• 제목/요약/키워드: Regulating Control

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Nonlinear sliding mode robustness control of Axial Electro-Magnetic suspension system (1축 자기 부상 장치의 비선형 슬라이딩 모드 강인 제어)

  • 고유석;송창섭;이강원
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.10a
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    • pp.474-477
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    • 1995
  • In this paper, the nonlinear model of axial electro-magnetic suspension(EMS) system is presented. The characteristic of attracyion force is analyzed by FEM. Some simulation is given to compare the sliding mode control based on the input-output linearization with the classical linear control using Taylor approximation. Real result of regulating control, transient response comparison, and robustness control with disturbance using the sliding mode method is presented.

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Optimal Control of Speed Regulating Systems (속도제어를 대상으로 하는 계통의 최적제어)

  • 양흥석;이종호
    • 전기의세계
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    • v.28 no.2
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    • pp.55-60
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    • 1979
  • In this paper, a new method of the optimal control of the regulator and tracking control problem concerning the dimension of the velocity is derived and applied for the second order plant. The output position, output velocity and the control effort are plottcd with time applying analog computer simulation. And it is compared with the output of the ordinary optimal control law in case the reference input is given by velocity function, and studied about the gain of this method.

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A Study on the Sliding Mode Control of Nonlinear Systems (비선형 시스템의 슬라이딩 보드 제어에 관한 연구)

  • 이태봉;박윤열;한상수
    • Journal of the Korean Institute of Telematics and Electronics B
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    • v.31B no.5
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    • pp.58-64
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    • 1994
  • In this paper, a robust control scheme of a nonlinear system with norm bounded uncertainty is studied. The proposed algorithm is based on variable structure systems (VSS) theory. the sliding mode which is robust to plant uncertainty and disturbances is obtained by regulating a sliding surface equation. This VSS control law can improve the robustness of control systems by adjusting the minimum reaching velocity in a reaching phase. A numerical example is given to verify the effectiveness of the control law.

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Optimization of LQR method for the active control of seismically excited structures

  • Moghaddasie, Behrang;Jalaeefar, Ali
    • Smart Structures and Systems
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    • v.23 no.3
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    • pp.243-261
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    • 2019
  • This paper introduces an appropriate technique to estimate the weighting matrices used in the linear quadratic regulator (LQR) method for active structural control. For this purpose, a parameter is defined to regulate the relationship between the structural energy and control force. The optimum value of the regulating parameter, is determined for single degree of freedom (SDOF) systems under seismic excitations. In addition, the suggested technique is generalized for multiple degrees of freedom (MDOF) active control systems. Numerical examples demonstrate the robustness of the proposed method for controlled buildings under a wide range of seismic excitations.

Adaptive Control of a Nonholonomic Mobile Robot with Parametric Uncertainty (불확실한 파라미터를 갖는 비홀로노믹 이동로봇의 적응제어)

  • Baik, Jong-Ik;Yun, Tae-Ung
    • Proceedings of the KIEE Conference
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    • 2003.11b
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    • pp.15-18
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    • 2003
  • This paper presents an adaptive control scheme for parking or regulating a nonholonomic mobile robot of an unicycle type with parameter uncertainty. The kinematics can be described with Brockett's nonholonomic integrator. The control law is designed in cylindrical coordinates together with the estimation law for the uncertain parameters such that the controlled signals converge to zero while guaranteeing the boundedness of the estimation errors. The effectiveness of the proposed scheme is demonstrated using simulations.

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Modeling and Control of integrated Engine Plant

  • Nakajima, Takayuki;Zhang, Feifei;Ito, Masanori;Mishima, Kiyoshi
    • 제어로봇시스템학회:학술대회논문집
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    • 2005.06a
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    • pp.830-833
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    • 2005
  • The diversification of the regulating system was promoted with the development of the computer technology. On the other hand, environmental problems and the energy conservation problem are being valued as for needs of the society. Our research was able to be achieved in such a situation.

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Feedback Linearization for the Looper System of Hot Strip Mills

  • Hwang, I-Cheol;Kim, Seong-Bae
    • 제어로봇시스템학회:학술대회논문집
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    • 2002.10a
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    • pp.56.5-56
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    • 2002
  • This paper studies on the feedback linearization of the looper system for hot strip mills, where the looper system plays an important role in regulating the strip tension. Firstly, nonlinear dynamic equations of the looper system are simply introduced. Secondly, using the static feedback linearization algorithm, a linear model of the looper system is obtained, of which usefulness is validated from comparison between the linear model and the nonlinear model, and design of LQI(Linear Ouadratic Integral optimal control) and ILQ (Inverse Linear Quadratic optimal control) looper control systems. In result, it is shown that the linear looper model by the feedback linearization well describes nonlin...

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Control techniques for improving response of the AVR (AVR의 응답속도개선을 위한 제어기법에 관한 연구)

  • Lee, Hyung-ki;Kim, Song-Hyun;Kim, Hyun-soo;Kim, Gi-ryang;Kim, Gwan-Hyung
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.11
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    • pp.2534-2539
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    • 2015
  • Method for regulating voltage using a generator voltage regulating device (AVR) is divided in an existing analog system and a digital replacement. Typically, to adjust the voltage by using a brushless excitation system of the type to be reduced for a voltage change under all. The control method of the AVR as a PID (proportional-integral-differential) control method is widely used. However, the control scheme is to reduce the transient response of the control parameters of the controller to the control object. Therefore, if the control target should change, there is a problem, reset the parameters of the controller again. In this study, without having to reset the parameters of the controller for the parameter variations to be controlled iPID (intelligent PID) using a controller designed to obtain a generator AVR system voltage variation is small in response to full load is applied to and through simulations and experiments improved transient response.

Placement of actuator for efficient modal control (효율적 모우드 제어를 위한 구동기 위치 결정법)

  • 노현석;박영진
    • 제어로봇시스템학회:학술대회논문집
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    • 1993.10a
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    • pp.47-51
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    • 1993
  • A method of finding the optimal actuator location for efficient control of the modes of interest is presented. The proposed approach relies on certain quantitive measure of degree of controllability based on the controllability grammian. This measure proves to be useful for regulating problem of the undamped system and can be extended to cover the tracking problem of the viscous damped system. The example of the uniform cantilever beam is given to verify the effectiveness of the method.

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A Study for Dynamic Positioning Control of Floating Platform(I)- Numerical Simyulation by a Servo System Design Method - (부유식 구조물의 동위치제어에 관한 연구( I )-서보계 구성법에 의한 수치시물레이션-)

  • 김성근;유휘룡;김상봉
    • Journal of Ocean Engineering and Technology
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    • v.7 no.2
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    • pp.79-90
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    • 1993
  • A design method of DPS control algorithm for adpting rotable thruster is introduced by applying servo system design method and the control algorithm is evaluated on the basis of the results of computer simulations performed for a semi-submersible 2-lower hull 8-column type platform. It is observed from the simulation results that position error due to the irregular drifting forces becomes zero after very short regulating time and dynamic positioning system is robust in spite of random disturbance.

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