scholarly journals Modeling and Simulation of Automatic Berthing based on Bow and Stern Thruster Assist for Unmanned Surface Vehicle

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Gongxing Wu ◽  
Xiaolong Zhao ◽  
Linling Wang
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Modeling And Simulation ◽  
Practical Significance ◽  
Motion Simulation ◽  
Unmanned Surface Vehicle ◽  
Research Results ◽  
Mmg Model ◽  
Simulation Calculation ◽  
Effective Use

The purpose of this study is to meet the maneuverability requirements of the Unmanned Surface Vehicle (USV) in different conditions by the effective use of the bow and stern thruster, thus completing the automatic berthing task. Based on the MMG model, the maneuverability mathematical model of the USV with bow and stern thruster was established. And the motion simulation of USV maneuvering was carried out through the numerical simulation calculation. Then the berthing plan was designed basedon the maneuverability analysis of the USV low-speed motion, and the simulation of automatic berthing for USV was carried out. The research results of this paper can be of certain practical significance for the USV based on the support of the bow and stern thruster in the berthing. At the same time, it also provides a certain theoretical reference for the handling of the USV automatic berthing.

scholarly journals Insulated Cable Temperature Calculation and Numerical Simulation

2018 ◽  
Vol 175 ◽  
pp. 03014
Author(s):  
Xin-jian Li ◽  
Jun Yang ◽  
Bing-qiang Yan ◽  
Xiao Zheng
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Spontaneous Combustion ◽  
Practical Significance ◽  
Constant Current ◽  
Sectional Area ◽  
Analysis Method ◽  
Insulation Layer ◽  
Insulating Layer ◽  
Temperature Calculation

A mathematical model of electrified insulated cable was established to calculate temperature of insulating layer. The insulating layer temperature is determined as a function of the current intensity, time, insulation layer thickness, etc. A widely used polyvinyl chloride (PVC) cable with sectional area of 4 mm2 was selected as example and its insulating layer temperature was simulated using ANSYS. The simulation revealed the evolution of insulating layer temperature with time, and also along radius after a certain time when the cable was applied with 40A and 60A constant current respectively. The analysis method has practical significance to prevent electrical fire and can be applied to analyze spontaneous combustion accident of insulated cable.

Modeling and Simulation of Standard II Missiles Intercepting a Low Target

2013 ◽  
Vol 846-847 ◽  
pp. 1505-1508 ◽  
Author(s):  
Jie Chen ◽  
Shi Gai Li ◽  
Jun Wei Lei
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Computer Program ◽  
Modeling And Simulation ◽  
Missile Defense ◽  
Numerical Simulation Result ◽  
Guidance Law ◽  
Control Equation ◽  
The Mathematical Model

Based on linear simplification method, the mathematical model of standard II missile and target is built. The command control equation and guidance law are introduced to compute the trajectory of standard II missile and targets. The interception of low flying target with standard II missile is modeled and simulated with computer program. It studied different situations that the velocity and height of target varies. The numerical simulation result is proposed and analyzed, which is meaningful for the research of anti-missile defense.

Modeling and Simulation of Thermostatic Mixing Valve

2013 ◽  
Vol 365-366 ◽  
pp. 370-374
Author(s):  
Hai Chu Chen ◽  
Fang Yi Wu ◽  
Ping Zhang ◽  
Gen Liang Xiong ◽  
Yin Fa Zhu
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Flow Field ◽  
Modeling And Simulation ◽  
Adaptive Controller ◽  
Theoretical Research ◽  
New Type ◽  
Fluent Software ◽  
Simulation Results ◽  
The Mathematical Model

It researched a new type of intelligent thermostatic mixing valve which could keep the temperature and flux of the valve outlet water constant through the adaptive controller. It firstly established the mathematical model about angle - flux and angle - temperature of the valve. And then it based on thekεturbulence model and applied Fluent software to numerical simulation of the valve about the flow field. Finally, it compared the simulation results with the calculated value. The results show that they are basically consistent, prove the correctness of the theoretical research, and can be used to improve designing of the thermostatic valve.

The Modeling and Simulation Calculation of Anti-Submarine Patrol Magnetic Finder Inspection and Search

2015 ◽  
Vol 713-715 ◽  
pp. 2110-2114
Author(s):  
Yao Qing Zhang ◽  
Ming Tai Sun
Keyword(s):  
Mathematical Model ◽  
Modeling And Simulation ◽  
Search Area ◽  
Simulation Calculation ◽  
Range Change ◽  
Magnetic Detection ◽  
Set Up ◽  
Motor Model

According to the characteristics of inspection and search submarines, combining anti-submarine patrol aircraft method of searching with magnetic finder, this paper first established submarine motor model, and on this basis, respectively, set up a single and double machine mathematical model using magnetic finder inspection and search. Through simulation calculation, the influence of the range change of search area and magnetic detection finder on search probability was analyzed, and the effective suggestions for magnetic finder optimization are put forward.

