The Design And Realization Of H_∞Fuzzy Controller For Networked Control System

With the rapid development of computer as well as communication and controltechnology, the capacity of networked control system becomes more and morecomplex.There need an intelligent, reliable controller with abundant network functionand high integrative performance during the process of industial control. Thedissertation focuses on realization of H∞fuzzy controller based on embedded system.Firstly, in the segment of controller realization, using ARM9as embeddedhardware platform, the Human-Machine Interface(HMI) of controller is designed bythe tool of Qt/Embedded based on Linux Operating System. The data iscommunicated by TCP/IP and RS232serial so that the controller can control plantsremotely and timely. The embedded database SQLite3.0is transplanted intoembedded controller in order to make operators more convenient to fault detectingand query data.Secondly, in the segment of controller algorithm design, the TS fuzzy model isapplied to describe the linear system and nonlinear system respectively. Using aBernoully distributed white sequence to describe the missing data in the networkedcontrol system and the probability of the occurrence of unreliable data is assumed tobe known, based on the concept of the parallel distributed compensation(PDC), amethod of designing a fuzzy dynamic output feedback controller was proposed vialinear matrix inequality(LMI).At last, transplanting the algorithm of controller into ARM-based embeddedsystem, and the state response can prove the algorithm is reasonable.