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机械毕业设计英文外文翻译204机电一体化

机械毕业设计英文外文翻译204机电一体化
机械毕业设计英文外文翻译204机电一体化

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INTEGRATION OF MACHINERY

(From ELECTRICAL AND MACHINERY INDUSTRY)ABSTRACT

Machinery was the modern science and technology development inevitable result, this article has summarized the integration of machinery technology basic outline and the development background .Summarized the domestic and foreign integration of machinery technology present situation, has analyzed the integration of machinery technology trend of development.

Key word:integration of machinery ,technology,present situation ,product t,echnique of manufacture ,trend of development

0. Introduction modern science and technology unceasing development, impelled different discipline intersecting enormously with the seepage, has caused the project domain technological revolution and the transformation .In mechanical engineering domain, because the microelectronic technology and the computer technology rapid development and forms to the mechanical industry seepage the integration of machinery, caused the mechanical industry the technical structure, the product organization, the function and the constitution, the production method and the management system has had the huge change, caused the industrial production to enter into “the integration of machinery” by “the machinery electrification” for the characteristic development phase.

1. Integration of machinery outline integration of machinery is refers in the organization new owner function, the power function, in the information processing function and the control function introduces the electronic technology, unifies the system the mechanism and the computerization design and the software which constitutes always to call. The integration of machinery development also has become one to have until now own system new discipline, not only develops along with the science and technology, but also entrusts with the new content .But its basic characteristic may summarize is: The integration of machinery is embarks from the system viewpoint, synthesis community technologies and so on utilization mechanical technology, microelectronic technology, automatic control technology,

computer technology, information technology, sensing observation and control technology, electric power electronic technology, connection technology, information conversion technology as well as software programming technology, according to the system function goal and the optimized organization goal, reasonable disposition and the layout various functions unit, in multi-purpose, high grade, redundant reliable, in the low energy consumption significance realize the specific function value, and causes the overall system optimization the systems engineering technology .From this produces functional system, then becomes an integration of machinery systematic or the integration of machinery product. Therefore, “integration of machinery” covering “technology” and “product” two aspects .Only is, the integration of machinery technology is based on the above community technology organic fusion one kind of comprehensive technology, but is not mechanical technical, the microelectronic technology as well as other new technical simple combination, pieces together .This is the integration of machinery and the machinery adds the machinery electrification which the electricity forms in the concept basic difference .The mechanical engineering technology has the merely technical to develop the machinery electrification, still was the traditional machinery, its main function still was replaces with the enlargement physical strength .But after develops the integration of machinery, micro electron installment besides may substitute for certain mechanical parts the original function, but also can entrust with many new functions, like the automatic detection, the automatic reduction information, demonstrate the record, the automatic control and the control automatic diagnosis and the protection automatically and so on .Not only namely the integration of machinery product is human's hand and body extending, human's sense organ and the brains look, has the intellectualized characteristic is the integration of machinery and the machinery electrification distinguishes in the function essence.

2. Integration of machinery development condition integration of machinery development may divide into 3 stages roughly.20th century 60's before for the first stage, this stage is called the initial stage .In this time, the people determination not on own initiative uses the electronic technology the preliminary achievement to consummate the mechanical product the performance .Specially in Second World War period, the war has stimulated the mechanical product and the electronic technology union, these mechanical and electrical union military technology, postwar transfers civilly, to postwar economical restoration positive function .Developed and the development at that time generally speaking also is at the spontaneous

condition .Because at that time the electronic technology development not yet achieved certain level, mechanical technical and electronic technology union also not impossible widespread and thorough development, already developed the product was also unable to promote massively. The 20th century 70~80 ages for the second stage, may be called the vigorous development stage .This time, the computer technology, the control technology, the communication development, has laid the technology base for the integration of machinery development . Large-scale, ultra large scale integrated circuit and microcomputer swift and violent development, has provided the full material base for the integration of machinery development .This time characteristic is :①A mechatronics word first generally is accepted in Japan, probably obtains the quite widespread acknowledgment to 1980s last stages in the worldwide scale ;②The integration of machinery technology and the product obtained the enormous development ;③The various countries start to the integration of machinery technology and the product give the very big attention and the support. 1990s later periods, started the integration of machinery technology the new stage which makes great strides forward to the intellectualized direction, the integration of machinery enters the thorough development time .At the same time, optics, the communication and so on entered the integration of machinery, processes the technology also zhan to appear tiny in the integration of machinery the foot, appeared the light integration of machinery and the micro integration of machinery and so on the new branch; On the other hand to the integration of machinery system modeling design, the analysis and the integrated method, the integration of machinery discipline system and the trend of development has all conducted the thorough research .At the same time, because the huge

