本文選題：多機(jī)驅(qū)動 + 功率平衡�。� 參考：《中國礦業(yè)大學(xué)》2014年碩士論文

【摘要】：帶式輸送機(jī)是一種高效的散裝物料輸送設(shè)備，因其具有諸多優(yōu)點(diǎn)被廣泛地應(yīng)用于煤炭行業(yè)及其他眾多工業(yè)領(lǐng)域。隨著帶式輸送機(jī)的大型化，其驅(qū)動方式常采用多電機(jī)驅(qū)動，在多機(jī)驅(qū)動系統(tǒng)中需要解決的一個(gè)重要問題就是驅(qū)動電機(jī)的功率平衡。將模糊神經(jīng)網(wǎng)絡(luò)用于解決多電機(jī)功率平衡問題，具有響應(yīng)速度快，控制精度高等優(yōu)點(diǎn)。 本文詳細(xì)分析了多機(jī)驅(qū)動系統(tǒng)中出現(xiàn)功率不平衡現(xiàn)象的原因，結(jié)合可控起動傳輸(Controlled Start Transmission, CST)裝置的工作過程詳細(xì)闡述了其調(diào)節(jié)多電機(jī)功率平衡的原理，并針對帶式輸送機(jī)的實(shí)際啟動特點(diǎn)為其設(shè)計(jì)了理想的起動速度曲線。 本文對傳統(tǒng)的多電機(jī)功率平衡控制策略進(jìn)行對比分析，并對主從控制方式的多電機(jī)功率平衡控制系統(tǒng)進(jìn)行仿真。仿真結(jié)果顯示，采用傳統(tǒng)的功率平衡控制方法時(shí)，控制系統(tǒng)滯后現(xiàn)象明顯，，控制精度有待提高。針對傳統(tǒng)控制方法的不足，本文提出一種基于模糊神經(jīng)網(wǎng)絡(luò)的多電機(jī)功率平衡補(bǔ)償控制策略。模糊神經(jīng)網(wǎng)絡(luò)兼具模糊邏輯系統(tǒng)和人工神經(jīng)網(wǎng)絡(luò)的優(yōu)勢，本文詳細(xì)介紹了模糊邏輯系統(tǒng)的組成和神經(jīng)網(wǎng)絡(luò)的結(jié)構(gòu)分類及學(xué)習(xí)方式，重點(diǎn)研究了BP學(xué)習(xí)算法。針對傳統(tǒng)學(xué)習(xí)算法中學(xué)習(xí)速率難以設(shè)定的問題，采用學(xué)習(xí)速率自動調(diào)整的方法對其進(jìn)行改進(jìn)。本文還系統(tǒng)地給出了基于模糊神經(jīng)網(wǎng)絡(luò)的多電機(jī)功率平衡控制器的設(shè)計(jì)方法，針對隱含層節(jié)點(diǎn)數(shù)目難以確定的問題，采用試湊法來解決。設(shè)計(jì)了模糊神經(jīng)網(wǎng)絡(luò)控制器，實(shí)現(xiàn)了CST壓力PI控制器給定值的在線自適應(yīng)調(diào)整，有效地消除了控制系統(tǒng)的滯后現(xiàn)象，提高了控制精度。 本文采用MATLAB軟件對文中所述的控制方法進(jìn)行仿真驗(yàn)證，仿真結(jié)果表明，該方法具有響應(yīng)速度快，魯棒性強(qiáng)，功率平衡精度高等優(yōu)點(diǎn)，完全滿足帶式輸送機(jī)對多電機(jī)輸出功率平衡的要求。
[Abstract]:Belt conveyor is an efficient equipment for conveying bulk materials. It is widely used in coal industry and many other industrial fields because of its many advantages. With the development of belt conveyor, the drive mode is usually driven by multi-motor. The power balance of driving motor is an important problem to be solved in the multi-motor drive system. The fuzzy neural network is used to solve the power balance problem of multi-motor, which has the advantages of fast response speed and high control precision. In this paper, the causes of power imbalance in multi-machine drive system are analyzed in detail, and the principle of regulating the power balance of multi-motor is described in detail in combination with the working process of controllable start transmission controlled Start transmission (CSTs) device. According to the actual starting characteristics of belt conveyor, the ideal starting speed curve is designed. In this paper, the traditional multi-motor power balance control strategy is compared and analyzed, and the multi-motor power balance control system with master-slave control is simulated. The simulation results show that the hysteresis of the control system is obvious and the control precision needs to be improved when the traditional power balance control method is adopted. In view of the shortcomings of traditional control methods, this paper presents a power balance compensation control strategy for multi-motor based on fuzzy neural network. Fuzzy neural network has the advantages of both fuzzy logic system and artificial neural network. In this paper, the composition of fuzzy logic system and the structure classification and learning method of neural network are introduced in detail, and the BP learning algorithm is emphatically studied. In order to solve the problem that the learning rate is difficult to set in the traditional learning algorithm, the method of automatically adjusting the learning rate is adopted to improve it. The design method of multi-motor power balance controller based on fuzzy neural network is also given in this paper. Aiming at the problem that the number of hidden layer nodes is difficult to determine, the trial and error method is used to solve the problem. The fuzzy neural network controller is designed, and the on-line adaptive adjustment of the given value of the CST pressure Pi controller is realized, which effectively eliminates the lag phenomenon of the control system and improves the control precision. In this paper, MATLAB software is used to verify the proposed control method. The simulation results show that the method has the advantages of fast response speed, strong robustness and high precision of power balance. Fully meet the belt conveyor to the multi-motor output power balance requirements.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM301.2

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