World Journal of Engineering and Technology最新文献_第5页

Research on Collision Response of Titanium Alloy Cylindrical Pressure Shell 钛合金圆柱压壳碰撞响应研究

World Journal of Engineering and Technology Pub Date : 2020-09-07 DOI: 10.4236/wjet.2020.84046

Lin Wang, Xiang Jiang, Lei Huang

引用次数: 1

Contribution to the Control and Command of a Quadrirotor with Six Degrees of Freedom in an Urban Environment 对城市环境中六自由度四旋翼飞行器的控制和指挥的贡献

World Journal of Engineering and Technology Pub Date : 2020-09-07 DOI: 10.4236/wjet.2020.84059

Ndzana Jean Calvin, Yeremou Tamtsia Aurelien, Mane Mane Jeannot, Assiene Mouodo Luc Vivien, Nkotto Akono Cyrille

{"title":"Contribution to the Control and Command of a Quadrirotor with Six Degrees of Freedom in an Urban Environment","authors":"Ndzana Jean Calvin, Yeremou Tamtsia Aurelien, Mane Mane Jeannot, Assiene Mouodo Luc Vivien, Nkotto Akono Cyrille","doi":"10.4236/wjet.2020.84059","DOIUrl":"https://doi.org/10.4236/wjet.2020.84059","url":null,"abstract":"The objective of this article is to make a contribution relating to the \u0000modeling, control, simulation and stabilization of a complex system, with six \u0000degrees of freedom of a particular drone which presents many advantages and \u0000challenges. On the technological, military, political and other levels with an \u0000enormous and beneficial social contribution, it is a quadrotor which is a nonlinear, strongly \u0000coupled and unstable system. Such a structure is difficult to master, because the control is \u0000multivariable in the sense that six degrees of freedom are to be controlled \u0000simultaneously and operating in an environment subject to disturbances. Two \u0000commands, in particular Backstepping and PID, will be applied to obtain the \u0000stabilization of the quadcopter at the desired values, in attitude and in \u0000altitude. This article presents the comparative results of the performance of \u0000the quadcopter under the two controls. The effect of the parameters of each \u0000command on the response time of the system is elucidated under the \u0000Matlab/Simulink environment. For a simulation time of up to 10 seconds minimum \u0000with a less good response time of almost 2 seconds for the PID control, these results prove the \u0000robustness of the Backstepping command.","PeriodicalId":344331,"journal":{"name":"World Journal of Engineering and Technology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130911839","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

Effect of 3D Printing Technology on 3C Product Manufacturing 3D打印技术对3C产品制造的影响

World Journal of Engineering and Technology Pub Date : 2020-09-07 DOI: 10.4236/wjet.2020.84051

G. Shang, Chunhua Sun

{"title":"Effect of 3D Printing Technology on 3C Product Manufacturing","authors":"G. Shang, Chunhua Sun","doi":"10.4236/wjet.2020.84051","DOIUrl":"https://doi.org/10.4236/wjet.2020.84051","url":null,"abstract":"3D printing technology, as one of the most subversive technologies in the 21st century, processes the entity through layer by layer superposition. It breaks through the design constraints and adapts to customized production with high flexibility, which is an important direction of industrial development in the future. 3C product has a very board application market and groups, so it has been widely valued over the world. The advantages of 3D printing technology are very suitable for the characteristics of 3C product, such as diversification, small-volume, personalized. Here, the impact of 3D printing technology on manufacturing industry is firstly discussed; 3C product manufacturing system integrated with 3D printing is finally put proposed. The advantages of the proposed system possess shorter manufacturing cycle, supply chain and logistics. It makes easier to realize personalized 3C product, localized manufacturing and reduce cost. The development and wide application of 3D printing technology in 3C product industry will make the manufacture of low-cost small batch or even individual customized products into a general mode towards the trend of “light luxury + light customization”.","PeriodicalId":344331,"journal":{"name":"World Journal of Engineering and Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123615957","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: 2

The Influence of Centrifugal Force on the Interference Fit of High-Speed Electric Spindle 离心力对高速电主轴过盈配合的影响

