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數(shù)控專(zhuān)業(yè)畢業(yè)設(shè)計(jì)外文翻譯--wincc在供熱站恒壓供水監(jiān)控系統(tǒng)中的應(yīng)用-數(shù)控設(shè)計(jì)-預(yù)覽頁(yè)

 

【正文】 o of the system of automatic detection and automatic constant pressure water and coal Gallcry equipment operation realtime data data ,realtime display and unit alarm and automatic parking operation .Theconstant pressureof water supply pressure system configuration monitoring regulatory pressure pumps water pressure and so Gallery in to control the coal to speed,to monitor the quality of coal (coal crushing degree of quality and impurity) PLCBased Fuzzy Constant water suppl。 Inverter start again on the 3rd pump operation until the output pressure settings to achieve so far. However, if users to reduce water consumption, in accordance with the “Kaistop” principle will be followed with pumps. This cycle repeatedly to achieve constant pressure water system. Fuzzy2PI control algorithm As the water supply system in many areas (such as the pipe work and pumps) nonlinear, timevarying, and the variables still exist between the crosscoupling, so it is difficult to establish a precise mathematical system model. For such a plicated process that merely using the conventional PID control is difficult to achieve the desired control. Fuzzy control is not dependent on the mathematical model and the right parameters sensitive to the merits, Fuzzy used to control the water supply system, we can improve the control system dynamic performance. But Fuzzy Control System steadystate performance is poor, this design of a dualmode Fuzzy2PI control, As shown in figure 2, and its design thinking is。它主要是由變頻調(diào)速系統(tǒng)、 PID。服務(wù)器的工業(yè)以太網(wǎng)通訊網(wǎng)卡采用西門(mén)子公司的 CP1612. 本控制系統(tǒng)軟件采用西門(mén)子公司的 軟件包, PLC 控制器采用 , HMI 監(jiān)控系統(tǒng)采用 版本, HMI 服務(wù)器和操作站都采用的是 Windows2020操作系統(tǒng)具有開(kāi)放的編程環(huán)境 . 畢業(yè)設(shè)計(jì)(論文)外文翻譯 供熱站使用 Wincc 組態(tài)軟件主要監(jiān)控恒壓供水系統(tǒng)和輸煤廊兩部分。在恒壓供水系統(tǒng)設(shè)定供水壓力參數(shù),實(shí)時(shí)監(jiān)控調(diào)節(jié)加壓泵,使供水壓力保持定值。變頻器選用 AB 公司的 1336Plos 變頻器,變頻器與控制器通過(guò) Devi2 ceNet 網(wǎng)絡(luò)進(jìn)行通信。變頻器畢業(yè)設(shè)計(jì)(論文)外文翻譯 再啟動(dòng) 3 號(hào)泵運(yùn)轉(zhuǎn),知道輸出水壓達(dá)到設(shè)定值為止。 本系統(tǒng)采用雙輸入單輸出模糊控制器,以水壓給定值和測(cè)量值的誤差e 及誤差變化率 ec 作 為模糊控制器的輸入語(yǔ)言變量,一變頻器頻率變化量 u 作為輸出語(yǔ)言變量。將此表存放在 PLC 內(nèi)存中,實(shí)時(shí)控制實(shí)現(xiàn)模糊控制的過(guò)程便簡(jiǎn)化為查找查詢(xún)表的過(guò)程 。在標(biāo)簽數(shù)據(jù)庫(kù)中建立一個(gè) 7x7 的二維數(shù)組標(biāo)簽 array,將查詢(xún)表 2 的結(jié)果按照從上倒下,從左到右的順序一次輸入到數(shù)組標(biāo)簽中,由于 E、 Ec 的量化等級(jí)為【 3, 3】,而數(shù)組標(biāo)簽 array的其實(shí)地址為【 0, 0】 ,因此在尋址時(shí)需要加偏移量,即: u=array( i+3, j+3),模糊控制器將計(jì)算得到的實(shí)測(cè)誤差 e 和誤差變化量畢業(yè)設(shè)計(jì)(論文)外文翻譯 ec 量化,取得以相應(yīng)論域元素表征的查找查詢(xún)表所需的 i 和 j,通過(guò)數(shù)組標(biāo)簽 array 尋址得到控制量變化 uij, uij 再乘以比例因子便是控制量變化量 ?u。這個(gè)目的的實(shí)現(xiàn)關(guān)鍵在于壓力控制參數(shù)的選取,通常管網(wǎng)壓力控制點(diǎn)的選擇有兩個(gè);一個(gè)就是管網(wǎng)最不利點(diǎn)壓力恒壓控制,另一個(gè)就是泵出口壓力恒壓控制。變頻器根據(jù)負(fù)載的轉(zhuǎn)動(dòng)慣量的大小,在啟動(dòng)和停止電機(jī)時(shí)所需的時(shí)間不相同,設(shè)定時(shí)間過(guò)短會(huì)導(dǎo)致變頻器在加速時(shí)過(guò)電流、在減速時(shí)過(guò)電壓保護(hù);設(shè)定時(shí)間過(guò)長(zhǎng)會(huì)導(dǎo)致變頻器在調(diào)速運(yùn)行時(shí)使系統(tǒng)變的調(diào)節(jié)緩慢,反應(yīng)遲滯,應(yīng)變能力差,系統(tǒng)易處在短期不穩(wěn)定狀態(tài)中。
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