Design and Experiment of Double Fuzzy Control System for Tea Cylinder Water-removing Machine

Abstract:

On the basis of analysis on processing technology of tea, the fuzzy algorithm was applied to realize the intelligent control of traditional tea cylinder waterremoving machine. By detecting the weight and grade of fresh tea leaves in the tea cylinder waterremoving machine, the fuzzy control rule of decisionmaking was used to adjust time and temperature of tea waterremoving realtimely; at the same time, fuzzy proportionintegrationdifferentiation (PID) controller was used to adjust temperature of tea waterremoving to realize the accurate control. Data acquisition and double fuzzy control system hardware were made up with NI USB-6215 data acquisition card and Siemens programmable logic controller (PLC), etc. In addition, output effect of double fuzzy control system model was tested by laboratory virtual instrument engineering workbench (LabVIEW). Finally, the possibility of the double fuzzy control system was proved by the substantial evidence and the result of tea waterremoving was tested. Experiment result show that this control system output parameters are ideal for the waterremoving of tea, the temperature departure of waterremoving is less than 1℃ and the time deviation of waterremoving of tea is less than 5s. This control system can reduce the human factors in the process of teamaking. Whats more, it will improve the intelligent level of the machine for teamaking.