International Journal of Engineering and Technology Innovation最新文献_第10页

Propulsion Performance Analysis of Wave-powered Boats 波浪动力船的推进性能分析

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International Journal of Engineering and Technology Innovation Pub Date : 2020-04-01 DOI: 10.46604/ijeti.2020.4276

Z. Chang, Chao Deng, Jiakun Zhang, Zhanxia Feng, Zhongqiang Zheng

{"title":"Propulsion Performance Analysis of Wave-powered Boats","authors":"Z. Chang, Chao Deng, Jiakun Zhang, Zhanxia Feng, Zhongqiang Zheng","doi":"10.46604/ijeti.2020.4276","DOIUrl":"https://doi.org/10.46604/ijeti.2020.4276","url":null,"abstract":"With the development of oceanographic research and marine environment protection, mobile marine platforms are applied for ocean observation for a long journey. Wave-powered boats are capable of applying wave motion to propel itself and make a long-duration survey. This paper presents the dynamics of the wave-powered boat under the excitation of the heave motion and pitch motion. Taking the wave-powered boat with double fins as an example, the heave and pitch motions of the boat are obtained by ANSYS-AQWA firstly. Then the relationship between propulsion performance and three factors, including wave height, wave period, and restoring stiffness of torsion spring, was analyzed through multibody dynamics software ADAMS. With the increase of sea state from level 1 to level 4 the average propulsion speed increased from 0.4m/s to 1.4m/s. Under the same wave height and period, with the increase of restoring stiffness of torsion spring from 0.0125N·m/deg to 0.3N·m /deg, the propulsion speed of the wave-powered boat increases first and then decreases, and there exists an optimum stiffness. Through the calculation it is found that when the restoring stiffness of torsional spring is increased from 0.025N·m /deg to 0.2N·m /deg with the sea state level 1 to 4, the wave powered boat has better propulsion performance.","PeriodicalId":43808,"journal":{"name":"International Journal of Engineering and Technology Innovation","volume":"10 1","pages":"121-129"},"PeriodicalIF":1.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47927877","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

A Circuit-Level Implementation of Voltage-Tuning Scheme for Realizing Optical PAM-4 Using Three-Segment Microring Modulator 三段微环调制器实现光PAM-4电压调谐方案的电路级实现

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International Journal of Engineering and Technology Innovation Pub Date : 2020-04-01 DOI: 10.46604/ijeti.2020.5072

Rui Wang

引用次数: 0

A New Method for Fault Current Limiting and Voltage Compensating in Power Systems Using Active Superconducting Current Controller 用有源超导电流控制器实现电力系统故障限流和电压补偿的新方法

IF 1

International Journal of Engineering and Technology Innovation Pub Date : 2020-04-01 DOI: 10.46604/ijeti.2020.4700

A. Ghafari, M. Saniei, M. Razaz, A. Saffarian

{"title":"A New Method for Fault Current Limiting and Voltage Compensating in Power Systems Using Active Superconducting Current Controller","authors":"A. Ghafari, M. Saniei, M. Razaz, A. Saffarian","doi":"10.46604/ijeti.2020.4700","DOIUrl":"https://doi.org/10.46604/ijeti.2020.4700","url":null,"abstract":"Abstract In this paper, a new method for both fault current limiting and voltage compensating using Active Superconducting Current Controller (ASCC) is proposed. The main objective of this paper is to present an appropriate control strategy for ASCC to achieve both the fault current limiting and voltage compensation purposes. Three different operating modes are defined for ASCC including normal mode, fault current limiting mode, and voltage compensation mode and a proper control strategy is designed for each mode. For the fault current limiting, the model of a typical three-phase system with ASCC is simulated and different states for current limiting in different levels are defined. Also, for the voltage compensating mode, the PI model for the line is considered and the line transmission matrix is obtained when the ASCC is connected at the sending end and middle of the line. Finally, proper settings for ASCC are determined such that the magnitude of the receiving end and the sending end voltages become equal. Simulation results using MATLAB software confirm the proper performance of the proposed method.","PeriodicalId":43808,"journal":{"name":"International Journal of Engineering and Technology Innovation","volume":"10 1","pages":"130-145"},"PeriodicalIF":1.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48168478","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

Design Wind Speed Estimation for Long Span Bridges in Korean Southern and Western Coasts 韩国南部和西部沿海大跨度桥梁设计风速估算

