scholarly journals Reliability of technical systems and the methodology for calculating MTBF using Flexsim computer simulation

2019 ◽  
Vol 132 ◽  
pp. 01012
Author(s):  
Maciej Kuboń ◽  
Ireneusz Kaczmar ◽  
Pavol Findura
Keyword(s):  
Computer Simulation ◽  
Simulation Model ◽  
Computer Modeling ◽  
Simulation Software ◽  
Machine Failure ◽  
Machine Reliability ◽  
Technical Systems ◽  
And Performance ◽  
The Impact ◽  
Theoretical Foundations

The paper focuses on computer modeling of the reliability of technical systems using FlexSim simulation software. It presents the theoretical foundations of machine reliability and principles of describing this phenomenon. The discussion demonstrates how to estimate the main parameters of reliability analysis - MTBF and MTTR. The end result was designing a simulation model and assessing the impact of machine failure on the productivity and performance of a technical system.

scholarly journals Optimization of Packaging Line Performance: A Case Study of AB Breweries in Nigeria

2018 ◽  
pp. 1-22
Author(s):  
Chinedu James Ujam ◽  
Harold Chukwuemeka Godwin
Keyword(s):  
Simulation Model ◽  
Design Of Experiment ◽  
Production System ◽  
Simulation Software ◽  
Production Performance ◽  
Machine Breakdown ◽  
Fishbone Diagram ◽  
And Performance ◽  
The Impact

This paper presents an approach for improving productivity in breweries. A case study of AB brewery was adopted. Traditionally, packaging line improve  performance and productivity based on extrapolation of past experience, but in recent times, the traditional method could not meet up with high increase in demand of products, hence the need to adopt a new approach of using information technology and software to analyze problems and improving performance. Eleven weeks of the following data were collected and calculated; production outputs and running time; OPI and Target; and Packaging line downtimes. Downtimes were grouped into machine breakdown, planned downtime, and external downtimes and analyzed with histogram to know the impact of each group to the overall downtimes. To apply fishbone diagram, it was further grouped into Material, Method, Man and Machine after which a Pareto graph was plotted to understand the area of focus in tackling production system problems. Tecnomatrix plant simulation software was adopted to develop a simulation model that mimic the real system which further found hidden problems existing within the production system. Design of experiment was carried out to select the best alternatives from the results generated, and finally excel spreadsheet interface was developed for better analysis and performance tracking of optimized system. Result of data analysis indicated that machine breakdown and external downtimes were the major problems affecting performance, while simulation model revealed that unregulated system and un-optimized regulated lines recorded high machine breakdown and speed losses which affected the production performance output respectively. Design of experiment found the best speed combination of sensors to optimize two labellers.

Computer Simulation Applied to Facility Design and Performance Evaluation

1969 ◽  
Vol 6 (03) ◽  
pp. 318-324
Author(s):  
Thomas P. Dunn
Keyword(s):  
Computer Simulation ◽  
Performance Evaluation ◽  
Simulation Model ◽  
Model Output ◽  
Facility Design ◽  
Newport News ◽  
Dry Dock ◽  
Computerized Simulation ◽  
Steel Fabrication ◽  
And Performance

This paper describes how a computerized simulation model was utilized to evaluate initially the design and later the performance of the new Steel Fabrication Shop of the Newport News Shipbuilding and Dry Dock Company. Included are descriptions of the model and its development, the shop, and exhibits which are illustrative of model output.

Effect of Secondary Force on Rigidity of Oil Film of the Slipper Pair Based on Hydrostatic Support

2012 ◽  
Vol 468-471 ◽  
pp. 1380-1383
Author(s):  
Hui Wang ◽  
Yu Xin Wang
Keyword(s):  
Computer Simulation ◽  
Friction Coefficient ◽  
Simulation Model ◽  
Dynamic Characteristics ◽  
Mathematics Model ◽  
Support Structure ◽  
Oil Film ◽  
Work Pressure ◽  
The Impact

Rigidity of oil film is an important hydrostatic support performance of the slipper pair. This paper establishes the mathematics model of hydrostatic support structure on the basis of considering secondary force. And establish the simulation model of rigidity of oil film by using the toolbox of Simulink. Study the dynamic characteristics of rigidity of oil film under the influence of secondary force through computer simulation. And reach a conclusion that the impact of secondary force on rigidity of oil film has a relationship with friction coefficient and work pressure.

