The Application of Fuzzy Adaptive PID Theory in Deaerator SystemReport as inadecuate




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The oxygen in the boiler feed water is the main reason of device corrosion. Oxygen corrosion is one of the biggest dangers of boiler. The common deoxidization method is heating power deoxidization. The temperature and pressure must be kept steady to get rid of oxygen in water effectively. The deoxidization system with a nonlinear structure is characterized by multi-input multi-output and has great time delay. Its temperature and pressure are strongly coupled. For these reasons, it is hard to establish its precise mathematical model. But these requirements are almost unreachable when the ordinary PID control scheme is applied. Intelligent method is required. This paper presents a method of designing based on the fuzzy adaptive PID control theory. Simulation of control system is performed to study the performance of fuzzy adaptive PID control by MATLAB and other control methods, simulation results show fuzzy adaptive PID control theory reduces settling time and also shows a very brilliant performance comparing to other methods. It is suitable for application in engineering projects.

KEYWORDS

deoxidization system; temperature control; fuzzy adaptive PID control theory

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Author: Nina Zhou

Source: http://www.scirp.org/



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