progress which domains and so on artificial intelligence technology, neural network technology and optical fiber technology obtain, opened the development vast world for the integration of machinery technology .These research, will urge the integration of machinery further to establish the integrity the foundation and forms the integrity gradually the scientific system. Our country is only then starts from the beginning of 1980s in this aspect to study with the application .The State Council had been established the integration of machinery leading group and lists as “863 plans” this technology .When formulated “95” the pla n and in 2010 developed the summary had considered fully on international the influence which and possibly brought from this about the integration of machinery technology development trend .Many universities, colleges and institutes, the development facility and some large and

middle scale enterprises have done the massive work to this technical development and the application, does not yield certain result, but and so on the advanced countries compared with Japan still has the suitable disparity.

3. Integration of machinery trend of development integrations of machinery are the collection machinery, the electron, optics, the control, the computer, the information and so on the multi-disciplinary overlapping syntheses, its development and the progress rely on and promote the correlation technology development and the progress .Therefore, the integration of machinery main development direction is as follows:

3.1 Intellectualized intellectualizations are 21st century integration of machinery technological development important development directions .The artificial intelligence obtains day by day in the integration of machinery constructor's research takes, the robot and the numerical control engine bed intellectualization is the important application .Here sai d “the intellectualization” is to the machine behavior description, is in the control theory foundation, the absorption artificial intelligence, the operations research, the computer science, the fuzzy mathematics, the psychology, the physiology and the chaos dynamics and so on the new thought, the new method, simulate the human intelligence, enable it to have abilities and so on judgment inference, logical thinking, independent decision-making, obtains the higher control goal in order to .Indeed, enable the integration of machinery product to have with the human identical intelligence, is not impossible, also is nonessential .But, the high performance, the high speed microprocessor enable the integration of machinery product to have preliminary intelligent or human's partial intelligences, then is completely possible and essential.

In the modern manufacture process, the information has become the control manufacture industry the determining factor, moreover is the most active actuation factor .Enhances the manufacture system information-handling capacity to become the modern manufacture science development a key point .As a result of the manufacture system information organization and structure multi-level, makes the information the gain, the integration and the fusion presents draws up the character, information measure multi-dimensional, as well as information organization's multi-level .In the manufacture information structural model, manufacture information uniform restraint, dissemination processing and magnanimous data aspects and so on manufacture knowledge library management, all also wait for further break through.

Each kind of artificial intelligence tool and the computation intelligence method promoted the manufacture intelligence development in the manufacture widespread application .A kind based on the biological evolution algorithm computation intelligent agent, in includes the

scheduling problem in the combination optimization solution area of technology, receives the more and more universal attention, hopefully completes the combination optimization question when the manufacture the solution speed and the solution precision aspect breaks through the question scale in pairs the restriction .The manufacture intelligence also displays in: The intelligent dispatch, the intelligent design, the intelligent processing, the robot study, the intelligent control, the intelligent craft plan, the intelligent diagnosis and so on are various These question key breakthrough, may form the product innovation the basic research system. Between 2 modern mechanical engineering front science different science overlapping fusion will have the new science accumulation, the economical development and society's progress has had the new request and the expectation to the science and technology, thus will form the front science .The front science also has solved and between the solution scientific question border area .The front science has the obvious time domain, the domain and the dynamic characteristic .The project front science distinguished in the general basic science important characteristic is it has covered the key science and technology question which the project actual appeared.

Manufacture system is a complex large-scale system, for satisfies the manufacture system agility, the fast response and fast reorganization ability, must profit from the information science, the life sciences and the social sciences and so on the multi-disciplinary research results, the exploration manufacture system new architecture, the manufacture pattern and the manufacture system effective operational mechanism .Makes the system optimization the organizational structure and the good movement condition is makes the system modeling , the simulation and the optimized essential target .Not only the manufacture system new architecture to makes the enterprise the agility and may reorganize ability to the demand response ability to have the vital significance, moreover to made the enterprise first floor production equipment the flexibility and may dynamic reorganization ability set a higher request .The biological manufacture view more and more many is introduced the manufacture system, satisfies the manufacture system new request.

The study organizes and circulates method and technique of complicated system from the biological phenomenon, is a valid exit which will solve many hard nut to cracks that manufacturing industry face from now on currently .Imitating to living what manufacturing point is mimicry living creature organ of from the organization, from match more, from growth with from evolution etc. function structure and circulate mode of a kind of manufacturing system and manufacturing process.