World Journal of Engineering and Technology Pub Date : 2020-09-07 DOI: 10.4236/wjet.2020.84058

C. Ding, X. Qi, Zhenghua Gao, Lei Chang

引用次数: 0

Discussion on Road Traffic Problems and “Public Transport Priority” Policy in the Macau Peninsula 澳门半岛道路交通问题及“公共交通优先”政策探讨

World Journal of Engineering and Technology Pub Date : 2020-09-07 DOI: 10.4236/wjet.2020.84044

Ziwei Huang

引用次数: 0

Contribution to the Optimization of the Transient Stability of an Electric Power Transmission Network Using a Universal Power Flow Compensator Controlled by a Three-Stage Inverter 基于三相逆变器控制的通用潮流补偿器对输电网暂态稳定优化的贡献

World Journal of Engineering and Technology Pub Date : 2020-09-07 DOI: 10.4236/wjet.2020.84048

Koko Koko Joseph, N. N. Léandre, N. Salomé

{"title":"Contribution to the Optimization of the Transient Stability of an Electric Power Transmission Network Using a Universal Power Flow Compensator Controlled by a Three-Stage Inverter","authors":"Koko Koko Joseph, N. N. Léandre, N. Salomé","doi":"10.4236/wjet.2020.84048","DOIUrl":"https://doi.org/10.4236/wjet.2020.84048","url":null,"abstract":"The use of an electrical network as close as possible to its limits can lead to its instability in the event of a high amplitude disturbance. The damping of system oscillations can be achieved by conventional means of voltage and speed regulation but also by FACTS (Flexible AC Transmission Systems) devices, which are increasingly used in power networks. In this work, optimal control coordination between a hybrid power flow controller and a three-level inverter was used to improve the transient stability of a transmission line. The UPFC is a combination of a serial compensator (SSSC) and a parallel compensator (STATCOM) both connected to a DC-LINK DC bus. The SSSC acts as a voltage source for the network and injects a voltage that can be adjusted in phase and amplitude in addition to the network voltage; the STATCOM acts as a current source. The approach used is tested in the Matlab Simulink environment on a single machine network. Optimal controller tuning gives a better transient stability improvement by reducing the transport angle oscillations from 248.17% to 9.85%.","PeriodicalId":344331,"journal":{"name":"World Journal of Engineering and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115153658","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

Theoretical Study of Coupling Mechanism between FBG and Shock Waves of Rock Burst 地压冲击波与光纤光栅耦合机理的理论研究

World Journal of Engineering and Technology Pub Date : 2020-09-07 DOI: 10.4236/wjet.2020.84057

S. Wei, Zesheng Zhang, Yao Wang

引用次数: 0

Improvement of LEACH Algorithm Based on Inter-Cluster Ring Routing Strategy 基于集群间环路由策略的LEACH算法改进

World Journal of Engineering and Technology Pub Date : 2020-09-07 DOI: 10.4236/wjet.2020.84056

Quanquan Xiao, Xingming Hou

{"title":"Improvement of LEACH Algorithm Based on Inter-Cluster Ring Routing Strategy","authors":"Quanquan Xiao, Xingming Hou","doi":"10.4236/wjet.2020.84056","DOIUrl":"https://doi.org/10.4236/wjet.2020.84056","url":null,"abstract":"Wireless Sensor Network (Wireless Sensor Network, \u0000WSN) is a self-organizing network formed by a large number of wireless sensor \u0000nodes through radio communication [1]. The \u0000sensor nodes in the network cooperate with each other to monitor and collect \u0000the object information in the observation area, and the information is \u0000transmitted to the users who need this information after data fusion \u0000processing. It is often deployed in harsh environments, such as oceans, deep forests, and deserts. At the \u0000same time, the sensor nodes in the network are powered by batteries [2]. These \u0000external factors make it impossible to replace batteries manually. Therefore, \u0000energy is an important resource for wireless sensor networks [3]. In \u0000this paper, aiming at the problems of LEACH inter-cluster communication, from \u0000the perspective of energy saving, an improved strategy using inter-cluster ring \u0000routing is proposed. This strategy first abstracts all sensor nodes into a ring \u0000system model during the network topology formation stage. In the data transmission \u0000stage, a ring transmission strategy is adopted, and nodes on the ring are used \u0000to randomly and evenly undertake data transmission tasks, so the imbalance of \u0000energy consumption of sensor nodes can be effectively reduced. Simulation \u0000experiments show that this strategy can extend the network life cycle to a \u0000certain extent.","PeriodicalId":344331,"journal":{"name":"World Journal of Engineering and Technology","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127212912","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: 3

