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基于PLC的群控电梯教学仿真设备监控系统 总被引：1，自引：0，他引：1
应用先进的PLC技术和现场总线技术,建立群控电梯的N∶N网络通信,采用智能软件包Kingview来完成群控电梯监控系统设计,设计出主监控界面和报警记录窗口,完成对群控电梯的实时控制、监控和调度,实现群控电梯的智能控制. 相似文献
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基于N∶N网络的电梯实训装置群控系统 总被引：2，自引：0，他引：2
胡健 《实验室研究与探索》2009,28(12):237-239
提出了基于N:N网络的电梯群控系统设计方案,对3～8部电梯组成的梯群实施统一管理与监控.为了验证设计的可行性,在实验室内搭建了3部模型电梯,经试验测试,在数字量和开关量2种模式下都可以满足群梯控制的要求,并实现了群梯系统的计算机监控. 相似文献
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电梯为当今社会高层建筑人流和物流的输送提供了便利条件,智能电梯群控系统已经广泛应用到人们生活的方方面面,近些年,全国各地陆续发生电梯伤亡事故,针对这些问题。提出了一种基于MCGS监控的智能群控电梯系统设计,利用三菱的可编程逻辑控制器和变频调速技术,来达到系统运行可靠性高,抗干扰性强;利用北京昆仑通态自动化软件科技有限公司的MCGS监控智能电梯群的运行,实现了多电梯高效运行,对电梯的平稳性和安全性进行改善。 相似文献
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郭志冬 《江西电力职业技术学院学报》2018,(2)
在现代高层建筑物实际运行的过程中,电梯属于重要的垂直交通工具,直接决定人们的生活质量。而传统的技术方式已经无法满足当前发展需求,需在电梯处理中合理使用变频调速PLC控制系统设计方式,以此形成良好的系统设计与管理机制,协调各方面的参数内容与技术模式,加大整体结构的建设力度,充分发挥变频调速技术的积极作用,在提升电梯运行安全性与可靠性的情况下,为其后续发展奠定坚实的基础。 相似文献
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以两台六层电梯模型为例,介绍了一种实现电梯群控的方法,验证了PLC与上位机通信实现电梯群控的可行性和先进性。 相似文献
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多梯群控系统的设计与实现 总被引：2，自引：0，他引：2
本文介绍了由三部10层电梯模型构成电梯群控系统实物模型，阐述了如何实现系统总体结构、系统功能、软件结构设计思想及群控系统的客流仿真和电梯运行仿真设计。 相似文献
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以两台六层电梯模型为例，介绍了一种实现电梯群控的方法，验证了PLC与上位机通信实现电梯群控的可行性和先进性。 相似文献
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随着锚泊辅助动力定位和冰区动力定位的发展,多模式工作状态在动力定位的设计中显得越来越重要。动力定位系统需要根据不同的海况进行工作状态的切换,切换控制则能实现多模式的顺畅切换。切换控制在动力定位控制系统设计中的运用的研究主要集中在相关理论模型和模型实验两方面。切换控制以及动力定位均具有较为复杂的理论模型,国内外在理论模型以及仿真方面均开展了相关研究,国外部分机构结合仿真结果,开展了模型试验研究。总结相关研究的差异和共同点能够为以后的研究提供指导和建议,促进国内相关研究的进展。 相似文献
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李健 《通化师范学院学报》2022,(10):1-5
针对目前普遍使用的模糊电梯群控算法不具备学习功能、有些规则无法确定等问题,提出了一种基于冒泡排序的电梯群控算法,并对比运用两种不同算法对电梯控制器进行编程后的仿真实验结果 .结果证明：相比模糊群控算法,冒泡排序群控算法可显著减少用户候梯时间及电梯群运行总距离,提高电梯的使用效率. 相似文献
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针对电梯运行故障的动态诊断难题,提出一种优化的BF神经网络故障诊断模型,实时分析电梯运行数据,准确快速得出电梯故障信息,提高电梯运行的安全性和可靠性。将粒子群算法引入到神经网络算法中,修改误差目标函数的距离公式,建立电梯故障诊断的改进神经网络模型,并通过实验数据的仿真分析,从而验证了电梯故障诊断具有可行性。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献