The manufacturing drives in the mechanism under, continuously by one's own perfect raise on organizing structure and circulating mode and thus to adapt the process of[with] ability for the environment .For from descend but the last product proceed together a design and make a craft rules the auto of the distance born, produce system of dynamic state reorganization and product and manufacturing the system tend automatically excellent provided theories foundation and carry out a condition .Imitate to living a manufacturing to belong to manufacturing science and life science of\"the far good luck is miscellaneous to hand over\", it will produce to the manufacturing industry for 21 centuries huge of influence .The research contents which imitates to living a manufacturing has two aspects currently:

1: Facing to the imitating of life livings a manufacturing

Study general regulation and model of biological phenomenon, for example the organization structure of the information processing technique, living creature intelligence, living creature type of artificial life, cell auto machine, living creature and circulate the evolution of mode and living creature and tend excellent mechanism etc.

2: Face to make of imitating and livinging manufacturing The research imitates to living manufacturing system of from organize mechanism and method ,such as: Based on full information sharing biological modelling principle of design, based on multi-autonomy unit coordination distributional control and based on evolution mechanism optimization strategy; Research biological modelling manufacture concept system and foundation, for example: Biological modelling space formal description technique and information mapping relations, biological modelling system and evolutionary process order of complexity gauging device. The mechanical biological modelling and the biological modelling manufacture is mechanical discipline and so on science and life sciences, information science, materials science high fusions, its research content including growth forming craft, biological modelling design and manufacture system, intelligent biological modelling machinery and biological forming manufacture and so

on .At present does the research work mostly will be the front exploring work, has the bright basic research characteristic, if holds the opportunity to study, possibly will have the revolutionary breakthrough .From now on will be supposed to pay attention the research area will have the biology to process technical, the biological modelling manufacture system, based on the fast prototype technique of manufacture organization engineering, as well as with bio-engineering correlation key technologies foundation and so on. Since 3 modern technique of manufacture trend of development 1990s, the various countries all has carried on the technique of manufacture research and the development as the national key technologies gives priority to development, like US's advanced technique of manufacture plans AMTP, Japan's intelligence technique of manufacture (IMS) international cooperation plan, South Korea's high-level modern technology national plan (G--7), Germany's manufacture 2000 plans with European Economic Community's ESPRIT and BRITE-EURAM plan. Along with high technology and new technology and so on electron, information unceasing development, the market demand personalization and the diversification, future the modern technique of manufacture development general trend will be to the precision, the flexibility, the network, the virtualization, intellectualized, the green integration, the globalization direction develops. The current modern technique of manufacture trend of development has following nine aspects approximately: (1) Information technology, the management technology and the processing technology close union, the modern manufacture production pattern can obtain develops unceasingly. (2) Design technology and method more modernized. (3) Formation and the technique of manufacture precision, the manufacture process realize the low energy consumption. (4) New special processing method formation. (5) Develops new one generation ultra precise, the supervelocity manufacture equipment. (6) Processing craft develops by the technique for the engineering science. (7) Implements the non-pollution green manufacture. (8) In manufacturing industry widespread application virtual reality technology. (9) Makes humanist.

3.2 Modular modulations are one item important and the arduous project .Because the integration of machinery product type and the manufacturer are many, but the development and the development have standard mechanical connection, electrical connection, power connection, the environment connection integration of machinery product unit are an item extremely complex also are the extremely important matters .If the development collection deceleration, the

intelligent velocity modulation, the electrical machinery in a body power unit, have function and so on vision, imagery processing, recognition and range finder control units, as well as each kind can complete the model operation the mechanism .Thus, may use the standard unit to develop the new product rapidly, simultaneously also may expand the scale of production .This need formulates each standard, in order to various parts, unit match and connection .As a result of the conflicts of interest, very will be difficult to formulate international or the domestic this aspect standard in the near future, but might through set up some big enterprises to form gradually .Obviously, the advantage which from the electrical product standardization, the seriation brings may affirm, regardless of is to produces the standard integration of machinery unit the enterprise to produce the integration of machinery product the enterprise, the formalization will give the integration of machinery enterprise to bring the happy future.

