【正文】 1988 年 3 月，兩周時(shí)間的數(shù)據(jù)收集結(jié)束，覆蓋大致 3900 線(xiàn)圈，表明了 96％的輕型系列密封的線(xiàn)圈長(zhǎng)度在 +（ + 英尺）的范圍內(nèi)，并且，重型系列（ 6mm 以上）， 95％的密封的線(xiàn)圈的長(zhǎng)度在 +（ + 英尺）的范圍內(nèi)。由此引起的波形是多變的，隨著時(shí)間的改變和顯示高頻率元件（第 5 個(gè)諧波以上），通過(guò)軸承健作用而被引起。這個(gè)功能組塊的輸出說(shuō)明滾動(dòng)疊加傾斜的數(shù)量被拿來(lái)放置，引起不同的強(qiáng)度。 所有 AGC 氣缸運(yùn)動(dòng)的精度改變的結(jié)果都是帶的質(zhì)量 流量的改變，通過(guò)按順序請(qǐng)求大學(xué)畢業(yè)設(shè)計(jì) — 外文翻譯 14 液壓站速度改變引起 loopier 角度的變化。 ? 液壓自動(dòng)精度控制（ AGC） —— 包括在液壓 AGC 設(shè)備內(nèi)的工作特性能被分為傳統(tǒng)的能被考慮的那些，和有新穎的成分 的那些。這通過(guò)特殊的熱金屬檢測(cè)器結(jié)合緩沖地址寄存器速度測(cè)量法被完成。 卷偏心補(bǔ)嘗（ REC）的微處理器為了服務(wù)于任何一個(gè) F4 和 F7 站，被看見(jiàn)把最有效偏心輸入的任何一個(gè)進(jìn)行轉(zhuǎn)換，在將來(lái)，更進(jìn)一步的微處理器能簡(jiǎn)單的被加（ REC 功能上的更多細(xì)節(jié)晚一會(huì)兒會(huì)描述）。這樣的數(shù)據(jù)將包含所有的輸出數(shù)據(jù)（ PDI）和準(zhǔn)備資料。 ? 控制系統(tǒng)的硬件設(shè)備 浦項(xiàng)鋼鐵公司的一項(xiàng)主要業(yè)務(wù)是在不危害目前系統(tǒng)的前提下，進(jìn)行新的計(jì)算機(jī)系統(tǒng)綜合。性能細(xì)節(jié)見(jiàn)表 1。鋼塊準(zhǔn)確的表現(xiàn)了止動(dòng)塊和滾子的質(zhì)量 ，給出質(zhì)量彈簧在實(shí)際銑削條件下的實(shí)際表達(dá)。 第三類(lèi)伺服閥被運(yùn)用（穆格 79 系列）。當(dāng)氣缸處于失穩(wěn)狀態(tài)時(shí)基準(zhǔn)活塞被傾斜用于調(diào)節(jié)擺動(dòng)曲面。這些氣缸具有異常的動(dòng)態(tài)性能（ 28Hz,速度10mm/s). 大學(xué)畢業(yè)設(shè)計(jì) — 外文翻譯 10 由于實(shí)際距離在修邊機(jī) E4 與精加工 F4 至 F7 之間，分離泵的總成裝配能供應(yīng)到每一個(gè)地方。 戴維 .麥凱 的任務(wù)是將現(xiàn)代化的機(jī)械系統(tǒng)和液壓系統(tǒng)連接在總體機(jī)器上，利用計(jì)算機(jī)建立 AWC/AGC的控制，實(shí)現(xiàn)新的寬度，機(jī)械的安裝 ,進(jìn)行試車(chē)訓(xùn)練。 required force distribution pattern 。s major concerns was the integration of the new puter systems without jeopardizing the existing system . (The existing system was to remain service and be available as a standby facility at all times .) The 64bit parallel interface between the existing supervisory setup puter (SCC) and the PLC ( MELPLAC) responsible for screw AGC could not be expanded or duplicated . The solution was to interpose a PDP 11/73 with its standard digital I/O equipment betweent the SCC and the MELPAC to act as a munications link (Fig .9 ) . Its function was simple . It readin the data from the a SCC as 64bit data , stored it in memory and passed it immediately out again as identical digital output to the MELPLAC . The same exchange occurs in reverse order when data is passed back to the SCC . At each transaction , the 64 bits are decoded and converted into serial form for distribution to the remainder of the new systom . Such data would include all PDI and sretup information . Because of the extreme concern for reliability in this exchange , a standby PDP 11/73 was included .When not in use , the standby machine is available as a software development facility for the entire new system . These two machines were installed and missioned approximately four months before the main shutdown when their function , operation and reliability were established prior to the main missioning .In the main 14day shutdown , the remaining conputer systems were brought on line , although the AWC was given a lower priority than the AGC . 大學(xué)畢業(yè)設(shè)計(jì) — 外文翻譯 5 The overall system configuration is shown . Functionally , the HAGC for four stands were split between two 11/73 microprocessors to give a reasonable promise between cost and utilization . Approximately 40% of the processor capability remains unused . The roll eccentricity pensation (REC ) microprocessor can be switched to serve any one of stands F4 and F7 , whichever is seen to have the most significant eccentricity input . Afurther microprocessor could sasily be added in the future ( the REC function is described later in more detail ) . The functions of the coordinating and logging microprocessor are evident 。s contract was for the total ackage associated with modernization of the mechanical and hydraulic systems,the puterbassd AWC/AGC controls, new widthmeter, mechanical installation, missioning and training. The new equipment was put into service during a 14day shutdown in 1987. ? Outline of new facilities A priority requirement was that the new equipment should be integrated with the existing facility in such a way as to permit reversion to conventional operation in a few seconds. Accordingly, hydraulic AGC and AWC cylinders were designed to withstand normal rolling conditions when in a collapsed state. All of the control systems had to be in parallel with the existing systems (which were retained ) and existing operator39。 draft ensation and absolute or lockon feedback monitor . Absolute and lockon BISRA gagemeter modes for each hydraulic stand are selectable either automatcally by the SCC or manually . The BISRA gagemeter action artificially stiffens the mill modulus . This occurs because the feedback from the measured roll foece causes the AGC cylinders to extend to pensate for mill stretch . The amount of pensation can be varied from zero ( ie , no gagemeter action ) , which leaves the mill with its natural mechanical stiffness , to 100% which , in effect , increases the mill modulus to infinity . Each hydraulic stand can be given a stiffness value ( 0 to 100% ) either from the SCC or manually . Dynamic oil film pensation is obtained by cylinder movement to correct for dynamic changes in the backup roll bearing oilfilm thickness , which varies as a function of speed and roll load . Every gage correcting movement of the AG