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为提高船体水下清洗设备的自动化程度,使清洗设备能在人控制下自动地前进、后退、左转、右转、清刷头的自动提升和下降,文章设计了采用单片机控制液压马达驱动爬行机构运动及红外对射自动调整叶片高度的叶片清洗装置,使清洗设备既洗掉附在船壳上的海生物,又不刮伤船壳表面的油漆。并对整个电路的调试,采用软件进行模拟仿真运行,来提高设计准确率,并在实验中得到验证。 相似文献
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《舰船科学技术》2017,(23)
无人水下航行器(UUV)是一种无人驾驶,通过遥控或自动控制在水下航行的航行体,具有自主性、低风险性、隐蔽性、可部署性和环境适应性的特点,具有重要的军事价值。UUV以潜艇或水面舰为支援平台能够长时间在水下自主远程航行,并且可作为多种传感器的搭载平台,可应用于探扫雷、海洋监视侦察、潜艇探测、水下障碍物搜索定位以及通信导航等多个领域。随着以水下电场传感器、磁场传感器为代表的非声探测传感器技术和信息处理技术的发展,利用UUV平台搭载电磁传感器对水下目标进行探测、定位和识别已经受到国内外高度重视,具有广泛的应用前景。本文将首先对国内外典型UUV进行介绍,在此基础上阐述UUV水下电磁探测的基本原理,介绍UUV水下电磁探测的国内外发展趋势,最后对UUV水下电磁探测应用前景进行展望和分析。 相似文献
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In the underwater environment, many visual sensors don’t work, and many sensors which work well for robots working in space or on land can not be used underwater. Therefore, an optical fiber slide tactile sensor was designed based on the inner modulation mechanism of optical fibers. The principles and structure of the sensor are explained in detail. Its static and dynamic characteristics were analyzed theoretically and then simulated. A dynamic characteristic model was built and the simulation made using the GA based neural network. In order to improve sensor response, the recognition model of the sensor was designed based on the ‘inverse solution’ principle of neural networks, increasing the control precision and the sensitivity of the manipulator. 相似文献
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采用高压喷射气体燃料的低速二冲程LNG/柴油双燃料发动机对供气系统的供气能力及系统可靠性提出了较高要求,在高压供气系统的初始设计中对设计参数和设备选型等进行校核与评估尤为基础和必要。以针对某25000DWT LNG动力散货船设计的高压供气系统为例,采用油气系统工艺过程仿真软件Aspen HYSYS和换热器仿真单元软件Shell Tube Exchanger对系统在典型负荷下的工艺过程进行仿真,通过仿真值与设计值的对比,对高压供气系统的设计及设备选型进行分析。分析结果表明,高压供气系统的供气能力满足系统的设计要求,LNG高压气化/加热器的选型满足换热能力的要求且具有一定冗余。 相似文献
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SONG Zhi-ming KANG Feng-ju TANG Kai and CHU Yan-jun Marine College Northuxstern Polytechnical University Xi'''' an China 《船舶与海洋工程学报》2003,2(2):40-45
Realistic simulation of underwater scene is always difficult because of the special and complex vision effects in underwater space. Seabed is an important part of underwater environment. This paper describes the methods for seabed scene simulation based on OpenGL. It includes construction of fluetuant terrain based on the random sinusoidal algorithm, simulation of seabed flicker effect by means of circular texture mapping and generation of turbidity effect by using fog techniques. For the application based on the leading high level 3D development environment-Vega, underwater scene simulation is still a difficulty since there is no module for it. Based on the analysis of Vega software and the research on seabed scene simulation methods, a Vega extending module named “Underwater Space” was created through developing module class and extending lynx interface. The module class was designed through developing DLL written in C . The Lynx was extended through developing keyword configure file, GUI configure file and lynx plug-in DLL. The problem that Vega can‘t simulate underwater space, is elementarily resolved. The results show that this module is efficient, easy using, and the seabed scene images am vivid. 相似文献
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基于AUTODYN的水下爆炸冲击波模拟研究 总被引:5,自引:0,他引:5
为提高水下爆炸冲击波的模拟精度,基于AUTODYN程序,采用数值模拟和实验研究相结合的方法,研究了网格密度、状态方程等对数值模拟结果的影响.发现要同时获得较好精度的压力和冲量模拟结果需要设置较高的网格密度;而状态方程的不同也有影响,计算结果表明,相对于多项式状态方程,SHOCK状态方程模拟中远场冲击波时更为准确.基于上述研究结果,通过设置较高的网格密度并利用SHOCK状态方程模拟了实验室小水池水下爆炸的冲击波传播情况,发现无论是峰值压力还是压力衰减趋势的模拟结果都和实验相符,说明了AUTODYN模拟冲击波传播的精确性. 相似文献
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针对水下航行器用冷凝器的结构特性和使用环境,建立冷凝器中小通道内蒸汽冷凝换热过程的焓值模型,对流换热系数模型和压力模型。根据4种不同的换热系数计算式,求解对应关系式下的焓值、温度、压力和干度仿真值,并结合实验数据进行对比分析,得到在单相区采用 D-B关联式,在两相区采用 A-R关联式,计算的结果误差最小。并以此为基础,对小通道的截面尺寸进行计算分析,计算结果表明:当通道截面宽度为6 mm时,小通道具有较好的流动换热能力,为水下航行器的工程设计提供重要参考。 相似文献