3.3 Network 1990s, the computer technology and so on the prominent achievement is the networking .Networking starting with the rapid development for the science and technology, the industrial production, political, the military, the education magnanimous act person daily life has all brought the huge transformation .Each kind of network the global economy, the production links up into a single stretch, enterprise's competition will also globalize .Once the integration of machinery new product develops, so long as its function is original, the quality is reliable, very quick can the best-selling whole world .As a result of the network popularization, is on the rise based on network each kind of long-distance control and the surveillance technology, but long-distance control terminal device itself is the integration of machinery product .The field bus and the local area network technology was the domestic electric appliances network has become the situation, (home net) connected using the family network each kind of domestic electric appliances take the computer as the central computer integration electrical appliances system (computer integrated appliance system, CIAS), caused the people at home to share the inconvenience and the joy which each kind of high-tech brought .Therefore, the integration of machinery product faces the network direction to develop without doubt.

3.4 Microminiaturized microminiaturization emerge in the end of 1980s, refers is the integration of machinery to the miniature machine and the microscopic domain development tendency .Overseas name it micro electron mechanical system (MEMS), makes a general reference the geometry size not to surpass 1-3CM the

integration of machinery product, and to micron, nanometer level development .The micro integration of machinery product volume small, consumes energy few, the movement is flexible, in aspects and so on biological medical service, military, information has the incomparable superiority .The micro integration of machinery development bottleneck lies in the micro mechanical technology, the micro integration of machinery product processing uses the fine processing technology, namely ultra precise technology, it including photoetching technology and etching technology two kinds.

3.5 green industries lived developed for the people have brought the huge change .The material is at the same time rich, the life is comfortable; On the other hand, the resources reduce, the ecological environment receives the serious pollution .Therefore, the people appeal the protection environment resources, the return nature .The green product concept arises at the historic moment under this kind of call, the green is the time tendency .The green product in its design, the manufacture, the use and in the destruction life process, conforms to the specific environmental protection and the human health request, harmless or the harm are extremely few to the ecological environment, the resources use factor is extremely high .The design green integration of machinery product, has the broad development future .The integration of machinery product green mainly is refers, when use does not pollute the ecological environment, after the abandonment can recycle the use. One of

3.6 Systematized systematization performance characteristics is the system architecture further uses open style and the patternizing main line structure .The system may the nimble configuration, carry on tailors and the combination willfully, simultaneously seeks realizes the multi-subsystem coordination control and the synthesis management .Second performance is the correspondence function big enhancement, generally besides RS232, but also has RS485, the DCS personification .The future integration of machinery will even more pay great attention to the product and human's relations, the integration of machinery personification will have two meanings .One is, the integration of machinery product finally user is a human, how entrusts with the integration of machinery product person's intelligence, the emotion, the human nature appears more and more importantly, specially the opposite party uses the robot, its high-level boundary is the man-machine integration .Another imitates the biological mechanism, develops each kind of mechanical and electrical body colored product .In fact, many

integration of machinery products all are developed animal's inspiration.

4. Conclusions in summary, the integration of machinery appearance is not isolated, it is many science and technology development crystallization, is the social productive forces develops the certain stage inevitably request .Certainly, also has with the integration of machinery related technology very many, and along with the science and technology development, the tendency which each kind of technology will fuse mutually more and more is obvious, the integration of machinery technology broad prospects for development more and more will be also bright.

机电一体化

摘要

机电一体化是现代科学技术发展的必然结果,本文简述了机电一体化技术的基本概要和发展背景。综述了国内外机电一体化技术的现状,分析了机电一体化技术的发展趋势。

关键词

机电一体化技术现状产品制造技术发展趋势

1.绪论

现代科学技术的不断发展,极大地推动了不同学科的交叉与渗透,导致了工程领域的技术革命与改造。在机械工程领域,由于微电子技术和计算机技术的迅速发展及其向机械工业的渗透所形成的机电一体化,使机械工业的技术结构、产品机构、功能与构成、生产方式及管理体系发生了巨大变化,使工业生产由“机械电气化”迈入了“机电一体化”为特征的发展阶段。

2.机电一体化概要

机电一体化是指在机构得主功能、动力功能、信息处理功能和控制功能上引进电子技术,将机械装置与电子化设计及软件结合起来所构成的系统的总称。

机电一体化发展至今也已成为一门有着自身体系的新型学科,随着科学技术的不但发展,还将被赋予新的内容。但其基本特征可概括为:机电一体化是从系统的观点出发,综合运用机械技术、微电子技术、自动控制技术、计算机技术、信息技术、传感测控技术、电力电子技术、接口技术、信息变换技术以及软件编程技术等群体技术,根据系统功能目标和优化组织目标,合理配置与布局各功能单元,在多功能、高质量、高可靠性、低能耗的意义上实现特定功能价值,并使整个系统最优化的系统工程技术。由此而产生的功能系统,则成为一个机电一体化系统或机电一体化产品。

