• 제목/요약/키워드: Multivariable feedback

검색결과 62건 처리시간 0.028초

3상 전력변환 시스템을 위한 다변수 상태궤환 제어 (Multivariable State Feedback Control for Three-Phase Power Conversion systems)

  • 이동춘;이지명
    • 전력전자학회논문지
    • /
    • 제2권1호
    • /
    • pp.1-11
    • /
    • 1997
  • 본 논문은 전력변환 시스템의 제어 특성 개선을 위해 전향제어를 갖는 다변수 상태궤환제어를 제시하였다. 이론의 적용대상은 3상 전압형 PWM 컨버터 및 인버터 그리고 3상 전류형 PWM 컨버터 및 인버터 시스템이며, 이들의 등가회로 및 모델링이 유도되고 해석되었다. 다양한 시뮬레이션에 의해 제시된 방법의 타당성을 검증하였다.

  • PDF

선형 다변수 시스템에 대한 Eigenstructure Assignment (Eigenstructure Assignment for Linear Multivariable Systems)

  • 권봉환;윤명중
    • 대한전자공학회논문지
    • /
    • 제24권2호
    • /
    • pp.215-222
    • /
    • 1987
  • This paper generalizes the previous results of the closed-loop eigenstructure assignment via output feedback in linear multivariable systems. Necessary and sufficient conditions for the closed-loop eigenstructure assignment by output feedback are presented. Some known results on entire eigenstructure assignment are deduced from this results.

  • PDF

QFT를 이용한 다변수시스템의 제어기 설계 (A Multivariable Control design using Quantitative Feedback Theory)

  • 최용희;정재윤;박용식;김영철
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1999년도 추계학술대회 논문집 학회본부 B
    • /
    • pp.475-478
    • /
    • 1999
  • In this paper, we propose the robust performance design of multivariable systems within the framework of Quantitative Feedback Theory(QFT) using ICD. The ICD(Individual Channel Design) is a multivariable control method based on the classical frequence response. It is considered to apply feedforward controller for compensating the effect of interconnection between channels. Performance of the proposed method are demonstrated by simulations in appling gas turbine model.

  • PDF

Robust suboptimal regulator design for linear multivariable system

  • Lee, Jae-Hyeok;Bien, Zeungnam
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 1990년도 한국자동제어학술회의논문집(국제학술편); KOEX, Seoul; 26-27 Oct. 1990
    • /
    • pp.841-846
    • /
    • 1990
  • In this study, a design method to obtain a robust suboptimal regulator for linear multivariable system is presented. This new design method is based on the optimal regulator design method using eigen-structure assignment and it uses additional cost function which represent robustness of the closed loop system. When we design the regulator using pole assignment method for linear multivariable system we have extra degree-of-freedom after assigning desired eigenvalues of the closed loop system in determining the feedback gain. So we assign additional robust suboptimal regulator. In this study we also feedback the system output for more practical applications.

  • PDF

증류탑 제어에 있어서 로바스트 다변수 제어 응용에 관한 연구 (On the Application af Robust Multivariable Controller to Distillation Column)

  • 고재욱;이원규
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 1986년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 17-18 Oct. 1986
    • /
    • pp.238-243
    • /
    • 1986
  • Distillation columns are widely used in almost every chemical plant. The use of multivariable control for such units is attractive because of the strong interactions exhibited between outputs and inputs and the desire to control simultaneously both top and bottom products. In this research design of a robust multivariable controller for distillation column was considered; output feedback controller with proportional and integral modes was designed using pole assignment. The transfer function matrix was obtained by fitting the step response realtions between single input double output pairs of variables. This matrix was then converted to linear time invariant state space model by multivariable realization technique. With the proposed multivariable proportional and integral controller applied to the process, the result of the digital computer simulation showed a good performance of asymtotic tracking. The limited experimental performance of this multivariable control was compared with the result from simulation. It was found that the proposed controller performed satisfactorily for the distillation column which separated binary mixture of methanol and water.

