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1.
本文结合机械手的PLC控制,设计一个基于组态控制的机械手试验系统.该系统用组态软件MCGS为开发平台,利用动画配合实物协同运动,给出直观的机械手运动展示和动态模拟.实验系统能脱机进行机械手仿真模拟控制,以其形象直观的特点降低了学习难度,提高了实验效率.  相似文献   

2.
本文对机械手的功能及各部位进行了介绍,分析机械手的组成及运动方式,介绍机械手手爪及臂部及腰部和支架的设计计算,以期为机械手的生产厂家进行设计及用户的使用提供参考.  相似文献   

3.
机械手首先是从美国开始研制的.工业机械手是近几十年发展起来的一种高科技自动化生产设备.工业机械手是工业机器人的一个重要分支.它的特点是可通过编程来完成各种预期的作业任务,在构造和性能上兼有人和机器各自的优点,尤其体现了人的智能和适应性.机械手作业的准确性和各种环境中完成作业的能力,在国民经济各领域有着广阔的发展前景.  相似文献   

4.
以数字化柔性制造生产线中的桁架机械手为控制对象,基于S7-200PLC和组态王软件设计了机械手监控系统.采用MAP库函数控制桁架机械手x轴、z轴的伺服运动,从而实现物料加工搬运的精确定位.运行结果表明,桁架机械手运行准确可靠,可以实现参数设置及系统运行状态的实时、动态监控,达到了设计要求.  相似文献   

5.
对一种新型绳索驱动式机械手进行了稳定抓取位形研究.该机械手具有欠驱动特点,采用绳轮传动系统和平行四连杆机构实现抓取功能.介绍了欠驱动机械手构型设计和抓取运动策略,建立了圆形物体包络抓取模型,推导出绳驱动力与指节抓取力的关系方程并分析了稳定抓取成立的条件.采用插值和迭代计算的方法,分析了绳轮式欠驱动机械手抓取圆形目标体时的稳定抓取位形. ADAMS准静力学仿真分析验证了指节抓取力分布的正确性,也验证了所提分析方法的可行性和有效性.欠驱动机械手指节接触力分布与被抓取物体位置关系表明绳驱动式欠驱动机械手具有3种稳定抓取位形.  相似文献   

6.
目的:针对机械手系统的高度耦合、非线性等动力学特性,系统结构和参数在实际工作中存在诸多不可预知因素,研究机械手的轨迹跟踪问题.方法:利用神经网络来构建机械手的逆系统模型,将其与被控对象串联构成伪线性系统,从而将非线性问题转化为线性问题,实现了机械手的在线建模、解耦控制.结果:仿真实验结果表明,迅速的跟踪给定的期望轨迹,脉冲干扰并未系统带来明显影响.结论:方案对控制系统有较强的适应性、稳定性以及抗干扰性能,有效地解决了机械手的轨迹跟踪问题.  相似文献   

7.
本文从原理、实现方法、程序应用等几方面介绍了六自由度机械手.六自由度机械手作为一种机电一体平台,该机器手可以实现在空间任一点(小于机械手的回转半径范围)实现对一定重量的物体抓举的功能.其具有很强的扩展性,可以根据需要适时修改程序以实现各种需要的功能.  相似文献   

8.
机械手在科技高速发展的时代占有举足轻重的地位,是现代生产、生活中不可或缺的一个重要组成部分.机械手可通过编程来完成各种预期的作业任务,在构造和性能上兼有人和机器各自的优点,尤其体现了人的智能性和适应性.执行机构是机械手的重要组成部分之一,了解它的构成和原理对设计工作者尤为重要.  相似文献   

9.
在现在生产过程中,许多生产环境和工艺都要求机械手应具有无线控制和准确定位的能力以满足生产.为此我们研究和开发了基于单片机为核心的下位机底层控制系统和用VB开发的上位机(PC机)软件,两者之间的数据传送是利用以NRF9E5为核心的传输模块来实现.同时设计了直流电机定位系统以解决机械手的定位问题,提高了机械手的可靠性、智能性和控制精度.  相似文献   

10.
医院自动取药机器人样机是一种新型的自助取药模式.自助取药机械手作为执行部件,具有根据信息识别药物位置及种类,根据信号提取一定数量的药物的功能,系统利用滑台运输药物到控制台是安全传输的关键.应用蓝牙无线传输技术进行远程控制,并通过舵机控制整个机械手的工作速度,验证了机械手设计的合理性,完成自动取药机器人样机的制作.最后,通过实验证明了该方法精度高、稳定性好,目前将该方法成功运用于自动取药机械手设计中.  相似文献   

11.
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   

12.
风的曲线     
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   

13.
Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F.  相似文献   

14.
汉字倒说     
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。  相似文献   

15.
《海外英语》2007,(5):44-45
It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,  相似文献   

16.
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language.  相似文献   

17.
钱生钱!     
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了  相似文献   

18.
《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   

19.
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex.  相似文献   

20.
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