A Study on the Stability of Control for Nonlinear Saturated Systems

비선형 포화시스템 제어에 관한 안정성 연구

  • 정상화 (조선대학교 기계공학부) ;
  • 오용훈 (한국산업기술평가원) ;
  • 류신호 (조선대학교 대학원 기계공학과) ;
  • 김상석 (조선대학교 대학원 기계공학과)
  • Published : 2000.10.01

Abstract

In realistic control systems, the nonlinear salutation attributes of the control actuator due to physical limitations should be taken into account. This nonlinear saturation of actuators may cause not only deterioration of the control performance but also a large overshoot during start-up and shut-down. As the overshoot increases, the system may become oscillatory unstable. In this paper, the supervisor implementation which guarantees good performance lot saturation operation and prevents reset wind-up is presented. Moreover, the sufficient conditions of the stability for saturated systems using supervisory control with a dynamic controller are provided in the discrete-time domain. A numerical example is illustrated to depict the efficiency of supervisory control for a typical saturated production-distribution system controlled by a discrete-time dynamic controller and to validate basic results by simulation.

Keywords