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Continuous Control of Modes of Vibration

振动模式的连续控制

基本信息

批准号：
01460124
负责人：
OHNO Shinichi
金额：
$ 4.16万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-01460124/
关键词：
Vibration Control Vibration of Continuous System Mode of Vibration

项目摘要

A method was devised to shift the position of a node of the structural vibration along a designated path on the structure by applying controlled multiple exciting forces.This method is based on the following idea. Assume that we take three points 1, 2 and 3 on the structure, apply two exciting forces at point 1 and 2 and observe the vibration at point 3. If the vibration of point 3 caused by the force applied at point 1 and the vibration of the point 3 caused by forceapplied at point 2 are the same in amplitude and opposite in phase, the vibration at point 3 will be stopped as a result of superposition. Then, if we can shift the position of point 3 continually by controlling exciting forces, a node will move along a path on the structure. If we need to stop the vibration of a particular point on the structure, we can simply allocate point 3 there.First, a theory was derived to stop the vibration of a designated point on the structure. Experiments were made to test the theory using a beam simply supported at both ends by two exciters. Then, a theory was derived to shift the position of a node by controlling amplitude ratio, frequency and phase of exciting forces. Experiments were made to test the theory under two control conditions.

提出了一种通过施加受控的多个激振力来使结构振动节点沿着指定路径移动的方法。假设我们在结构上取三个点1、2和3，在点1和2处施加两个激振力，观察点3处的振动。如果由施加在点1处的力引起的点3的振动和由施加在点2处的力引起的点3的振动振幅相同且相位相反，则作为叠加的结果，点3处的振动将停止。然后，如果我们可以通过控制激励力来连续地移动点3的位置，则节点将沿着结构上的路径沿着移动。如果我们需要停止结构上特定点的振动，我们可以简单地将点3分配在那里。首先，推导出停止结构上指定点的振动的理论。用两端简支两个激励器的梁进行了实验验证。在此基础上，提出了通过控制激振力的幅值比、频率和相位来改变节点位置的理论。在两种控制条件下进行了实验验证。