【摘要】：實(shí)際工業(yè)生產(chǎn)過(guò)程中常會(huì)出現(xiàn)含有時(shí)滯環(huán)節(jié)的多變量耦合系統(tǒng),這些大滯后系統(tǒng)給工業(yè)生產(chǎn)帶來(lái)不少的麻煩,難以達(dá)到理想的控制效果,甚至?xí)䦷?lái)安全方面的問(wèn)題。隨著工業(yè)控制要求的提高,以及因多輸入和多輸出變量而形成的復(fù)雜系統(tǒng),對(duì)控制方法提出了更高的要求。所以,針對(duì)復(fù)雜控制對(duì)象提出有效實(shí)用且穩(wěn)定的控制方法是工業(yè)控制領(lǐng)域研究的熱點(diǎn)之一。論文根據(jù)實(shí)際項(xiàng)目催化劑造粒生產(chǎn)的工藝流程和回轉(zhuǎn)爐的焙燒原理,設(shè)計(jì)出基于S7-300PLC的回轉(zhuǎn)爐控制系統(tǒng),實(shí)現(xiàn)了整個(gè)生產(chǎn)過(guò)程的自動(dòng)化控制,組態(tài)人機(jī)界面,實(shí)現(xiàn)了整個(gè)過(guò)程的可視化控制。采用傳統(tǒng)的PID控制方法,實(shí)現(xiàn)回轉(zhuǎn)爐內(nèi)部溫度、壓力的自動(dòng)控制,達(dá)到了目標(biāo)控制效果。依據(jù)實(shí)際項(xiàng)目經(jīng)驗(yàn),分析了回轉(zhuǎn)爐系統(tǒng)溫度的滯后特性。對(duì)常見(jiàn)的控制算法PID、Smith預(yù)估控制進(jìn)行分析和推導(dǎo),并對(duì)Smith預(yù)估控制進(jìn)行改進(jìn)。將模糊控制分別與PID、內(nèi)模控制結(jié)合,推導(dǎo)相關(guān)理論方程,設(shè)計(jì)出改進(jìn)的Fuzzy-PID控制算法。對(duì)控制算法進(jìn)行相應(yīng)控制器的設(shè)計(jì),通過(guò)MATLAB分別對(duì)PID控制器,Fuzzy-PID控制器和改進(jìn)的Fuzzy-PID控制器進(jìn)行仿真,獲取單位階躍下的響應(yīng)輸出曲線。仿真結(jié)果表明,改進(jìn)的Fuzzy-PID控制算法在系統(tǒng)的動(dòng)態(tài)和靜態(tài)特性方面都獲得了滿意的控制效果。
[Abstract]:In the process of industrial production, there are often multivariable coupling systems with time delay, which bring many troubles to industrial production, and it is difficult to achieve ideal control effect, and even bring safety problems. With the improvement of industrial control requirements and complex systems formed by multi-input and multi-output variables, higher requirements for control methods are put forward. Therefore, it is one of the hotspots in the field of industrial control to propose effective and stable control methods for complex control objects. According to the process flow of catalyst granulation and the roasting principle of rotary furnace, a rotary converter control system based on S7-300PLC is designed in this paper, which realizes the automatic control of the whole production process and the configuration of man-machine interface. The visual control of the whole process is realized. The traditional PID control method is used to realize the automatic control of temperature and pressure in the converter, and the target control effect is achieved. Based on actual project experience, the hysteresis characteristics of converter system temperature are analyzed. This paper analyzes and deduces the common control algorithm, and improves the Smith predictive control. Combining fuzzy control with Fuzzy-PID and internal model control, the related theoretical equations are derived, and an improved Fuzzy-PID control algorithm is designed. The corresponding controller is designed for the control algorithm. The PID controller Fuzzy-PID controller and the improved Fuzzy-PID controller are simulated by MATLAB to obtain the response output curve of unit step. Simulation results show that the improved Fuzzy-PID control algorithm has achieved satisfactory control results in both dynamic and static characteristics of the system.
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TP273

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本文編號(hào)：2177154