本文選題：大流量調(diào)節(jié)閥 + 穩(wěn)壓控制　； 參考：《山東大學(xué)》2011年碩士論文

【摘要】：大流量氣壓、液壓調(diào)節(jié)閥在國民經(jīng)濟生產(chǎn)過程中有著廣泛的應(yīng)用,但是由于目前國內(nèi)制造業(yè)的現(xiàn)狀,對于眾企業(yè)大量進口高性能調(diào)節(jié)閥這一問題,一直難以解決,因此亟需對高性能調(diào)節(jié)閥及其先進控制技術(shù)進行深入研究。本文在全面分析國內(nèi)傳統(tǒng)調(diào)節(jié)閥和國外先進高性能調(diào)節(jié)閥的基礎(chǔ)之上,對大型調(diào)節(jié)閥穩(wěn)壓控制技術(shù)進行了重點研究,最終目的是開發(fā)適合鋼廠聯(lián)合循環(huán)發(fā)電工程所需要的高性能大流量調(diào)節(jié)閥。 首先,創(chuàng)建了大流量調(diào)節(jié)閥穩(wěn)壓實驗系統(tǒng)平臺。參考企業(yè)生產(chǎn)實際,針對鋼廠所確定的數(shù)據(jù),結(jié)合實驗室所建立的實驗系統(tǒng),了解實驗系統(tǒng)所用器件的型號、規(guī)格。在此基礎(chǔ)上,嘗試?yán)秒娨核欧到y(tǒng)驅(qū)動大流量調(diào)節(jié)閥閥芯的想法,以取代現(xiàn)在大型鋼廠使用的氣體壓力調(diào)節(jié)系統(tǒng),建立了大流量調(diào)節(jié)閥混合煤氣穩(wěn)壓系統(tǒng)的實驗平臺,并對實驗參數(shù)進行了確定,進行了初步的元器件選型,對以后的實際實驗過程具有指導(dǎo)意義。 其次,建立了大流量調(diào)節(jié)閥混合煤氣穩(wěn)壓系統(tǒng)的數(shù)學(xué)模型。利用液壓缸節(jié)流口處流量連續(xù)性方程、液壓缸和負(fù)載的力平衡方程、閥芯受力不平衡方程、電液伺服閥傳遞函數(shù)等方程式確定閥控液壓缸系統(tǒng)的動特性,并根據(jù)大流量調(diào)節(jié)閥混合煤氣穩(wěn)壓系統(tǒng)方程式建立大流量調(diào)節(jié)閥混合煤氣穩(wěn)壓系統(tǒng)傳遞函數(shù),由此建立系統(tǒng)的數(shù)學(xué)模型方塊圖。 再次,在系統(tǒng)設(shè)計及數(shù)學(xué)模型的基礎(chǔ)上,對大流量調(diào)節(jié)閥混合煤氣穩(wěn)壓系統(tǒng)進行了MATLAB/Simulink動態(tài)響應(yīng)仿真分析,包括常規(guī)PID控制系統(tǒng)仿真和模糊PID控制系統(tǒng)仿真。系統(tǒng)仿真過程中,結(jié)合實際生產(chǎn)過程中大型氣體壓力調(diào)節(jié)閥存在的響應(yīng)慢和響應(yīng)滯后問題,對常規(guī)PID控制仿真結(jié)果和模糊PID控制仿真結(jié)果進行了對比,針對兩種仿真結(jié)果各自的不足之處,得出兩種仿真控制的優(yōu)缺點。將模糊PID控制系統(tǒng)引入本實驗系統(tǒng)的嘗試對以后利用西門子PLC參數(shù)自整定功能進行控制具有指導(dǎo)意義。 最后,在MATLAB/Simulink仿真的基礎(chǔ)上,利用ABB Industrial IT AC800F控制軟件對整個實驗系統(tǒng)進行仿真,以驗證所建實驗系統(tǒng)模型的準(zhǔn)確性。通過進行常規(guī)PID控制仿真分析可知,常規(guī)PID控制基本能達到實驗系統(tǒng)要求。
[Abstract]:Large flow pressure and hydraulic control valves are widely used in the process of national economic production. However, due to the present situation of domestic manufacturing, it is difficult to solve the problem of importing a large number of high performance control valves from many enterprises. Therefore, it is urgent to study the high performance control valve and its advanced control technology. Based on the comprehensive analysis of domestic traditional control valves and foreign advanced high performance control valves, this paper focuses on the study of the pressure stabilizing control technology of large regulating valves. The final aim is to develop high performance and large flow regulating valve suitable for combined cycle power generation project of steel plant. First of all, a large flow regulating valve pressure control system platform is established. Referring to the production practice of the enterprise, according to the data determined by the steel factory, combined with the experimental system established in the laboratory, the model and specification of the device used in the experimental system are understood. On this basis, the paper tries to use the idea of electro-hydraulic servo system to drive the valve core of large flow regulating valve, in order to replace the gas pressure regulating system used in large steel plant, and establish the experimental platform of the mixed gas pressure stabilizing system of large flow regulating valve. The parameters of the experiment are determined and the selection of the components is carried out, which is of great significance to the practical experiment process in the future. Secondly, the mathematical model of large flow regulating valve mixed gas stabilizer system is established. The dynamic characteristics of the valve controlled hydraulic cylinder system are determined by using the flow continuity equation at the throttle of the hydraulic cylinder, the force balance equation between the hydraulic cylinder and the load, the unbalance force equation of the valve core and the transfer function of the electro-hydraulic servo valve. According to the equation of the large flow regulating valve mixture gas stabilizing system, the transfer function of the large flow regulating valve mixture gas stabilizing system is established, and the mathematical model block diagram of the system is established. Thirdly, on the basis of the system design and mathematical model, the MATLAB/Simulink dynamic response simulation analysis of the large flow regulating valve mixed gas stabilizing system is carried out, including the simulation of the conventional PID control system and the fuzzy PID control system simulation. In the course of system simulation, the simulation results of conventional PID control and fuzzy PID control are compared with the problems of slow response and delayed response of large gas pressure regulator in actual production process. According to the shortcomings of the two simulation results, the advantages and disadvantages of the two kinds of simulation control are obtained. The attempt to introduce fuzzy PID control system into this experimental system is of guiding significance for the control of Siemens PLC parameter self-tuning function in the future. Finally, on the basis of MATLAB/Simulink simulation, ABB Industrial IT AC800F control software is used to simulate the whole experimental system to verify the accuracy of the established experimental system model. Through the simulation analysis of conventional PID control, it can be seen that the conventional PID control can basically meet the requirements of the experimental system.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH134

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