共查询到19条相似文献,搜索用时 125 毫秒
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信道自身的复杂性和现场级试验的高投入、高风险限制了水声通信技术的发展。针对高效率水声通信技术研究的需求,提出1种水声通信半物理仿真平台水声通信半物理仿真平台(A Hardware-in-Loop Simulation Platform for Underwater Acoustic Communication)。水声通信半物理仿真平台以可配置水声Modem为核心,包括现场测试采集系统、算法仿真评估系统、算法实现装载系统、水声波形存储播放系统。基于建立的水声通信半物理仿真平台,进行水声直接序列扩频通信系统的半物理仿真研究,结果表明水声通信半物理仿真平台可有效提高水声通信技术的研究效率。 相似文献
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将GIS技术和虚拟现实技术运用到城市交通仿真系统的微观仿真研究中,在城域景观VRGIS一体化仿真平台基础上建立了城市道路交通微观仿真系统,通过标准化数据模型完成GIS输入交通仿真数据,利用VR技术实现交通仿真的三维可视化,以一种人机交互模式实现虚拟城市环境中的交通微观仿真。该系统用于英国纽卡斯尔市中心重建项目的方案评价中,通过对3种规划方案的优劣对比,为交通管理部门提供一定的决策支持。 相似文献
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我国沿海地区海洋旅游快速发展,被开发进行海洋旅游活动的海岸带及周边的海岛和海域都面临着海洋生态环境问题。为了更为深入地探究旅游给海洋生态环境带来的影响,在梳理了现有的海洋旅游环境的相关文献后,以复杂适应系统理论为基础,利用多Agent系统建模方法构建了一种有旅游者参与的海洋环境系统。该模型力求保留海洋环境系统的一般特性,再现海洋生态环境在受到旅游行为影响后发生的变迁。再利用StarLogo仿真平台对此模型进行仿真,通过调整各类参数模仿不同的旅游行为,对仿真结果进行了分析,还对进一步的研究提出了建议。 相似文献
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The Next Generation Subsea Production System (NextGen SPS) is a new concept for petroleum development in ultra-deep water (UDW) areas. It can improve the structural performance of riser as well as provide several operational benefits to subsurface well completion (SWC) equipment. The design of NextGen SPS’s riser system which includes rigid riser and flexible jumper—like the free standing hybrid riser (FSHR), is a very important issue for the definition of NextGen SPS. This paper details an optimization design on the NextGen SPS’s riser system, with the assistance of the design of experiments (DOE) and surrogate model techniques. The optimization model pertaining to riser system is formulated firstly. The DOE is a statistical technique that guides a sensitive study on the behavior of the riser system before the optimization analysis. Structural responses are obtained by the fully coupled methodology. Through such a preliminary study, the effective contribution of each design variable at the riser performance will be known and some general conclusive remarks will be obtained. Based on the DOE results, design variables are screened to improve the efficiency of optimization process. Particle swarm optimization (PSO) method is employed to conduct the optimization analysis. In this analysis, surrogate models, which are developed by back propagation neural network (BPNN), replace the time consuming dynamic analysis to predict structural responses. Latin hypercube sampling (LHS) method is adopted to generate training sample and testing sample for the BPNN. NextGen SPS that operates at a depth of 3000 m is used as the case for this investigation. The efficiency of optimization design is improved by DOE and surrogate techniques, and a reduction of approximately 46% for the riser system cost is achieved. The obtained conclusions have applicability in reference to the engineering design of FSHR and the study procedure will provide reference for study on other new structure concept. 相似文献
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为缓解淡水资源短缺及化石能源过度使用问题,提出多点液压式波浪能海水淡化系统,该系统主要由采能装置、液压传递系统与反渗透膜海水淡化设备组成。系统的采能装置采用振荡浮子式,可将波浪能转换为浮子振荡从而被液压系统吸收达到采集波浪能的目的。为了提高液压式波浪能海水淡化系统的采能效率及淡水率,利用AMEsim软件对液压传递系统进行建模与仿真,分析了蓄能器、浮子个数及波高对液压传递系统输出响应的影响。结果表明:蓄能器能够使液压马达的输出响应更加稳定;当浮子的数量增加时,液压系统达到稳定的运行状态所需的时间更短,从而有利于提高系统的效率;波高在2 m左右时,本系统的产水量达到最大。 相似文献
