本文選題：基礎環(huán)境模擬試驗　切入點：溫度控制　出處：《南京理工大學》2017年碩士論文　論文類型：學位論文

【摘要】：我國大型飛行器的設計和制造能力近年來得到了快速發(fā)展。為保證裝備設計的可靠性以及對各類氣候環(huán)境的適應性,在投入批量生產(chǎn)之前,必須對其進行環(huán)境適應性試驗。為節(jié)省人力、物力以及財力,有必要建設一個大規(guī)模的環(huán)境模擬試驗室,在試驗室中模擬再現(xiàn)飛行器可能遇到的氣候狀況。本文以某大型基礎環(huán)境模擬試驗室工程項目為背景,基于PLC并且結合WinCC設計了基礎環(huán)境模擬試驗室控制系統(tǒng),并以大環(huán)境室內(nèi)溫度控制部分為對象進行了研究。本文大型基礎環(huán)境模擬試驗系統(tǒng)由大環(huán)境室、小環(huán)境室以及冷卻水、載冷載熱、循環(huán)風等子系統(tǒng)組成,通過協(xié)調(diào)控制各個子系統(tǒng)的運行來實現(xiàn)高溫、低溫、降雨、結冰、降雪等各類氣候狀況的模擬。首先,根據(jù)控制系統(tǒng)總體結構分析了系統(tǒng)總體工藝流程,結合控制系統(tǒng)的技術指標和功能需求,設計了基礎環(huán)境模擬控制系統(tǒng)的總體方案;其次,以西門子S7-300系列PLC為各個子系統(tǒng)以及集中控制系統(tǒng)的主控制器,完成了溫度控制各個子系統(tǒng)的軟硬件設計;然后,采用機理法,分別建立了循環(huán)風系統(tǒng)中表冷器、閥門處混流部分以及大環(huán)境室溫度對象的數(shù)學模型,在MATLAB/Simulink中對單回路控制、串級控制以及串級模糊PID控制進行了仿真研究,并且采用了模糊PID串級控制對典型順序試驗溫度流程進行了仿真驗證,在Step7中實現(xiàn)了串級模糊PID控制算法。最后,采用WinCC設計實現(xiàn)了運行監(jiān)控系統(tǒng)軟件,用于控制系統(tǒng)的在線監(jiān)控。
[Abstract]:China's large aircraft design and manufacturing capabilities has been developing rapidly in recent years. In order to ensure the reliability of equipment design and the adaptability to the climate environment, before put into mass production, must be carried out environmental test on it. In order to save manpower, material resources and financial resources, it is necessary to build a large-scale environmental simulation test room in the laboratory to simulate aircraft may encounter climatic conditions. This paper takes a large project based environmental simulation laboratory as the background, based on PLC and combined with WinCC is designed based on environmental simulation laboratory control system, and the environment of the indoor temperature control part is studied as the object. By environment simulation test chamber this system for large infrastructure environment, small environment chamber and cooling water, the cooling load of heat, composed of circulating air system. Through the coordinated control of each subsystem operation High temperature, low temperature, rain, ice, snow and other climate simulation. Firstly, the overall structure of the control system according to the analysis of the overall process of the system, combined with the technical indicators and functional requirements of the control system, the design of the basic environment simulation of the overall scheme of the control system; secondly, based on the SIEMENS S7-300 series PLC for each subsystem and the main controller of centralized control system, designs the hardware and software of the temperature control of each subsystem; then, using the mechanism method, were established for cooler air circulating system, the mathematical model of the valve flow part and room temperature environment object, control of single loop in MATLAB/Simulink, cascade control and cascade fuzzy PID control is simulated, and the fuzzy PID cascade control is verified by simulation of typical sequential test temperature process, implemented in Step7 cascade mode The PID control algorithm is used. Finally, the software of the running monitoring system is implemented by WinCC design, which is used for the on-line monitoring of the control system.

【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP273

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本文編號：1598929