• 제목/요약/키워드: Reduced Order Observer

검색결과 108건 처리시간 0.031초

유한시간 감소차수 관측자의 설계 (On the Design of a Finite Time Reduced Order Observer)

  • 이기상
    • 전기학회논문지
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    • 제59권5호
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    • pp.961-965
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    • 2010
  • A reduced order observer with finite time convergence characteristics is proposed for linear time invariant systems. The proposed finite time reduced order observer(FTROO) is a dual observer scheme in which two reduced order Luenberger observers with asymptotic convergence characteristics and a finite time delay element are employed. The FTROO can be constructed so as to converge in the designer specified finite time independent of the eigenvalues of the reduced order observers. A numerical example is given to show the finite-time convergence characteristics of the proposed FTROO.

입출력선형화 상태변환을 이용한 비선형 시스템의 저차 관측기 설계 (Reduced-Order Observer Design for Nonlinear Systems Using Input Output Linearization Transformation)

  • 조남훈
    • 제어로봇시스템학회논문지
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    • 제10권10호
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    • pp.907-914
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    • 2004
  • In this paper, we present a reduced-order observer for a class of nonlinear systems based on the input output linearization. While the most results in the literature presented full-order nonlinear observer, we proposed a procedure for the design of reduced-order observer far nonlinear systems that are not necessarily observable. Assuming that there exists a global observer fer internal dynamics and that certain functions are globally Lipschitz, we can design a global reduced-order observer An illustrative example is included that demonstrate the design procedure of the proposed reduced-order observer.

단측 Lipschitz 비선형시스템의 축차 관측기 설계 (Reduced Order Observer Design for One-Sided Lipschitz Nonlinear Systems)

  • 이성렬
    • 제어로봇시스템학회논문지
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    • 제19권4호
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    • pp.281-284
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    • 2013
  • This paper describes a reduced observer design problem for one-sided Lipschitz nonlinear systems which are considered as a generalization of Lipschitz systems. The sufficient conditions to ensure the existence of reduced order observer are provided by using linear matrix inequalities. Moreover, it is shown that existence conditions of reduced order observer can be obtained from sufficient conditions on the existence of full order observer. As a result, this fact implies that the existence of full order observer for one-sided Lipschitz systems guarantees that of reduced order observer. Finally, a simulation example is given to verify the validness of the proposed design.

축소차원 Luenberger 관측기를 이용한 단상 PWM 컨버터의 고역률 제어 (The High Power Factor Control of a Single Phase PWM Converter using a Reduced-Order Luenberger Observer)

  • 양이우;김영석
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제49권8호
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    • pp.529-535
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    • 2000
  • In this paper, a current control system of a single phase PWM AC/DC converter using a reduced-order Luenberger observer without source voltage sensors is proposed. The sinusoidal input current and unity input power factor are realised based on the estimated source voltage performed by the reduced-order Luenberger observer using actual currents and DC link voltage. The poles of the reduced-order Luenberger observer are placed in the left half plane of s-plane by the pole-placement method in order to acquire the stability of the observer. The magnitude and the phase of the estimated source voltage are used to accomplish the unity power factor. The proposed method is implemented by DSP(Digital Signal Processor). Experimental Results verify that the reduced-order observer estimates the source voltage without the estimation error and the control system accomplishes the unity power factor, and constant DC link voltage.

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선형 축소차수 동적 관측자를 사용한 확장된 상태 추정 방법 (Extended State Estimation Method Using Linear Reduced-Order Dynamic Observers)

  • 박종구
    • 제어로봇시스템학회논문지
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    • 제7권6호
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    • pp.487-493
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    • 2001
  • In this paper, a new reduced-order dynamic observer method is presented. Two types of observers are pronounced, namely, the model based reduced-order dynamic observer and the Luenburger type reduced-order dynamic observer. Useful design algorithms are also provided for each structure. The essential features of the proposed observed design methods are addressed to be qualified ad effective observers. The proposed method clarifies the duality between the controller and observer designs.

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비선형 저차화 관측기의 설계기법 및 구보시스템에의 적용 (A Nonlinear Reduced Order Observer Design and Its Application to Ball and Beam System)

  • 조남훈
    • 대한전기학회논문지:시스템및제어부문D
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    • 제53권9호
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    • pp.630-637
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    • 2004
  • In this paper, we present a local reduced-order observer for a class of nonlinear systems that have full robust relative degree. The proposed observer utilizes the coordinate change which transforms a nonlinear system into an approximate normal form. The proposed reduce order observer is applied to a ball and beam system, and simulation results show that substantial improvement in the performance was achieved compared with the jacobian linearization observers.

전차수 슬라이딩 모드 관측기를 대체하는 축소차수 관측기의 LMI 기반 설계 (An LMI-Based Design of Reduced Order Observers Substitutable for Full Order Sliding Mode Observers)

  • 최한호
    • 제어로봇시스템학회논문지
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    • 제14권3호
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    • pp.232-235
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    • 2008
  • This paper presents an LMI-based method to design reduced order observers by which we can substitute full order sliding mode observers for a class of uncertain time-delay systems. We show that a reduced order observer can be constructed as long as the uncertain system satisfies the previous LMI existence conditions of a full order sliding mode observer. And we give explicit formulas of the reduced order observer gain matrices. Finally, we give a simple LMI-based design algorithm, together with a numerical design example.

Lipschitz 비선형 시스템의 강인 저차 상태 관측기 (Robust Reduced Order State Observer for Lipschitz Nonlinear Systems)

  • 이성렬
    • 제어로봇시스템학회논문지
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    • 제14권8호
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    • pp.837-841
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    • 2008
  • This paper presents a robust reduced order state observer for a class of Lipschitz nonlinear systems with external disturbance. Sufficient conditions on the existence of the proposed observer are characterized by linear matrix inequalities. It is also shown that the proposed observer design can reduce the effect on the estimation error of external disturbance up to the prescribed level. Finally, a numerical example is provided to verify the proposed design method.

축차관측기를 사용한 슬라이딩 모드 제어 (Reduced Order Observer Based Sliding Mode Control)

  • 최한호
    • 제어로봇시스템학회논문지
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    • 제12권11호
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    • pp.1057-1060
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    • 2006
  • This paper presents an LMI-based method to design a reduced order observer based sliding mode controller for a class of uncertain systems. Using LMIs we derive an existence condition of a reduced order observer and a sliding mode control law. And we give explicit formulas of the gain matrices. Finally, we give a numerical design example, together with a design algorithm.

縮小次數 觀測器에 의한 位置制御 油壓 서어보시스템의 過度應答特性 改善 (Improvement of transient response characteristics of hydraulic servo system for position control by reduced-order observer)

  • 이경수;이교일
    • 대한기계학회논문집
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    • 제11권6호
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    • pp.1036-1043
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    • 1987
  • 본 연구에서는 유압 서어보 시스템을 유압 피스톤의 변위와 속도를 상태변수 로 하는 2차 선형 시스템으로 모델링하여 변위는 측정된 출력으로부터 직접 구하고 속 도는 B. Gopinath 와 D.G. Cumming에 의해 발전된 축소차수 관측기(Reduced-order Ob- server)를 사용하여 추정하며 이를 피이드백 제어에 이용하였다.