• Title, Summary, Keyword: 안정화 System

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Reactive Power Loadability in Korean Power System (한전 계통에서의 무효전력 부하 평가에 관한 연구)

  • Yoon, Jong-Su;Won, Jong-Ryul;Yoon, Yong-Beum;Jang, Byung-Hoon;Lee, Ki-Sun;Choo, Jin-Boo
    • Proceedings of the KIEE Conference
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    • pp.1472-1474
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    • 1999
  • This paper proposes the estimation method about how much reactive power can be increased or decreased under prescribed bus voltage limits in non-linear reactive power and power flow equations. The static nonlinear reactive power voltage problem can be formulated using a linear resistive(I-V) network with voltage dependent current sources. Linear programming model is derived for finding bounds on reactive power. This method was applied to future Korean power system and proved its effectiveness.

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Identification and Control of Command Panoramic Sight System (조준경안정화시스템의 인식과 제어)

  • Kim, Dae-Woon;Cheon, Soon-Yong
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.44 no.3
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    • pp.14-21
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    • 2007
  • Sight Stabilization system is the control system to preserve Line of Sight for the targets though many nonlinear disturbances and vibrations are generated. In this paper, we identified Stabilization system using RLS algorithm, one of the system identification algorithm and found out the modeling of system. Considering nonlinear operational condition this paper proposes two Knowledge-base controllers - Fuzzy controller, Fuzzy PI Gain Scheduling controller, and simulates the performances of proposed controllers compare with Lead PI controller being used in Sight system of NFIV.

Hardware Implementation of Depth Image Stabilization Method for Efficient Computer Vision System (효율적인 컴퓨터 비전 시스템을 위한 깊이 영상 안정화 방법의 하드웨어 구현)

  • Kim, Geun-Jun;Kang, Bongsoon
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.8
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    • pp.1805-1810
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    • 2015
  • Increasing of depth data accessibility, depth data is used in many researches. Motion recognition of computer vision also widely use depth image. More accuracy motion recognition system needs more stable depth data. But depth sensor has a noise. This noise affect accuracy of the motion recognition system, we should noise suppression. In this paper, we propose using spatial domain and temporal domain stabilization for depth image and makes it hardware IP. We adapted our hardware to floor removing algorithm and verification its effect. we did realtime verification using FPGA and APU. Designed hardware has maximum frequency 202.184MHz.

Kinematic and Image Stabilization of a Two-axis Surveillance System on Ship (선상 2축 감시장비의 기구 및 영상 안정화)

  • Lee, Kyung-Min;Cho, Jae-Hyun;Kim, Ho-Bum;Lyou, Joon
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.49 no.4
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    • pp.55-60
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    • 2012
  • When operating a surveillance system in the maritime environment, its stabilization performance is degraded due to undesirable disturbance motions. For accurate target pointing of a 2-axes surveillance system on shipboard, the kinematic stabilization is first applied, which compensates a deviated motion via coordinate transformations of attitude information. Resultantly, the stabilization error is no longer reduced due to less accuracy of a MEMS sensor and kinematic constraint, leading to introduction of the image stabilization as a complementary function. And for real-time execution of the present dual stabilization scheme, a HILS (Hardware In the Loop Simulation) test bed including 6-dof motion simulator has been constructed, and through the obtained HILS data, it has been confirmed that the stabilization is successfully.

Experimental Verification of Effectiveness of Stabilization Control System for Mobile Surveillance Robot (기동형 경계로봇 안정화 시스템의 실험적 검증)

  • Kim, Sung-Soo;Lee, Dong-Youm;Kwon, Jeong-Joo;Park, Sung-Ho
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.35 no.4
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    • pp.359-365
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    • 2011
  • A mobile surveillance robot is defined as a surveillance robot system that is mounted on a mobile platform and is used to protect public areas such as airports or harbors from invaders. The mobile surveillance robot that is mounted on a mobile platform consists of a gun module, a camera system module, an embedded control system, and AHRS (Attitude and Heading Reference System). It has two axis control systems for controlling its elevation and azimuth. In order to obtain stable images for targeting invaders, this system requires a stabilizer to compensate any disturbance due to vehicle motion. In this study, a virtual model of a mobile surveillance robot has been created and ADAMS/Matlab simulations have been performed to verify the suitability of the proposed stabilization algorithm. Further, the suitability of the stabilization algorithm has also been verified using a mock-up of the mobile surveillance robot and a 6-DOF (Degree Of Freedom) motion simulator.

