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Research on Control System of Pure Breed Solid State Fermentation

Author: ZhangLiang
Tutor: XuYouLin
School: Nanjing Forestry University
Course: Detection Technology and Automation
Keywords: Solid state fermentation Fuzzy control Single-Chip computer LabVIEW
CLC: TP273
Type: Master's thesis
Year: 2009
Downloads: 243
Quote: 0
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Abstract


In recent years,with the development of industry,energy crisis and environmental problem are becoming more serious with each passing day.Liquid state fermentation consumes a great deal of energy and lead to some other problems,such as environmental pollution,low yield and long fermentation time.Solid state fermentation technology has once again aroused people’s attention.In this paper,the solid state fermentation control system was designed based on the analysis of the principle and the process flow of the solid state fermentation.The C8051F021 was taken as the central processing unit in solid state fermentation control system,which can realize the measurement and control of related parameters of the solid state fermentation by designing the microcontroller and peripheral function units.The modularization and opening design method was used to design the hardware and software of the controlling unit.In the portion of hardware circuit,the standardization and modularization chips were used and in the portion of software,the multi-task design method was used,which improved the agility and the transplant of the software effectively.The process of the solid state fermentation is difficult to control well if we only use the traditional control methods because of characteristics of the solid state fermentation itself,such as its great inertia,serious time-lag and the difficulty to establish an accurate mathematical model of the object.So the fuzzy control technology was introduced in this paper.Solid-state fermentation temperature fuzzy self-tuning PID controller was designed based on fuzzy control combined with PID control.Through the simulation analysis,the controller can achieve good control and meet the demand of the process of the solid state fermentationThe supervising system of the solid state fermentation has designed by LabVIEW in the personal computer system,which can communicate with the controlling unit through the RS232.The supervising system can set up the parameters in accordance with the different requirements of the process and also can real-time acquisition,display and management of solid-state fermentation process parameters.This system designed in this paper is simple,intuitive and easy to operate,which has a good human-computer interaction.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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