• Title/Summary/Keyword: 관측기설계

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두개의 출력을 갖는 시스템에 대한 well-conditioned 이산관측기의 설계

  • 곽병길
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1996.04a
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    • pp.330-335
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    • 1996
  • The well-conditioned observer design method is extended for two-output systems where observer gains are not determined uniquely with respect to the desired observer poles. Similar to the previous results, this design method makes off-diagonal elements of the observer upper-left submatrix skew-symmetric and simulataneously, places the eigenvalues of the observer matrix widely separated by selecting upper two rows of the observer gain. The proposed design method is evaluated in a spindle-drive example where the load speed is estimated based on motor speed and the armature current.

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DC link Voltage Control of Single Phase Inverter using a State Observer (상태관측기를 이용한 단상 인버터 DC 링크 전압제어)

  • Seo, Joungjin;Sim, Woosik;Jo, Jongmin;Cha, Hanju
    • Proceedings of the KIPE Conference
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    • 2019.07a
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    • pp.481-482
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    • 2019
  • 본 논문에서는 DC 링크 전압을 일정하게 유지하기 위하여 상태관측기를 이용하여 DC 링크 전압의 평균값과 리플 성분을 추출하였다. 이를 바탕으로 전압 제어기를 이용한 인버터의 DC 링크 전압 제어를 설계하였으며, 시뮬레이션으로 구현하였다. 이 시뮬레이션을 통해 전압이 안정되게 제어하는 것을 검증하였다.

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Reduced-order Disturbance Observer based Coordinated Tracking of Uncertain Heterogeneous Multi-Agent Systems (축소 차수 외란 관측기를 이용한 이종 다개체 시스템의 협조 추종 제어)

  • Kim, Jung-Su;Back, Juhoon
    • Journal of Institute of Control, Robotics and Systems
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    • v.20 no.12
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    • pp.1231-1237
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    • 2014
  • This paper proposes a reduced-order disturbance observer based coordinated tracking controller for uncertain heterogeneous multi-agent systems. To this end, first the control problem is converted as a robust control problem. Then, a dynamic coordinated controller is designed based on the recently proposed reduced-order disturbance observer. Simulation results are given to show the effectiveness of the proposed control scheme.

Simulation Modeling of Range and Acceleration Measurement Instruments for Satellite Formation Flying (편대비행 위성용 거리 및 가속도 관측기 시뮬레이션 모델링)

  • Kim, Jeong-Rae
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.33 no.2
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    • pp.75-83
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    • 2005
  • NASA/DLR Gravity Recovery and Climate Experiment (GRACE) mission, which consists of two co-orbiting low altitude satellites, is to measure the Earth gravity field with unprecedented accuracy. Its key instruments include inter-satellite ranging systems and three-axis accelerometers. For the preliminary design and requirements analysis, extensive instrument simulation models are developed. These modeling techniques and orbit-gravity field estimation techniques are described.

RCGA-Based State Observer Design for Container Cranes (컨테이너 크레인을 위한 RCGA기반 상태관측기 설계)

  • Ahn, Jong-Kap;Lee, Yun-Hyun;Ryu, Ki-Tak;Yoo, Heui-Han;So, Myung-Ok
    • Journal of Advanced Marine Engineering and Technology
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    • v.32 no.4
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    • pp.624-629
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    • 2008
  • This paper presents a scheme for designing a state observer for container cranes. If the system is completely observable with a given set of outputs, then it is possible to determine the states that are not directly measured. We consider the reduced-order states observer with only trolley position detection and with trolley position and container angle detection. The gain matrix of the each state observer is adjusted using a RCGAs. A set of simulation works is carried out to demonstrate the effectiveness of the proposed scheme.