IF 1

International Journal of Engineering and Technology Innovation Pub Date : 2020-04-01 DOI: 10.46604/ijeti.2020.3545

Dooyong Cho

{"title":"Design Wind Speed Estimation for Long Span Bridges in Korean Southern and Western Coasts","authors":"Dooyong Cho","doi":"10.46604/ijeti.2020.3545","DOIUrl":"https://doi.org/10.46604/ijeti.2020.3545","url":null,"abstract":"Recently, many long-span cable supported bridges, including the cable stayed bridges and the suspension bridges, have already been constructed or are planned for construction. Because the meteorological values used to estimate the wind load for designing the long-span bridges were based on data from the 1960s through 1995 in Korea, it is necessary to reconsider the proper design wind load for long-span bridges. In this paper, the research area is confined to the southern and western coasts of Korea where many long-span bridges have been built. The method of moment and the least-squares method are used to estimate the expected wind speeds of a 100-year return period for girder bridges; Gumbel’s distribution is used to estimate the expected wind speeds of a 200-year return period for long-span bridges. As the return period wind speed on the land surface is revised because of recent high-speed velocity, the revised return period wind speed is increased by 17%. The compatibility of return period wind speed is also evaluated using the RMS (root mean square) error method. This paper concludes that the least-squares method is more compatible than the method of moment for the case of the southern and western coasts of Korea.","PeriodicalId":43808,"journal":{"name":"International Journal of Engineering and Technology Innovation","volume":"10 1","pages":"146-155"},"PeriodicalIF":1.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41339703","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

Dynamic Modeling of a Spatial Cable-Driven Continuum Robot Using Euler-Lagrange Method 空间索驱动连续体机器人的欧拉-拉格朗日动力学建模

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International Journal of Engineering and Technology Innovation Pub Date : 2020-01-01 DOI: 10.46604/ijeti.2020.4422

A. Amouri, Chawki Mahfoudi, A. Zaatri

{"title":"Dynamic Modeling of a Spatial Cable-Driven Continuum Robot Using Euler-Lagrange Method","authors":"A. Amouri, Chawki Mahfoudi, A. Zaatri","doi":"10.46604/ijeti.2020.4422","DOIUrl":"https://doi.org/10.46604/ijeti.2020.4422","url":null,"abstract":"Continuum robots are kinematically redundant and their dynamic models are highly nonlinear. This study aims to overcome this difficulty by presenting a more practical dynamic model of a certain class of continuum robots called cable-driven continuum robot (CDCR). Firstly, the structural design of a CDCR with two rotational degrees of freedom (DOF) is introduced. Then, the kinematic models are derived according to the constant curvature assumption. Considering the complexity of the kinetic energy expression, it has been approximated by the well-known Taylor expansions. This case corresponds to weak bending angles within the specified bending angle range of the robot. On the other hand, due to the low weight of the CDCR components, the gravitational energy effects can be neglected compared to those stemmed from the elastic energy. Thereafter, the corresponding dynamic model is established using Euler-Lagrange method. Static and dynamic models have been illustrated by examples. This analysis and dynamic model development have been compared with the existing scientific literature. The obtained results shown that the consistency and the efficiency of accuracy for real-time have been carried out. However, the dynamic modeling of CDCR with more than 2-DOF leads to a more complex mathematical expression, and cannot be simplified by adopting the similar assumptions and methodology used in the case of 2-DOF.","PeriodicalId":43808,"journal":{"name":"International Journal of Engineering and Technology Innovation","volume":"10 1","pages":"60-74"},"PeriodicalIF":1.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70564902","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: 15

Experimental Characterization of A Piezoelectric Transducer Array Taking into Account Crosstalk Phenomenon 考虑串扰现象的压电换能器阵列的实验表征

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International Journal of Engineering and Technology Innovation Pub Date : 2020-01-01 DOI: 10.46604/ijeti.2020.4348

A. Bybi, Driss Khouili, C. Granger, M. Garoum, A. Mzerd, A. Hladky-Hennion

引用次数: 7

Connectivity Investigation of Channel Quality-Based Adaptive Gossip Flooding Mechanism for AODV 基于信道质量的AODV自适应八卦泛洪机制连通性研究

