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本文介绍了“904”船上主遥控系统的参数选择过程。实践证明,即使主机未经陆上联调试验就装船,没有取得遥控主机所需的实测参数,也可从熟悉有关设备资料和计算机仿真研究中选定主机遥控所需的各类参数。这一成功经验可供今后的设计者参考。 相似文献
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舰船主机遥控系统位于舰船机舱内,操作人员可以通过主机遥控实现对船舶主机的远程控制,包括启停机、功率转换等功能,对提高船舶的机动性,减轻操作人员的工作量,提高船舶的自动化水平有重要的作用。为了提高操作人员对舰船主机遥控系统的熟练程度,同时降低训练成本,本文提出一种基于组态软件PIMS技术的舰船主机遥控虚拟操作系统,通过研究和分析主机遥控系统的控制逻辑,本文建立了主机遥控系统的完整模型,开发出了PIMS主机遥控虚拟操作系统,并对该系统进行了详细的介绍。 相似文献
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基于神经网络的柴油机遥控系统故障智能诊断研究 总被引:1,自引:0,他引:1
为了克服传统模拟电路故障诊断方法的不足,通过对船舶柴油机遥控系统工作原理的分析,提出采用BP神经网络诊断船舶主机遥控系统的智能诊断方法。介绍BP神经网络结构确定方法及其数值优化技术,并以具体电路模块为例探讨神经网络在船舶柴油机遥控系统故障诊断中的应用。通过Matlab仿真可以发现基于BP神经网络的电路故障诊断方法具有自适应性好、训练时间短、准确性高等特点。 相似文献
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船舶主机遥控系统的故障分析,是轮机工程中故障分析的难点之一,尤其在微机遥控系统中,由于微机本身比较复杂,安全装置比较多,故一旦发生故障,查找分析比较困难。本文以主机遥控系统的共性为基础,以常见故障为例,对主机遥控系统的故障作一初步探讨。 相似文献
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船舶主机遥控系统的故障分析,是轮机工程中故障分析的难点之一,尤其在微机遥控系统中,由于微机本身比较复杂,安全装置比较多,故一旦发生故障,查找分析比较困难,本文以主机遥控系统的共性为基础,以常见故障为例,对主机遥控系统的故障作一初步探讨。 相似文献
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介绍了我国港口资源的整合现状,指出港口整合可以提升港口的形象和地位,也为区域经济和城市的发展注入强大的动力。最后指出在港口资源整合中要避免的几个问题。 相似文献
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广州集装箱码头的轮胎式场桥小车制动器使用10多年后,出现了许多问题,故进行了改造.分析了轮胎式集装箱龙门起重机小车制动器的主要故障现象,提出了改造方案,并加以实施. 相似文献
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本文对现有的选定球面轴承的三种工程方法进行了分析比较.引入了“合力系数”,并给出了合力方向上投影面积的精确解. 相似文献
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分析柴油机故障中常见的机体裂纹故障原因,认为由于设计缺陷和管理及操作不当,易造成船舶柴油机缸体上的裂纹多发生在气缸套凸肩处。如不及时处理这些裂纹和故障,就会造成缸套的裂纹直至出现缸套漏水等严重后果,针对NANTAIQUEEN轮柴油机对该类型故障的检修提出具体措施。 相似文献
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The hydrophysical and hydrochemical structure of the Sea of Azov, with developed bottom anoxia, was studied during the RV “Akvanavt” cruise from July 31 to August 03, 2001. The anoxic zone with a thickness from 0.5 to 4 m above the bottom was found in all deep regions of the Sea. Concentrations of hydrochemical parameters were similar to the pronounced anoxic conditions (about 90 mmol m− 3 of hydrogen sulfide, 17 mmol m− 3 of ammonia, 6 mmol m− 3 of phosphate, 7 mmol m− 3 of total manganese). The hydrophysical structure was characterized by the uniform distribution of temperature in the upper 6–7 m mixed layer (UML). Below this a thin (0.4–0.8 m) thermocline layer was observed, just above the anoxic waters. Formation of this phenomenon was connected with that summer weather conditions. Intensive rains led to increased influx of river waters in June. That resulted in large input of allochtonous organic matter (OM) and inorganic nutrients; the latter were consumed on the additional autochthonous organic matter production. In July the weather was characterized by a significant rise in the daily averaged air temperature and large oscillations of temperature during the day. In this period a wind of constant direction was absent, but wind bursts were observed. The completed analyses showed that the formation of such a structure could be connected with the following factors: (i) positive growth trends of the daily averaged temperature and the daily oscillations of temperature, (ii) presence of wind bursts. The joint action of these factors resulted in the formation of the UML. The amplitude of wind bursts determined the depth of UML, and the value of trend determined the value of the temperature change in the thermocline. An initial presence of bottom halocline (caused by the Black Sea water influx to the bottom of the Sea of Azov) prevented the heating of the bottom layer and therefore led to an increase of vertical gradient of temperature in the thermocline. The spatial distribution of the turbulent exchange coefficient confirmed the existence of a “stagnation” area located above the anoxia zone, which is also, apparently, the reason for its occurrence. 相似文献