外文翻譯----蒸汽發(fā)生器水位模糊控制

1、 學(xué) 號 24081900389 南湖學(xué)院 南湖學(xué)院畢業(yè)設(shè)計（論文）英文翻譯英文題目 英文題目：Research on Fuzzy Control for Steam Generator Water Level中文題目： 中文題目：蒸汽發(fā)生器水位模糊控制研究文獻出處 文獻出處：Computer, Mechatronics, Control and Electronic Engineering (CMCE), 2010 Inte

2、rnational Conference on Date of Conference: 24-26 Aug. 2010作者姓名： 作者姓名：Pengwei譯者姓名： 譯者姓名：楊 勝專 業(yè)： 業(yè)：機械設(shè)計制造及其自動化完成時間： 完成時間：2012.5.25The balance of the steam generator water level is maintained through the match between

3、 the water flow and steam flow. The process that water level changes with the steam flow or water flow changing can be regarded as a simple integration process, but impact of the water flow and steam flow ‘s change on wa

4、ter level is different.A. Dynamics Characteristics under Water Flow DisturbanceSuppose steam flow GS remains unchanged, and water flow GW step increases, on the one hand because the temperature of feed water is much lowe

5、r than the temperature of saturated water in the steam generator, so that , when feed water entering, it will absorb a lot of extra heat, the vapor phase bubble contents will reduce, resulting in water level decreasing;

6、on the other hand, the increase in water flow GW made it greater than steam load, and cause water level increases linearly. Comprehensive two factors, after the step increase of the water flow, the water level rise has a

7、 time delay process, showing a down then up.B. Dynamic Characteristics under Steam Load DisturbanceSuppose feed water flow GW remains unchanged, and steam load GS step increases, on the one hand the water level will flow

8、 down because the steam flow rate is greater than the water flow rate. On the other hand, as the steam load increased, vapor pressure is reduced; the bubble volume on the liquid surface increases, causing the water level

9、 increased. Comprehensive two factors, after the step increase of the steam flow rate, the water level down has a time delay process, showing a up then down. The impact on the water level of water flow or steam flow step

10、ping decreased has similar principle as above.As analysis can be seen as above, when the water flow or steam load change, the water level did not follow the change immediately, but there is an opposite process at first.

11、This phenomenon is called “false water level“ phenomenon.III. DESIGN OF WATER LEVEL FUZZY CONTROLLERThe conventional PID controller has a poor control performance to the steam generator that exist “false water level” cha

12、racteristics, showing a greater overshoot in the tracking time. But a well-designed fuzzy controller is able to overcome the “false water level“ phenomenon, and has good control performance. A. Sstructure of Fuzzy Contro