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유전자 알고리즘과 LMI 설계 방법을 이용한 강인 제어기의 설계
이문노(Moonnoh Lee),이홍규(Hong Kyu Lee) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.7
This paper presents a controller design method for a robust control problem with multiple constraints using genetic algorithms and LMI design method. A robust H∞ constraint with loop shaping and pole placement is used to address disturbance attenuation with error limits and desired transient specifications, in spite of the plant uncertainties and disturbances. In addition, a loop gain constraint is considered so as not to enlarge the loop gain unnecessarily. The robust H∞ constraint and pole placement constraint can be expressed in terms of two matrix inequalities and the loop gain constraint can be considered as an objective function so that genetic algorithms can be applied. Accordingly, a robust controller can be obtained by integrating genetic algorithms with LMI approach. The proposed controller design method is applied to a track-following system of an optical disk drive and is evaluated through simulation results.
이문노(Lee, Moon-Noh),진경복(Jin, Kyoung-Bog),이종극(Lee, Jong-KeuK) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.5
In this paper, we present a schematic method estimating the tracking vibration quantity occurring in the track-following system of an optical recording device. A tracking loop gain adjustment algorithm is introduced to estimate accurately the tracking vibration quantity in spite of the uncertainties of the tracking actuator, Accordingly, the tracking vibration quantity can be estimated from the tracking error, the controller output, the nominal actuator model, and a compensated gain. An optimal tracking controller can be designed from a minimum tracking open-loop gain calculated by the estimated tracking vibration quantity The proposed vibration quantity estimation and controller design method are applied to the track-following system of an optical recording device and are evaluated through the experimental result.??椀?????㈑I?敲???摩??
속도 성분의 진동 외란이 있는 미동 탐색 제어 시스템의 강인 제어기 설계 방법
이문노(Lee, Moon-Noh),신진호(Shin, Jin-Ho),김성우(Kim, Seong-Woo) 한국소음진동공학회 2007 한국소음진동공학회 논문집 Vol.17 No.9
This paper present a robust controller design method based on the estimation of velocity disturbance to construct a robust fine seek control system. A loop gain adjustment algorithm is introduced to accurately estimate the velocity disturbance in spite of the uncertainties of fine actuator. A weighting function is optimally selected from a minimum fine seek open-loop gain, calculated by estimating the velocity disturbance. A robust fine seek controller is designed by considering a robust $H_{\infty}$ control problem using the weighting function. The proposed controller design method is applied to the fine seek control system of a DVD rewritable drive and is evaluated through the experimental results.
이문노(Lee, Moon-Noh),진경복(Jin, Kyoung-Bog) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.3
In this paper, we provide a robust track-following controller design method for the stable coarse seek control. Due to the inaccurate velocity control during a coarse seek, the shake of fine actuator is generated and thus a gain-up track-following control is required to complete stably the coarse seek. To this end, a loop gain adjustment algorithm is introduced to estimate accurately the shake of fine actuator. A weighting function can be properly selected from a minimum tracking gain-up open-loop gain, calculated from the estimated shake quantity of fine actuator. A robust tracking gain-up controller is designed by considering a robust $H_{\infty}$ control problem using the weighting function. The proposed design method is applied to the coarse seek control system of an optical rewritable drive and is evaluated through the experimental results.
유전자 알고리즘을 이용한 다중 제한 조건을 만족하는 강인 트랙 추종 제어
이문노(Lee, Moon-Noh),이홍규(Lee, Hong-Kyu),진경복(Jin, Kyoung-Bog) 한국소음진동공학회 2012 한국소음진동공학회 논문집 Vol.22 No.3
This paper presents a design method of a robust tracking controller satisfying multiple constraints using genetic algorithm. A robust $H_{\infty}$ constraint with loop shaping is used to address disturbance attenuation with error limits and a loop gain constraint is considered so as not to enlarge the tracking loop gain and bandwidth unnecessarily. The robust $H_{\infty}$ constraint is expressed by a matrix inequality and the loop gain constraint is considered as an objective function so that genetic algorithm can be applied. Finally, a robust tracking controller can be obtained by integrating genetic algorithm with LMI approach. The proposed tracking controller design method is applied to the track-following system of an optical DVD recording drive and is evaluated through the experimental results.
트랙킹 액추에이터의 진동 억제를 위한 트랙킹 Gain-up 제어기 설계
이문노(Lee, Moonnoh),진경복(Jin, Kyoung Bog) 한국소음진동공학회 2013 한국소음진동공학회 논문집 Vol.23 No.4
This paper presents a tracking gain-up controller design method to control effectively the vibration of tracking actuator caused by external shocks and remaining velocity after seek control. A pole placement constraint is considered to assure a desired transient response against the vibration of tracking actuator. A loop gain-up constraint is introduced to hold the tracking gain-up loop gain and control bandwidth within allowable bounds. The pole placement constraint is expressed by a matrix inequality and the loop gain-up constraint is considered as an objective function so that genetic algorithm can be applied. Finally, a tracking gain-up controller is obtained by integrating a genetic algorithm with LMI design approach. The proposed tracking gain-up controller design method is applied to the track-following system of a DVD recording device and its effectiveness is evaluated through the experimental results.
PSO 알고리즘을 이용한 트랙킹 진동량 추정과 최적 제어기 설계
이문노(Moonnoh Lee) 한국소음진동공학회 2021 한국소음진동공학회 논문집 Vol.31 No.3
This paper presents a method for estimating the vibration quantity and designing a controller using a PSO algorithm for controlling the uncertainties of tracking actuator and disk reflectivity. After estimating the vibration quantity of an actual tracking loop through measurement, the proposed method calibrates the estimated vibration quantity by additionally reflecting the effect of the uncertainties. A minimum tracking loop gain can be appropriately modeled using the estimated vibration quantity. It can be applied to an H<SUB>∞</SUB> objective function to efficiently attenuate the tracking vibration and also to an objective function that prevents the tracking loop gain from becoming larger than necessary. An optimal tracking controller can be designed by minimizing the complementary objective functions using a PSO algorithm. The proposed estimation and design method is applied to a DVD track-following system and verified experimentally.
유전자 알고리듬을 이용한 강인 미동 탐색 제어기의 설계
이문노(Moonnoh Lee),진경복(Kyoung Bog Jin) 한국소음진동공학회 2015 한국소음진동공학회 논문집 Vol.25 No.5
This paper deals with a robust fine seek controller design problem with multiple constraints using a genetic algorithm. A robust H∞ constraint is introduced to attenuate effectively velocity disturbance caused by the eccentric rotation of the disk. A weighting function is optimally selected based on the estimation of velocity disturbance and the estimated minimum velocity loop gain. A robust velocity loop constraint is considered to minimize the variances of the velocity loop gain and bandwidth against the uncertainties of fine actuator. Finally, a robust fine seek controller is obtained by solving a genetic algorithm with an LMI condition and an appropriate objective function. The proposed controller design method is applied to the fine seek control system of a DVD recording device and is evaluated through the experimental results.