reasons associated with the models used for testing, the planning an imitation experiment and the principal differences in the network simulators. To solve this problem, authors propose a generalized conceptual model of MWN simulation and a specialized software package that automates the execution of experiment series in a heterogeneous modeling environment.


2020 ◽  
pp. 230-234
Author(s):  
N.V. Vodolazskaya

The article analyses the technological features of assembly of important types of joints, which include group threaded connections. Taking into account the requirements of the joint sealing, the forces in the fasteners for the case of multistroke tightening are calculated. The procedure for loading these parts at the fi rst and subsequent rounds for different values of relative compliance of joint parts is proposed. The calculation versions and the results of comparative analysis of analytical and experimental studies are given.


Author(s):  
І.О. Ушакова

Computer modeling is a method for solving the problems of analysis or synthesis of a complex system based on the use of its computer model. Simulation, as a component of computer modeling, allows you to construct most of the possible states of the analyzed system. In this way it allows to correct the processes of assembling machines in a minimum time and with minimal costs, to foresee possible risks and to avoid unreasonable decisions regarding the organization of processes, to reduce material costs. Simulation gives the best results for modeling uncertain or probabilistic systems. Simulation, as a component of computer modeling, gives the best results for modeling systems with uncertainty or with a probabilistic nature. Mathematically calculating all possible variants of the system’s behavior is a laborious task, and using average values in the calculations gives inaccurate results. For assembly production systems, simulation modeling is used to select the optimal production organization parameters. The aim of this work is to build a computer simulation model that allows you to evaluate the impact of production factors (number of employees, operating parameters and type of assembly process) on the assembly process and substantiate the effectiveness of the model. The current assembly process of the machine was considered for modeling. The assembly process includes: two streams of verification, synchronization of request from these two streams, and a machine collection stream. The vacated line starts servicing the application that entered the system earlier than others. Such a discipline is called “earlier entered - earlier served” (FIFO - First In - First Out).s from flows, and a machine assembly flow. An optimization experiment was carried out after the construction and verification of the simulation model. The maximum value of profit was chosen as the objective function. Iterations were performed during an optimization experiment. The optimal number of employees was selected for two inspection flows and a machine assembly stream in the assembly shop. The first experimental result showed the effectiveness of the request flow synchronization method. The following optimization experiment showed the relationship between the number of workers in certain threads of the assembly process and profit. The results of using agent-based models for simulation can be used to optimize assembly processes.


2021 ◽  
Vol 11 (1) ◽  
pp. 887-895
Author(s):  
David Strnad ◽  
Gabriel Fedorko ◽  
Patrik Ščavnický

Abstract The efficiency and effectiveness of the production system are influenced by the logistical arrangement of material flows. The smooth production, especially for assembly lines in the required quantity and at the required time (JIT or JIS systems), is currently ensured by automatically controlled towing sets (logistics trains), which consist of a tractor and several trucks. Another factor that affects the smooth production of assembly lines is the system of controlling the circulation of transport units. The number of transport units used in combination with the transport system significantly affects the efficiency of assembly workplaces. This article presents an analysis of the supply of assembly workplaces using a system of two shuttle boxes. The aim of this article is to investigate the influence of transport speed and capacity on the smoothness of the assembly process. Within the described analysis, the transport of 50,000 components is analyzed using a simulation model, while the length of the transport route is 32 km and 65 transport units per shift are used.


2022 ◽  
Vol 129 ◽  
pp. 114478
Author(s):  
Piotr Ciszewski ◽  
Mariusz Sochacki ◽  
Wojciech Stęplewski ◽  
Marek Kościelski ◽  
Aneta Araźna ◽  
...  

2018 ◽  
Vol 224 ◽  
pp. 01114 ◽  
Author(s):  
Oleg Filipovich ◽  
Vadim Kopp

The process of one-parameter selective assembly of two parts is considered. Methods for reducing the probability of sorting errors are given. It is suggested to perform the sorting process according to the values of the parameter estimates. For this estimate, a recursion algorithm (the Kalman filter) is used in each cycle. In the environment of GPSS World, a simulation model of selective acquisition and assembly of two parts for determining the parameters of the assembly process is constructed. Comparative modeling results are presented that prove the effectiveness of the algorithm for estimating parameters for selective assembly. The variants of using the algorithm and the prospects for further research are suggested.


ÈKOBIOTEH ◽  
2020 ◽  
Vol 3 (3) ◽  
pp. 418-423
Author(s):  
A.N. Kolobov ◽  
◽  
E.Ya. Frisman ◽  

One way to increase the productivity of artificial forestation is to control the density and relative position of trees. In this regard, there are tasks of finding the optimal planting schemes to obtain the maximum wood stock of a given diameter. Based on the developed simulation model, a comparative analysis of the productivity of spruce stands with different planting schemes was carried out. The optimal forest planting schemes for spruce stands, which provide the maximum stock of small, medium and large wood, are determined. It is shown that in order to maximize the stock of wood of different size classes, different initial planting densities are required. The higher the size classes of the grown wood, the lower the optimal planting density.


Sign in / Sign up

Export Citation Format

Share Document