因此,“机电一体化”涵盖“技术”和“产品”两个方面。只是,机电一体化技术是基于上述群体技术有机融合的一种综合技术,而不是机械技术、微电子技术以及其它新技术的简单组合、拼凑。这是机电一体化与机械加电气所形成的机械电气化在概念上的根本区别。机械工程技术有纯技术发展到机械电气化,仍属传统机械,其主要功能依然是代替和放大的体力。但是发展到机电一体化后,其中的微电子装置除可取代某些机械部件的原有功能外,还能赋予许多新的功能,如自动检测、自动处理信息、自动显示记录、自动调节与控制自动诊断与保护等。即机电一体化产品不仅是人的手与肢体的延伸,还是人的感官与头脑的眼神,具有智能化的特征是机电一体化与机械电气化在功能上的本质区别。

3.机电一体化的发展状况

机电一体化的发展大体可以分为3个阶段。20世纪60年代以前为第一阶段,这一阶段称为初级阶段。在这一时期,人们自觉不自觉地利用电子技术的初步成果来完善机械产品的性能。特别是在第二次世界大战期间,战争刺激了机械产品与电子技术的结合,这些机电结合的军用技术,战后转为民用,对战后经济的恢复起了积极的作用。那时研制和开发从总体上看还处于自发状态。由于当时电子技术的发展尚未达到一定水平,机械技术与电子技术的结合还不可能广泛和深入发展,已经开发的产品也无法大量推广。

20世纪70~80年代为第二阶段,可称为蓬勃发展阶段。这一时期,计算机技术、控制技术、通信技术的发展,为机电一体化的发展奠定了技术基础。大规模、超大规模集成电路和微型计算机的迅猛发展,为机电一体化的发展提供了充分的物质基础。这个时期的特点是:①首先在日本被普遍接受,大约到20世纪80年代末期在世界范围内得到比较广泛的承认;②机电一体化技术和产品得到了极大发展;③各国均开始对机电一体化技术和产品给以很大的关注和支持。

化进入深入发展时期。一方面,光学、通信技术等进入了20世纪90年代后期,开始了机电一体化技术向智能化方向迈进的新阶段,机电一体机电一体化,微细加工技术也在机电一体化中崭露头脚,出现了光机电一体化和微机电一体化等新分支;另一方面对机电一体化系统的建模设计、分析和集成方法,机电一体化的学科体系和发展趋势都进行了深入研究。同时,由于人工智能技术、神经网络技术及光纤技术等领域取得的巨大进步,为机电一体化技术开辟了发展的广阔天地。这些研究,将促使机电一体化进一步建立完整的基础和逐渐形成完整的科学体系。

我国是从20世纪80年代初才开始在这方面研究和应用。国务院成立了机电一体化领导小组并将该技术列为“863计划”中。在制定“九五”规划和2010年发展纲要时充分考虑了国际上关于机电一体化技术的发展动向和由此可能带来的影响。许多大专院校、研究机构及一些大中型企业对这一技术的发展及应用做了大量的工作,不取得了一定成果,但与日本等先进国家相比仍有相当差距。4.机电一体化的发展趋势

机电一体化是集机械、电子、光学、控制、计算机、信息等多学科的交叉综合,它的发展和进步依赖并促进相关技术的发展和进步。因此,机电一体化的主要发展方向如下:

4.1智能化

智能化是21世纪机电一体化技术发展的一个重要发展方向。人工智能在机电一体化建设者的研究日益得到重视,机器人与数控机床的智能化就是重要应用。这里所说的“智能化”是对机器行为的描述,是在控制理论的基础上,吸收人工智能、运筹学、计算机科学、模糊数学、心理学、生理学和混沌动力学等新思想、新方法,模拟人类智能,使它具有判断推理、逻辑思维、自主决策等能力,以求得到更高的控制目标。诚然,使机电一体化产品具有与人完全相同的智能,是不可能的,也是不必要的。但是,高性能、高速的微处理器使机电一体化产品赋有低级智能或人的部分智能,则是完全可能而又必要的。

在现代制造过程中,信息不仅已成为主宰制造产业的决定性因素,而且还是最活跃的驱动因素。提高制造系统的信息处理能力已成为现代制造科学发展的一个重点。由于制造系统信息组织和结构的多层次性,制造信息的获取、集成与融合呈现出立体性、信息度量的多维性、以及信息组织的多层次性。在制造信息的结构模型、制造信息的一致性约束、传播处理和海量数据的制造知识库管理等方面,都还有待进一步突破。

