【正文】 e 和 ec的量化因子分別為 6和 60， u的比例因子為 。 (1)模糊控制器的結(jié)構(gòu) 模糊控制器的結(jié)構(gòu)如圖 1所示 選擇水位偏差（ e）和偏差變化率（ ec）作為模糊控制器的輸入，模糊控制器的輸出量為閥門(mén)開(kāi)度的增量信號(hào)Δ u。并且當(dāng)條件改變時(shí)，為了獲得好的控制性能，通常需要改變 PID 控制器的參數(shù)，但是模擬量的 PID 控制器參數(shù)的在線調(diào)整是很難的。 QS for the steam flow。 the scale factor of u is . We limit water flow the range of 0 kg / s to the rated flow 258kg / s when simulation. Consider the expected level step from the initial 0m to 10m, water level response is shown use the solid line in Figure 3. For contrasting the increase effect of fuzzy controller, we also carried out using the traditional PID control simulation. We can see, pared with traditional PID control, fuzzy controller has reported significant improvements in overshoot, settling time, steady degrees. V. CONCLUSION This paper designed a water level fuzzy control system aimed at steam generator?s characteristics of large time delay and model uncertainty. We also gave a simulation to the steam generator of Qinshan nuclear power plant, and achieved satisfactory results. The method can also be used for other large time delay and timevarying process control model, and has broad application prospects. 譯文 蒸汽發(fā)生器水位模糊控制研究 蒸汽 發(fā)生器是壓水反應(yīng)堆式核電廠里的一個(gè)重要的設(shè)備。 (2)蒸汽負(fù)荷擾動(dòng)下的動(dòng)態(tài)特性 假設(shè)給水流量保持不變，蒸汽負(fù)荷階躍增加，一方面，由于蒸汽流速比給水流速大，水位會(huì)下降；另一方面，隨著 蒸汽負(fù)荷的增加，內(nèi)部蒸汽壓力降低，液面的氣泡容積增加，從而引起水位增加。 (4)模糊推理和模糊判決 本次設(shè)計(jì)的模糊推理系統(tǒng)采用 Mamdani 型。這種方法同樣適用于其它的大滯后和非線性系統(tǒng)的控制模型，具有廣闊的應(yīng)用前景。當(dāng)偏差變化率為負(fù)，這表明水位有上升的趨勢(shì)，如果此時(shí)水位高，應(yīng)減小閥門(mén)開(kāi)度；相反，應(yīng)就應(yīng)當(dāng)開(kāi)大閥門(mén)。 (1)給水流量擾動(dòng)下的動(dòng)態(tài)特性 假設(shè)蒸汽流量保持不變，而給水流量階躍增加，一方面，由于新增給水的溫度要比蒸汽發(fā)生器中的飽和水的溫度低很多，因此，當(dāng)新水進(jìn)入后就會(huì)吸收大量的額外熱量，水中的氣泡含量大大減少，從而導(dǎo)致水位下降；另一方面，給水流量大于蒸汽負(fù)荷，引起水位線性增加。 or operation uses the maximum operation. Using a very small operation fuzzy implication, fuzzy rules integrated with great operations center Defuzzification method used. IV. SIMULATION EXAMPLES A pressurized water reactor steam generator in Chinese Qinshan nuclear power station has empirical model G1 (s), G2 (s) below: where Ps denote the rated load. When load at 15% ~ 90% Ps, use (6) and (8)。 GS (s) for the effect of the steam flow (load) to the steam generator water l