Disturbance Control of Induction Motor using Tough Disturbance Cancellation State Observer (외란 상쇄 관측기를 이용한 유도전동기 외란 제어)

  • Kim, Young-Choon;Cho, Moon-Taek
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.7 no.2
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    • pp.131-136
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    • 2006
  • This paper described a robust control of an induction motor using a disturbance cancellation observer of a feedforward control with Matlab simulink. The speed response of conventional PI controller characteristics is affected by variation of load torque disturbance. In this system, the speed control characteristics using a feedforward control toughen about a load torque disturbance.

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A Design of Linear State Observers for Motorized Seat Belt System (전동식 안전벨트 시스템의 선형 상태 관측기 설계)

  • Lee, Kang-Seok;Choi, Chin-chul;Lee, Woo-Taik
    • Transactions of the Korean Society of Automotive Engineers
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    • v.20 no.3
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    • pp.58-66
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    • 2012
  • This paper describes a design and a verification of linear state observers for a motorized seat belt system to estimate state information such as angular velocity and load torque. The motorized seat belt system provides functions to protect passengers and improve passenger's convenience. To realize these functions, sensors which can measure an angular velocity and load torque are needed. By use of the linear state observer, state information can be estimated without sensors. The motorized seat belt system is analysed and represented as a state space model which contains load torque as an augmented state. By the developed state space model, a full and reduced order observer are designed and verified by experiments. The full and reduced order observer are also compared from points of view of execution time and noise robustness.

Robust Fuzzy Observer-Based Output-Feedback Controller for Networked Control Systems (네트워크 제어 시스템의 강인 퍼지 관측기 기반 출력궤환 제어기)

  • Jee, Sung-Chul;Lee, Ho-Jae;Joo, Young-Hoon
    • Journal of the Korean Institute of Intelligent Systems
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    • v.19 no.4
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    • pp.464-469
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    • 2009
  • This paper discusses a robust observer-based output-feedback stabilization of an uncertain Takagi-Sugeno (T-S) fuzzy system in a network. In the networked control system, the input delay occurs inevitably and it is expressed by the Markovian stochastic process. To design robust sampled-data observer-based output-feedback controller, we discretize the T-S fuzzy system and represent as a jump system. Stochastic robust stabilization condition is formulated in terms of linear matrix inequalities.

A Study on the Design of a Nonlinear Speed Controller and a Fuzzy Load Torque Observer for a PM Synchronous Motor (영구자석 동기전동기의 비선형 속도 제어기 및 퍼지토크관측기 설계에 대한 연구)

  • Jung, Jin-Woo
    • The Transactions of the Korean Institute of Power Electronics
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    • v.15 no.4
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    • pp.282-287
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    • 2010
  • This paper proposes a new nonlinear speed controller with a fuzzy load torque observer based on the Takagi-Sugeno fuzzy method for a permanent magnet synchronous motor(PMSM). The LMI conditions are derived for the existence of the proposed nonlinear speed controller and fuzzy load torque observer, and the LMI parameterization to obtain the gain matrices of the controller and observer is given. In this paper, to verify the performance of the proposed nonlinear speed controller and fuzzy load torque observer, and the simulation and experimental results are demonstrated under motor parameter and load torque variations.

Robust $H_\infty$ Output Feedback Control of Descriptor Systems with Parameter Uncertainty and Time dDelay (파라미터 불확실성과 시간지연을 가지는 특이시스템의 견실 $H_\infty$ 출력궤환 제어)

  • 김종해
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.41 no.3
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    • pp.9-16
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    • 2004
  • This paper provides an observer-based Η$\infty$ output feedback controller design method for descriptor systems with time-varying delay by just one LMI(linear matrix inequality) condition. The sufficient condition for the existence of controller and the controller design method are presented by perfect LMI approach which can be solved efficiently by convex optimization. The design procedure involves solving an LMI. Since the obtained condition can be expressed as an LMI form all variables including feedback gain and observer gain can be calculated simultaneously by Schur complement changes of variables, and singular value decomposition. Moreover, The proposed controller design algorithm can be extended to the observer-based robust Η$\infty$ output feedback controller design method for descriptor systems with parameter uncertainty and time delay. An example is given to illustrate the results.