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System No. U0002-2409202115083900
Title (in Chinese) 以支持向量回歸分析(SVR)在CNC刀具切削磨耗與壽命之研究
Title (in English) Study on Cutting Wear of CNC Tools by Support Vector Regression
Other Title
Institution 淡江大學
Department (in Chinese) 機械與機電工程學系碩士班
Department (in English) Department of Mechanical and Electro-Mechanical Engineering
Other Division
Other Division Name
Other Department/Institution
Academic Year 109
Semester 2
PublicationYear 110
Author's name (in Chinese) 吳政餘
Author's name(in English) Jheng-Yu Wu
Student ID 605350122
Degree 碩士
Language Traditional Chinese
Other Language
Date of Oral Defense 2021-07-19
Pagination 63page
Committee Member advisor - 楊智旭
co-chair - 張士行
co-chair - 吳乾埼
Keyword (inChinese) 支持向量機器(SVM)
支持向量回歸(SVR)
CNC車削
田口法
倒傳遞神經網路(BPN)
Keyword (in English) Support Vector Machine (SVM)
Support Vector Regression (SVR)
CNC Turning
Taguchi Method
Backward Propagation Network(BPN)
Other Keywords
Subject
Abstract (in Chinese)
在CNC車削加工中,採購刀具的多寡一直是所有廠商所煩惱的問題,若採購量多,雖單價降低,但刀具多也增加資金成本、倉儲管理的困難,若採購量少,則單價高而不划算,所以欲找到最佳採購量,就必須仔細計算每一片刀具的壽命。然而刀具磨損的快慢牽涉到許多的原因,如切削速度、進刀量、切削深度等,這些參數的組合都會影響需要更換刀具的時間,若進行全因子實驗,則需要耗費大量的時間及成本。
因此,本研究使用支持向量回歸(SVR)預測刀具壽命,利用其建模樣本少的特性,再以田口法中的直交表減少實驗次數,並進行實驗、建模,在精密加工及細加工條件下,以訓練之模型預測需要更換刀具的時間,結果確實可精準預測實際需更換刀具之時間,減少傳統人力檢驗、物料管理、倉儲所花費之成本,提高企業獲利。
Abstract (in English)
In CNC turning processing, the number of purchased tools has always been a problem for all manufacturers. If the purchase quantity is large, although the unit price will be reduced, the large number of tools will increase the capital cost and the difficulty of warehouse management. If the purchase quantity is small, the unit price is high and not cost-effective. Therefore, to find the best purchase quantity, the life of each tool must be calculated carefully.
However, the speed of tool wear involves many factors, such as cutting speed, feed rate, cutting depth, etc. The combination of these parameters will affect the time required to replace the tool. If a full factor experiment is performed, a lot of time and cost will be spent.
Therefore, this research uses support vector regression (SVR) to predict tool life.The characteristics of SVR is less modeling samples, and then uses the orthogonal table in Taguchi method to reduce parameter combinations, and conducts experiments and modeling. Under the conditions of precision machining and fine machining, the trained model is used to predict the time to change the tool. The result can accurately predict the actual time to change the tool, reduce the cost of traditional manpower inspection, material management, and warehousing.
Other Abstract
Table of Content (with Page Number)
第一章	緒論……………………………………………………………..1
1.1研究背景………………………………………………………..1
1.2文獻回顧………………………………………………………..2
1.3動機與目的……………………………………………………..3
第二章	基礎理論………………………………………………………..5
2.1支持向量機器…………………………………………………..5
	2.1.1 SVM數學式子…………………………………………...6
	2.1.2 二次回歸(QP)求解……………………………...….....10
	2.1.3 核函式…………………………………………………13
	2.1.4 拉格朗日對偶問題……………………………………24
2.2 支持向量回歸…...……………………………………………30
2.3 倒傳遞神經網路…………………………………………...…33
	2.3.1 BPN基本架構……………………………………….…34
		2.3.2 BPN演算法…………………………………………….35
2.4 田口法直交表………………………………………………...38
第三章	實驗組成架構…………………………………………………40
3.1訓練數據的取得………………………………………………40
3.2支持向量回歸的架構…………………………………………42
	3.2.1 輸入數據之取得………………………………………42
	3.2.2 模型參數設定…………………………………………44
第四章	實驗結果與未來規劃…………………………………………47
4.1實驗結果……………………………………………………….47
	4.1.1全自動優化參數SVR……...……………………………47
	4.1.2高斯核函數、自動優化參數SVR……...………………49
	4.1.3多項式核函數、自動優化參數SVR…….……………..51
	4.1.4倒傳遞神經網路與高斯核函數SVR比較……..………53
	4.1.5高斯核函數SVR全因子預測…………….…………….55
	4.1.6以磨耗比計算刀具壽命………………………………....56
4.2結論…..………………………………………………………...57
參考文獻………………………………………………………………..60
References
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