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Research on the Scheme of Rice Hull Roaster Fuzzy-PID Temperature Control System

Author: LvChangMing
Tutor: LiYongJin
School: Dalian Jiaotong University
Course: Mechanical and Electronic Engineering
Keywords: Roaster Programmable Controller Fuzzy PID Control MATLAB simulation
CLC: TP273.4
Type: Master's thesis
Year: 2008
Downloads: 232
Quote: 6
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Abstract


Temperature is the main industrial control object charged with one of the parameters . Temperature control object thermal inertia , vulnerable to interference , and has time-varying delay, nonlinear , strong coupling and other characteristics. China recently proposed a high-purity extracted from rice husk silica nano- industrial production methods. Throughout the production process is the main production processes of pyrolysis , pyrolysis temperature control is the key technology . Aiming at this problem to design a precise control of the temperature of pyrolysis temperature control system , to achieve the reasonable control of the calcination temperature . In this paper, the temperature of rice husk roaster technical requirements, systematic study of the conventional PID control and fuzzy control their own characteristics . Try two control methods combined with each other to form fuzzy PID controller , to play their respective advantages . PID control and fuzzy control combined with a variety of ways , this paper uses a fuzzy self-tuning PID control algorithm . The algorithm is to find the PID three parameters and error and error rate of change of fuzzy relations between , in operation by continuously detecting error and error rate of change , according to the fuzzy control theory online modification of the three parameters , so that the controlled object has a good dynamic and static performance . Paper, according to the characteristics of the controlled object , completed a fuzzy self-tuning PID controller design , elaborated a detailed design process. In order to better meet the needs of industrial production , this paper uses the Siemens S7-300 programmable controller as the control center for system design . Programmatically fuzzy self-tuning PID control algorithm, using off-line calculations to be made of fuzzy rules fuzzy query tables, queries through the online mode fuzzy control output , and finally the PID parameter correction value and the reference value added to obtain the PID instantaneous value parameter , the last PID operation to obtain the amount applied to the control object control actuators. Finally, on the different control methods in MATLAB simulation , with emphasis on fuzzy self-tuning PID control simulation debugging. Through the analysis of the simulation results than the right, drawn using fuzzy self-tuning PID control method is more able to meet the technical requirements of rice husk roaster is one able to achieve satisfactory control effect design.

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