a Semi-Active Control Policy to Reduce the Occurrence and Severity of End-Stop Impacts in a Suspension Seat with AN Electrorheological Fluid Damper
a Semi-Active Control Policy to Reduce the Occurrence and Severity of End-Stop Impacts in a Suspension Seat with AN Electrorheological Fluid Damper
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DOI：
10.1006/jsvi.1996.0901
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发表时间：
1997-06
影响因子：
4.7
通讯作者：
Xuting Wu;M. Griffin
中科院分区：
文献类型：
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作者：
Xuting Wu;M. Griffin
开发了一种半主动开关控制策略，以降低由冲击或高幅度振动引起的悬架座椅末端停止冲击的严重程度。采用电流变阻尼器来实现所需的两种状态的减振。在正弦输入运动的情况下，研究了自由行程(即悬架阻尼器低阻尼段的相对位移)和开启状态的阻尼力对端停碰撞的影响。研究发现，较短的自由行程和较高的开启状态阻尼都减少了末端停止碰撞的发生及其严重程度。用不同输入幅值的随机信号对控制策略进行了测试。开关控制策略改善了座椅悬架的性能，否则在高幅值输入时会发生末端停止碰撞，而在低幅值输入时不会导致较差的隔振。结果表明，在稳态隔振和端停冲击减振之间可以取得较好的折衷。
A semi-active on-off control policy has been developed to reduce the severity of suspension seat end-stop impacts caused by shocks or high magnitude vibration. An electrorheological fluid damper was used to realize the required two-state damping. The effects of the free travel (i.e., the relative displacement within which the suspension damper has low damping) and the on-state damping on end-stop impacts were investigated with a sinusoidal input motion. It was found that both a shorter free travel and higher on-state damping reduced both the occurrence of end-stop impacts and their severity. The control policy was also tested with a random signal at different input magnitudes. The on-off control policy improved the performance of the seat suspension when end-stop impacts would otherwise occur with high magnitude inputs, without causing poor vibration isolation with low magnitude inputs. It is concluded that a successful compromise can be achieved between steady vibration isolation and end-stop impact reduction.