各种人工智能工具和计算智能方法在制造中的广泛应用促进了制造智能的发展。一类基于生物进化算法的计算智能工具,在包括调度问题在内的组合优化

求解技术领域中,受到越来越普遍的关注,有望在制造中完成组合优化问题时的求解速度和求解精度方面双双突破问题规模的制约。制造智能还表现在:智能调度、智能设计、智能加工、机器人学、智能控制、智能工艺规划、智能诊断等多方面。

现代机械工程的前沿科学间的交叉融合将产生新的科学聚集,经济的发展和社会的进步对科学技术产生了新的要求和期望,从而形成前沿科学。前沿科学也就是已解决的和未解决的科学问题之间的界域。前沿科学具有明显的时域、领域和动态特性。工程前沿科学区别于一般基础科学的重要特征是它涵盖了工程实际中出现的关键科学技术问题。

制造系统是一个复杂的大系统,为满足制造系统敏捷性、快速响应和快速重组的能力,必须借鉴信息科学、生命科学和社会科学等多学科的研究成果,探索制造系统新的体系结构、制造模式和制造系统有效的运行机制。制造系统优化的组织结构和良好的运行状况是制造系统建模、仿真和优化的主要目标。制造系统新的体系结构不仅对制造企业的敏捷性和对需求的响应能力及可重组能力有重要意义,而且对制造企业底层生产设备的柔性和可动态重组能力提出了更高的要求。生物制造观越来越多地被引入制造系统,以满足制造系统新的要求。

21世纪将是生命科学的世纪,机械科学和生命科学的深度融合将产生全新概念的产品(如智能仿生结构),开发出新工艺(如生长成形工艺)和开辟一系列的新产业,并为解决产品设计、制造过程和系统中一系列难题提供新的解决方法。这是一个极富创新和挑战的前沿领域。

从生命现象中学习组织与运行复杂系统的方法和技巧,是今后解决目前制造业所面临许多难题的一条有效出路。仿生制造指的是模仿生物器官的自组织、自愈合、自增长与自进化等功能结构和运行模式的一种制造系统与制造过程。

制造在机制的驱动下,在组织结构和运行模式上不断自我完善、从而提高对于环境适应能力的过程。为自下而上的产品并行设计、制造工艺规程的自动生成、生产系统的动态重组以及产品和制造系统的自动趋优提供了理论基础和实现条件。

制造属于制造科学和生命科学的"远缘杂交",它将对21世纪的制造业产生巨大的影响。

制造的研究内容目前有两个方面:

面向生命的仿生制造

研究生命现象的一般规律和模型,例如人工生命、细胞自动机、生物的信息处理技巧、生物智能、生物型的组织结构和运行模式以及生物的进化和趋优机制等;

面向制造的仿生制造

研究仿生制造系统的自组织机制与方法,例如:基于充分信息共享的仿生设计原理,基于多自律单元协同的分布式控制和基于进化机制的寻优策略;研究仿生制造的概念体系及其基础,例如:仿生空间的形式化描述及其信息映射关系,仿生系统及其演化过程的复杂度计量方法。

机械仿生与仿生制造是机械科学与生命科学、信息科学、材料科学等学科的高度融合,其研究内容包括生长成形工艺、仿生设计和制造系统、智能仿生机械和生物成形制造等。目前所做的研究工作大多属前沿探索性的工作,具有鲜明的基础研究的特点,如果抓住机遇研究下去,将可能产生革命性的突破。今后应关注的研究领域有生物加工技术、仿生制造系统、基于快速原型制造技术的组织工程学,以及与生物工程相关的关键技术基础等。 3 现代制造技术的发展趋势20世纪90年代以来,世界各国都把制造技术的研究和开发作为国家的关键技术进行优先发展,如美国的先进制造技术计划AMTP、日本的智能制造技术(IMS)国际合作计划、韩国的高级现代技术国家计划(G--7)、德国的制造2000计划和欧共体的ESPRIT和BRITE-EURAM计划。

随着电子、信息等高新技术的不断发展,市场需求个性化与多样化,未来现代制造技术发展的总趋势是向精密化、柔性化、网络化、虚拟化、智能化、绿色集成化、全球化的方向发展。

当前现代制造技术的发展趋势大致有以下九个方面:(1) 信息技术、管理技术与工艺技术紧密结合,现代制造生产模式会获得不断发展。(2) 设计技术与手段更现代化。(3) 成型及制造技术精密化、制造过程实现低能耗。(4) 新型特种加工方法的形成。(5) 开发新一代超精密、超高速制造装备。(6) 加工工艺由技艺发展为工程科学。(7) 实施无污染绿色制造。(8) 制造业中广泛应用虚拟现实技术。

