无人水下航行器控制系统CAN转换节点设计与测试

UUV模拟水下运动物体目标特性时,需增加部分重要特征量的模拟设备,以提高其模拟目标的准确性。文章采用CAN协议芯片SJA1000与单片机为主要硬件,利用C语言编制硬件驱动程序,设计并实现了RS485(232)-CAN转换节点,构建了节点测试平台,对设计实现的节点进行了测试验证,测试表明其满足UUV控制系统CAN要求,可对非CAN网络设备接入UUV控制系统CAN网络,增强UUV模拟水下运动物体特征的准确性提供有力支持。     

UUV走航CTD探测的航迹规划及控制方法研究

介绍了一种航迹规划与控制方法,使得无人水下航行器(UUV)能够使用CTD测量仪完成水下探测任务。详细介绍了所研究的UUV硬件系统体系结构,同时完成UUV水平面和垂直面的航迹规划,使其在满足UUV设计要求及CTD测量特性约束条件下能够完成水下探测任务。为了实现UUV在三维空间里较好的跟踪所规划的航迹,应用自抗扰控制(ADRC)技术,分别设计了自抗扰航向控制器和纵倾控制器。所研究的航迹规划与控制方法在UUV半实物试验中得以验证。     

无人水下航行器控制系统CAN总线通信设计与仿真研究

由于水下环境的复杂性及无人水下航行器自身特点,对其实施实时高效控制需处理大量数据。文章采用CAN总线对UUV控制系统通信网络进行设计和分析,讨论了CAN总线网络数据帧在系统中的具体应用设计和传输参数设置,并使用CANoe仿真软件对所设计的UUV控制系统CAN网络进行了仿真,通过仿真验证了UUV控制系统CAN网络通信设计的正确性。该方法应用于UUV控制系统通信网络设计,将有效提高UUV系统控制性能和特征模拟性能。     

基于跨域基站UUV集群试验方法研究

本文针对水下无人系统集群协同探测与目标跟踪,提出基于水面水下跨域基站通信组网UUV集群湖上试验方案和思路。通过研制水下集群控制系统,以及UUV平台尝试加装鱼雷自导并解决加装后平台信息控制、跟踪弹道设计、低速下自导参数确定、跟踪与攻击策略等技术,实现了湖上UUV集群探测与攻击协同试验。湖上通信拉距试验、组网试验、探测与攻击协同试验表明,该方案能够满足至少三节点的集群探测与攻击试验目的,试验实施简单有效,采用的架构和方法亦可用于更多节点的UUV集群试验。     

UUV的故障树仿真建模与分析

简要介绍故障树分析的传统方法,建立了以无人水下航行器(Unmanned Underwater Vehicle,UUV)不能正常工作为顶事件的故障树.采用蒙特卡罗随机抽样方法,建立UUV的故障树仿真模型,编制了MATLAB故障树仿真程序,对故障树进行定量分析.求出该系统的平均无故障工作时间,并得出了UUV系统的寿命分布曲...     

基于多学科设计优化的UUV总体组合优化方法

无人水下航行器(UUV)是多学科交叉的复杂耦合系统,采用多学科设计优化(MDO)可以大大缩短UUV研发周期,提升UUV总体性能。针对UUV的总体设计,开展模块化学科划分,建立各学科分析模型。由于UUV总体系统属于多变量高维空间,单一的优化方法并不能得到全局范围的最优解,采用序列二次规划法结合自适应模拟退火法以及序列二次规划法结合多岛遗传算法的组合优化设计方法,基于协同优化策略,开展以UUV总重量为主优化目标的多学科设计优化,并利用仿真分析对优化后的UUV结构强度与稳定性进行校验。由优化设计的结果可以看出,UUV满足各个子系统约束的前提下,有效地减小了UUV总重量。     

腹部作业型水下机器人控制系统研制

[目的]针对无人水下机器人(UUV)的回收任务要求,研制开发一台新式腹部作业型水下遥控机器人(ROV)。腹部作业型ROV不同于一般依赖机械手作业的传统ROV,其通过腹部作业机构完成与UUV的水下对接及回收。[方法]介绍腹部作业型ROV的系统组成及原理,提出一种以一体化工业加固计算机为水面监控单元,PC104嵌入式工业控制计算机为水下主控单元,各驱动板为驱动单元的控制系统架构。同时建立腹部作业型ROV的动力学模型,并设计水平面定向控制的H∞鲁棒控制器。[结果]单项试验、系统联调及水池试验表明,腹部作业型ROV控制系统具有良好的实时性和可靠性,能够满足UUV回收任务的要求。[结论]该架构和算法对于其他移动机器人、无人机、仿生机器人的控制系统开发均具有参考意义。     

一种水下航行体控制系统分布式半实物仿真平台的构建

针对水下航行体控制系统半实物仿真平台要完成的功能日趋复杂的问题,提出了一种基于dSPACE和xPC的分布式半实物仿真平台,介绍了该平台的系统构架和软硬件实现;介绍了将dSPACE仿真机和xPC实时仿真机集成在同一个实时系统中的方法和要解决的问题,分析了该仿真平台的实时性;给出了1个水下航行体控制系统半实物仿真的应用实例。该平台将dSPACE和xPC集成在同1个分布式实时系统下,分布式的系统结构不仅在功能的实现和扩展方面非常方便,同时也利于实时注入式仿真、快速控制原型的实施。通过半实物仿真试验,该平台已经成功服务于某水下航行体控制系统的研制,证明了本文所提出方案的可行性。     

基于遗传算法的UUV快速性和能源系统综合优化分析

水下无人航行器(UUV)的总体优化设计一般由快速性、操纵性、结构强度、能源系统等系统构成,各个系统之间耦合,综合考虑各系统间的耦合作用对于UUV的设计至关重要,本文针对UUV快速性和能源系统综合优化的问题进行研究,主要工作有:根据艇型特点选择了19个相关设计变量,构建了约束条件,综合考虑各性能指标,建立了UUV快速性和能源系统综合目标函数;利用VC++语言,编制了基于遗传算法的UUV快速性和能源系统综合优化程序,从UUV快速性和能源系统的角度选取7个较敏感的设计变量进行了敏感度分析。通过计算表明,该优化系统准确可靠,平行中体长度、回转体直径和3 kn航速航行时间对优化系统较为敏感。     

基于罗兰C的UUV浅海导航定位技术研究

罗兰C工作于长波波段,具有一定的海水穿透能力,为UUV的水下导航定位提供了途径。在设计并实现罗兰C全向磁天线的基础上,通过对罗兰C信号传播场分量的分析,认为水下采用磁天线接收水平磁场信号是UUV的最佳选择,在此基础上,结合场强预测的布雷默曲线和水中信号衰减规律,仿真计算了罗兰C信号在不同距离、深度上的磁场场强和水下磁天线所能感应的电压值。利用所设计的磁天线,开展了水下接收罗兰C磁信号的实验,结果表明在表层水域(深度小于5米时),UUV利用罗兰C进行定位导航是可行的。     

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.     

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~~     

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。