The Application Of Fuzzy PID Control Based On Neutral Network On Temperature Control Of Furnace

In view of practical use, taking the regenerative furnace of the first plant of high-speed-wire factory of Tangshan steel company as object, the thesis studies the casual process of nonlinear and distributed parameter with big inertia,pure lag and casual disturbance. The feasibility and the form of combining neural network and fuzzy system with PID control are discussed. The theory of compound control-fuzzy-PID control based on neutral network is put forward. Comparison among the compound control, the PID control and the fuzzy self-tuning PID control is made in simulation. The main research work and contribution of this dissertation are as follows:1. A study of combustion of the furnace in high-speed-wire factory of Tangshan steel company is made, from which the conclusion is acquired, that is the process is a casual process of nonlinear and distributed parameter with big inertia, pure lag and casual disturbance. This makes prepare for further studies.2. A survey of PID control, fuzzy control and neutral network control is made, and the problems existing in neutral network control and fuzzy control, PID control are also discussed.3. An introduction of the approach of parameter fuzzification and basic identification methods is followed.4. The fuzzy-PID control arithmetic based on neutral network is proposed, according to characteristics of neutral network control and fuzzy system and PID system.5. MATLAB and Simulink software are introduced at last. The simulation experiments are made for the arithmetic of fuzzy-PID based on neutral network in MATLAB. Comparisons are made among the arithmetic, PID control and fuzzy self-tuning PID control. It is showed that satisfied performance, strong robustness and disturbance-rejection are obtained by using the arithmetic put forward in this thesis. In addition, it is simple for system designing and convenient to use in industrial control.