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A wave power device includes an energy harvesting system and a power take-off system. The power take-off system of a floating wave energy device is the key that converts wave energy into other forms. A set of hydraulic power take-off system, which suits for the floating wave energy devices, includes hydraulic system and power generation system. The hydraulic control system uses a special“self-hydraulic control system”to control hydraulic system to release or save energy under the maximum and the minimum pressures. The maximum pressure is enhanced to 23 MPa, the minimum to 9 MPa. Quite a few experiments show that the recent hydraulic system is evidently improved in efficiency and reliability than our previous one, that is expected to be great significant in the research and development of our prototype about wave energy conversion. 相似文献
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针对冰箱企业中存在多个抽样室的情况 ,本文提出了 1种基于网络的多服务器抽样测试系统的设计方案 ,并给出了实现方法。该系统为企业类似测试系统的应用提供了 1种方案 相似文献
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Design of a hydraulic power take-off system for the wave energy device with an inverse pendulum 总被引:1,自引:0,他引:1
This paper describes a dual-stroke acting hydraulic power take-off (PTO) system employed in the wave energy converter (WEC) with an inverse pendulum. The hydraulic PTO converts slow irregular reciprocating wave motions to relatively smooth, fast rotation of an electrical generator. The design of the hydraulic PTO system and its control are critical to maximize the generated power. A time domain simulation study and the laboratory experiment of the full-scale beach test are presented. The results of the simulation and laboratory experiments including their comparison at full-scale are also presented, which have validated the rationality of the design and the reliability of some key components of the prototype of the WEC with an inverse pendulum with the dual-stroke acting hydraulic PTO system. 相似文献
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鉴于国内外海洋地震台网的缺乏, 本文介绍了一种面向全球海域应用的漂浮式海底地震接收系统(mobile earthquake recording in marine areas by independent divers, MERMAID)。针对潜浮式地震仪MERMAID浮标的研发过程, 建立了浮标的总体设计要求与典型工作循环流程, 设计了液压式浮力调节系统、机械结构等, 并对比分析了不同转速及负浮力下潜过程, 最后进行了实验室压力检测和千岛湖湖试。试验结果表明, 该浮标能在15MPa压力下保持良好的密封性与稳定性, 利用水听器可以有效地采集到天然地震纵波(P波), 同时计算各模块单个周期的能耗, 以验证设计指标。 相似文献
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Modelling and control of oscillating-body wave energy converters with hydraulic power take-off and gas accumulator 总被引:1,自引:0,他引:1
Antnio F. de O. Falco 《Ocean Engineering》2007,34(14-15):2021-2032
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An increasing number of experiments are being conducted to study the design and performance of wave energy converters. Often in these tests, a real-time realization of prospective control algorithms is applied in order to assess and optimize energy absorption as well as other factors. This paper details the design and execution of an experiment for evaluating the capability of a model-scale WEC to execute basic control algorithms. Model-scale hardware, system, and experimental design are considered, with a focus on providing an experimental setup capable of meeting the dynamic requirements of a control system. To more efficiently execute such tests, a dry bench testing method is proposed and utilized to allow for controller tuning and to give an initial assessment of controller performance; this is followed by wave tank testing. The trends from the dry bench test and wave tank test results show good agreement with theory and confirm the ability of a relatively simple feedback controller to substantially improve energy absorption. Additionally, the dry bench testing approach is shown to be an effective and efficient means of designing and testing both controllers and actuator systems for wave energy converters. 相似文献