本文選題：溫度場 + 有限元分析��； 參考：《西安理工大學》2017年碩士論文

【摘要】：近年來,我國冶金行業(yè)飛躍式的發(fā)展,國家對能源利用及環(huán)境保護有了更高的要求。工業(yè)燒結爐在材料加工中起著至關重要的作用,人們致力于研究高性能的工業(yè)燒結爐控制系統(tǒng),而影響工業(yè)燒結爐性能的因素即燒結爐溫度場設計及爐溫的控制兩方面。為此,本課題主要從三方面做進一步論述。首先,本文以溫度場研究入手。介紹了以石墨為加熱體的燒結爐的結構與加熱過程熱量傳遞的方式,運用有限元分析的思想,使用ANSYS對加熱爐建立三維物理模型,進行溫度場仿真,通過仿真結果分析加熱體厚度、電阻率、加熱功率等參數(shù)對加熱爐加熱過程中溫度變化的影響,得出受熱工件溫度隨時間變化的曲線,模擬出溫度場分布云圖,對工業(yè)加熱過程溫度場的設計制造起到了很好的指導性作用。其次,設計出了基于可編程控制器的工業(yè)燒結爐爐溫控制系統(tǒng)。由于溫度控制具有滯后性,本部分采用PID參數(shù)自整定的控制策略作為核心算法的溫度控制系統(tǒng)。該控制系統(tǒng)分下位機和上位機兩部分,下位機選用西門子可編程控制器作為主控制器,對系統(tǒng)軟件進行硬件組態(tài)及控制算法的設計,以二相電力調整器作為功率調節(jié)單元,將溫度誤差控制在±1℃之內;上位機利用組態(tài)王開發(fā)環(huán)境,完成了人機交互界面的設計,實現(xiàn)了狀態(tài)監(jiān)控和控制操作,以及溫控工藝曲線設定功能,以工控一體機作為顯示,完成了視頻監(jiān)控及數(shù)據(jù)記錄,整個系統(tǒng)運行可靠,達到了控制的性能指標。最后,為了提高控制系統(tǒng)的性價比,對溫度控制進行了嵌入式的設計研究。采用ARM Cortex - M3架構的微控制器LPC1788作為主控單元,完成了軟硬件的設計,基于嵌入式μC/OS-Ⅱ系統(tǒng)的任務調度機制,完成了嵌入式開發(fā)環(huán)境的構建及底層驅動編寫。配套使用LCD液晶觸摸屏作為人機交互界面,成功移植μC/GUI圖形用戶開發(fā)軟件,完成豐富的人機交互功能。設計了基于嵌入式的燒結爐溫度控制系統(tǒng),達到了預期效果。
[Abstract]:In recent years, with the rapid development of metallurgical industry in China, the country has higher requirements for energy utilization and environmental protection. Industrial sintering furnace plays an important role in material processing. People devote themselves to the study of high performance industrial sintering furnace control system. The factors that affect the performance of industrial sintering furnace are the design of sintering furnace temperature field and the control of furnace temperature. To this end, this subject mainly from three aspects to do further elaboration. First of all, this paper starts with the study of temperature field. This paper introduces the structure of sintering furnace with graphite as heating body and the way of heat transfer during heating process. Using the idea of finite element analysis, the three-dimensional physical model of reheating furnace is established by using ANSYS, and the temperature field is simulated. By analyzing the influence of heating body thickness, resistivity, heating power and other parameters on the temperature change of heating furnace, the curve of temperature change with time of heated workpiece is obtained, and the distribution cloud diagram of temperature field is simulated. It plays a good guiding role in the design and manufacture of temperature field in industrial heating process. Secondly, the temperature control system of industrial sintering furnace based on programmable controller is designed. Because of the lag of temperature control, the temperature control system based on PID parameter self-tuning control strategy is used as the core algorithm. The control system is divided into two parts: lower computer and upper computer. Siemens programmable controller is chosen as the main controller. The hardware configuration and control algorithm of the system software are designed, and the two-phase power regulator is used as the power regulating unit. The temperature error is controlled within 鹵1 鈩，

本文編號：1883252