本文選題：相關(guān)向量機 + 小樣本��； 參考：《西安工程大學(xué)》2016年碩士論文

【摘要】：目前常用的一些基本的故障診斷、故障預(yù)測方法都將大樣本數(shù)據(jù)作為基礎(chǔ),但在實際問題中常常能得到的故障數(shù)據(jù)都屬于小樣本類型.傳統(tǒng)的故障診斷、故障預(yù)測方法已不適于用來解決小樣本類型的故障問題.相關(guān)向量機(Relevance Vector Machine,簡稱RVM)是新提出的以支持向量機(Support Vector Machine,簡稱SVM)為基礎(chǔ)的模型,該模型更適應(yīng)于解決小樣本問題.已經(jīng)被應(yīng)用于語音及圖像處理、醫(yī)學(xué)診斷、模式分類等很多領(lǐng)域.本文針對RVM在小樣本故障診斷、故障預(yù)測中的應(yīng)用問題展開研究,主要包含以下方面:(1)分析故障診斷、故障預(yù)測的研究現(xiàn)狀;(2)RVM理論基礎(chǔ)及其在故障診斷、故障預(yù)測中的可行性;(3)針對RVM中核函數(shù)選擇的盲目性及核函數(shù)中相關(guān)參數(shù)對RVM性能的影響,通過組合高斯核函數(shù)和柯西核函數(shù)構(gòu)造混合核函數(shù),利用布谷鳥搜索算法(Cuckoo Search Algorithm,簡稱CS)對混合核函數(shù)的參數(shù)進行優(yōu)化選擇,建立基于布谷鳥算法的混合核函數(shù)相關(guān)向量機模型(CS-RVM),并通過仿真測試驗證模型的有效性;(4)將CS-RVM應(yīng)用到航空發(fā)動機的氣路診斷和柴油機的油路診斷中,通過與RVM和基于差分進化(Differential Evolution,簡稱DE)的混合核函數(shù)相關(guān)向量機模型(DE-RVM)比較,充分說明該方法在小樣本故障診斷、故障預(yù)測中的可行性.
[Abstract]:At present, some basic fault diagnosis methods are based on large sample data, but the fault data often obtained in practical problems belong to small sample types. Traditional fault diagnosis and fault prediction methods are not suitable to solve the problem of small sample types of faults. Correlation vector machine (RVM) is a new model based on support vector machine support Vector Machine (SVM), which is more suitable for solving small sample problem. It has been used in many fields, such as speech and image processing, medical diagnosis, pattern classification and so on. In this paper, the application of RVM in small sample fault diagnosis and fault prediction is studied, which mainly includes the following aspects: 1) Analysis of fault diagnosis, present situation of research on fault prediction and its theoretical basis and its application in fault diagnosis. According to the blindness of kernel function selection in RVM and the influence of relevant parameters in kernel function on the performance of RVM, the hybrid kernel function is constructed by combining Gao Si kernel function and Cauchy kernel function. Cuckoo search algorithm (CSA) is used to optimize the selection of parameters of hybrid kernel function. A hybrid kernel function correlation vector machine model based on cuckoo algorithm is established, and the validity of the model is verified by simulation tests. The CS-RVM is applied to the gas path diagnosis of aero-engine and the oil path diagnosis of diesel engine. Compared with RVM and DE-RVM-based hybrid kernel function correlation vector machine model based on differential evolution (DEV), the feasibility of this method in small sample fault diagnosis and fault prediction is fully demonstrated.
【學(xué)位授予單位】：西安工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：V263.6;TP18

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本文編號：2000454