Design Of Main Steam Pressure Self-organizing Fuzzy Sliding Mode Control System For CFBB

Circulating fluidized bed burning technology is a efficient and clean coal burning technology. It had gained very much attention in the world. In our country, strongly development and research of CFBB (circulating fluidized bed boiler) and its automatic control system is a urgent strategic task. Keeping the main steam pressure at normal level is the key to the stable and economic running process of CFBB. For the sake of fast development of CFBB in our country and fixing the flaw of general control system of main steam pressure, this paper provided a new automatic control system of CFBB main steam pressure which is based on intelligent control.By research of the sliding mode control and fuzzy control theory, this paper proposed a self-organizing fuzzy sliding mode controller and applied it to the main steam pressure control system of CFBB. This controller has the advantage of both sliding mode control and fuzzy control. It has incompact dependency with the model of control object, and has strong robustness. The controller has the characteristics of memory and learning. It is a intelligent controller which behaves like human being. This controller has better control performance when applying to the non-linear, time variant, long time delay control object.This paper carried out a simulation test on the self-organizing fuzzy sliding mode controller with MATLAB and its SIMULINK toolbox.The simulation results indicate that the control quality,the speediness,the stability and the robustness of the self-organizing fuzzy sliding mode control system are all superior to the general fuzzy control system and the sliding mode control system. This new controller can be applied to the real CFBB automatic control system.In the end, the paper showed a new way for the designing of CFBB automatic control system and self-organizing fuzzy sliding mode controller.