本文關(guān)鍵詞： 多機拖動 變頻驅(qū)動 功率平衡 模糊控制　出處：《西安科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：膠帶輸送機是當(dāng)今在采礦、冶金、物流輸送等行業(yè)中廣泛應(yīng)用的單位運費最低廉的散狀物料運輸設(shè)備。特別是性能比較高的大功率傳動設(shè)備,急需膠帶輸送機朝著高速率、大功率、大容量的趨勢發(fā)展,因此大多采用多電機拖動。由于膠帶輸送機本身的特點、電動機機械特性的差異以及負載的特性等因素,系統(tǒng)在實際運行時,各臺電機會出現(xiàn)出力不均衡的狀況,即功率不平衡。由此將產(chǎn)生安全性能低、能源消耗量大等問題。為此,多機間功率的平衡是保證其正常運行的必要條件。本文針對井下多機驅(qū)動膠帶運輸機產(chǎn)生的功率不平衡問題,研究多機間功率平衡的控制算法,采用實驗室模擬膠帶輸送機系統(tǒng)的實驗裝置,驗證所研究控制算法的有效性。第一部分基于理論基礎(chǔ)研究功率平衡控制算法。首先從動態(tài)和靜態(tài)兩方面分析功率不平衡的影響因素;然后闡述由于電動機機械特性的不同導(dǎo)致功率不平衡,理論上調(diào)節(jié)平衡的過程;其次研究多機連接的兩種方式,即剛性連接和柔性連接,給出了系統(tǒng)控制框圖;最后在學(xué)習(xí)模糊控制理論的基礎(chǔ)上,研究模糊PID控制算法。第二部分設(shè)計控制系統(tǒng)的軟硬件,調(diào)試并驗證所研究的控制算法。首先設(shè)計多電機驅(qū)動膠帶輸送機的主電路和AB PLC三層網(wǎng)絡(luò)控制電路,搭建實驗平臺;然后依據(jù)主從控制的思想,設(shè)計載荷給定、單機調(diào)速和功率平衡控制算法的流程圖,并編寫對應(yīng)的程序;最后實驗,一方面采用傳統(tǒng)PID控制算法,使電機在不同載荷給定下能夠平穩(wěn)運行,另一方面采用模糊PID控制算法,使電機間功率平衡。實驗曲線標(biāo)明,隨著載荷的增加,通過調(diào)整電機的機械特性,每臺電機能夠平穩(wěn)運行,多電機間的扭矩平衡分配。
[Abstract]:Belt conveyor is widely used in mining, metallurgy, logistics transportation and other industries, the unit transportation of bulk materials is the cheapest transportation equipment, especially the high-power transmission equipment with high performance. Belt conveyors are in urgent need of high speed, high power and large capacity, so most of them are driven by multi-motor, because of the characteristics of belt conveyors themselves. Because of the difference of the mechanical characteristics of the motor and the characteristics of the load, when the system is in operation, there will be unbalanced output force of each motor, that is, the power imbalance, which will result in low safety performance. For this reason, the balance of power between multiple machines is a necessary condition to ensure its normal operation. This paper aims at the power imbalance caused by multi-machine driving belt conveyor. The control algorithm of power balance between multiple machines is studied, and the experimental device is used to simulate the belt conveyor system in laboratory. In the first part, the power balance control algorithm is studied based on the theoretical basis. Firstly, the influence factors of power imbalance are analyzed from the dynamic and static aspects. Then the paper expounds the process of adjusting the balance theoretically because of the imbalance of power caused by the different mechanical characteristics of the motor. Secondly, two methods of multi-machine connection, rigid connection and flexible connection, are studied, and the system control block diagram is given. Finally, on the basis of learning the fuzzy control theory, the fuzzy PID control algorithm is studied. The second part designs the software and hardware of the control system. First, the main circuit of multi-motor driven belt conveyor and AB PLC three-layer network control circuit are designed, and the experimental platform is built. Then, according to the idea of master-slave control, the flow chart of load given, single machine speed regulation and power balance control algorithm is designed, and the corresponding program is written. Finally, on the one hand, the traditional PID control algorithm is used to make the motor run smoothly under different loads, on the other hand, the fuzzy PID control algorithm is used to balance the power between the motors. With the increase of load, by adjusting the mechanical characteristics of the motor, each motor can run smoothly and distribute the torque balance among the multi-motors.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD528.1

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本文編號：1446222