Title :
An Application of Fuzzy Control Based on PLC in the Pressure Control System of Chinese Medicine Water Extraction
Author :
Qin, Jie ; Li, Shaobo ; Huang, Haisong
Author_Institution :
Key Lab. of Adv. Manuf. Technol., Guizhou Univ., Guiyang, China
Abstract :
The water extraction system of Chinese medicine exists problems for the control object characterized by multi-variables, large delay, nonlinearity and difficulty of building model. The method which applies intelligent fuzzy control on Chinese medicine extraction process is proposed. The key factors which influence the pressure in extraction tank are concluded in the basis of analysing water extraction process of Chinese medicine. The design of fuzzy controller is also completed. According to the characteristics of PLC, the fuzzy control is successfully used in PLC. From the simulation results, the fuzzy control is superior to that of the traditional PID control. The fuzzy controller has a good rapidity, stability and stronger robustness.
Keywords :
control nonlinearities; control system synthesis; delays; fuzzy control; intelligent control; medicine; multivariable control systems; pharmaceutical technology; pressure control; programmable controllers; stability; tanks (containers); Chinese medicine water extraction process; PLC; control nonlinearity; delay; extraction tank; intelligent fuzzy controller design; multivariable control system; pressure control system; robustness; stability; Fuzzy control; Niobium; Pressure control; Process control; Valves; Fuzzy control; PLC (programmable logic controller); Pressure; The water extraction of Chinese medicine;
Conference_Titel :
Computational Intelligence and Design (ISCID), 2011 Fourth International Symposium on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4577-1085-8
DOI :
10.1109/ISCID.2011.38