4.2模块化

模块化是一项重要而艰巨的工程。由于机电一体化产品种类和生产厂家繁多,研制和开发具有标准机械接口、电气接口、动力接口、环境接口的机电一体化产品单元是一项十分复杂但又是非常重要的事。如研制集减速、智能调速、电机于一体的动力单元,具有视觉、图像处理、识别和测距等功能的控制单元,以及各种能完成典型操作的机械装置。这样,可利用标准单元迅速开发出新产品,同时也可以扩大生产规模。这需要制定各项标准,以便各部件、单元的匹配和接口。由于利益冲突,近期很难制定国际或国内这方面的标准,但可以通过组建一些大企业逐渐形成。显然,从电气产品的标准化、系列化带来的好处可以肯定,无论是对生产标准机电一体化单元的企业还是对生产机电一体化产品的企业,规模化

将给机电一体化企业带来美好的前程。

4.3网络化

20世纪90年代,计算机技术等的突出成就是网络技术。网络技术的兴起和飞速发展给科学技术、工业生产、政治、军事、教育义举人么日常生活都带来了巨大的变革。各种网络将全球经济、生产连成一片,企业间的竞争也将全球化。机电一体化新产品一旦研制出来,只要其功能独到,质量可靠,很快就会畅销全球。由于网络的普及,基于网络的各种远程控制和监视技术方兴未艾,而远程控制的终端设备本身就是机电一体化产品。现场总线和局域网技术是家用电器网络化已成大势,利用家庭网络(home net)将各种家用电器连接成以计算机为中心的计算机集成家电系统(computer integrated appliance system, CIAS),使人们在家里分享各种高技术带来的便利与快乐。因此,机电一体化产品无疑朝着网络化方向发展。

4.4微型化

微型化兴起于20世纪80年代末,指的是机电一体化向微型机器和微观领域发展的趋势。国外称其为微电子机械系统(MEMS),泛指几何尺寸不超过1-3CM 的机电一体化产品,并向微米、纳米级发展。微机电一体化产品体积小、耗能少、运动灵活,在生物医疗、军事、信息等方面具有不可比拟的优势。微机电一体化发展的瓶颈在于微机械技术,微机电一体化产品的加工采用精细加工技术,即超精密技术,它包括光刻技术和蚀刻技术两类。

4.5绿色化

工业的发达给人们生活带来了巨大变化。一方面,物质丰富,生活舒适;另一方面,资源减少,生态环境受到严重污染。于是,人们呼吁保护环境资源,回归自然。绿色产品概念在这种呼声下应运而生,绿色化是时代的趋势。绿色产品在其设计、制造、使用和销毁的生命过程中,符合特定的环境保护和人类健康的要求,对生态环境无害或危害极少,资源利用率极高。设计绿色的机电一体化产品,具有远大的发展前途。机电一体化产品的绿色化主要是指,使用时不污染生态环境,报废后能回收利用。

4.6系统化

系统化的表现特征之一就是系统体系结构进一步采用开放式和模式化的总线结构。系统可以灵活组态,进行任意剪裁和组合,同时寻求实现多子系统协调控制和综合管理。表现之二是通信功能的大大加强,一般除RS232外,还有RS485、DCS人格化。未来的机电一体化更加注重产品与人的关系,机电一体化的人格化有两层含义。一层是,机电一体化产品的最终使用对象是人,如何赋予机电一体化产品人的智能、情感、人性显得越来越重要,特别是对家用机器人,其高层境

界就是人机一体化。另一层是模仿生物机理,研制各种机电一体花产品。事实上,许多机电一体化产品都是受动物的启发研制出来的。

5.结语

综上所述,机电一体化的出现不是孤立的,它是许多科学技术发展的结晶,是社会生产力发展到一定阶段的必然要求。当然,与机电一体化相关的技术还有很多,并且随着科学技术的发展,各种技术相互融合的趋势将越来越明显,机电一体化技术的广阔发展前景也将越来越光明。

机械毕业设计英文外文翻译460数字控制 (2)

附录 科技译文: Numerical Control Numerical Control(NC) is a method of controlling the movements of machineComponents by directly inserting coded instructions in the form of numerical data(numbers and data ) into the system.The system automatically interprets these data and converts to output signals. These signals ,in turn control various machine components ,such as turning spindles on and off ,changing tools,moving the work piece or the tools along specific paths,and turning cutting fluits on and off. In order to appreciate the importer of numerical control of machines ,let’s briefly review how a process such as machining has been carried out traditionally .After studying the working drawing of a part, the operator sets up the appropriate process parameters(such as cutting speed ,feed,depth of cut,cutting fluid ,and so on),determines the sequence of operations to be performed,clamps the work piece in a workholding device such as chuck or collet ,and proceeds to make the part .Depending on part shape and the dimensional accuracy specified ,this approach usually requires skilled

