セミアクティブダンパによるシートサスペンションの振動低減

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  • Vibration reduction of a seat suspension system using a semi-active type of damper

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<p>The burden of vibration on the passengers of construction machinery and agricultural machinery is great, and long-term exposure to vibration leads to serious problems such as vibration disorders and accidents. Therefore, measures to reduce vibration have been taken by introducing a suspension under the seat. Conventional seat dampers are controlled by fixing the hardness of the seat, so that a harder seat absorbs less shock, but the vibration is quickly controlled. On the other hand, setting the seat hardness softly causes firm displacement and shock absorption, but the vibration does not converge quickly. In other words, the conventional control method does not achieve both shock absorption and quick convergence at the same time. Therefore, in this research, by enclosing a magneto-rheological fluid in the seat suspension and installing a damper that can adaptively change the viscosity according to the input of vibration, it is possible to maintain the damping performance and increase the comfort of the passenger. We verified a semi-active damping method that improves comfort. In this study, two types of semi-active damping methods, ON/OFF control and Fuzzy control, were used for verification.</p>

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