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회전축계의 진동제어용 ER 유체 댐퍼의 설계 및 반능동 비례제어
임승철,채정재,박상민 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-
This paper is concerned with the design and application of an Electro-Rheological(ER) fluid damper to suppress vibration of rotor systems. The example system at hand is flexible with a slender shaft and a thin disk, being su pported by two ball bearings. In addition, to investigate the system performances also in the high speed range, the driving torque is made to transmit through a speed increasing gear train. Along with the experiments, to predict and compare the ER damper effect, the rotor system is simulated as to its free and forced vibration characteristics. Such simulations are done by means of a finite element analysis code, which includes the mathematical model of the designed ER damper.
임승철(Lim, Seung-Chul),채정재(Chae, Jeong-Jae),박상민(Park, Sang-Min),윤은규(Yun, Eun-Gyu) 한국소음진동공학회 2002 한국소음진동공학회 논문집 Vol.12 No.5
This paper concerns the design and application of an electro-rheological (ER) fluid damper to semiactive vibration control of rotor systems. In particular, the system under present study is constructed structurally flexible in order to explore multiple critical speeds within operation range. To this end, the dynamic models of the proposed ER damper and its associated amplifier are derived in the first place. Subsequently entire rotor system model is assembled along with the dynamics of the end effector based on a finite element method enabling prediction as to its free and forced vibration characteristics. Next, an artificial intelligent (AI) feedback controller is synthesized taking into account the peculiarity of Coulomb damping effect in rotor applications. Finally, computational and experimental results are presented including model validation and control performances. In practice, such an AI control proved effective whether the spin speed was either before or after critical speeds.