One-dimensional distributed modal sensors and the active modal control for planar structures
One-dimensional distributed modal sensors and the active modal control for planar structures
复制标题
一维分布式模态传感器与平面结构的主动模态控制
DOI：
10.1121/1.423271
复制
发表时间：
1998
影响因子：
2.4
通讯作者：
N. J. Fergusson
中科院分区：
文献类型：
--
作者：
N. Tanaka;Y. Kikushima;N. J. Fergusson
本文讨论了用于结构振动模态提取的分布参数传感器及其主动模态控制。与传统的点传感器如加速度计或位移传感器相比，分布参数传感器上级点传感器，只要它们被适当地设计。首先，本文概述了传统的点传感器模态滤波方法，并列举了它们存在的问题。针对基于点传感器的模态滤波方法的不足，提出了一种基于分布参数PVDF薄膜传感器的模态滤波方法。本文首先讨论了使用二维分布式传感器的模态滤波的设计方法。然后，考虑到传感器的适用性，使用一维传感器的模态滤波的设计过程中，被澄清的一维模态传感器的数量，位置和成形功能。此外，使用一维传感器的模态滤波被发现是适用于二维结构受到任何“经典”的边界条件。实验结果验证了所需的模态滤波的能力，为孤立和退化的结构模式。最后，使用模态传感器，主动模态控制的实验进行，显示了显着的抑制目标模式，而不会导致控制系统的不稳定性。
This paper discusses distributed parameter sensors designed to extract vibration modes of a structure, as well as its active modal control. Compared to conventional point sensors such as accelerometers or displacement sensors, the distributed parameter sensors are superior to point sensors provided that they are properly designed. First, this paper overviews a conventional modal filter method using point sensors, and enumerates the problems they possess. To overcome the drawbacks of the point sensor-based modal filtering, a novel modal filtering technique based upon distributed parameter PVDF film sensors is proposed. This paper begins by discussing a design methodology for modal filtering using two-dimensional distributed sensors. Then, taking into consideration the applicability of the sensors, a design procedure for modal filtering using one-dimensional sensors is presented, the number, location, and shaping functions for the one-dimensional modal sensors being clarified. Furthermore, the modal filtering using the one-dimensional sensors is found to be applicable for two-dimensional structures subject to any “classical” boundary condition. Experimental results verify the capability of the desired modal filtering for both isolated and degenerate structural modes. Finally, using the modal sensors, experiments on active modal control are conducted, showing a significant suppression of the targeted mode without causing instability of the control system.