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시변 스위칭 함수를 이용한 가변구조제어계의 도달기간 제거방법
곽군평,주형민 창원대학교 산업기술연구소 2001 産技硏論文集 Vol.15 No.-
본 논문은 시변 스위칭함수를 이용하여 가변구조제어계의 단점인 도달기간을 제거하는 새로운 방법을 제시한다. 제시된 기법에 의해 전체 제어기간동안의 도달기간이 제거되었다. 효과적인 브러시리스 DC모타의 속도제어를 위해 제안된 시변스위칭 함수를 사용하여 속도 제어기를 설계하였다. This paper presents a new method for removing reaching phase in variable structure control systems using time varying switching function. By proposed method, during the entire control process reaching phase is removed. For effective speed control of trapezoidal type brushless DC motor, a time varying switching function based speed controller is developed as illustration.
채터링 제거를 위한 유도 전동기의 슬라이딩 모드 제어기 설계
郭君平,安鎬均,金星邑 창원대학교 공작기계기술연구센터 1999 연구업적집 Vol.1 No.1
본 논문에서는 유도 전동기의 슬라이딩 모드 제어기가 설계되었다. 슬라이딩 모드 제어기의 단점인 채터링 현상을 제거하기 위해 연속치 제어입력이 제안되었으며 제안된 기법으로 고속 마이크로 프로세서인 DSP를 이용한 유도전동기의 속도제어를 보였다. 슬라이딩 모드하에서의 유도 전동기는 전동기의 각속도가 지정된 궤적을 추종하도록 동작한다. 실험 결과를 통해 제안된 방법의 유용성을 보였다. This paper presents an improved sliding mode controller design for induction motor. In place of the discontinuous control inputs. continuous inputs are proposed in order to remove the undesirable chattering phenomena. which represent major drawbacks of the sliding mode controller. The design strategy is illustrated with a microprocessor based implementation for the velocity control of an induction motor. An induction motor is operated under sliding mode control such that the motor angular velocity follows a predetermined trajectory. The experimental results confirm the validity of the proposed method.
이범,곽군평 麗水水産大學校産業技術硏究所 1998 産業基術硏究所 論文集 Vol.7 No.-
This paper presents a new approach to remove the undesirable chattering phenomina, which are major drawbacks of the variable structure controller. By proposed switching functions control inputs are continuous and during the entire control process chattering effects are removed. In addition, responses of the system with this approach have a good performances in the presence of parameter variations and disturbances. Numerical example is discussed as illustration. Finally, for effective position control of trapezoidal type brushless DC motor, a sliding mode based position controller is developed.
시변스위칭함수를 이용한 슬라이딩 모드 제어기의 도달기간 제거에 관한 연구
안호균,곽군평 國立 昌原大學校 産業技術硏究所 1998 産技硏論文集 Vol.12 No.-
This paper presents the design of sliding mode Controller for removing reaching phase using time varying switching functions. For removing reaching phase in VSCS (Variable Structure Control Systems), a time varying switching surface is proposed to achieve the sliding mode during the entire control process. Numerical example is presented to demonstrate the effects of this approach.
선형 다변수 서보 메카니즘에 대한 슬라이딩 모드 제어기 설계
곽군평 國立 昌原大學校 産業技術硏究所 1999 産技硏論文集 Vol.13 No.-
This paper presents a new approach to designing a linear multivariable servo mechanism in the presence of disturbances. An observer-based approach is used to consider the disturbances as states of the controlled system. And, the resulting robust controller design for the linear multivariable servo mechanism involves the design of an asymptotic state observer which estimates both actual plant states and the disturbance states, and the design of a linear state feedback controller for the plant. The robust controller makes use of the continuous functions instead of the switching logics to obtain the sliding mode. Consequently, continuous control inputs are obtained to remove the undesirable chattering phenomena.
곽군평,이범 麗水水産大學校産業技術硏究所 1998 産業基術硏究所 論文集 Vol.7 No.-
This paper presents the design of sliding mode Controller for Induction motor. For removing reaching phase in VSCS (Variable Structure Control systems), a time varying switching surface is proposed to achieve the sliding mode during the entire control process. In addition, continuous control input is proposed to remove the undesirable chattering phenominon, which is major drawback of the variable structure controller. in this paper, sliding mode controller for induction motor is presented to demonstrate the effects of this approach.
선형 다변수 서보 메카니즘에 대한 슬라이딩 모드 제어기 설계
이범,곽군평 여수대학교 1998 論文集 Vol.12 No.2
This paper presents a new approach to designing a linear multivariable servo mechanism in the presence of disturbances. An observer-based approach is used to consider the disturbances as states of the controlled system. And, the resulting robust controller design for the linear multivariable servo mechanism involves the design of an asymptotic state observer which estimates both actual plant states and the disturbance states, and the design of a liner state feedback controller for the plant. The robust controller makes use of the continuous functions instead of the switching logics to obtain the sliding mode. Consequently, continuous control inputs are obtained to remove the undesirable chattering phenomena.
Design of $H_{\infty}$ Controller with Different Weighting Functions Using Convex Combination
Kim Min-Chan,Park Seung-Kyu,Kwak Gun-Pyong The Korea Institute of Information and Commucation 2004 Journal of information and communication convergen Vol.2 No.3
In this paper, a combination problem of controllers which are the same type of $H_{\infty}$ controllers designed with different weighting functions. This approach can remove the difficulty in the selection of the weighting functions. As a sub-controller, the Youla type of $H_{\infty}$ controller is used. In the $H_{\infty}$ controller, Youla parameterization is used to minimize $H_{\infty}$ norm of mixed sensitivity function by using polynomial approach. Computer simulation results show the robustness improvement and the performance improvement.