本文選題：超速離心機(jī) + 故障診斷��； 參考：《湖南大學(xué)》2012年碩士論文

【摘要】：離心機(jī)是依靠轉(zhuǎn)子高速旋轉(zhuǎn)產(chǎn)生的離心力進(jìn)行分離、濃縮、提純、分析等操作的儀器。一般將最高轉(zhuǎn)速不低于30000轉(zhuǎn)/分的離心機(jī)稱為超速離心機(jī)。超速離心機(jī)目前已經(jīng)廣泛應(yīng)用于醫(yī)療、化工、食品、制藥和石油等領(lǐng)域，，是我國重點(diǎn)研究的科學(xué)儀器之一。 超速離心機(jī)在運(yùn)行過程中可能產(chǎn)生故障，這些故障因為發(fā)生在高速旋轉(zhuǎn)的過程中，會造成極其嚴(yán)重的經(jīng)濟(jì)損失和人身危險。因此研究一種超速離心機(jī)的故障診斷專家系統(tǒng)，針對主要故障模式找出可能的原因是非常必要的。專家系統(tǒng)屬于人工智能范疇，是具有包含某一領(lǐng)域大量的專家知識和經(jīng)驗，模擬人類專家的決策過程和思維方式的計算機(jī)程序。一個好的專家系統(tǒng)具有設(shè)備故障診斷速度快、準(zhǔn)確率高等優(yōu)點(diǎn)。 本文首先對超速離心機(jī)和故障診斷的發(fā)展進(jìn)行了闡述，并且詳細(xì)介紹了超速離心機(jī)的工作原理、結(jié)構(gòu)組成和參數(shù)要求等。為了建立完善的超速離心機(jī)故障診斷專家系統(tǒng)的知識庫，本文對超速離心機(jī)在工作過程中可能出現(xiàn)的故障進(jìn)行了總結(jié)，并采用多種傳感器及其信號采集電路對信號參數(shù)進(jìn)行提取，設(shè)計了合理的傳輸協(xié)議，使得系統(tǒng)能夠?qū)崟r的對測量信號進(jìn)行檢測，提供故障診斷的依據(jù)。本文采用產(chǎn)生式知識表示法和框架式知識表示法相結(jié)合的方法，對知識庫里的專家知識進(jìn)行表示，并結(jié)合Access2003對知識庫進(jìn)行分類構(gòu)建，建立了完善的知識管理模塊，并且對知識庫的自學(xué)習(xí)功能進(jìn)行了討論。系統(tǒng)采用貝葉斯網(wǎng)絡(luò)推理方法結(jié)合正向推理策略設(shè)計了系統(tǒng)的推理機(jī)制，能夠推理出故障發(fā)生的原因及其概率，并采用MSBNx(Microsoft Bayesian Network Editor)對貝葉斯網(wǎng)絡(luò)推理方法進(jìn)行仿真驗證，取得了預(yù)期的功效。MSBNx是微軟公司出品的貝葉斯網(wǎng)絡(luò)編輯器，專門用于貝葉斯網(wǎng)絡(luò)的計算和仿真。系統(tǒng)采用預(yù)制文本法和追蹤解釋法相結(jié)合的方式建立了解釋機(jī)制，能夠?qū)收系奶幚磉^程進(jìn)行較為完善的解釋。 論文最后具體分析了超速離心機(jī)故障診斷專家系統(tǒng)的軟件結(jié)構(gòu)，采用VC++2005作為軟件開發(fā)工具，完成了包括狀態(tài)檢測、故障診斷和知識管理模塊在內(nèi)的軟件設(shè)計。
[Abstract]:Centrifuge is an instrument for separation, concentration, purification, analysis and so on. Generally, the maximum speed of not less than 30000 rpm / min centrifuge is called an overspeed centrifuge. Ultra-speed centrifuge has been widely used in medical, chemical, food, pharmaceutical and petroleum fields. It is one of the most important scientific instruments in China. In the process of running, the ultra speed centrifuge may have faults, which will cause extremely serious economic loss and personal danger because of the high speed rotating process. Therefore, it is necessary to study an expert system for fault diagnosis of ultracentrifuge and to find out the possible causes for the main fault modes. Expert system belongs to the category of artificial intelligence. It is a computer program that contains a lot of expert knowledge and experience in a certain field and simulates the decision-making process and thinking mode of human experts. A good expert system has the advantages of fast equipment fault diagnosis and high accuracy. In this paper, the development of ultra speed centrifuge and fault diagnosis are described, and the working principle, structure composition and parameter requirement of ultra speed centrifuge are introduced in detail. In order to establish the knowledge base of fault diagnosis expert system for ultracentrifuge, this paper summarizes the possible faults in the working process of ultracentrifuge. The signal parameters are extracted by a variety of sensors and their signal acquisition circuits, and a reasonable transmission protocol is designed, which enables the system to detect the measured signals in real time and provide the basis for fault diagnosis. In this paper, the expert knowledge in the knowledge base is represented by the combination of the production knowledge representation method and the frame knowledge representation method, and the knowledge base is classified and constructed with Access2003, and a perfect knowledge management module is established. The self-learning function of knowledge base is also discussed. The system uses Bayesian network reasoning method and forward reasoning strategy to design the inference mechanism of the system. It can infer the reason and probability of the fault, and use MSBNx(Microsoft Bayesian Network Editor) to simulate the Bayesian network reasoning method. MSBNx is a Bayesian network editor produced by Microsoft, which is specially used in the calculation and simulation of Bayesian network. The system uses the prefabricated text method and the tracing interpretation method to establish the interpretation mechanism, which can explain the fault handling process perfectly. Finally, the software structure of fault diagnosis expert system for ultracentrifuge is analyzed in detail. VC 2005 is used as the software development tool, and the software design including status detection, fault diagnosis and knowledge management module is completed.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH165.3;TP182

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本文編號：1964040