2020 Fiscal Year Final Research Report
A study on performance improvement of centrifugal pendulum vibration absorber
| Project/Area Number |
19K14928
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 20010:Mechanics and mechatronics-related
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| Research Institution | Hosei University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2021-03-31
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| Keywords | 遠心振り子式動吸振器 / ねじり振動 / 駆動系 |
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| Outline of Final Research Achievements |
In a centrifugal pendulum vibration absorber, the pendulum resonates by matching the natural frequency of the pendulum with the frequency of the external force, and a large vibration damping effect is obtained. However, performance deterioration may occur due to manufacturing errors and aging deterioration. Therefore, a design that does not cause a significant deterioration in performance is required even if the resonance point changes due to error or deterioration. Therefore, in order to enable such a robust design, in this study, I focused on the pendulum center of gravity orbit and approached and clarified the relationship between the orbit and vibration damping performance from both theoretical and CAE analysis. In the theory, to clarify the influence of the orbit, the orbit was formulated as an arbitrary orbit represented by a quadratic function. Furthermore, I constructed an actual vehicle model that can obtain the damping effect in the actual vehicle and verified the effect.
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| Free Research Field |
機械力学
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| Academic Significance and Societal Importance of the Research Achievements |
地球温暖化やエネルギー問題に対応するため自動車産業においては省燃費技術の開発が重要な課題となり，パワートレーンにおいてはエンジンの気筒数自体を減らす少気筒化が進んでいる．しかし少気筒化によりエンジンからのトルク変動が大きくなり振動騒音性能は悪化するため安易に少気筒化を進めることはできない．したがってこのトルク変動によるねじり振動を減らす装置の性能を向上させることにより積極的に少気筒化を進めることができ，その結果自動車の省燃費化につながる．本研究はこのねじり振動低減装置である遠心振り子式動吸振器の性能向上に関する研究であり，成果により装置のさらなる普及と燃費向上が見込まれる．
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