【摘要】：目前,選礦工藝越來越復(fù)雜,選礦設(shè)備日益精進,且現(xiàn)場傳感器及執(zhí)行設(shè)備都朝著智能化、信息化、數(shù)字化方向發(fā)展,因此對選礦廠的監(jiān)控水平和管理水平要求越來越高。選礦廠選礦工藝過程是一個比較復(fù)雜的控制過程,各變量參數(shù)間耦合嚴重,非線性且慣性大,時滯性嚴重,因此采用傳統(tǒng)的控制方式無法對其產(chǎn)生很好的控制效果。本文以某選礦廠作為背景,根據(jù)選礦廠生產(chǎn)現(xiàn)狀,采用先進的智能控制算法以及高性能軟硬件和監(jiān)控組態(tài)軟件對選礦廠的監(jiān)控系統(tǒng)進行研究設(shè)計。本文首先分析了選礦廠破碎篩分及磨礦分級的工藝流程,給出了各控制量的控制方法。在此基礎(chǔ)上,引入了模糊控制算法,并對球磨機給礦量及分級機溢流濃度兩個控制量進行了模糊控制,給出了相應(yīng)的語言賦值表,控制規(guī)則表及模糊控制查詢表。將選礦廠自動化通信采用三級網(wǎng)絡(luò)結(jié)構(gòu),分別為現(xiàn)場設(shè)備層、車間監(jiān)控層和工廠管理層。整個自動化控制系統(tǒng)分為一個中心控制主站(PLC主站),2個遠程數(shù)據(jù)I/O站。PLC主站負責(zé)整個廠區(qū)電氣設(shè)備自動化運行的協(xié)調(diào)、數(shù)據(jù)和邏輯運算以及與上位機的通信,PLC遠程I/O子站負責(zé)對設(shè)備運行狀態(tài)和儀器儀表數(shù)據(jù)的采集及控制。本文對各部分都進行了詳細的硬件配置,并給出了其I/O信號采集點。本文控制系統(tǒng)的軟件實現(xiàn)采用了STEP 7編程軟件,給出了該控制系統(tǒng)PLC程序部分所需要的組織塊和邏輯功能塊,以及功能塊與其各自對應(yīng)的背景數(shù)據(jù)塊。詳細說明了選礦廠控制系統(tǒng)程序流程,包括主程序流程、球磨機給礦量控制程序流程、球磨機磨礦濃度控制流程和螺旋分級機溢流濃度控制流程等幾個部分。對于控制系統(tǒng)實現(xiàn)的關(guān)鍵部分模糊控制的實現(xiàn),本文還給出了相應(yīng)的程序梯形圖。在控制系統(tǒng)上位機監(jiān)控組態(tài)軟件設(shè)計方面,說明了Win CC連接到S7自動化系統(tǒng)的通信方式。在Win CC的圖形編輯器中對廠房的過程畫面進行了設(shè)計,并對其按鈕以及I/O輸入/輸出域進行組態(tài)。對報警記錄及消息歸檔進行組態(tài),并以曲線形式顯示在畫面中。最后,對登陸畫面設(shè)置相應(yīng)的腳本函數(shù),實現(xiàn)用戶管理及授權(quán)。采用變量模擬器仿真運行結(jié)果顯示,該監(jiān)控系統(tǒng)基本實現(xiàn)了原本預(yù)定的控制要求。
[Abstract]:At present, the mineral processing technology is more and more complex, the processing equipment is becoming more and more sophisticated, and the field sensors and execution equipment are developing towards the direction of intelligence, information and digitization, so the monitoring level and management level of the concentrator are required to be higher and higher. The process of dressing process in concentrator is a complex control process. The parameters of each variable are coupled seriously, nonlinear and inertia is large, and the time delay is serious. Therefore, the traditional control method can not produce a good control effect on it. In this paper, based on the present production situation of a concentrator, advanced intelligent control algorithm, high performance hardware and software and monitoring configuration software are used to study and design the monitoring system of the concentrator. In this paper, the process flow of crushing, screening and grinding classification in concentrator is analyzed, and the control method of each control quantity is given. On the basis of this, the fuzzy control algorithm is introduced, and the fuzzy control of the feed quantity of ball mill and the overflow concentration of classifier is carried out. The corresponding language assignment table, control rule table and fuzzy control query table are given. The three-level network structure is adopted for the automatic communication of the concentrator, namely, the field equipment layer, the workshop monitoring layer and the factory management layer. The whole automation control system is divided into a central control master station (PLC master station), two remote data I / O stations. The PLC master station is responsible for the coordination of the automation operation of electrical equipment in the whole plant. The PLC remote I / O substation is responsible for collecting and controlling the running state of the equipment and the instrument data. In this paper, the hardware of each part is configured in detail, and the sampling point of I / O signal is given. In this paper, the STEP 7 programming software is used in the software implementation of the control system. The organization block and logical function block needed in the PLC program part of the control system and the corresponding background data blocks of the function block are given. The program flow of the control system of the concentrator is described in detail, including the main program flow, the control program flow of the feed ore quantity of the ball mill, the control flow of the grinding concentration of the ball mill and the overflow concentration control flow of the spiral classifier, etc. For the realization of the key part of the control system fuzzy control, the corresponding program ladder diagram is also given in this paper. The communication mode between Win CC and S7 automation system is explained in the design of supervisory configuration software of upper computer in control system. The process picture of the workshop is designed in the graphic editor of Win CC, and the buttons and I / O input / output fields are configured. The alarm record and message archiving are configured and displayed in the form of curves. Finally, the login screen set the corresponding script function to achieve user management and authorization. The simulation results of variable simulator show that the control system basically realizes the original control requirements.
【學(xué)位授予單位】：江蘇科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD928;TD67

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本文編號：2270432