本文選題：鍋爐夾套 + PID自整定　； 參考：《北方民族大學(xué)》2016年碩士論文

【摘要】：鍋爐夾套溫度控制系統(tǒng)具有控制精度高、抗干擾能力強(qiáng)等優(yōu)點(diǎn),主要運(yùn)用在石油、化工等對(duì)液體加熱,其溫升曲線必須滿足一定的線性溫升和生產(chǎn)安全要求,由于許多實(shí)踐現(xiàn)場(chǎng)對(duì)溫度的影響是多方面的,溫度控制系統(tǒng)有其自身屬性,表現(xiàn)在擁有控制的滯后特性,控制對(duì)象的非線性等使得溫度的控制比較復(fù)雜,傳統(tǒng)的加熱裝置由于繼電器的應(yīng)用導(dǎo)致過(guò)大體積,故障率高,且系統(tǒng)的噪聲比較大,嚴(yán)重降低了正常的工業(yè)生產(chǎn)效率。采用高速的微處理器使得系統(tǒng)的軟件調(diào)試變得簡(jiǎn)單、系統(tǒng)的工作模式選擇變得豐富,能夠提高智能化,改善傳統(tǒng)繼電控制模式的性能。設(shè)計(jì)中詳細(xì)介紹了鍋爐溫度夾套溫度控制的工藝流程,對(duì)溫度控制的特性作了深入研究,通過(guò)對(duì)常規(guī)PID控制、串級(jí)PID控制策略控制進(jìn)行MATLAB仿真效果對(duì)比,PID自整定后通過(guò)臨界比例法及Z-N法獲得PID控制參數(shù),得出最適合鍋爐溫度控制的算法,滿足其在特定情況下的溫度升高曲線,提高了串級(jí)溫度控制系統(tǒng)的控制參數(shù)在現(xiàn)場(chǎng)下的適應(yīng)能力。在硬件選型上選用STM32作為CPU,確定了溫度及壓強(qiáng)變送器型號(hào)、執(zhí)行機(jī)構(gòu)型號(hào)等,對(duì)硬件連接情況進(jìn)行了測(cè)試。在人機(jī)對(duì)話功能上,采用STM32的UCOS-II操作系統(tǒng),建立可視化界面,實(shí)時(shí)查看采集溫度、設(shè)備狀況,并設(shè)置報(bào)警功能,操作系統(tǒng)使得系統(tǒng)智能化程度提高,控制更加方便。系統(tǒng)設(shè)計(jì)能夠滿足現(xiàn)場(chǎng)的溫度控制要求,性能特性優(yōu)良。
[Abstract]:The temperature control system of boiler jacket has the advantages of high control precision and strong anti-interference ability. It is mainly used in petroleum and chemical industry to heat liquid. Its temperature rise curve must meet certain linear temperature rise and production safety requirements. Because the influence of many practice sites on temperature is various, the temperature control system has its own properties, such as the hysteresis characteristic of control, the nonlinearity of control object, etc., which makes the temperature control more complicated. Because of the application of relay, the traditional heating device has the advantages of too large volume, high failure rate and high system noise, which seriously reduces the normal industrial production efficiency. The adoption of high speed microprocessor makes the software debugging of the system simple, and the choice of the working mode of the system becomes rich, which can improve the intelligence and improve the performance of the traditional relay control mode. In the design, the process of temperature control of boiler temperature jacket is introduced in detail, and the characteristics of temperature control are deeply studied. Through the conventional PID control, Comparison of MATLAB simulation results of cascade PID control strategy after pid self-tuning, the parameters of PID control are obtained by critical proportion method and Z-N method, and the most suitable algorithm for boiler temperature control is obtained, which satisfies the temperature rise curve of boiler under certain circumstances. The adaptability of the control parameters of the cascade temperature control system in the field is improved. In the selection of hardware, STM32 is selected as CPU, the temperature and pressure transmitter model, the type of actuator and so on are determined, and the hardware connection is tested. In the man-machine dialogue function, the STM32 UCOS-II operating system is adopted, the visual interface is established, the collection temperature, the equipment condition are viewed in real time, and the alarm function is set up. The operating system makes the system more intelligent and more convenient to control. The system design can meet the field temperature control requirements, and the performance of the system is excellent.
【學(xué)位授予單位】：北方民族大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TK223.7
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本文編號(hào)：1875551