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《十堰职业技术学院学报》2020,(2):65-67
针对教学需要,研制了一种基于PLC和触摸屏控制的气动机械手,可用于液压与气动、PLC编程控制与调试课程实训。文章详细介绍了其机械结构、气动系统和控制系统。教学实践证明,该气动机械手对学生实习实训教学起到了很好的促进作用。 相似文献
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张建国 《Journal of Zhangzhou Technical Institute》2001,(1):49-50
机械手控制系统是一个气动非线系统,难于建立精确的数学模型,针对这一点,采用一种新颖的参数自整定Fuzzy-PID控制策略,并应用8751单片机的软硬件实现.实践证明了这种控制方案的可行性. 相似文献
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张建国 《漳州职业大学学报》2001,(1):49-50
机械手控制系统是一个气动非线系统，难于建立精确的数学模型，针对这一点，采用一种新颖的参数自整定Fuzzy-PID控制策略，并应用8751单片机的软硬件实现，实践证明了这种控制方案的可行性。 相似文献
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《河南职业技术师范学院学报(职业教育版)》2015,(3)
通过人手运动学和解剖学分析,建立了仿人机械手运动学模型,分析了机械手的力学性能,设计出一个最大抓取力为341.43 N的仿人五指机器手;仿人机器手采用了气动驱动方式,利用曲柄连杆机构实现了机械手各关节的弯曲功能,选用数据手套为控制系统的信号输入装置;基于三位建模软件Solidworks建立了仿人机器手各部件的三维模型以及整对仿人机器手进行了无干涉装配,为机器手的动力学分析提供了支撑. 相似文献
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针对目前基于PLC的机械手控制系统对电机控制的实时性不佳等问题,设计了两自由度并联机械手控制系统,并采用运动控制CPU作为控制器．通过建立数学模型对机械手进行分析,并编制了精简的控制程序,实现了机械手的高速、精确、平稳运行． 相似文献
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本文将介绍一种由机械手技术,可编程控制(PLC)技术和气动技术组成的铅笔刀组装线控制系统。其中,机械手指、电动改锥、螺钉盘、机械手与PLC控制器间的通讯及双方软件协调方面的设计都具有一定的特点。对设计方案及其工作原理都做了详尽的阐述,关键之处配以框图说明。 相似文献
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本文将介绍一种由机械手技术,可编程控制（ＰＬＣ）技术和气动技术组成的铅笔刀组装线控制系统。其中,机械手指、电动改锥、螺钉盘、机械手与ＰＬＣ控制器间的通讯及双方软件协调方面的设计都具有一定的特点。对设计方案及其工作原理都做了详尽的阐述,关键之处配以框图说明。 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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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 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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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 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