FME Transactions最新文献_第4页

Thermal insulation coating using natural stone powder-epoxy composite for room temperature reduction 保温涂料采用天然石粉-环氧树脂复合材料进行室温还原

FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2304457b

Redi Bintarto, Anindito Purnowidodo, Widodo Dwi, Marco Talice, Djarot Darmadi

引用次数: 0

Design a new hybrid controller based on an improvement version of grey wolf optimization for trajectory tracking of wheeled mobile robot 设计了一种基于改进灰狼优化的轮式移动机器人轨迹跟踪混合控制器

IF 1.6

FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2302140h

R. Hussein

{"title":"Design a new hybrid controller based on an improvement version of grey wolf optimization for trajectory tracking of wheeled mobile robot","authors":"R. Hussein","doi":"10.5937/fme2302140h","DOIUrl":"https://doi.org/10.5937/fme2302140h","url":null,"abstract":"Nonholonomic wheeled mobile robots are considered to be multi-input multi-output systems that are performed in varying environments. This work presents the trajectory tracking control of a nonholonomic wheeled mobile robot (WMR). The Kinematic and the dynamic models of the robot were derived. A new hybrid controller was designed, which consisted of two controllers based on an optimization algorithm to solve the trajectory tracking problem. The first controller is the Fractional order PID controller, which is based on the kinematic model and has been applied to control the linear and the angular robot velocities, while the second controller is a linear quadratic regulator (LQR) and is based on the dynamic model used to control the motors' torques. A new, improved version of grey wolf optimization wasadopted to tune the parameters of the hybrid controller. The main goals of this improvement are rapid convergence towards a solution, reducing the effect of the wolves' random motion, and balancing exploitation and exploration processes. MATLAB software was used to simulate the results under an S-shape trajectory and to evaluate the robustness and performance of the proposed control unit. The simulation results demonstrated the adopted control system's activity and efficiency based on the mean square error (MSE) between the desired and actual trajectory. The values of MSE of trajectory in the X and Y directions and the orientation are [6.589*10-4(m) 8.421*10-5(m) 0.00401(rad)]T . Also, the adopted control system can generate smooth values of the control input signals without sharp spikes. The performance of the presented control system has been verified and compared with the results obtained from the other two control systems, and the simulation results have offered the superiority and effectiveness of the hybrid controller of this work.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"1 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83634754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Static behaviour of functionally graded rotating cantilever beams using B-spline collocation technique 基于b样条配置技术的功能梯度旋转悬臂梁的静力性能

IF 1.6

FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2303347c

Shashi Chichkhede, D. Mahapatra, Shubhashis Sanyal, Shubhankar Bhowmick

引用次数: 0

Theoretical model of high-speed tracked vehicle general motion 高速履带车辆一般运动理论模型

IF 1.6

FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2303449m

S. Milićević, I. Blagojević

引用次数: 0

Differences in Kaizen implementation between countries and industry types in multinational supply chain 跨国供应链中不同国家、不同行业改善实施的差异

IF 1.6

FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2302183s

V. Spasojević-Brkić, B. Tomić, Martina Perišić, Nemanja Janev

{"title":"Differences in Kaizen implementation between countries and industry types in multinational supply chain","authors":"V. Spasojević-Brkić, B. Tomić, Martina Perišić, Nemanja Janev","doi":"10.5937/fme2302183s","DOIUrl":"https://doi.org/10.5937/fme2302183s","url":null,"abstract":"Previous research shows that Kaizen's benefits are multiple and evident, but its practices in the supply chain have been sufficiently examined now. Conversely, we are witnessing numerous issues in contemporary global supply networks. In this survey, after conducting a literature review, three research questions regarding Kaizen modes of usage were formulated and tested on the sample of 195 enterprises that are part of the global supply chain, located in 31 countries, and active in two different types of industries - aircraft, and transportation. A combined approach containing descriptive statistics, reliability, factor analysis, and statistical hypothesis testing by Kruskal-Wallis one-way ANOVA and Mann-Whitney U tests were used. Results show significant differences between Kaizen practices applied in countries such as Italy, the United Kingdom, Canada, the USA, Japan, and China, where national and corporate cultures differ. Kaizen implementation significantly differs between companies operating in the aircraft and transportation sectors, which is unsurprising since aircraft industry has a higher formalization level. The goal to determine the differences in Kaizen practices around the globe was fulfilled since statistically significant differences indicate the importance of the contextual factors and connect adverse and Kaizen events.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"15 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76711119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical investigation of single and multiple impinging synthetic jets on the flow field and heat transfer at low orifice-to-plate distances 低孔板距离下单、多碰撞合成射流对流场和传热的数值研究