Performance Studies on Campus-Wide Focus on FTP, Video and VoIP Ethernet Network

2012 ◽  
Vol 4 (1) ◽  
pp. 49-59 ◽  
Author(s):  
Nuru I. Sarkar ◽  
Kashif Nisar ◽  
Layangi Babbage
Keyword(s):  
Network Model ◽  
Performance Studies ◽  
Asynchronous Transfer Mode ◽  
Simulation Software ◽  
Segment Length ◽  
Campus Network ◽  
Atm Network ◽  
Type Data ◽  
And Performance ◽  
The Impact

The Advanced Network Technologies is research that investigates technology(s) behind today’s modern networks and network infrastructures. One part of this technology being Asynchronous Transfer Mode (ATM). A technology commonly in place in networks all around the world today. This paper focuses on ATM. Dubbed “Modelling and Performance Studies of ATM Networks”; this research seeks to look at and into the “impact of application segment length on the performance of an ATM network” and the “impact of traffic type data on the performance of an ATM network”. To be able to examine an ATM network, the authors need to be able to simulate a network. Thus, for this research, they have used the OPNET Modeler 14.0 Simulation software to create a network model that represents a ATM network. By actually simulating an ATM network at AUT University New Zealand, the authors can therefore change certain variables, and observe the effects the changes have on performance. As stated, one of the impacts that will be explored is the effect that application segment length has on an ATM network. Thus, one variable that will be changed in the authors’ simulation is the segment length. This is the length of each packet segment that is sent through the network for a particular traffic type. The second impact to be inspected is the impact of different traffic types on an ATM network. This network model is based on a campus network. An Application Configuration is setup with default parameters which specify 8 common applications used. Among them the ones that the authors will focus on are VOIP, Video and FTP. A Profile Configuration is setup that will define the 3 applications stated above. A fixed node model of 100BaseT will specify the profile configuration for each scenario and the number of work stations of each scenario.

Analysis of Earthing System Cabinet of Telekom Malaysia

2015 ◽  
Vol 799-800 ◽  
pp. 1249-1256
Author(s):  
David Caulker ◽  
Mohd Annuar Ramli
Keyword(s):  
Computer Simulation ◽  
Simulation Software ◽  
Current Injection ◽  
Soil Conditions ◽  
Soil Resistivity ◽  
Specific Location ◽  
Local Soil ◽  
Local Soil Conditions ◽  
Earthing Systems ◽  
The Impact

This paper investigated the impact on the earthing systems of cabinets of Telekom Malaysia (TM) when subjected to dangerous voltages due to current injection from remote sources. TM have received numerous cases regarding the failures of their cabinets due to power related issues (PRI) as well as lightning. These failures may have occurred partly due to the existing earthing systems installations. This research aims to determine earthing impedance of 5 ohms or less of TM cabinets with respect to local soil conditions. Low impedance earthing is not easy to realize mainly due to the local soil resistivity, layering and structures. To achieve a low impedance of below 5 ohms as per Telekom Malaysia's requirement, three types of earthing electrodes were modelled and simulated using CDEGS computer simulation software. Results have demonstrated that the existing earthing system of 3 rods practice by TM is sufficient for areas of resistivity less than 500ٹ-m. Combination of rectangular and vertical rods for resistivity of 500ٹ-m above is the preferred choice of earthing. Analysis and discussions presented in this study can be used as a guide for TM for their cabinet installations. Results also highlighted that achieving less than 5ٹ does not constitute a safe earthing system. Other parameters have to be taken into account before ascertain which type of earthing to be used in a specific location of a TM installation.

scholarly journals MANAGING RISK WITH THE USE OF COMPUTER SIMULATION

2021 ◽  
Vol 2 ◽  
pp. 17-23
Author(s):  
Monika Bučková ◽  
Miroslav Fusko ◽  
Gabriela Gabajová ◽  
Martin Gašo ◽  
Branislav Mičieta ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Risk Management ◽  
Simulation Model ◽  
Action Plan ◽  
Business Environment ◽  
Global Business ◽  
Risk Management Methodology ◽  
External Risk ◽  
Managing Risk ◽  
The Impact

Internal and external risk management has become an important issue in today's global business environment, which is fraught with health, natural, political, economic and technical threats. This article deals with the design of a methodology for problem-solving and risk management in connection with computer simulation. The risk management methodology proposed by us consists of individual steps, which are summarized into three stages - risk assessment, risk analysis and risk management. The proposed computer simulation methodology consists of several steps, for example creating a parametric simulation model, designing experiments, analysis of the simulation model results or the evaluation of the simulation results. These steps are described in the article. After completing the previous steps, we describe the points of an action plan and what it must contain to avoid consequences and the impact of risks at the lowest possible level. An example of the use of computer simulation is the risk situation associated with the fluctuation of employees. In the end, the proposed methodology is supported by the results of our research and its further direction.

scholarly journals The Impact of New Ways of Working on Organizations and Employees: A Systematic Review of Literature

2021 ◽  
Author(s):  
Karine Renard ◽  
Frederic Cornu ◽  
Yves Emery ◽  
David Giauque
Keyword(s):  
Well Being ◽  
Research Field ◽  
Public And Private ◽  
Work Arrangements ◽  
New Ways Of Working ◽  
And Performance ◽  
Research Stream ◽  
New Research ◽  
The Impact ◽  
Theoretical Foundations

