Robust Control Of Stochastic Uncertain Systerms For Refining Process

Pulp-refining process is a very important teche in pulp and paper made, It directly affects on the quality of paper producing efficiency,energy waste and so on. The qua- lity of pulp is stabilizing if guarateeing pulp-refining charatice stabilizing and reducing energy waste greatly. Pulp-refining process is a fast and dynamic process including lots of stochastic uncertain factor, how to token auti-cause of the quality of pulp and affection the level to achieve the robust optimal control of pulp-refining is researched object in which pulp refining and paper made is interested.At the base of reviewing lots of literature and extensively analysing theory. The present status about refining process controlling mathematical model is comprehen- sively introduced, a few well-know controlling models that applied in practical are commented, and the problem in these models and the feasibility that makes stochastic uncertain systems expressed by stochastic differential equations apply in pulp refining process as future project are discussed. Theoretical analyses and simulation results show that the control scheme is effective and practicable.This paper researches on the theory and application about pulp refining process controlling modeling , The important work is as follows:1. The present status about refining process controlling mathematical modelThe present status about refining process controlling mathematical model is comprehensively introduced, a few well-know controlling models that applied in practical are commented, and the problem in these models and the feasibility that makes stochastic uncertain systems expressed by It(o|^) stochastic differential equations apply in pulp refining process as future project are discussed.2. Several controlling methods about stochastic systemIntroducing several controlling methods about stochastic system, Telling of the development of stochastic system and the design of controller and Offering strongly bases for refining process controlling mathematical mode3. The design of system collectivity controlling schemeThis paper presents a robust H_∞filtering control of stochastic uncertain systems for refining process base on SEL theory and the relation between the pulp refining charatic exponent, designes a H_∞filtering controller and getting it by LMI method and guarantee -s an adequate level of the performance. 4. Simulation analyse for the systemAt the base of the research, applying on MATALAB simulation program to simulate. Theoretical analyses and simulation results show that the control scheme is effective and practicable.