基于Arduino开发环境的无人艇控制系统设计

针对无人艇实体硬件开发较少、设计开发周期长且控制系统造价昂贵这一现状,设计一种无人艇控制系统。系统以Arduino为集成开发环境,整体涵盖电机驱动系统、环境感知系统、运动状态监测系统和通信系统。系统以At Mega 2560单片机为主控单元,集成电机驱动模块、超声波传感器模块、GPS模块、惯性导航模块以及GPRS模块,并完成集成电路设计与集成开发板的制作。通过对主控单元进行编程,结合自动路径规划算法和自动避障算法,无人艇可以完成自主运动控制和对周围环境的智能感知,且无人艇船载设备端与网络控制端之间可以进行实时交互,具有无线网络通信功能。最终实现一种低成本、高效率的无人艇控制系统设计方案,具有实际工程应用价值。     

计算机在交通信号灯智能控制系统设计中的应用

交通控制不仅是一个实时的控制系统而且是一个具有随机性、非线性、不确定性的复杂系统,该篇讨论了运用PLC(可编程逻辑控制器)控制技术和模糊控制方法的交通信号控制系统并讨论了如何采用与计算机之间的通讯链接技术完成交通对象的复杂控制和运用模糊控制原理,将人的控制经验及推理过程纳入系统自动控制当中,使车辆行驶和道路导航实现智能化.     

基于Labview和PLC的船舶压载水控制系统

针对国际海事组织关于压载水只有经过处理达到相关标准才能排放的规定,本文介绍一种满足国际海事组织的《国际船舶压载水和沉积物管理与控制公约》G8准则要求的船舶压载水处理装置管理系统的组成及原理。设计一套船舶压载水处理装置控制系统,将Labview和PLC的数据通信技术应用到船舶压载水处理控制系统当中。开展船舶压载水系统控制理论的分析,建立Labview和PLC之间的数据通信关系,给出基于Lavview和PLC的船舶压载水控制系统的设计方法,详细介绍控制系统的设计思路、组成和实现方法,并对其与现有压载水处理系统的嵌入性应用进行分析。压载水处理效果经岸基试验结果表明,系统具有良好的软件交互界面,编程简单,控制效果良好,处理效果达到相关标准,具有实际应用价值。     

基于自抗扰控制技术的船舶航向自动舵控制方法研究

本文基于线性Nomoto船舶运动模型,以传统PID控制器为基础,考虑到船舶自身状态和外界未知干扰对船舶航向系统的影响,对船舶航向自动舵控制系统引入自抗扰技术,建立以自抗扰控制方法为基础的船舶航向控制系统。最后利用Simulink仿真软件搭建系统的仿真模块,对改进的船舶航向控制系统的性能进行仿真验证。结果表明该方法具有较强鲁棒性、抗干扰性,解决了超调性与快速性之间的矛盾。在应对海上复杂的环境时有良好的动态性能和稳态性能。     

基于MATLAB平台的燃料电池系统建模及外特性仿真

本文建立了燃料电池系统的数学模型,采用MATLAB/SIMULINK平台建立了燃料电池系统及动力系统的仿真模型;通过仿真计算,研究了燃料电池系统与动力系统之间的关系。结果表明,仿真模型具有良好的匹配性及适用性,该研究方法可以应用于燃料电池及动力系统的特性仿真、优化设计和控制系统的研究。     

PLC在舰船辅助机械自动控制系统中的应用

可编程逻辑控制器是一种集成化程度非常高的专用控制系统,它将软件程序与硬件结构相结合,在分布式系统的控制上具有成本低、可控性强、集成化等优点,目前在工业领域中获得了非常广泛的应用。舰船是一个复杂的集成系统,除了动力系统、电力系统等主要系统外,舰船上还有大量的辅助机械控制系统,比如导航系统、偏航系统、电站配电系统等,研究这些舰船辅助机械控制系统具有非常重要的意义。本文基于PLC控制技术,分别对舰船的智能导航系统、三相电机控制系统和配电故障检测系统进行升级和优化,具有重要的实际应用价值。     

