船舶电力推进系统的分布式仿真研究

设计一种分布式船舶电力推进系统结构,并在仿真的环境下研究了电力推进系统的工作性能和可靠性。分布式电力推进系统设有2组PLC控制中心,通过变频控制和逻辑控制的方式推进船舶的行进和螺旋桨的工作;给出船舶电力推进系统的仿真电路结构,并以载波层叠SPWM的控制方式实现对电力系统电压、电流等信号的控制,保证船舶电力系统以更经济的方式运转和工作。仿真实验数据表明,提出的分布式船舶电力推进系统在电磁信号输出的稳定性方面优势明显,可以使船舶电力系统动力性能和运行成本达到一种均衡的状态。     

PLC在船舶主机控制系统开发中的应用

中国是船舶制造大国,实现船舶主机控制系统的国产化以及品牌化对于保证我国船舶制造业的竞争力至关重要。本文提出一种基于PLC的船舶主机控制系统实现方案,对船舶主机的结构及工作原理进行了分析,使用PID的控制方法对船舶主机进行控制,设计了系统的整体结构,并对重点硬件设备进行选型,可以同时完成512个模拟量的采集,因而完全满足现代船舶主机控制要求。最后对PLC的软件流程进行了设计。系统具有良好的稳定性及可靠性。     

小型船舶电力推进控制系统的研发

船舶的动态特性具有强耦合、非线性、大时滞和大惯性等特点,并且风、流和浪等外部随机干扰也随着不同海况发生很大的变化,推进控制很难用精确的数学模型进行描述.根据船舶螺旋桨的推进特性,在阐述小型船舶电力推进系统的组成及运行特点的基础上,分析了推进电机控制的要求.采用矢量型变频器,设计了以菲尼克斯PLC为核心的控制系统,分析了系统的硬件配置和软件编程.实验结果表明,设计的控制系统能够满足控制功能要求,改善控制性能,提高系统控制可靠性.     

基于西门子S7-400H型PLC的船舶中央冷却系统控制装置

随着船舶海水系统防腐防漏设计要求的提高,中央冷却系统已广泛采用。鉴于需要冷却的设备多、布置分散、使用工况复杂,因此中央冷却系统实现自动化就尤为重要。以某型综合电力推进船舶为例,介绍了基于西门子S7-400H型PLC的船舶中央冷却系统自动控制装置的组成和工作原理,提出了以可靠、安全、节能和精度为控制目标,可有效减轻船员劳动强度。     

应用于船舶电站的同步发电机电压调节系统设计

随着船舶电气化程度的提高,各种通信导航设备都离不开电力的供给,为满足每个设备的额定电压要求,要求电网能够根据需要提供不同的电压。而船舶电站作为整个电力网络的核心,其内部同步发电机需要根据电网的负荷变化自动实现电压的调节,这对每个设备的稳定工作至关重要。本文介绍同步发电机的调压原理,建立励磁调压模型,并在此基础上利用先进的PID控制算法实现智能电压调整,极大地提高了电站系统的稳定性。     

基于PLC技术的船用电气自动化设备控制研究

电气自动化设备控制关系着船舶运行效率、安全以及稳定性。为此,进行基于PLC技术的船用电气自动化设备控制研究。该方法先是对PLC技术进行简要分析和介绍,后对PLC技术实现船用电气自动化设备控制过程进行研究,包括PLC控制程序设计与开发、PLC控制电气自动化设备运行过程分析。最后进行可靠性测试,结果表明:所提方法应用下,船用电气自动化设备控制可靠性达到设计要求,有利于提高船舶电气自动化设备运行精确度和效率,保证船舶设备安全和稳定运行。     

海洋工程船舶推进电动机要求分析

采用综合电力推进系统已成为船舶推进发展的趋势,推进电动机为综合电力推进系统重要设备之一,其性能的好坏直接影响整个船舶的性能。本文通过对海洋工程船舶推进电动机的基本要求和规范要求进行分析,为推进电动机的设计、制造提供参考。     

船舶辅助锅炉监控系统设计

论述了应用组态王软件开发技术和PLC硬件接口技术完成了船舶辅锅炉计算机监控系统．采用PLC控制器的特点,设计了适用于PLC控制的船舶锅炉控制工作时序、I/O分配和控制程序框图．模拟试验表明设计的软件程序能满足系统的工作要求,并能实现较好的动画效果．     

基于PLC和触摸屏的船舶电力推进监控装置设计

为提高船舶电力推进的控制质量与安全可靠性,设计了基于施耐德M340 PLC和XBTGT7340触摸屏的电力推进系统监控装置.装置的硬件方面,以Modbus现场总线技术为基础,运用ATV61变频器实施推进电机控制,运用PM850和ION7650两种电力参数检测仪表实施推进系统监视.装置的软件方面,在完成现场总线通讯、推进系统故障报警编程的基础上,鉴于船舶航行海况等因素对于推进系统安全运行的巨大影响,设计了转速/转矩联合的控制方式和两种控制方式进行无扰动切换的逻辑功能.装置制作完成后进行的推进电机控制实验表明,其功能可以满足船舶电力推进监控的主要要求.     

电力驱动系统电气工程与自动化控制的PLC应用

随着电力驱动技术的不断成熟,电力驱动船舶成为业界的研究热点,相对于传统的柴油驱动船舶,电力驱动船舶不仅更加环保,而且在调速和控制上更加灵活。本文的研究对象是船舶电力驱动系统的谐波抑制和变频控制等内容,结合电气工程和自动化控制技术,并利用PLC可编程逻辑控制器对电力驱动系统的关键环节进行设计,重点介绍了基于PLC的谐波抑制原理和变频原理。本研究对于改善船舶电力驱动系统的稳定性,提高驱动效率具有一定的价值。     

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

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第34届海洋、离岸及极地工程国际会议(英文)

正St.John's,Newfoundland,Canada,May 31-June 5,2015 OMAE2015 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;     

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.