自動化專業畢業設計--中英文翻譯-其他專業(編輯修改稿)

　

【文章內容簡介】 ain function of governance is based on plantlevel production of varieties issued, the number of orders and collect up the production process of the state of information, at any time reasonable schedule to achieve optimal control, mand and SCClevel supervisory control. Factory management level MIS main function is to accept the pany and factory production tasks assigned by the actual situation of optimized puting, Zhi Ding factory production plans and shortterm (ten days or weeks or days) arrangements, and then issued to the plantlevel production tasks. Corporate governance level MIS main function is to guess the market demand puting to develop strategic longterm development planning, and contract orders, raw material supply situation and the production conditions, parison of the optimal production program selection and calculation, work out the entire pany business a long time (months or ten days) of the production plan, sales plan, assigned to the task of the factory management level. MISlevel main function is to achieve realtime information processing, decisionmakers at all levels to provide useful information, make on the production planning \ scheduling and management programs to plan the coordination and management control in the optimal state. This one can control the size and scope of enterprise size divided into several levels. Each level has to be addressed according 5 to the size of the amount of information to determine the type of puter used. MIS generally use small puter shop class or highgrade microputer, the factory management level of the MIS with a mediumsized puter, and corporate governance level MIS is to use largescale puter, or use super puter. 4, distributed control or distributed control system distributed control or distributed control, the control system is divided into a number of independent local control subsystems to plete the controlled production process control task. Since the emergence of microputers and rapid development of distributed control to provide for the realization of the material and technical basis, in recent years, decentralized control can be different almost normal development, and has bee an important trend in the development of puter control. Since the 7039。s, appeared focused on distributed control system, called DCS. It is a decentralized local control of the new puter control system. Three, classified according to the law regulating 1, program control if the puter control system the division of a predetermined time function control, such control is called program control. Such as the furnace temperaturetime curves Anzhao some control on the process control. Here the procedure is timevarying changes have to determine the corresponding value, rather than the puter running. 2, sequence control in the process control based on the generated sequence control, puter, over time, as can be determined according to the corresponding control value and previous results at the moment both to exercise on the production process control system, called the order of the puter control . 3, proportional integral differential analog PID control regulation of conventional PID control instrument can be pleted. Microputer can also be achieved with PID control. 4, feedforward control is usually the feedback control system, have certain effects on the interference in order to generate feedback over the role of inhibitory control of interference, a