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토크 변동조건에서의 유성기어세트 동적 거동 해석 모델링에 대한 연구
이현구(Hyun Ku Lee),김무석(Moo Suk Kim),홍사만(Sa Man Hong),유동규(Dong Kyu Yoo),아멧 칼만(Ahmet Kahraman),데이빗 탈봇(David Talbot) 한국소음진동공학회 2019 한국소음진동공학회 논문집 Vol.29 No.4
In this paper, to reduce planetary gear noise under the neutral control condition, a dynamic analysis model for multi-stage planetary gear trains of the HMC 6th speed automatic transmissions under a torque fluctuations condition is proposed. The natural frequencies of its system are computed by solving the corresponding eigenvalue problem. Moreover, some forced torque fluctuation response to the planetary gear system is applied to check its influence during neutral control. By undertaking some parameter studies for analysis modeling, an underdrive brake torque fluctuation and underdrive hub inertia are observed to be the most effective factors of the HMC 6th speed automatic transmission’s planetary gear noise under the neutral control condition. To reduce neutral control planetary gear noise, the underdrive torque fluctuation should be reduced whereas underdrive hub inertia should be increased. However, every transmission has some torque fluctuations caused by the valve body control response and friction component characteristic and those also have some manufacturing quality distributions. Therefore, control component inertia is an important item in the neutral control condition. To adapt the neutral control to a next-generation transmission, its control component inertia should be above a certain value.