Phase correction for frequency response function measurements

被引：10

作者：

Ganguly, Vasishta ^{[1
]}

Schmitz, Tony L. ^{[1
]}

机构：

[1] Univ N Carolina, Charlotte, NC 28223 USA

来源：

PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY | 2014年 / 38卷 / 02期

关键词：

Namics; Modal; Time delay; Accelerometer; Capacitive sensor;

D O I：

10.1016/j.precisioneng.2013.12.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In modal testing, an impulse is often used to excite the structure and a linear transducer is used to measure the response. For these impact tests, two signals are measured: the impulsive force and the vibration response. Any lack of synchronization in the time domain acquisition of the two signals results in a frequency-dependent phase error in the frequency response function, or FRF. However, knowledge of the time delay may be used to correct the corresponding phase error. In this research, tests were conducted to measure the frequency-dependent phase error for a capacitive sensor and a frequency domain technique is proposed to correct the FRF. The method was validated using an FRF measurement of a cylindrical artifact mounted in a milling machine spindle. (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：409 / 413

页数：5