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엑츄에이터 흔들림 제어를 위한 트랙킹 Gain-Up 제어기 설계
진경복(Kyoung Bog Jin),이문노(Moonnoh Lee) 제어로봇시스템학회 2009 제어·로봇·시스템학회 논문지 Vol.15 No.10
In this paper, we deal with a tracking gain-up controller design problem to control effectively the shake of tracking actuator after a track seek. A minimum tracking gain-up open-loop gain can be calculated by estimating the shake of tracking actuator and a desired transient specification is considered to diminish effectively the shake of actuator. A tracking gain-up controller is designed by considering a robust H∞ control problem with a regional stability constraint. The proposed tracking gain-up controller design method is applied to the track-following system of a DVD recording device and is evaluated through the experimental results.
AC Servo Motor와 Ball screw를 이용한 정밀 위치제어시스템의 기계적 특성 분석 및 개선
고수창,진경복,Ko, Su-Chang,Jin, Kyoung-Bog 한국반도체디스플레이기술학회 2007 반도체디스플레이기술학회지 Vol.6 No.1
Effect of coulomb friction and backlash on the single loop position control has been studied for the precision position control. We have showed the limit cycle on the single loop system which used a ball screw that had the backlash. Also, we have made an inner loop with a classical velocity and torque controller which was forcing the current of d axis to be zero by using a permanent-magnet synchronous motor and composed the outer loop with linear encoder for sensing a position of the loader. Also, we have used least squares fit(LSF) observer for reducing noise when we got velocity from position outputs. We have shown a good result by using the dual loop through simulation and experiment.
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??
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.
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.