Sensor and actuator placement for modal identification

被引：17
|
作者：
Shih, YT [1 ]
Lee, AC [1 ]
Chen, JH [1 ]
机构：
[1] Natl Chiao Tung Univ, Dept Mech Engn, Taipei, Taiwan
来源：
MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 1998年 / 12卷 / 05期
关键词：
D O I：
10.1006/mssp.1998.0168
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In modal identification, the use of different actuator and sensor locations results in different frequency response functions (FRFs) and consequently affects the modes shown on the FRF plots. This paper presents a method of placing sensors and actuators to obtain reliable measured data for estimating the modal parameters. The method is based on proposed controllability and observability measures for second-order linear systems, which are suitable for identification purposes and have a physical interpretation on the FRF plots. These measures, combined with an objective criterion, provide a method for ranking the effectiveness of alternative actuator and sensor distributions and hence a rational basis for choosing their locations. The method is applied successfully to the selection of actuator and sensor locations for a set of target modes for the structural characterisation of a simulated system. Finally, an iterative procedure for performing modal surveys is proposed. (C) 1998 Academic Press.
引用
收藏
页码：641 / 659
页数：19
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