Modelling and Simulation of NO2 Dispersion Phenomenon in Atmosphere by Analytical-Experimental Methods

2008 ◽  
Vol 59 (10) ◽  
Author(s):  
Delia Perju ◽  
Harieta Pirlea ◽  
Gabriela-Alina Brusturean ◽  
Dana Silaghi-Perju ◽  
Sorin Marinescu
Keyword(s):  
Mathematical Model ◽  
Nitrogen Dioxide ◽  
Modeling And Simulation ◽  
Human Health ◽  
Experimental Methods ◽  
Negative Effects ◽  
Real Situation ◽  
Experimental Values ◽  
The Mathematical Model

The European laws and recently the Romanian ones impose more and more strict norms to the large nitrogen dioxide polluters. They are obligated to continuously improve the installations and products so that they limit and reduce the nitrogen dioxide pollution, because it has negative effects on the human health and environment. In this paper are presented these researches made within a case study for the Timi�oara municipality, regarding the modeling and simulation of the nitrogen dioxide dispersion phenomenon coming from various sources in atmosphere with the help of analytical-experimental methods. The mathematical model resulting from these researches is accurately enough to describe the real situation. This was confirmed by comparing the results obtained based on the model with real experimental values.

Numerical Simulation on Mold Electromagnetic Eccentric Stirring and Central Segregation of Round Bloom

2013 ◽  
Vol 652-654 ◽  
pp. 2450-2454
Author(s):  
Zhi Hong Zhang ◽  
Guo Guang Cheng
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Electromagnetic Stirring ◽  
Center Line ◽  
Central Segregation

The paper describes multi-section round bloom casting using external MEMS, equipped with max section D600mm and min D280mm mold, the center line of D280mm mold not coincident with the axis of stirrer coils. it is exist eccentric electromagnetic stirring of mold which section less than max D600mm, a mathematical model of MEMS has been established, the index of central segregation of D280mm macrostructure had decreased less than 1.12 by optimized parameters of electromagnetic stirring and SEN immerse depth, in the end, the quality of round bloom had improved.

scholarly journals Mathematical model of the effective use of reclaimed lands in the South of Russia

2021 ◽  
Vol 1889 (3) ◽  
pp. 032033
Author(s):  
A K Apazhev ◽  
Y A Shekikhachev ◽  
L M Hazhmetov ◽  
L Z Shekikhacheva
Keyword(s):  
Mathematical Model ◽  
The South ◽  
Effective Use

Engineering Graphics Model Room Based on VRML

2013 ◽  
Vol 546 ◽  
pp. 93-95
Author(s):  
Fang Xie ◽  
You Jun Wang ◽  
Qiu Juan Lv ◽  
Hai Xia Du ◽  
Yan Jiao Li
Keyword(s):  
Three Dimensional ◽  
Space Time ◽  
Practical Significance ◽  
Functional Requirements ◽  
Remote Education ◽  
Engineering Graphics ◽  
Network Engineering ◽  
Effective Use ◽  
Model Room

The traditional engineering graphics model room could not be effective use by space, time and other factors of limitation. In view of the above questions, network engineering graphics model room was built with VRML software as a platform. This technology made use of PRO/E, Dreamweaver, Java software in order to transmission stability, the three dimensional visualization and strong interactivity and functional requirements. It has the important practical significance in remote education and teaching.

Modeling and Simulation of Ship Motion for Dynamic Positioning Vessel

2014 ◽  
Vol 919-921 ◽  
pp. 2127-2130
Author(s):  
Pei Wen Yu ◽  
Hui Chen
Keyword(s):  
Modeling And Simulation ◽  
Wind Wave ◽  
Ship Motion ◽  
Dynamic Positioning ◽  
Positioning System ◽  
Dynamic Positioning System ◽  
Oil Supply ◽  
Mmg Model ◽  
Simulation Results

The paper presents a method to build MMG model of ship motion for a oil supply vessel (OSV) with dynamic positioning system. It is assumed that the ship motion exposed to environment disturbances like wind, wave & currents, The simulation results show that the model of the vessel and environment disturbances are suitable, and the method is practicable .

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