On the Isolation Properties of Semiactive Dampers
On the Isolation Properties of Semiactive Dampers
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DOI：
10.1177/107754639900500204
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发表时间：
1999-03
影响因子：
2.8
通讯作者：
M. Ahmadian
中科院分区：
文献类型：
--
作者：
M. Ahmadian
本研究的主要目的是评估和更好地了解半主动悬架的隔振性能。具体来说，这项研究将回答的问题，为什么半主动阻尼器能够隔离频率远低于被动阻尼器，即使他们不增加任何能量的系统。一个单一的悬架模型是用来推导和分析评估被动和半主动阻尼器的传递率特性。结果表明，半主动阻尼器的隔震频率范围和传递率幅值是阻尼比ε的函数。相反，被动阻尼器的隔振频率范围完全与阻尼器无关。此外，结果表明，足够大的阻尼器，半主动阻尼器能够提供在所有频率的隔离。此功能适用于许多应用，特别是对于不能承受上电或掉电时的任何过冲，但在正常工作期间必须具有良好隔离的敏感机械。被动悬架仅提供两个方面中的一个，而半主动悬架提供两个方面。
The primary purpose of this study is to evaluate and better understand the isolation properties of semiactive suspensions. Specifically, this study will answer the question regarding why semiactive dampers are able to isolate at frequencies well below those for passive dampers, even though they do not add any energy to the system. A single suspension model is used to derive and analytically evaluate the transmissibility properties of passive and semiactive dampers. The results show that for semiactive dampers, the frequency range of isolation and the transmissibility amplitude are functions of ξ, the damping ratio. In contrast, the isolation frequency range for passive dampers is completely independent of ξ. Furthermore, the results show that for sufficiently large ξ, semiactive dampers are able to provide isolation at all frequencies. This feature is useful for many applications, particularly for sensitive machinery that cannot tolerate any overshoot in power- up or power-down, and yet must have good isolation during normal operation. Passive suspensions offer only one of the two aspects, whereas semiactive suspensions offer both.