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Yuan Wei, Renliang Chen, Ye Yuan and Luofeng Wang
This study assesses the influence of engine dynamic characteristics on helicopter handling quality during hover and low-speed forward flight. First, we construct the helicopter?engine coupling model (HECM) based on the power-matching relationship between...
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Madinah Shamsu and Muhammad Akbar
Hurricane storm surges are influenced by wind intensity, forward speed, width and slope of the ocean bottom, central pressure, angle of approach, shape of coastal lines, local features, and storm size. A numerical experiment is conducted using the Advanc...
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Namkyun Im and Sangmin Lee
The effects of wave height and forward speed on the seakeeping performance of a small fishing vessel in irregular waves are evaluated using computational fluid dynamics (CFD). The wave height effect changed linearly for a forward speed in the head sea an...
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Hongjun Liu and Wenyi Zhang
According to the conditions of seeding operations in hilly areas of Northeast China, a bidirectional profiling press device (BPPD) was designed. The BPPD mainly consists of a press roller and strength adjusting mechanism which could grant the BPPD horizo...
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Abram Musinguzi and Muhammad K. Akbar
Hurricane storm surges are influenced by several factors, including wind intensity, surface pressure, forward speed, size, angle of approach, ocean bottom depth and slope, shape and geographical features of the coastline. The relative influence of each f...
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Abram Musinguzi, Madinah Shamsu, Muhammad K. Akbar and Jason G. Fleming
In this study, it is demonstrated that hurricane wind intensity, forward speed, pressure, and track play an important role on the generation and propagation of coastal storm surges. Hurricane Irma, which heavily impacted the entire Florida peninsula in 2...
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Linfeng Chen, Yitao Wang, Xueliang Wang and Xueshen Cao
A series of CFD RANS simulations are presented for Wigley hulls of two freeboard heights progressing with forward speed in waves. Free surface effects are captured using the Volume of Fluid (VOF) method embedded in open source software OpenFOAM. Comparis...
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Tianlong Mei, Maxim Candries, Evert Lataire and Zaojian Zou
In this paper, an improved potential flow model is proposed for the hydrodynamic analysis of ships advancing in waves. A desingularized Rankine panel method, which has been improved with the added effect of nonlinear steady wave-making (NSWM) flow in fre...
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Finite control set-model predictive torque control (FCS-MPTC) depends on the system parameters and the weight coefficients setting. At the same time, since the actual load disturbance is unavoidable, the model parameters are not matched, and there is a t...
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Chun Wang, Yongchao Shao, You Zhang, Zhi Xin, Jian Chen, Weiguo Zhang and Fuzeng Yang
In this study, a comb-type buckwheat-harvesting device was designed and tested for use in hilly areas and on small plots of buckwheat in China. The device uses semi-feeding and allows for threshing before cutting. Through the parametric design of the thr...
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Sewon Kim, Sangwoong Yun and Youngjun You
The upcoming autonomous vessel voyage is promising future in the maritime sector. However, so far, the contemporary route decision making technologies rely on human intervention. Therefore, this manuscript proposes the two newly developed speed algorithm...
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Baogang Li, Dongye Sun, Minghui Hu and Junlong Liu
An automatic control strategy for forward speed in the planting process is proposed to improve the fuel economy and reduce the labor intensity of drivers. Models of tractors with power-shift transmission (PST) and a precise pneumatic planter with an elec...
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Hongjun Liu, Wei Yan, Yao Ji and Wenyi Zhang
During the working process of a conventional press roller in the rice?wheat rotation area, the phenomenon of soil adhesion and a large slip rate, which are directly related to the growth and the output of the wheat, occurred widely. It was found that the...
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Bohai Deng and Jinfa Xu
The compound unmanned aircraft is provided with three primary flight modes, which are helicopter flight mode in low forward speed flight, airplane flight mode in high forward speed flight and transition flight mode in middle forward speed flight. For the...
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Hossam S. Abdelwahab, Shan Wang, Josko Parunov and C. Guedes Soares
A new uncertainty quantifier is presented for linear transfer functions of wave-induced ship motions and loads obtained by various seakeeping codes. The numerical simulations are conducted for the high-speed Flokstra container ship in regular waves at va...
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Peng Zhang, Teng Zhang and Xin Wang
A new three-dimensional (3D) time-domain panel method is developed to solve the ship hydrodynamic problem and motions. For an advancing ship with a constant forward speed in regular waves, the ship?s hull can be discretized and processed into a number of...
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Chang-Min Lee, Tae-Youl Jeon, Byung-Gun Jung and Young-Chan Lee
Since fuel prices account for approximately 40% of a ship?s operating costs, shipping companies worldwide have made significant efforts to save energy on board such as introducing new technologies or machine operation methods. Many ship operators have ad...
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Zhiyuan Zhang, Jingbin Li, Xianfei Wang, Yongman Zhao, Shuaikang Xue and Zipeng Su
The aim of this paper is to optimize the working parameters of the arc-shaped nail-tooth roller-type recovery machine for sowing layer residual film. Firstly, the tooth roller device of the residual film recovery machine is designed, and the main working...
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Bin Li, Xiaolong Gao, Xuegeng Chen, Yang Liu, Shiguo Wang and Yuncheng Dong
To solve the problems associated with the poor harvesting ability of existing sunflower harvester cutting tables, and high seed drop rates, we designed a sunflower cutting table that can greatly improve the operational performance of sunflower combine ha...
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Ke Lu, Hongyuan Tian, Pan Zhen, Senkui Lu and Renliang Chen
The tiltrotor aircraft consists of three primary flight modes, which are helicopter flight mode in low forward speed flight, airplane flight mode in high forward speed flight and conversion flight mode. This paper presents an active disturbance rejection...
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