ICROS (제어로봇시스템학회지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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슬라이딩 모드 제어기와 관측기를 이용한 제어기 설계 기술 동향

  • Published : 2016.06.25
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Abstract

슬라이딩 모드 기법을 실제 적용하는데 있어서 고려해야 할 중요한 문제 중 하나는 스위칭 동작에 의한 채터링 현상이다. 본 논문은 슬라이딩 모드 제어기 및 관측기의 게인을 줄임으로써 채터링을 완화하기 위한 방법으로 슬라이딩 모드 외란 관측기와 적분 제어를 포함하는 슬라이딩 모드 제어 기법에 대해 소개한다. 슬라이딩 모드 외란 관측기는 시스템 불확실성에 의해 발생하는 등가 외란의 상대적으로 느리게 변하는 부분을 추정하도록 설계한다. 슬라이딩 모드 관측기로 추정된 불확실성을 슬라이딩 모드 제어 입력에 결합함으로써 제안하는 관측기 기반 제어기는 상대적으로 낮은 게인을 사용하여 제어 목표를 달성할 수 있다. 본 논문에서 제안하는 제어기의 성능을 기존 방법과 비교하기 위해 DC 모터 전류 제어 모의실험을 수행한다. 모의실험 결과를 통해 제안하는 슬라이딩 모드 외란 관측기 기반 제어기는 낮은 게인으로 강인한 성능을 달성하고 전류 맥동을 줄일 수 있음을 확인할 수 있다.

Keywords

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