  • PDF

주파수 영역에서 다변수 학습제어기의 설계 (Design of multivariable learning controller in frequency domain)

  • 김원철;조진원;이광순
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국내학술편); Seoul National University, Seoul; 20-22 Oct. 1993
    • /
    • pp.760-765
    • /
    • 1993
  • A multivariable learning control is designed in frequency domain. A general to of feedback assisted learning scheme is considered and an inverse model based learning algorithm is derived through convergence analysis in frequency domain. Performance of the proposed control method is evaluated through numerical simulation.

  • PDF

롤편심을 포함한 냉간압연 시스템의 다변수 제어 (Multivariable Control of Cold-Rolling Mills with Roll Eccentricity)

  • 김종식;김승수
    • 대한기계학회논문집A
    • /
    • 제21권3호
    • /
    • pp.502-510
    • /
    • 1997
  • A disturbance rejection controller using eccentricity filtering and LQ control techniques is proposed to alleviate the effecto of major roll eccentricity in multivariable cold-rolling processes. Fundamental problems in multivariable cold-rolling processes such as process time delay inherent in exit thickness measurement and non-stationary characteristics of roll eccentricity signals can be overcome by the proposed control method. The filtered instantaneous estimate of roll eccentricity may be exploited to improve instantaneous estimate of the exit thickness variation based on roll force and roll gap measurements, and a feedforward compensator is augmented as a reference for a gaugemeter thickness estimator. LQ feedback controller is combined with eccentricity filter for the attenuation of the exit thickness variation due to the entry thickness variation. The simulation results show that the roll eccentricity disturbance is significantly eliminated and other disturbances also are attenuated.

Robust output feedback compensator design for multivariable systems

  • Choi, Han-Ho;Yoo, Dong-Sang;Chung, Myung-Jin
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국제학술편); KOEX, Seoul; 22-24 Oct. 1991
    • /
    • pp.1545-1548
    • /
    • 1991
  • In this note, we consider a robust linear shift-invariant feedback compensator design for discrete-time multivariable systems which have both matched and mismatched uncertainties. In order to attack the problem of designing robust compensators guaranteeing uniform ultimate boundedness of every closed-loop system response within a neighborhood of the zero state based solely on the knowledge of the upper norm-bounds of uncertainties, we use an approach which is effective on studying augmented feedback control systems with both mismatched and matched uncertainties. We draw some robust stability conditions using the approach and give an example.

  • PDF

직접식 다변수 정량적 피드백 이론 (Direct multivariable quantitative feedback theory)

  • 박명수;이재원
    • 대한기계학회논문집A
    • /
    • 제22권3호
    • /
    • pp.562-568
    • /
    • 1998
  • During the past three decades, several techniques have been suggested for robust performance design of multivariable systems within the framework of Quantitative Feedback Theory. They are all characterized and limited by the use of loop transmission inversion. A new approach within framework is described which leads to a design tehnique without loop transmission inversion. Complete sequential design algorithms are derived for performance specifications in terms of plant input disturbance, sensitivity, complimentary sensitivity and control effort.

不確實性을 고려한 로보트 매니퓰레이터의 位置 및 速度에 대한 實時間 制御 (Real Time Control for the Position and Velocity of Robot Manipulator With Parameter Uncertainties)

  • 이강두;김경년;한성현;이진;이종년;김휘동
    • 한국해양공학회지
    • /
    • 제9권2호
    • /
    • pp.30-40
    • /
    • 1995
  • In this paper, it is proposed a robust control scheme for real time control of a robot manipulator with parameter uncertainties. The focus of this paper is a new approach of multivariable control schemes for an assembly robot manipulator to achieve the accurate trajectory tracking by joint angles. The proposed control scheme consists of a multivariable feedforward controller and feedback controller. In this control scheme, the feedback controller consists of proportional-derivative type and is designed by the pole placement method. The feedforward controller uses the inverse of the linealized model of robot manipulator dynamics. This feedback controller ensures that each joint enables to track any reference trajectory. The proposed robot controller scheme has a computational efficiency.

  • PDF