Differences between the Geotechnical Campaigns at Front-End Engineering Design (FEED) and Detailed Design—A Case Study 前端工程设计(FEED)与详细设计中岩土工程活动的差异—个案研究

World Journal of Engineering and Technology Pub Date : 2020-09-07 DOI: 10.4236/wjet.2020.84041

E. Spyropoulos, A. Khan

{"title":"Differences between the Geotechnical Campaigns at Front-End Engineering Design (FEED) and Detailed Design—A Case Study","authors":"E. Spyropoulos, A. Khan","doi":"10.4236/wjet.2020.84041","DOIUrl":"https://doi.org/10.4236/wjet.2020.84041","url":null,"abstract":"This paper presents a case study of the geotechnical conditions encountered within a project at Saudi Arabia at both the Front-End Engineering Design (FEED) and Detailed Design geotechnical campaigns. The soil formations were considerably varied between the two investigations resulted in extensive ground improvement activities that have not been anticipated within the FEED stage. The overall objectives of such study are to explore the soil formations found, and to evaluate/summarize the soil treatment measures necessary for each of the two different campaigns in order for the project specifications in relation to settlement, bearing capacity, and liquefaction potential to be achieved. Moreover, the potential factors that may have affected the differences on the strength/density of the soils within the two different geotechnical campaigns that have been carried out at nearby locations are also explored. Based on the analysis conducted, it is concluded that soil strength on the FEED data ismuch higher compared to the strength on the Detailed Design soil data resulted on shifting the soil mitigation measures from light to severe, hence, leading to project both excessive cost and considerable increase on time schedule.","PeriodicalId":344331,"journal":{"name":"World Journal of Engineering and Technology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130705533","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

Image J Analysis of Six Different Annealed Temperatures of 0.17% C of HSLA Steels 图J 0.17%℃HSLA钢六种不同退火温度的分析

World Journal of Engineering and Technology Pub Date : 2020-09-07 DOI: 10.4236/wjet.2020.84043

N. Emordi, Iweriolor Sunday, Onyekpe Basil Obimma

{"title":"Image J Analysis of Six Different Annealed Temperatures of 0.17% C of HSLA Steels","authors":"N. Emordi, Iweriolor Sunday, Onyekpe Basil Obimma","doi":"10.4236/wjet.2020.84043","DOIUrl":"https://doi.org/10.4236/wjet.2020.84043","url":null,"abstract":"Annealing is a heat treatment procedure in which the mechanical properties of a material are being altered, and such alterations cause changes in its properties such as strength and hardness. It is usually carried out to improve ductility and toughness, to reduce hardness and to remove carbides. This study deals with the use of image analysis processing method for the measurement of structure of six annealed samples of 0.17% High Strength Low Alloy (HSLA) Steels (840°C - 990°C) with 30°C interval and 30 minutes soaking time. From the optical microscope images using Image J program, some parameters like calculation of area, pixel value statistics, distances and angles measurements, edge detection, such as the circularity, ferret angle, solidity and perimeter, average area and the percentage area were examined. The annealed sample of 960°C gave the highest grain count of 543 with a perimeter of 41.518; standard deviation 7.057 and a mean of 28.722 which shows that annealing greatly improved the fatigue life of the steel. From the mechanical analysis result, the annealed sample at 840°C has a highest hardness value of 129.4 BHN and gave the lowest impact value of 58.75 J. This study shows a significant decrease in the hardness value as the annealing temperature increased which signifies that annealing temperature enhanced the fatigue property and tensile strength (wear strength) of the steel in study.","PeriodicalId":344331,"journal":{"name":"World Journal of Engineering and Technology","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129093305","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