巴基斯坦某浮式液化天然气(LNG)码头控制系统的解决方案

为系统研究巴基斯坦某浮式LNG码头工程的控制系统设计方法,针对浮式LNG码头特殊的系泊、靠泊和作业要求,绘出适合浮式LNG码头的控制系统框架;详细阐述船岸连接系统、消防控制系统、靠泊及辅助控制系统等各子系统之间的相互关系以及各控制子系统的具体配置;根据巴基斯坦某浮式LNG码头平面布置条件,通过研究各国规范相关规定、并结合现行国内控制系统设计标准,总结出一套区别于常规LNG码头控制系统的设计思路和解决方案。结果表明,浮式LNG码头在常规LNG码头搭建控制系统框架的基础上,在数据传输通道、线缆合理布局以及主控对象选择等方面,有进一步优化提升的空间。     

现代船舶电站监控系统的设计研究

综合现场总线控制系统(FCS)、集散控制系统(DCS)和PLC控制系统的各自优点,设计了具有双冗余网络的现代船舶电站监控系统,并对系统的架构、系统的监控功能以及上位控制管理软硬件的选取进行了说明。     

有机朗肯循环发电机组控制系统设计

本文介绍了有机朗肯循环发电机组控制系统的组成,详细介绍了人机接口、数据采集和处理系统、汽轮机控制系统和发电机综合控制与保护系统四个部分的功能和设计思路。该系统具有高度的智能化,可以实现现场设备的无人值守。     

基于分布式智能的船舶电力推进系统运行控制与管理策略研究

运行控制和管理策略是船舶电力推进控制系统设计的核心技术,是实现船舶电力推进控制系统自动化、网络化、信息化的基础.本文对基于分布式智能船舶电力推进系统的运行特征进行了分析,梳理推进系统设备以及与其它系统之间的控制逻辑,研究了满足任务需求的电力推进系统运行控制和管理策略及体系结构.为水面船舶电力推进监控系统标准化设计奠定了良好的基础.     

Errata

正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors.     

Journal of Marine Science and Application 2014 Sum. Contents

正~~     

33rd International Conference on Ocean,Offshore and Arctic Engineering （OMAE2014）

正San Francisco,California,June 8-13,2014.OMAE 2014 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to:·meet and present advances in technology and its scientific support;·to exchange ideas and experiences whilst promoting technological progress and its application in industry·to promote international cooperation in ocean,offshore and arctic engineering.In line with the tradition of excellence of previous OMAE conferences,more than 900 technical papers are planned for presentation.Outreach for Engineers Specialty Forum This Specialty Forum is designed for students and professionals who may not be familiar with the Ocean and Offshore industry,as well as those who have just recently specialized in this field.     

联合作战计划和执行系统

全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划：时间不限的精密预案计划生成作战计划、方案计划或职能计划；时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础，加速应付危机的能力。     

Recent progress on wave induced loading measurements in warships

Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form.     

The 11th International Conference on Hydrodynamics (ICHD 2014)

正19–24 October 2014 SingaporeCONFERENCE THEMES The overall aim of the ICHD Conference is to provide a forum for participants from around the world to review,discuss and present the latest developments in the broad discipline of hydrodynamics and fluid mechanics.The first International Conference on Hydrodynamics(ICHD)was initiated in 1994 in Wuxi,China.Since then,9 more ICHD conferences were held subsequently in Hong Kong,Seoul,Yokohama,Tainan,Perth,Ischia,Nantes,Shanghai and St Petersburg.Evidently the ICHD conference has become an important event among academics,researchers,engineers and operators,working in the fields closely related to the science and technology of hydrodynamics.The 11th ICHD will be held in Singapore in 2014.     

第十二届深水操作会议和展览会(英文)

正November 4-6,2014Moody Gardens HotelConvention Center/Galveston,TX The Deepwater Operations Conference and Exhibition is celebrating its 12th anniversary this year.This growing event will continue the tradition of excellence in addressing operational challenges involved in developing deepwater resources.We will return to the Moody Gardens Hotel and Convention Center on November 5-7,2014 in Galveston,Texas.     

Eastbound or westbound ?

In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama？
The answer is China South Port Group （Hong Kong, Shenzhen and Guangzhou）.     

Impact of regulation on the performances of long-distance transport services: A comparison of the different approaches in Sweden and Norway

Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues.     

某海港码头的撞损修复

依据码头撞击受损区域调查检测结果,对受损构件提出合理的修复方案,为码头的安全运行提供保障。