基于變頻調(diào)速的水平連鑄機(jī)拉坯輥速度控制系統(tǒng)Frequency Inverter Based Drawing RollerS peedC ontrolSy stem ofHorizontal Continuous Casting MachineA 偉劉沖旅巴(南 華 大 學(xué)電氣工程學(xué)院,衡陽(yáng)421001)摘要拉坯輥速度控制是水平連鑄工藝的關(guān)鍵技術(shù)之一,采用變頻器實(shí)現(xiàn)水平連鑄機(jī)拉坯輥速度程序控制,由信號(hào)發(fā)生裝置給變頻器提供程控信號(hào)。現(xiàn)場(chǎng)應(yīng)用表明該控制系統(tǒng)速度響應(yīng)快,控制精度高,滿足了水平連鑄生產(chǎn)的需要。關(guān)鍵詞水平連鑄拉坯輥速度程序控制變頻器Absh'act Speedc ontorlof dr awingor leris on eo fth ek eyte chnologiesfo rho rizontalco ntinuousca stingm achine.Fo rth ispu rpose,fr equencyco nverterisad optedfo rdr awingor lersp eedp rogrammablec ontorlof ho rizontalco ntinuousca stingm achine,th ep rogrammableco ntorlsi gnalto fr equencyc onverteris provided場(chǎng)a signal generator. The results of application show that the response of system is rapid and the control accuracy is high enough to meet thedemand of production of horizontal continuous casting.Keywords Horizontalco ntinuousc asting Drawingor ler Speedp rogrammablec ontrol Ferquencyin verter 隨著 現(xiàn) 代 化工業(yè)生產(chǎn)對(duì)鋼材需求量的日益增加,連鑄生產(chǎn)能力已經(jīng)成為衡量一個(gè)國(guó)家冶金工業(yè)發(fā)展水平的重要指標(biāo)之一。近十幾年來,水平連鑄由于具有投資少、鑄坯直、見效快等多方面的優(yōu)點(diǎn),國(guó)內(nèi)許多鋼鐵企業(yè)利用水平連鑄機(jī)來澆鑄特種合金鋼,發(fā)揮了其獨(dú)特的優(yōu)勢(shì)并取得了較好的經(jīng)濟(jì)效益〔1,2)0采用 水 平 連鑄機(jī)澆鑄特種合金鋼時(shí),由于拉坯機(jī)是水平連鑄系統(tǒng)中的關(guān)鍵設(shè)備之一,拉坯機(jī)及其控制性能的好壞直接影響著連鑄坯的質(zhì)量,因此,連鑄的拉坯技術(shù)便成為整個(gè)水平連鑄技術(shù)的核心。由于鋼的冶煉過程是在高溫下進(jìn)行的,鋼水溫度的變化又容易影響鑄坯的質(zhì)量和成材率,因此,如何能在高溫環(huán)境下控制好與鑄坯速度相關(guān)的參數(shù)(拉、推程量,中停時(shí)間和拉坯頻率等)對(duì)于確保連鑄作業(yè)的進(jìn)一步高效化,延長(zhǎng)系統(tǒng)的連續(xù)作業(yè)時(shí)間十分關(guān)鍵。因此,拉坯輥速度控制技術(shù)是連鑄生產(chǎn)過程控制領(lǐng)域中的關(guān)鍵技術(shù)之- [31
標(biāo)簽: 變頻調(diào)速 水平連鑄機(jī) 速度控制
上傳時(shí)間: 2013-10-12
上傳用戶:gxy670166755
從LVS的通用體系結(jié)構(gòu)入手,分析了IPVS軟件的工作原理,討論了三種IP負(fù)載均衡技術(shù);在分析網(wǎng)絡(luò)地址轉(zhuǎn)換方法(VS/NAT)的缺點(diǎn)和網(wǎng)絡(luò)服務(wù)的非對(duì)稱性的基礎(chǔ)上,給出了通過IP隧道實(shí)現(xiàn)虛擬服務(wù)器的方法VS/TUN,和通過直接路由實(shí)現(xiàn)虛擬服務(wù)器的方法VS/DR,極大地提高了系統(tǒng)的可伸縮性。該技術(shù)為建立和維護(hù)大型網(wǎng)絡(luò)服務(wù)具有實(shí)際應(yīng)用價(jià)值和指導(dǎo)意義。
標(biāo)簽: LVS 負(fù)載均衡技術(shù) 可伸縮 網(wǎng)絡(luò)服務(wù)
上傳時(shí)間: 2013-11-20
上傳用戶:15736969615
DEbug 關(guān)于制作瑞星殺毒軟件密鑰盤的源碼 MOV BX,200 ;內(nèi)存基址(0面) MOV DH,00 ;磁頭號(hào)00 MOV DL,00 ;驅(qū)動(dòng)器號(hào)00(A盤) MOV CX,4F01 ;4F(即79)號(hào)磁道01號(hào)扇區(qū) 即(CH=4F CL=01) MOV AH,05 ;格式化磁道 MOV AL,09 ;連續(xù)讀取9個(gè)扇區(qū) INT 13 ;調(diào)用13號(hào)中斷 INT 3 MOV BX,300 ;內(nèi)存基址(1面) MOV DH,01 ;磁頭號(hào)01 MOV DL,00 ;驅(qū)動(dòng)器號(hào)00(A盤) MOV CX,4F01 ;4F(即79)號(hào)磁道01號(hào)扇區(qū) 即(CH=4F CL=01) MOV AH,05 ;格式化磁道 MOV AL,09 ;連續(xù)讀取9個(gè)扇區(qū) INT 13 ;調(diào)用13號(hào)中斷 INT 20 ;返回dos 初學(xué)匯編,請(qǐng)各位多多指教!