A new research stream emerged in the 2000s dedicated to flexible work arrangements in public and private organizations, called “new ways of working” (NWW). This article aims to examine NWW from both a theoretical and empirical perspective, focusing on outcomes of this new concept and the debate between “mutual gains” vs. “conflicting outcomes.” Through a literature review, it examines this research field’s innovation and its rather vague theoretical foundations. Findings demonstrate that NWW definitions are diverse and somewhat imprecise, leading to fragmented research designs and findings; the research stream’s theoretical foundations should be better addressed. Findings also highlight the current lack of empirical data, which therefore does not allow any real conclusions on NWW’s effects on employees’ and organizations’ well-being and performance.

scholarly journals Analysis of critical machine reliability in manufacturing cells

2019 ◽  
Vol 12 (1) ◽  
pp. 70 ◽  
Author(s):  
Manocher Djassemi ◽  
Hamid Seifoddini
Keyword(s):  
Simulation Model ◽  
Flow Line ◽  
Discrete Event ◽  
Production Capacity ◽  
Business Environment ◽  
Manufacturing Cells ◽  
Machine Failure ◽  
Machine Reliability ◽  
Critical Machine ◽  
Critical Machines

Purpose: In an increasingly competitive business environment, machine reliability problem merits special attention in operations of  manufacturing cells. This is mainly due to flow line nature of the cellular layout, interdependency of downstream and upstream of machines related to each other. This study investigates the effect of critical machine reliability improvement  on production capacity and throughput time in manufacturing cells.  Design/methodology/approach: A discrete-event simulation model was developed to investigate the effectiveness of a reliability plan focusing on the most critical production machines in improving the performance level as an alternative to increasing the reliability of all machines. Four machine criticality policies are examined in the simulation experiments.Findings: The results of this experimental study indicated that an improvement of reliability of a limited number of machines leads to an increase in overall production capacity and speed in cellular manufacturing operations. A reliability plan, that focuses on a set of critical machines, potentially offers a more economical alternative to increasing the reliability of all machines in such facility.Research limitations/implications: The results demonstrate that to achieve higher production capacity and shorter throughput times, managers should consider directing more resources to increase the reliability of critical machines, particularly, those with shorter mean time to failure and higher utilization.Originality/value: The designed simulation model is unique in representing the dynamics of a real world manufacturing cell environment by encoding operational functions such as machine failure, maintenance resource allocation, material flow, job sequencing and scheduling. A new machine availability metric is defined as well. 

From intrapreneurship to entrepreneurship: Is technical expertise sufficient?‐ A case study

2003 ◽  
Vol 6 (1) ◽  
pp. 57-63
Author(s):  
John E. Woodilla
Keyword(s):  
Computer Simulation ◽  
Computer Modeling ◽  
Manufacturing Process ◽  
September 11 ◽  
Simulation Software ◽  
Technical Expertise ◽  
Successful Career ◽  
Consulting Services ◽  
E Mail

Following a successful career in industry, Dr. Douglas V. Shick, a newly minted entrepreneur, established NRS Associates, LLC, to perform consulting services based on two highly technical computer-modeling programs. Doug was heavily involved in the development of one program, an innovative computer simulation software for modeling a particular manufacturing process, through intrapreneurial activity during his corporate experience. Doug established his business on September 1, 2001, and on September 10 announced his services by e-mail to everyone he knew. The unforeseen events of the next day, September 11, produced some unexpected aftereffects that Doug had to factor into his developing business.

scholarly journals Modeling and Performance Improvement of the Constant Power Regulator Systems in Variable Displacement Axial Piston Pump

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Sung Hwan Park ◽  
Ji Min Lee ◽  
Jong Shik Kim
Keyword(s):  
Computer Simulation ◽  
Performance Improvement ◽  
Simulation Software ◽  
Piston Pump ◽  
Axial Piston Pump ◽  
Constant Power ◽  
Power Regulator ◽  
Pressure Area ◽  
And Performance ◽  
Axial Piston

An irregular performance of a mechanical-type constant power regulator is considered. In order to find the cause of an irregular discharge flow at the cut-off pressure area, modeling and numerical simulations are performed to observe dynamic behavior of internal parts of the constant power regulator system for a swashplate-type axial piston pump. The commercial numerical simulation software AMESim is applied to model the mechanical-type regulator with hydraulic pump and simulate the performance of it. The validity of the simulation model of the constant power regulator system is verified by comparing simulation results with experiments. In order to find the cause of the irregular performance of the mechanical-type constant power regulator system, the behavior of main components such as the spool, sleeve, and counterbalance piston is investigated using computer simulation. The shape modification of the counterbalance piston is proposed to improve the undesirable performance of the mechanical-type constant power regulator. The performance improvement is verified by computer simulation using AMESim software.

Sign in / Sign up

Export Citation Format

Share Document