《以下是原始文字.doc》由会员分享，可在线阅读，更多相关《以下是原始文字.doc（3页珍藏版）》请在金锄头文库上搜索。
1、以下是原始文字：摘要本论文主要研究抓斗起重机运用先进的可编程控制技术、变频器和绝对值编码器，取代传统的电气控制方式，提高抓斗起重机的工作效率，减小抓斗起重机的故障率，降低维修费用，使维修工作量大大减少，操作变得简单，可以实现半自动化操作，减少人为的操作事故，运行可靠，具有节能效果。本论文着重研究抓斗起重机自动开闭斗的原理，提出游动坐标法的原理及物理意义，利用绝对值编码器自动跟踪检测抓斗起升、开闭钢丝绳的长度差值，实现自动开闭、沉抓的功能，具有实用价值。并根据抓斗起重机实际运用中经常出现的故障，开发出故障显示功能。本论文分成四个部分：第一部分（第一章）绪论部分主要对抓斗起重机工作原理作了介绍，着
2、重介绍了抓斗起重机传统控制方式存在的问题，进而探讨了实现抓斗起重机智能操作的研究可能性和研究意义。第二部分（第二、三、四章）分别对可编程控制器（PLC），变频器、绝对值编码器的组成、功能各原理作了介绍，以及PLC、变频器、编码器的选型作了理论上的分析，为下文抓斗起重机智能化控制的实现打下了理论基础。第三部分(第五章)研究抓斗起重机智能控制的具体实现方案，大车、小车，起升开闭机构PLC、变频器、绝对值编码器的电气连接、工作原理。特别详细阐述了抓斗实现自动开闭斗的原理，以及抓斗自动沉抓功能的实现。还介绍了用编码器取代上升极限位的实现原理。第四部分（第六章）主要介绍抓斗起重机智能控制的软件结构，PL
3、C组态、还详细写出大车、小车、起升开闭机构的软件程序。最后对整个研究作一总结，并且对今后的研究方向作了展望关键词：起重机、可编程控制器、变频器、绝对值编码器、自动开闭斗、故障显示以下是翻译的文字：AbstractThe present paper main research grab hoist crane utilizationadvanced programmable control technology, the frequency changer andthe absolute value encoder, the substitution tradition electricityc
4、ontrol mode, enhances the grab hoist crane the working efficiency,reduces grab hoist crane the failure rate, reduces the maintenancecost, causes the service work load greatly to reduce, the operationchanges simply, may realize the semiautomatic operation, reduces theartificial operation accident, th
5、e movement is reliable, has theenergy conservation effectThe present paper emphatically studies the principle which the grabhoist crane automatic make and break fights, proposed hovers thecoordinates method principle and the physics significance, the useabsolute value encoder automatic tracking exam
6、ination grab gets up lives, themake and break steel wire length difference value, the realizationautomatic make and break, sinks the function which grasps, has thepractical value. And in the basis grab hoist crane actual utilizationfrequently appears the breakdown, the development crashes thedemonst
7、ration function. The present paper divides into four parts:The first part (first chapter) the introduction were partial hasmainly made the introduction to the grab hoist crane principle ofwork, emphatically introduced the grab hoist crane tradition controlmode existence question, then has discussed
8、the realization grab hoistcrane intelligence operation research possibility and the researchsignificance.The second part (second, three, four chapters) separately to theprogrammable controller (PLC), the frequency changer, the absolutevalue encoder composition, the function various principles have m
9、adethe introduction, as well as PLC, the frequency changer, the encodershaping has made the theoretically analysis, has built the rationalefor the as follows grab hoist crane intellectualization controlrealization. The third part (fifth chapter) studies the grab hoist craneintelligence control the c
10、oncrete realization plan, the large cart,the car, gets up lives make and break organization PLC, frequency changer,absolute value encoder electrical connection, principle of work.Specially in detail elaborated the grab realization automatic make andbreak fights the principle, as well as the grab aut
11、omatically sinksstresses the function the realization. Also introduced substitutes forthe rise extremely spacing with the encoder the realization principle. The fourth part (sixth chapter) the main introduction grab hoist craneintelligence control software architecture, the PLC configuration,also in
12、 detail writes the large cart, the car, Gets up livesthe make andbreak organization software procedure. Finally makes a summary to the entire research, and has made theforecast to the next research directionKey word: The hoist crane, the programmable controller, the frequencychanger, the absolute value encoder, the automatic make and breakfight, the breakdown demonstration
