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성민상(Seong, Min-Sang),성금길(Sung, Kum-Gil),한영민(Han, Young-Min),최승복(Choi, Seung-Bok),이호근(Lee, Ho-Guen) 한국소음진동공학회 2008 한국소음진동공학회 논문집 Vol.18 No.3
This paper presents vibration control performances of a commercial magnetorheological(MR) suspension via new control strategy considering hysteresis of the field-dependent damping force of MR damper. A commercial MR damper which is applicable to high class passenger vehicle is adopted and its field-dependent damping force is experimentally evaluated. Preisach hysteresis model for the MR damper is identified using experimental first order descending(FOD) curves. Then, a feed-forward compensation strategy for the MR damper is formulated and integrated with a linear quadratic regulation(LQR) feedback controller for the suspension system. Control performances of the proposed control strategy for the MR suspension is experimentally evaluated with quarter vehicle test facility.
성민상(Seong, Min-Sang),임승구(Lim, Seung-Gu),최승복(Choi, Seung-Bok),김철호(Kim, Cheol-Ho),우제관(Woo, Je-Kwan) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.11
This paper presents design and performance evaluation of magnetorheological(MR) damper for integrated isolation mount. The MR damper needs two functions for the integrated isolation mount. The one is vibration absorption and the other is isolation of vibration transmission. For vibration absorption, the MR damper requires wide damping force range. And for isolation of vibration transmission, the friction of MR damper needs to be eliminated. In order to achieve this goal, a novel type of MR damper is originally designed in this work. Subsequently, the MR damper is mathematically modeled and its damping force characteristics are evaluated. In addition, the vibration control performance of the MR damper associated with the stage mass is evaluated. From the result, this paper evaluates the performance of MR damper for integrated isolation mount.
성민상(Min-Sang Seong),최승복(Seung-Bok Choi),김철호(Cheol-Ho Kim),이홍기(Hong Ki Lee),백재호(Jae Ho Baek),한현희(Hyun Hee Han) 한국소음진동공학회 2010 한국소음진동공학회 학술대회논문집 Vol.2010 No.10
This paper presents experimental performance evaluation of a magnetorheological (MR) damper for integrated isolation mount for ultra-precision manufacturing system. The vibration sources of the ultra-precision manufacturing system can be classified as follows: the one is the environmental vibration from the floor and the other is the transient vibration occurred from stage moving. The transient vibration occurred from the stage moving has serious adverse effect to the process because the vibration scale is quite larger than other vibrations. Therefore in this research, a semi-active MR damper, which can control the transient vibration, is adopted. Also the stage needs to be isolated from tiny vibrations from the floor. For this purpose, a dryfrictionless MR damper is required. In order to achieve this goal, a novel type of MR damper is originally designed and manufactured in this work. Subsequently, the damping force characteristics of MR damper are evaluated by simulation and experiment. In addition, the vibration control performance of the MR damper associated with the stage mass is evaluated.
성민상(Seong, Min-Sang),하성훈(Ha, Sung-Hun),구오흥(Nguyen, Quoc-Hung),최승복(Choi, Seung-Bok) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.7
This paper proposes a new method for dynamic modeling of electrorheological(ER) damper considering fluid compressibility. After describing configuration and operating principle of the ER damper, a quasi-static modeling of the ER damper is conducted on the basis of Bingham model of ER fluid. Subsequently, the dynamic model for describing the ER damper considering compressibility of ER fluid and gas chamber is obtained using the lumped parameter method. This method includes dynamic motions of annular duct, upper chamber, lower chamber and connecting pipe. The hysteresis behavior of the ER damper is evaluated through computer simulations and compared with experimental results. In addition, the hysteresis behavior due to the compressibility of ER fluid and gas chamber is investigated through computer simulations.
MR 댐퍼를 이용한 반도체 장비용 마운트 시스템의 성능 평가
성민상(Min-Sang Seong),최승복(Seung-Bok Choi),김철호(Cheol-Ho Kim) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
This paper presents performance evaluation of the magnetorheological (MR) damper designed for the semiconductor equipment mount system. In order to achieve this goal, a new type of MR damper is designed, modeled and manufactured. Its damping force characteristic is also experimentally evaluated. The mechanical model of semiconductor equipment with mount system is then derived by considering moving stage. A skyhook control algorithm with various control gains are designed for vibration control. In order to evaluate the effectiveness of the proposed control system, the simulation model is formulated by integrating the stage model with the proposed MR damper. Vibration control responses of the stage system such as vertical velocity are evaluated under impulse exciting conditions.