數(shù)控專業(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)(存儲(chǔ)版)
【正文】 穩(wěn)態(tài)精度， PI 控制算法和模糊控制算法均有 PLC 實(shí)現(xiàn)切換時(shí)機(jī)計(jì)算機(jī)程序根據(jù)事先給定的誤差范圍自動(dòng)實(shí)現(xiàn)?？删幊炭刂破鬟x用 AB 公司的 ControLogix 系統(tǒng)，它包括 Logix5550 控制器、模擬量輸入模塊、數(shù)字量輸入輸出模塊及通信模塊，其中模擬量輸入模塊用來(lái)檢測(cè)出水口壓力信號(hào)，數(shù)字量輸入模塊用來(lái)檢測(cè)各種開關(guān)量，數(shù)字量輸出模塊用來(lái)控制點(diǎn)擊和閥門的啟、停。 本系統(tǒng)采用西門子公司的 S7200 系列 PLC 及其組態(tài)軟件 構(gòu)成恒壓供水控制系統(tǒng)，實(shí)現(xiàn)供水過(guò)程的壓力監(jiān)控，工業(yè)以太網(wǎng)用于PLC 控制器和計(jì)算機(jī)操作站之間的通訊，遠(yuǎn)程 I/O 網(wǎng)用于 PLC 控制器與變頻器、軟啟動(dòng)器的設(shè)備之間的通訊， PLC 控制權(quán)威主要用來(lái)檢測(cè)和控制供水系統(tǒng)和供電系統(tǒng)、用于 1~4加壓泵的變頻器采用 ABB 公司的 ACS51001031A4 變頻器， HMI 操作站選用 DELL 計(jì)算機(jī)，工控機(jī)。 Inverter start again on the 2nd pump operation. If pressure is less than the set value, they will be on the 2nd to pump switching frequency operation。 When the pressure on the steadstate error into smaller, switched to process from PI control, to obtain good steady precision. PI control algorithms and fuzzy control algorithms are PLC, switching time by a puter program based on prior to the error autormatically. The system uses twoinput singleoutput fuzzy controller. to pressure the desired value and the measurement of e error and the error as a fuzzy controller input linguistic variables, transducer frequency variation u language as output variables. To e error, the error rate ec and control volume u fuzzy subset of ( NB,NS,ZE,PS,PB) and they quantified the domain of seven grades, (3,2,1,0,1,2,3). Fuzzy subset of the membership function used triangle. Initial experience of fuzzy control rules, as shown in table 1. Under these rules calculation of the total fuzzy relation R: 畢業(yè)設(shè)計(jì)（論文）外文翻譯 Where x, U fuzzy relationship matrix on behalf of the “Cartesian” and the “and” operator. According minimax inference rules synthesis of output variables language domain of fuzzy sets U: U Finally, the weighted average method used for solutions vague and fuzzy volume U converted into precise amount u. The process is carried out offline, eventually Fuzzy Control Table, as shown in table 2. This form of the PLC memory storage, realtime control, fuzzy control would streamline the process for finding inquiries on the questionnaire process. Parametric Selection of Frequencywater system a reasonable selection pressure control parameters constant pressure to achieve energysupply system. The realization of is this objective the key is pressure control parameter selection, usually pipe work pressure control point two choice: a pipe work is the most negative pressure on constant pressure control and the other is the constant pressure pump outlet. pressure control. How will the two choices, we have to analyze simple Network pr
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