A Study of Stabilization Loop Design for a Two Axis Gimbal System Using Resolver (리졸버를 이용한 2축 김발 시스템의 공간 안정화 루프 설계에 대한 연구)

  • Kang, Ho-Gyun;Seong, Ki-Jun;Kim, Sung-Un;Yeou, Bo-Yeoun
    • Proceedings of the KIEE Conference
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    • pp.303-304
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    • 2007
  • 항공기, 차량, 유도탄 둥과 같은 동적인 플랫폼에서 표적을 추적하기 위해서 시선을 안정화하는 외부의 추적 루프와 내부의 안정화 루프(또는 속도 루프)가 있고, 또한 표적을 추적하기 전 표적을 지향하고 포착하기 위해 김발을 동체에 대해 일정한 각도로 유지하기 위한 위치 루프도가지고 있다. 일반적으로 안정화 루프는 각속도를 측정하기 위한 검출기로 자이로를 사용하고, 위치 루프는 김발각을 제어하기 위한 위치 검출기를 사용한다. 그러나 안정화 루프에 사용되는 자이로는 루프 성능을 최적으로 하기 위해서 고성능/고가의 자이로가 사용되는 단점이 있다. 따라서 본 논문에서는 위치 루프에 사용되는 위치 센서인 리졸버를 사용하여 고성능/고가의 자이로 센서 없이 안정화 루프를 설계하였고, 리졸버를 사용하여 설계된 안정화 루프가 동적인 플랫폼에 사용될 수 있는지 시뮬레이션 결과와 실험 결과를 통해 분석하였다.

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Stabilzed Control of an Inverted Pendulum Cart System Using the Optimal Regulator (최적 Regulator를 이용한 도립진자 시스템의 안정화 제어)

  • 박영식;최부귀
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.15 no.4
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    • pp.315-323
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    • 1990
  • A design technique of dynamic stabilization controller for the intrinsic unstable inverted pendulum system is introduced. Mathematical modelling with the more complex nonlinearity and the stabilized control theory presented by C.D.Johnson are adapted to this system by using the state-space approach. And the Stabilized controller with the designed optimal regulator type which can be fastly tracked and can be accurately counteracted aginst all effects of the constant distrubances and the parameteric variations is simulated and is implemeted successfully on the microcomputer.

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A Study on Battery Applying Technique for Stability of Satellite Power System (인공위성 전원 안정화를 위한 배터리 적용 기법 연구)

  • Jeon, Hyeon-Jin;Lee, Sangrok;Jeon, Moon-Jin;Lim, Seong-Bin
    • Aerospace Engineering and Technology
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    • v.12 no.2
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    • pp.7-13
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    • 2013
  • Power system in satellite shall produce stable outputs for successful mission accomplishment. However, unstability in overall electrical system is caused in a case where a load having a power profile with high-powered and micro-cycled pulse shape is connected to a satellite power system. In order to resolve this anomaly, "power system stabilization method using a battery" featured with simplicity can be applied, but there is a constraint to operate a battery in its normal operational conditions. In this paper, an effective interface structure for "power system stabilization method using a battery" is suggested and a battery protection algorithm for preventing over-charging and over-discharging is discussed.

Design of Output Feedback Controller for Polynomial Fuzzy Large-Scale System : Sum-of-Square Approach (다항식 퍼지 대규모 시스템의 출력 궤환 제어기 설계 : 제곱합 접근 방법)

  • Kim, Han-Sol;Joo, Young-Hoon;Park, Jin-Bae
    • Journal of the Korean Institute of Intelligent Systems
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    • v.21 no.5
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    • pp.549-554
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    • 2011
  • This paper presents the stabilization method for polynomial fuzzy large-scale system by using output feedback controller. Each sub system of the large-scale system is transformed into polynomial fuzzy model, and then output feedback controller is designed to stabilize the large-scale system. Stabilization condition is derived as sum-of-square (SOS) condition by applying the polynomial Lyapunov function. This condition can be easily solved by SOSTOOLS which is the third party of the MATLAB. From these solutions, output feedback controller gain can be obtained by SOS condition. Finally, a simulation example is presented to illustrate the effectiveness and the suitability of the proposed method.

Determination of the Boundary of Parameters for Stabilization of Truss Structures Stabilized by Cable Tension (장력안정트러스 구조물의 안정화를 위한 매개변수의 범위 결정에 관한 연구)

  • 권택진;한상을;최옥훈
    • Computational Structural Engineering
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    • v.10 no.3
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    • pp.195-202
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    • 1997
  • The charateristics of stabilization for stabilized truss unit-structures with cable and truss are investigated in this paper. This unit system is composed of a central post and eight cables, and is connected by hinge joints, and stabilized by self-equilibrated stress field. As this unit structure itself is a statically closed and stabilized system individually, it can be employed to assemble structures with various configurations. In this study, for stabilization of truss structures stabilized by cable tension, the structural concept of unit structures, the range of various geometrical parameters and the relationship of governing parameters about unit systems are explained.

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