压力装置比值控制系统的设计.pdfVIP

压力装置比值控制系统的设计 摘 要 凡使两种或两种以上物料流量自动维持一定比值关系的过程控制系统，统称 为流量比值控制系统。本次设计的是一套压力装置单闭环比值控制实验装置。此 设计的控制系统属于复杂控制，在实际的化工生产过程控制中应用广泛。单闭环 比值控制系统是为了克服开环比值方案的不足，在开环比值控制系统的基础上， 增加一个副流量的闭环控制系统.单闭环比值控制系统的优点是它不但能实现副 流量跟随主流量的变化而变化，而且可以克服副流量本身干扰对比值的影响，因 此主副流量的比值较为精确。它结构形式较为简单，实施起来亦较方便，所以得 到广泛的应用。这套装置属于复杂控制实验装置，具有一定的实用性，可行性。 关键词：比值控制，单闭环，复杂控制，实验装置，主流量， 副流量 1 压力装置比值控制系统的设计 Abstract The process control system is flow proportional control system which make two or more than two materiel’s flow could maintain to a certain proportion. A pressure experimental device is discussed in this paper which is a single closed-loops proportional control 。The single closed-loops proportional control system is design for conquer the primary flow of open closed-loop proportional control system is couldn’t control, and the fault of produce’s load fluctuate in a large range. A single closed-loops proportional control system increase a vice- discharge shut the wreath control system.It is single to shut the advantage that wreath specific value control the system is it not only can realize the vice- discharge follow behind the variety that main current measures but variety, but also can overcome the vice- discharge oneself the interference contrast the worth influence, the for this reason main a specific value of discharge is more accurate. Its construction form is more simple, putting into practice as well more convenient, so get the extensive application. The control system of this design belongs to the complicated