DCS中英文翻译毕业论文控制系统.docx

1、DCS中英文翻译毕业论文控制系统英文翻译DCSDCS Distributed Control System is the abbreviation of (Distributed Control System), automation industry in the country is also known as distributed control system. The so-called distributed control system, or in some of the information in the call distribution system, as oppos

2、ed to centralized control systems, a new computer control system, which is a centralized control system based on the development, evolution and come. It is a process by the process control level and the composition of monitoring level communications network as a link to the multi-level computer syst

3、ems, integrated computer, communication, display and control technologies such as 4C, the basic idea is decentralized control, centralized operations, hierarchical management , flexible configuration, and configuration easy. Function in the system, DCS, and centralized control systems are not very d

4、ifferent, but in the realization of system functions methods are completely different.First, DCSs skeleton - the system network, which is the foundation and core DCS. As the network of the system for real-time DCS, reliability and scalability, play a decisive role, so the manufacturers have been car

5、eful in this area of design. For the DCS system network, it must meet the requirements of real-time, that is completed within defined time limits transmission of information. Here the word determine the time limit is in any case, the information transfer can be completed within this time limit, and

6、this time limit is based on real-time controlled process requirements identified. Therefore, indicators of network performance measurement system is not the networks rate, known as bits per second (bps), but the real-time system network, which can ensure the long period of time to complete the requi

7、red information transmission . System network also must be very reliable in any case, network communications are not interrupted, so most manufacturers of DCS were double bus, ring or dual star network topology. Scalability to meet the requirements of the system, the system can accessthe network sho

8、uld be higher than the maximum number of nodes in the large number of nodes actually used several times. In this way, one can always add a new node, it can also make the system run in a lighter network traffic load conditions, to ensure that the system real-time and reliability. During the actual op

9、eration of the system, each node of the Internet and the net may occur at any time, in particular, operator stations, so that reconfiguration will always be, and this operation must not affect the normal operation, therefore, the system network should have a strong online network reconfiguration fun

10、ctions.Secondly, this is a completely on-site I / O processing and realization of direct digital control (DDC) feature of network nodes. To set the general scene in a DCS I / O controllers, to share the entire system I / O and control functions. This site can be avoided due to a failure caused by th

11、e failure of the entire system, improve system reliability, the site also allows sharing of data acquisition and control functions, will help improve overall system performance. DCS operator station is run operation to deal with all the human-machine interface (HMI-Human Machine Interface, or operat

12、or interface) function of network nodes.DCS engineer station is off-line configuration, the system configuration work, and online monitoring, control, maintenance of the network node, and its main function is to provide to the DCS configuration, software configuration tool (ie, the configuration sof

13、tware) and running online in real time DCS DCS network to monitor the operation of each node, the system engineer can engineer station to adjust the system configuration settings and some system parameters,the DCS at any time under the best working condition. And centralized control systems, are req

14、uired to have all of the DCS system configuration functions, it can be said, no system configuration functions of the system can not be called as a DCS.DCS since its inception in 1975, has already experienced twenty years of development. In two decades, DCS system architecture although there is no s

15、ignificant change, but through constant development and improvement of its functionality and performance have been a huge increase. In general, DCS is toward more open, more standardized product in the direction of development.As the field of processautomation computer control system, the traditiona

16、l DCS is only a narrow concept. If only the production process that DCS automation system, which will lead to wrong conclusions, because the meaning of the computer control system has been greatly expanded, and it includes not only the DCS in the past included a variety of content, but also drill do

17、wn to the each site measuring equipment, implementing agencies, upwards to the production management, all aspects of business. Traditional DCS now only refers to this part of the production process control automation, and industrial automation system concept, should be targeted to enterprise-wide so

18、lution, total solution level. Only from this perspective to ask questions and solve problems, to really play the computer automation of its role. DCS has the following characteristics:(1)high reliability. DCS system to control the spread of the computer implementation, the system uses fault-tolerant

19、 design of the structure, so a computer system malfunction will not cause the loss of other functions. In addition, each computer system, the tasks undertaken by relatively simple functions can be used for the need to achieve a specific structure and special computer software, so that the reliabilit

20、y of each computer system has also been improved.(2)open. DCS an open, standardized, modular and serial design, the system means each computer using the LAN communication, to achieve information transmission, when the need to change or expand the system functionality can be added easily connected to

21、 a computer system communication network or Remove from the network, almost does not affect the work of other computer systems.History of development of DCSDCS Distributed Control System is the abbreviation of (Distributed Control System), automation industry in the country is also known as distribu

22、ted control system. It is a process by the process control level and the composition of monitoring level communications network as a link to the multi-level computer systems, integrated computer (Computer), communication (Communication), display (CRT) and control (Control) and other 4C technology, T

23、he basic idea is decentralized control, centralized operations, hierarchical management, flexible configuration, easy configuration. ) Its development can be divided into three stages.Stage :1975-1980, during this period the technical characteristics of distributed control system as follows:1)using

24、microprocessor-based control unit, to achieve decentralized control, a wide variety of algorithms, through the loop control configuration independently, with self-diagnostic function2)The operating station with a CRT display unit and the process of separation, centralized monitoring, centralized ope

25、ration3)a more advanced communication system redundancyThe second phase :1980-1985., Distributed control system during this period the technical features as follows:1)increase the number of bits microprocessors, CRT display resolution to improve2)strengthening the modular system3)strengthen the syst

26、em of information management, strengthening communication The third phase, after 1985, the third generation of distributed systems, and its technical characteristics were as follows:1)The adoption of open systems management2)32-bit microprocessor operating station3)using real-time multi-user multi-t

27、asking operating systemInto the next decade, computer technology advances, more new technology is being applied to the DCS. PLC is a sequential logic control developed for electronic equipment, which is used instead of inflexible and cumbersome relay logic. Fieldbus Technology in entering developed

28、very rapidly since the mid nineties that some people have to predict: FCS based on field bus control system will replace the DCS as the protagonist.DCS is a Data Communication Subsystem (data communications subsystems) for short.To rail transportation industry, for example, DCS is a pure non-transpa

29、rent security system, he is sent between the control center and train carrier packet.DCS second layer of meaning: Dorsal Column Stimulator medical spine stimulatorIn the special control areas, such as nuclear power plant control system, DCS is the meaning of digital control system (Digital control s

30、ystem).DCS main domestic manufacturers are: Shanghai Xinhua, the super control, State Power Zhishen, Zhejiang University in control, and Belgium, Shanghai Chinese, Shanghai Leroy, from Zhejiang and so on. There Westinghouse abroad (Emerson), FOXBORO, ABB, Siemens, Honeywell, Yokogawa, Yamatake - Hon

31、eywell, FISHER-ROSEMOUNT companiesOverview of characteristics and development of DCSDCS is a distributed control system (Distributed Control System) for short, is commonly called the domestic general distributed control system. It is a process by the process control level and the composition of moni

32、toring level communications network as a link to the multi-level computer systems, integrated computer (Computer), communication (Communication), display (CRT) and control (Control) technologies such as 4C, the The basic idea is decentralized control, centralized operations, hierarchical management,

33、 flexible configuration, easy configuration.DCS has the following characteristics:(1) high reliability of the DCS system to control the spread of the computer implementation, the system uses fault-tolerant design of the structure, so a computer system malfunction will not cause the loss of other functions. In addition, each co