上傳時(shí)間: 2015-01-07
上傳用戶:我干你啊
PowerFish is a class library, intended to provide a broad functionality base for any application. Although the focus is on game and demo development. PowerFish是一個(gè)類庫(kù),旨在為應(yīng)用程序提供一個(gè)廣泛的功能基礎(chǔ),雖然其重點(diǎn)是在游戲和演示開發(fā)。
標(biāo)簽: functionality application PowerFish intended
上傳時(shí)間: 2013-11-28
上傳用戶:2467478207
程序首先定義一個(gè)hello的函數(shù)調(diào)用int 21h mov ah ,09來顯示字符串,ds:dx定義字符串位置 來使用一個(gè)80×25的界面使整個(gè)程序更加美觀 游戲主程序調(diào)用BIOS int 10 的9號(hào)功能實(shí)現(xiàn)對(duì)目標(biāo)文本的顏色和定位,。游戲主程序可以用int 16 mov ah,00從鍵盤讀取輸入的字符在調(diào)用int 21 mov ah,01 讓鍵盤輸入顯示在屏幕中 al=輸入的字符,用cmp指令對(duì)輸入的文本和目標(biāo)文本進(jìn)行比較,再利用選擇語(yǔ)句將錯(cuò)誤的輸入字符顯示為紅色,將正確的輸入字符顯示為綠色。在整個(gè)字符串結(jié)束后直接退到dos環(huán)境
上傳時(shí)間: 2014-11-23
上傳用戶:waitingfy
This toolbox contains Matlab code for several graph and mesh partitioning methods, including geometric, spectral, geometric spectral, and coordinate bisection. It also has routines to generate recursive multiway partitions, vertex separators, and nested dissection orderings and it has some sample meshes and mesh generators. The toolbox contains a Matlab interface to Leland and Hendrickson s Chaco partitioning package, but it doesn t contain Chaco itself. The file "chaco/README" tells how to install the interface to Chaco. It also contains a Matlab interface to Karypis et al. s Metis partitioning package, using Robert Bridson s "metismex" code.
標(biāo)簽: partitioning including contains toolbox
上傳時(shí)間: 2015-05-25
上傳用戶:tzl1975
目前能實(shí)現(xiàn)隨意控制螞蟻的軌跡長(zhǎng)度(Path)、數(shù)量(Unit)、速度(V)、角度(R)、加速度(dv,dr)。 Kr和Kv是常數(shù),打算將來改成數(shù)組,作為用來控制螞蟻活躍程度的基因。
上傳時(shí)間: 2013-12-27
上傳用戶:225588
A C++ N-grams Package 2.0 This is a simple C++ n-grams package that includes a header, the corresponding cpp file, and a sample driver program. It is a natural language processing tool for creating n-gram profiles for text documents. The details on usage is documented in the header right above each public function defined. This package is based on Dr. Vlado Keselj s Perl package Text::Ngrams which is available in CPAN.
標(biāo)簽: includes correspo N-grams Package
上傳時(shí)間: 2015-06-12
上傳用戶:wfl_yy
8253的初始化程序舉例: 例1:選擇2號(hào)計(jì)數(shù)器,工作在3方式,計(jì)數(shù)初值為533H(2個(gè)字節(jié)),采用二進(jìn)制計(jì)數(shù)。其初始化程序段為 MOV DX,307H ;命令口 MOV AL,10110110B ;2號(hào)計(jì)數(shù)器的初始化命 令字 OUT DX,AL ;寫入命令寄存器 MOV DX,306H ;2號(hào)計(jì)數(shù)器數(shù)據(jù)口 MOV AX,533H ;計(jì)數(shù)初值 OUT DX,AL ;選送低字節(jié)到2號(hào)計(jì)數(shù)器 MOV AL,AH ;取高字節(jié)送AL OUT DX,AL ;后送高字節(jié)到2號(hào)計(jì)數(shù)器
標(biāo)簽: 8253 初始化程序 舉例 計(jì)數(shù)器
上傳時(shí)間: 2015-06-24
上傳用戶:zhangzhenyu
zemax源碼: This DLL models an anamorphic aspheric surface. This surface is essentially an even aspheric surface with different terms for the x and y directions. The sag is given by: Z = ((CX*x*x)+(CY*y*y)) / (1 + sqrt(1-((1+KX)*CX*CX*x*x)-((1+KY)*CY*CY*y*y))) + AR*( (1 - AP)*x*x + (1 + AP)*y*y )^2 + BR*( (1 - BP)*x*x + (1 + BP)*y*y )^3 + CR*( (1 - CP)*x*x + (1 + CP)*y*y )^4 + DR*( (1 - DP)*x*x + (1 + DP)*y*y )^5 Note the terms AR, BR, CR, and DR ... have units of length to the -3, -5, -7, and -9 power. The terms AP, BP, CP, and DP are dimensionless. The surface is rotationally symmetric only if AP = BP = CP = DP == 0 and CX = CY and KX = KY.
標(biāo)簽: surface This essentially anamorphic
上傳時(shí)間: 2015-07-25
上傳用戶:lht618
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