机械专业毕业论文外文翻译

附录一英文科技文献翻译 英文原文: Experimental investigation of laser surface textured parallel thrust bearings Performance enhancements by laser surface texturing (LST) of parallel-thrust bearings is experimentally investigated. Test results are compared with a theoretical model and good correlation is found over the relevant operating conditions. A compari- son of the performance of unidirectional and bi-directional partial-LST bearings with that of a baseline, untextured bearing is presented showing the bene?ts of LST in terms of increased clearance and reduced friction. KEY WORDS: ?uid ?lm bearings, slider bearings, surface texturing 1. Introduction The classical theory of hydrodynamic lubrication yields linear (Couette) velocity distribution with zero pressure gradients between smooth parallel surfaces under steady-state sliding. This results in an unstable hydrodynamic ?lm that would collapse under any external force acting normal to the surfaces. However, experience shows that stable lubricating ?lms can develop between parallel sliding surfaces, generally because of some mechanism that relaxes one or more of the assumptions of the classical theory. A stable ?uid ?lm with su?cient load-carrying capacity in parallel sliding surfaces can be obtained, for example, with macro or micro surface structure of di?erent types. These include waviness [1] and protruding microasperities [2–4]. A good literature review on the subject can be found in Ref. [5]. More recently, laser surface texturing (LST) [6–8], as well as inlet roughening by longitudinal or transverse grooves [9] were suggested to provide load capacity in parallel sliding. The inlet roughness concept of Tonder [9] is based on ??e?ective clearance‘‘ reduction in the sliding direction and in this respect it is identical to the par- tial-LST concept described in ref. [10] for generating hydrostatic e?ect in high-pressure mechanical seals. Very recently Wang et al. [11] demonstrated experimentally a doubling of the load-carrying capacity for the surface- texture design by reactive ion etching of SiC

【机械类文献翻译】机电一体化全自动横切机

An Automatic MechanotronicsHorizontal Cutter 机电一体化全自动横切机 1.Say after70's in20centuries the our country sun float the method glass technique invention,our country of float method glass,the industry develops quickly.Currently,the our country is the world is the biggest to float the method glass production country,2006our country of float method glass,the production line has more than160s totally,adopting among them our country the sun float method glass to float method glass technically,the production line has more than130s totally, floating the method glass total yield already more than454,000,000,and yield annually all significant increment.But our country the洛sun float the method glass technique material and other nations to compare automation degree still very low,has been being placed in the half auto half artificial appearance,raise completely our country the洛sun float method glass a technique a material level,developing whole lineses allied lock follow produce the technique have already forced in the eyebrow.Currently,our country the sun float method glass a technique a material to mainly be placed in a single machine dispersion control stage(or part of llied lock control),rush through super nations float method glass a technique a material level, have to raise first our country the automation function of the single machine equipments.Horizontal slice machine conduct and actions to float method glass cold carry to produce one of the on-line important equipmentses,its automation degree and incise accuracy will influence the finished product rate that the glass produces,we introduce a kind of machine electricity integral whole to turn here full-automatic horizontal slice machine 1、述自20世纪70年代我国洛阳浮法玻璃技术发明之后,我国的浮法玻璃工业迅速发展。目 前,我国是世界最大浮法玻璃生产国,2006年我国的浮法玻璃生产线共有160多条,其中采用我国洛阳浮法玻璃技术的浮法玻璃生产线共有130多条,浮法玻璃总产量已超过4.54亿重量箱,而且产量每年都大幅度增加。但我国洛阳浮法玻璃技术装备与其它国家相比自动化程度还很低,一直处在半自动半人工状态,全面提高我国洛阳浮法玻璃技术装备水平,开发全线联锁跟踪生产技术已迫在眉捷。目前,我国洛阳浮法玻璃技术装备主要处于单机分散控制阶段(或部分联锁控制),要赶超国际浮法玻璃技术装备水平,首先必须提高我国单机设备的自动化功能。横切机作为浮法玻璃冷端生产线上的重要设备之一,其自动化程度及切割精度将影响玻璃生产的成品率,在此我们介绍一种机电一体化全自动横切机(见图1)。

毕业设计外文翻译资料

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