本文選題：重介質(zhì)選煤 + 集中控制系統(tǒng)��； 參考：《中國礦業(yè)大學》2015年碩士論文

【摘要】：重介質(zhì)選煤是目前被廣泛采用的一種選煤技術(shù),具有分選粒度范圍廣、效率高,且易于實現(xiàn)自動控制等優(yōu)點。影響重介質(zhì)選煤的工藝參數(shù)很多,且各參數(shù)之間相互耦合,難以控制,其中最重要的參數(shù)為重介質(zhì)懸浮液密度。本文以蔣莊礦選煤廠設(shè)備升級改造項目為研究背景,在可編程控制器和工業(yè)以太網(wǎng)的基礎(chǔ)上設(shè)計一套重介質(zhì)選煤集中控制系統(tǒng),該集中控制系統(tǒng)主要選用西門子S7-1500PLC和工業(yè)計算機作為集中控制系統(tǒng)的核心,完成對現(xiàn)場設(shè)備的信息采集與控制,并利用西門子最新推出的博途軟件和Win CC軟件進行下位機和上位機的編程。首先,本文介紹重介質(zhì)選煤的基本原理和工藝流程,通過對現(xiàn)有的數(shù)學模型進行分析,并且按照選煤廠實際生產(chǎn)運行狀況確定數(shù)學模型參數(shù)。根據(jù)系統(tǒng)控制要求,提出將模糊控制與比例積分微分(PID)控制相結(jié)合的控制方法,設(shè)計重介質(zhì)懸浮液密度的自整定模糊PID控制器。研究對象為重介質(zhì)懸浮液密度,初始密度由上位機給定,實際密度由現(xiàn)場射線密度計獲得。采用二維模糊控制器,輸入為重介質(zhì)懸浮液密度偏差e和偏差率?e,通過設(shè)計的模糊規(guī)則,在線調(diào)整參數(shù)PK、IK、DK。在Matlab/Simulink平臺下對控制系統(tǒng)進行仿真,應(yīng)用PLC編寫控制程序完成控制,結(jié)果表明,系統(tǒng)響應(yīng)時間短,超調(diào)量小,動態(tài)性能好,滿足控制需求。
[Abstract]:Heavy medium coal preparation is a widely used coal preparation technology, which has the advantages of wide separation granularity, high efficiency, and easy to realize automatic control. There are many technological parameters which affect the preparation of coal in heavy medium, and the parameters are coupled with each other, so it is difficult to control. The most important parameter is the density of suspensions in heavy medium. Based on the equipment upgrading project of Jiangzhuang Coal preparation Plant, a centralized control system for heavy medium coal separation is designed on the basis of programmable controller and industrial Ethernet. The centralized control system mainly selects Siemens S7-1500PLC and industrial computer as the core of the centralized control system to complete the information collection and control of the field equipment. The programming of lower computer and upper computer is carried out by using Siemens' latest software and Win CC software. First of all, this paper introduces the basic principle and technological process of heavy medium coal preparation, analyzes the existing mathematical models, and determines the mathematical model parameters according to the actual operating conditions of the coal preparation plant. According to the requirement of system control, a fuzzy control method combining fuzzy control with proportional integral differential (PD) control is proposed to design a self-tuning fuzzy PID controller for the density of heavy medium suspensions. The object of study is the density of heavy medium suspension, the initial density is given by the host computer, and the actual density is obtained by the field ray densitometer. A two dimensional fuzzy controller is used. The input is the density deviation e and the deviation rate of the heavy medium suspension. The parameters PKK / DK are adjusted on-line by the fuzzy rules designed. The control system is simulated on the Matlab/Simulink platform, and the control program is written by PLC. The results show that the system has the advantages of short response time, small overshoot, good dynamic performance and satisfying the control requirements.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD67;TP273

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本文編號：1912976