Molten steel level control of strip casting process using stable adaptive fuzzy control scheme

안정 적응 퍼지 제어기를 이용한 박판 주조 공정에서의 용강 높이 제어

  • 주문갑 (포항산업과학연구원 S/C 프로젝트팀) ;
  • 이대성 (포항산업과학연구원 S/C 프로젝트팀) ;
  • 김윤하 (포항산업과학연구원 S/C 프로젝트팀)
  • Published : 2001.07.18


An adaptive fuzzy logic controller to regulate molten steel level in the strip casting process is presented, where parameters of fuzzy controllers are adapted stably by using Lyapunov-stability theory and a switching controller is used together to deal with the approximation error of fuzzy logic system. The level error is proven to converge to zero asymptotically. In the simulation, the clogging/unclogging of a stopper nozzle is considered and overcome by the proposed controller. Robustness to uncertainty is shown to be superior to conventional PI controller.