IF 1

International Journal of Engineering and Technology Innovation Pub Date : 2020-01-01 DOI: 10.46604/ijeti.2020.3812

P. Shete, R. Awale

{"title":"Connectivity Investigation of Channel Quality-Based Adaptive Gossip Flooding Mechanism for AODV","authors":"P. Shete, R. Awale","doi":"10.46604/ijeti.2020.3812","DOIUrl":"https://doi.org/10.46604/ijeti.2020.3812","url":null,"abstract":"To address the “broadcast storm” problem associated with flooding-based route discovery mechanism of reactive routing protocols, probabilistic approaches are suggested in the literature. In the earlier work, Gossip flooding mechanism of Haas et.al. was extended with signal quality, to propose channel quality based adaptive gossip flooding mechanism for AODV (CQAG-AODV). Following the cross-layer design principle, CQAG-AODV algorithm tried to discover robust routes, as well as address the “broadcast storm” problem by controlling the rebroadcast probability of Route request (RREQ) packets on the basis of signal strength experienced at the physical layer. This paper investigates the connectivity of CQAG-AODV through theoretical and simulation analysis. Results show that, by accounting the signal strength in the route discovery process, not only does the proposed algorithm floods a lesser number of route requests and controls the broadcast storm, but also maintains a higher level of connectivity to offer high packet delivery ratio; independent of network density and node mobility. Moreover, due to controlled routing overhead and robust route discovery, channel quality based adaptive flooding mechanism offers fringe benefit of energy efficiency as well. CQAG-AODV thus proves its suitability in a variety of use cases of multi-hop ad hoc networks including WSNs and VANETs.","PeriodicalId":43808,"journal":{"name":"International Journal of Engineering and Technology Innovation","volume":"10 1","pages":"25-40"},"PeriodicalIF":1.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70564347","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

On the Position Determination of Docking Station for AUVs Using Optical Sensor and Neural Network 基于光学传感器和神经网络的水下机器人对接位置确定研究

IF 1

International Journal of Engineering and Technology Innovation Pub Date : 2020-01-01 DOI: 10.46604/ijeti.2020.4158

T. Nhat, Hyeung-Sik Choi, J. Sur, Jin-Il Kang, Hyun-joong Son

{"title":"On the Position Determination of Docking Station for AUVs Using Optical Sensor and Neural Network","authors":"T. Nhat, Hyeung-Sik Choi, J. Sur, Jin-Il Kang, Hyun-joong Son","doi":"10.46604/ijeti.2020.4158","DOIUrl":"https://doi.org/10.46604/ijeti.2020.4158","url":null,"abstract":"Detecting the relative position of the docking station is a very important issue for the homing of AUVs (Autonomous Unmanned Vehicles). To detect the position of the light source, a pinhole camera model structure was proposed like the camera model. However, due to the sensor resolution and the distortion errors of the pinhole camera system, the application of the camera of docking the under turbid sea environments is almost impossible. In this paper, a new method detecting the position of the docking station using a light source is presented. Also, a newly developed optical sensor which makes it much easier to sense the light source than the camera system for homing of the AUV under the water is performed. In addition, to improve the system, a neural network (NN) algorithm constructing a model relating the light inputs and optical sensor which are developed in this study is proposed. To evaluate the performance of the NN algorithm, the experiments were performed in the air beforehand. The result shows that the NN algorithm with AUV docking system using the NN model is better than the pinhole camera model.","PeriodicalId":43808,"journal":{"name":"International Journal of Engineering and Technology Innovation","volume":"10 1","pages":"15-24"},"PeriodicalIF":1.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70564412","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: 4

Shear Behavior of RC Deep Beam Strengthened by V-Shaped External Rods v形外棒加固钢筋混凝土深梁的抗剪性能

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International Journal of Engineering and Technology Innovation Pub Date : 2020-01-01 DOI: 10.46604/ijeti.2020.4174

P. Rai, K. Phuvoravan

引用次数: 3

Application of Recent Developments in Deep Learning to ANN-based Automatic Berthing Systems 深度学习在基于人工神经网络的自动靠泊系统中的应用

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International Journal of Engineering and Technology Innovation Pub Date : 2020-01-01 DOI: 10.46604/ijeti.2020.4354

Daesoo Lee, Seungjae Lee, Youngho Seo

引用次数: 17