本文選題：開卷機 + 間接張力控制　； 參考：《昆明理工大學》2014年碩士論文

【摘要】：鉛片開卷機是鉛陰極制備機組中的重要設(shè)備,開卷張力的控制直接影響到陰極板生產(chǎn)的質(zhì)量和效率。本文根據(jù)實際工況,研究對象是新型鉛片開卷機,將電液比例控制技術(shù)、間接張力控制技術(shù)運用其中,并對相關(guān)技術(shù)原理進行深入研究。 首先,本文總結(jié)了國內(nèi)外電液比例技術(shù)和張力控制技術(shù),并概述電液比例控制系統(tǒng)的特點和應(yīng)用。其中,重點論述了張力控制系統(tǒng)的應(yīng)用情況及國內(nèi)外電液比例張力控制的發(fā)展現(xiàn)狀。 其次,本文在分析和研究張力產(chǎn)生、控制原理和工作過程中,發(fā)現(xiàn)了影響鉛片開卷機張力控制的主要因素,進行了浮動張力輥受力分析,提出了慣性力矩補償、卷徑計算與修正的方法,從而提高了張力控制精度。建立電液比例換向閥對液壓馬達的速度控制系統(tǒng)和電液比例溢流閥對液壓馬達的張力控制系統(tǒng),通過對整個鉛片開卷過程的分析,分別設(shè)計了基于恒線速度、恒張力的電液比例張力控制系統(tǒng)。 再次,本文對開卷機主要采用分段建模的方式,利用各液壓元件的數(shù)學模型,分別建立了電液比例速度、力矩、力控制系統(tǒng)。然后,利用Matlab軟件分別對各工作段進行仿真研究。由于開卷機的速度和張力存在耦合性,所以通過聯(lián)系兩者之間關(guān)系,實現(xiàn)建立鉛片開卷機生產(chǎn)線系統(tǒng)數(shù)學模型的目標。 最后,鑒于鉛片開卷機電液比例張力控制系統(tǒng)參數(shù)存在的時變、耦合和多干擾等特點,本文采用基于指數(shù)趨近率的滑模變結(jié)構(gòu)控制策略(SMC)。并通過Matlab/Simulink仿真工具搭建電液比例速度、力矩和力控制模型,進行了仿真分析。在鉛片開卷機電液比例張力控制中,將PID用于張力控制,系統(tǒng)存在超調(diào)且不穩(wěn)定,響應(yīng)速度慢,控制性能較差。相反,采用SMC控制,系統(tǒng)能具有較強適應(yīng)參數(shù)時變干擾的能力和魯棒性,并且控制性能明顯優(yōu)于PID控制。 此外,本文為了檢測開卷機液壓系統(tǒng)的電液換向閥性能是否滿足實際工況,利用本實驗室的電液伺服臺對其性能指標進行測試,如：空載流量特性、壓力特性、壓力—流量特性,幅頻和相頻等靜、動態(tài)特性。通過對各曲線的分析,確認出所選的電液換向閥滿足實際開卷機液壓系統(tǒng)要求,從而為電液比例張力控制系統(tǒng)的建立奠定了基礎(chǔ)。
[Abstract]:Lead sheet uncoiling machine is an important equipment in lead cathode preparation unit. The control of uncoiling tension directly affects the quality and efficiency of cathode plate production. According to the actual working conditions, the research object is a new type of lead sheet uncoiling machine. The electro-hydraulic proportional control technology and indirect tension control technology are applied in the research. This paper summarizes the electro-hydraulic proportional technology and tension control technology at home and abroad, and summarizes the characteristics and application of electro-hydraulic proportional control system. Among them, the application of tension control system and the development status of electro-hydraulic proportional tension control at home and abroad are discussed. Secondly, this paper analyzes and studies the generation, control principle and working process of tension. The main factors affecting tension control of lead sheet uncoiler are found. The force analysis of floating tension roller is carried out, and the methods of inertia torque compensation, calculation and correction of winding diameter are put forward, so as to improve the precision of tension control. The speed control system of electro-hydraulic proportional directional valve to hydraulic motor and the tension control system of electro-hydraulic proportional relief valve to hydraulic motor are established. Through the analysis of the whole uncoiling process of lead sheet, the constant linear velocity is designed respectively. Thirdly, the paper mainly adopts the method of subsection modeling to unwind the coiler, and establishes the electro-hydraulic proportional velocity, torque and force control system by using the mathematical model of each hydraulic element. Then, each working section is simulated by Matlab software. Because of the coupling between the speed and tension of the uncoiler, the goal of establishing the mathematical model of the production line of lead sheet uncoiler is realized by connecting the relationship between the two. Finally, In view of the time-varying, coupling and multi-interference characteristics of the electro-hydraulic proportional tension control system for lead sheet unwinding, a sliding mode variable structure control strategy based on exponential convergence rate is adopted in this paper. The electro-hydraulic proportional velocity, torque and force control model are built by Matlab / Simulink simulation tool, and the simulation analysis is carried out. In the proportional tension control of lead sheet uncoiling electromechanical fluid, pid is used in tension control. The system has overshoot and instability, slow response speed and poor control performance. On the contrary, with SMC control, the system has the ability and robustness to adapt to the time-varying disturbance of parameters, and the control performance is obviously better than that of pid control. In order to test whether the performance of electro-hydraulic reversing valve in hydraulic system of uncoiler meets the actual working condition, this paper uses the electro-hydraulic servo platform in our laboratory to test its performance index, such as no-load flow characteristic, pressure-flow characteristic, etc. Amplitude frequency and phase frequency are static and dynamic characteristics. Through the analysis of the curves, it is confirmed that the selected electro-hydraulic directional valve meets the requirements of the actual hydraulic system of the unwinding machine, thus laying a foundation for the establishment of the electro-hydraulic proportional tension control system.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TH137

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本文編號：2003190