매개변수의 불확실성에 대한 이산시간 가변구조 제어기법의 견실성

Robustness of discrete-time variable structure control to parametric uncertainties

  • 은용순 (서울대학교 공과대학 전기공학부 및 제어계측신기술연구센터) ;
  • 조동일
  • 발행 : 1997.10.01

초록

Robust stability conditions for discrete-time variable structure control is proposed. Conventionally the discrete-time variable structure control method with a variable structure uncertainty compensator approach requires a bounded changing rate of the uncertainties to ensure robust stability. However, when uncertainties vary as a function of state variables, which occur with parametric uncertainties, it is not reasonable to assume a bounded variation on the uncertainties. In this paper, uncertainties are assumed to consist of exogenous disturbances and parametric uncertainties. An uncertainty compensator is used to deal with the former, and a robust stability condition is derived using Small Gain Theorem for the latter.

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