IF 1.6

FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2303273e

Eda Ergur, T. Calisir

引用次数: 0

Empirical equation of the Mach number as a function of the stagnation pressure ratio for a quasi-one-dimensional compressible flow 准一维可压缩流马赫数随滞止压力比的经验方程

IF 1.6

FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2302149t

S. Tolentino

引用次数: 1

Springback optimization for CNC tube bending machine based on an artificial neural networks (ANNs) 基于人工神经网络的数控弯管机回弹优化

IF 1.6

FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2303405k

Somchai Kongnoo, K. Sonthipermpoon, Kielarova Wannarumon

{"title":"Springback optimization for CNC tube bending machine based on an artificial neural networks (ANNs)","authors":"Somchai Kongnoo, K. Sonthipermpoon, Kielarova Wannarumon","doi":"10.5937/fme2303405k","DOIUrl":"https://doi.org/10.5937/fme2303405k","url":null,"abstract":"Predicting the springback angle has become the major production problem among tube benders. Springback is where the tube on a mandrel-less rotary draw bending tends to bounce back after being bent when the clamps are released. Accurately predicting the springback angle is crucial for effective tube bending. Machine learning (ML), a popular prediction approach, was applied to functions such as prediction or function approximation, pattern classification, clustering, and forecasting. To achieve this, the springback angle values from 27 experiments were collected and used as input into artificial neural networks (ANNs) in one area of ML. This research was conducted to study the optimization of the springback angle when bending ASTM A-210 Gr. A1 seamless tube with an outside diameter of 44.45 mm, using the 4 input factors Wall Thickness, Bending Radius, Dwell Time, and Bending Angle. The results showed that all factors significantly influence the springback angle in the tube bending process; different prediction methods were analyzed by comparing the results using different activation functions. The results showed that the optimal neural network architecture is 4-98-1; these results were achieved using the Sigmoid function, giving the lowest mean squared error (MSE) = 0.001892. The resulting coefficient of determination (R2 ) = 99.42%, the ReLU function R2 = 98.99%, the TanH function R2 = 98.53%, and the Identity function, which was 79.53%. It was also found that the best prediction of the springback angle using the best regression equation, with R2 = 82.32%, was better than the prediction using the 65 neurons with the Identity function R2 = 79.53%, a 2.79% difference in favor of the regression equation.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"128 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79565822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact shock events in multimodal container transshipment for packaging testing 用于包装试验的多式联运集装箱转运中的冲击事件

IF 1.6

FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2302161n

Z. Németh, P. Böröcz

引用次数: 0

An analysis of causal relationships among challenges impeding adoption of Industry 4.0 through DEMATEL technique 通过DEMATEL技术分析阻碍工业4.0采用的挑战之间的因果关系

IF 1.6

FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2302262b

Vaibhav Bisht, V.G. Sridhar, M. Janardhanan

{"title":"An analysis of causal relationships among challenges impeding adoption of Industry 4.0 through DEMATEL technique","authors":"Vaibhav Bisht, V.G. Sridhar, M. Janardhanan","doi":"10.5937/fme2302262b","DOIUrl":"https://doi.org/10.5937/fme2302262b","url":null,"abstract":"Industries must be more innovative than ever before to face rising global competition and stay in the market today. These now aim to enhance operational efficiency by using different advanced technology tools and techniques of Industry 4.0, satisfying the varying customer needs with products of the highest quality offered at minimal costs. With different bottlenecks faced in industrial operations, the large-scale adoption of such systems faces multiple impediments relevant to the country's socioeconomic make-up, and therefore, nine pertinent barriers deterring India's transition to Industry 4.0 with varying interdependencies and importance are identified. Data collected from multiple industry experts is subsequently analyzed using the DEMATEL (Decision Making Trial and Evaluation Laboratory) technique to identify the key barriers having the biggest influence over India's industrial landscape based on their cause effect value and importance scores. The study conclusively ends with discussing the analysis findings for use in solving complex industry problems and identifying new roles, work environments, and skills required in different domains for the adoption of systems of Industry 4.0 in India.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"103 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75660513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1