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풍력터빈 드라이브트레인의 동특성 해석을 위한 모델링 기법
임동수(Dongsoo Lim),이승규(Seungkyu Lee),양보석(Bosuk Yang) 한국소음진동공학회 2012 한국소음진동공학회 학술대회논문집 Vol.2012 No.10
Wind turbine industry is booming and spending a lot on research for improving the performance of its present machines and increasing their capacity. Wind turbine requires service life of about 20 years and each components of wind turbine requires high durability, because installation and maintenance costs are more expensive than generated electricity by wind-turbine. So the design of wind turbine must be verified in various condition before production step. For this work, high reliability model for analysis is required. Drivetrain model is modeled by multibody dynamic modeling method. The model constituted with rotor blades, hub, main shaft, gear box, high speed shaft and generator. Natural frequency and torsional stiffness of drivetrain are calculated and analyzed.
기어 정렬불량에 의한 전류, 진동 및 음향방출 신호의 비교 분석
구동식(DongSik Gu),이정환(JeongHwan Lee),김병수(ByeongSu Kim),양보석(BoSuk Yang),최병근(ByeongKeun Choi) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
To detect the failures in machine, the signals of current, vibration and acoustic emission are widely used in industry. And unexpected failures of gears are not only extremely damaging but also lead to economic losses. In this paper, to detect the misalignment occurred at between two gears in gearboxes, the signals of current, vibration and AE were measured at gearbox and motor power line. FFT(Fast Fourier Transform) was used for current and vibration signal analysis to find gear failure frequency. Especially, the envelop analysis and wavelet transform were applied for AE signal. Therefore, compared with the results of three kinds of signal, the possibility of earily detection by AE is identified or checked.
류성원(Sungwon Ryu),이종석(Jongseok Lee),강태호(Teaho Kang),백운경(Woonkyung Baek),양보석(Bosuk Yang) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2
This study is about the effect of time delay of damping force to a quarter-car vibration response. A high-performance magneto-rheological damper and a current driver were used to establish an artificial time delay of the damping force. A limit value of time delay of a damping force that does not aggravate the sprung mass vibration was suggested from the experiments using a quarter simulator.