锅炉系统的模糊控制.doc

Study on the fuzzy adaptive PID algorithm for control system of biomass boiler Abstract—The fuzzy adaptive PID control system is developed for the biomass boiler due to the new problems brought by the biomass fuel. The fuzzy adaptive PID control algorithm has been deeply researched. By comparing it with the normal PID control algorithm about the reaction to the interference signals, the writer of the paper draws the conclusion that the performance of the control system has been greatly improved by the proposed algorithm. The fuzzy PID control strategy enables the system to have the advantages of strong anti-interference, flexibility, adaptability and high control precision. Keywords- biomabiomass boiler; fuzzy adaptive control; PID algorithm; simulink I. INTRODUCTION The biomass boiler has been used more abroad because it has some advantage of saving energy resources, zero discharging of the greenhouse gas and environmental protection. Compared with the fossil fuels, the biomass fuels have great difference in component and configuration. The basic characteristics of biomass are: washiness, large volume of the produced flue gas, high heat loss of the exhaust emissions; small density, loose structure, the proportion of suspension burning is large. After the separation of volatilization, the coke granule wrapped with ash is difficult to burn out [1]. At present, the control system of boiler is in the stage of constant perfection and becomes mature gradually, but the research of control algorithm of biomass boiler is a brand new issue, the operation effect of the burning control system of the biomass boiler is not satisfactory, in that it cannot meet the need of load, heat efficiency cannot be effectively promoted, it is too reliable on experienced operators in operation, and data control is not effective [2]. With increasing of the interference factors, how to design the effective control method combining the operation practice of the biomass boiler is becoming the i