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通过对同一航次的两组海洋深水潜标系统进行对比分析,总结了要成功收放深水潜标,在设计上和投放中所应注意的问题,更好地指引今后的科考工作。 相似文献
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两组海洋深水潜标系统的对比分析 总被引:1,自引:0,他引:1
通过对同一航次的两组海洋深水潜标系统进行对比分析,总结了要成功收放深水潜标,在设计上和投放中所应注意的问题,更好地指引今后的科考工作. 相似文献
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对于中国造船而言,2011年极不平凡,深水铺管起重船“海洋石油201”建成试航、由熔盛重工为中国海洋石油总公司建造的“海洋石油201”船总长204.65米、型宽39.2米、型深14米,是国内自主设计建造的第一艘具有自航能力的深水铺管起重船,能在除北极外的全球无限航区作业。,深水铺管起重船“海洋石油201”的建成,将填补中国在深水装备领域的空白,与中国海油打造的其他深水开发配套装备一起,使中国跻身世界3000米深水开发俱乐部。 相似文献
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深水采油树生产回路作为水下油气开采的生产通道,将水下油井中的油气汇集到水下管线中,最后运送到海洋平台,其可用性会严重影响整套水下油气生产系统的工作效率,但目前很少有文献或报道对采油树生产回路的运维可靠性和可用性进行相关描述。针对深水采油树生产回路的运维可靠性评估问题,开展复杂环境下系统退化时变性的维修干预影响研究,提出基于随机Petri网的运维可靠性分析方法,解决深水采油树生产回路可靠性分析过程中多种失效模式同时发生的爆炸性问题;研究深水采油树生产回路的复杂失效模式,揭示不同故障对系统可靠性和可用性的影响规律;通过OREDA失效数据库验证所建立模型评估结果的准确性。结果表明:所提出的方法可以有效评估深水采油树生产系统运维可靠性和可用性,并验证当失效率为10-6、10-5和10-4时,系统平均维修时间分别为1.84、7.57、131.07 h,满足OREDA失效率维修数据。 相似文献
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微流控芯片发展与展望 总被引:17,自引:0,他引:17
介绍了微控分析系统的一般特点,发展历史和近期的研究进展,分别讨论了微流控分析系统中有关流控系统,芯片材料,检测系统,集成化系统,分离系统,试样引入和前处理系统等研究领域的发展趋势,并对微流控分析系统的应用前景做出了展望。 相似文献
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对机械设计及其发展的系统学研究 总被引:1,自引:1,他引:0
以系统学观点对设计系统进行了描述,提出了设计系统具有分层系统结构,由设计过程系统、设计工具系统及产品物质系统等,构成从产品物质系统到产品技术系统的非线性映照,并建立了系统模型,进而在该模型的基础上,对机械设计各分系统及其发展进行了探讨。 相似文献
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将两套二轴数控系统并联,通过对系统脉冲频率的调整,来控制两套系统每段程序的运行时间,使两套系统对应的程序段能同时起动、同步运行又同时结束,以此实现两套系统的4轴联动,完成螺旋喷头的加工。 相似文献
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周洁 《机械制造与自动化》2022,51(1):234-236,240
结合机械式停车设备的类型,介绍停放在带充电功能的机械式停车设备上的电动汽车的几种充电形式、取电器结构及机械式停车设备充电时取电功能的实现.依据不同机械式停车设备特点,推荐不同形式对电动汽车充电的方法.就带充电功能的机械式停车设备存在的潜在风险进行分析. 相似文献
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Fuzzy logic based systems are very widely used for modeling and control of complex non-linear, plants. Fuzzy systems require the knowledge about the structure of the dynamic plant in order to achieve fruitful results. Recurrent Fuzzy systems (RFS) are a variation of fuzzy systems and have the ability to model and control dynamic plants without using the information about the structure of the plant. This paper presents identification and control of non-linear dynamical systems using two different architectures of recurrent fuzzy system (RFS). It highlights the importance of RFS over the conventional type-1 fuzzy based system. The objective of system identification as well as control has been achieved using both the architectures of RFS and the simulation results clearly show their efficiency. This paper also highlights yet another advantage of RFS over the conventional type-1 fuzzy systems which comes into light when dealing with higher order systems. The paper explains how the computational complexity can be greatly reduced by using RFS for higher order dynamical systems. A comparative analysis between the conventional type-1 fuzzy system and the two recurrent fuzzy systems has also been performed. 相似文献
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本文提出了对无人驾驶城铁车电气系统的基本要求,针对无人驾驶车辆的特点,通过对牵引系统、辅助电源系统、列车控制及监控系统和旅客信息系统等列车电气系统的详细设计要求和参数,结合对整车技术参数的要求,对电气系统的技术方案进行了详细的研究工作. 相似文献
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This paper deals with the present status and future trends of expert systems in manufacturing, taking up some representative
systems in Japan as examples. The roles of expert systems in manufacturing are first discussed. The present status of research
and development of expert systems is summarised taking some typical systems developed and utilised in various manufacturing
fields, such as design, process planning, production control, and diagnosis. Finally, important problems to be solved in the
future are discussed aiming at utilising the expert systems more efficiently in the manufacturing field. 相似文献
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BT与HSK工具系统高速加工性能比较分析 总被引:1,自引:0,他引:1
通过对BT工具系统和HSK工具系统的结构特点和数字模拟分析比较,从理论上论证了HSK工具系统的高速加工性能优于BT工具系统,并通过实验比较了两者的静、动态性能. 相似文献
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Tone Lerher Matjaz Sraml Janez Kramberger Iztok Potrc Matej Borovinsek Blaz Zmazek 《The International Journal of Advanced Manufacturing Technology》2006,30(3-4):340-356
Multi aisle automated storage and retrieval systems correspond to multiple picking aisles served by a single storage and retrieval machine. These systems are used in practice when the need for pallet places is high and the throughput capacity is relatively low. Therefore, considerable savings of initial investment costs due to single aisle systems can be achieved using such systems. The objective of the presented study is to develop analytical travel time models for multi aisle automated storage and retrieval systems considering the operating characteristics of the storage and retrieval machine. With the proposed analytical travel time models, average travel time of the storage and retrieval machine, from which the performance of multi aisle automated storage and retrieval systems can be evaluated is determined. A simulation model of multi aisle automated storage and retrieval systems was developed to compare the performances of the proposed analytical travel time models. An example of multi aisle automated storage and retrieval systems with five picking aisles was presented for the evaluation purpose. The results show that proposed analytical travel time models perform satisfactory according to the results of simulation analysis and could be very useful tools for designing of multi aisle automated storage and retrieval systems in real-world applications. 相似文献
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网络控制系统的仿真平台设计 总被引:5,自引:0,他引:5
研究网络控制系统时,一项主要的研究内容是研究网络对控制系统性能的影响,基于此目的设计了网络控制系统仿真平台NCSS。该平台利用Matlab来构造实际对象模型,基于物理网络使用Windows套接字Winsock进行控制器与对象之间的通信。该平台可以方便地模拟实际对象的运行,并能够灵活地实现各种控制算法,为网络控制系统的分析与设计提供了较好的仿真环境。 相似文献