Compensation of additional mass effect in frequency response function measurement

Naoki Hosoya, Takuya Yoshimura

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The acceleration sensors are generally attached to the structure to measure the response in FRF (frequency response function) measurement. The mass of the sensor often have some effect on dynamic characteristics of the structure. This paper proposes a new method for compensation of sensor's mass effect in FRF measurements. In the method, inertial force of the sensor's mass is regarded as external force acting on the structure ; FRF is corrected so as to remove the external force effect. The compensated FRFs of an accuracy are evaluated by a Reliability Factor which it is installed in this paper. The compensation method for the use of multiple sensors is also presented. The method is validated by applying it to a brass plate structure. The usability of the method is demonstrated via measuring FRFs of a car body.

Original languageEnglish
Pages (from-to)37-44
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume72
Issue number1
Publication statusPublished - 2006 Jan
Externally publishedYes

Fingerprint

Frequency response
Sensors
Brass
Railroad cars
Compensation and Redress

Keywords

  • Experimental Modal Analysis
  • Frepuency Response Function
  • Impact testing
  • Mass Compensation
  • Reliability Factor

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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AB - The acceleration sensors are generally attached to the structure to measure the response in FRF (frequency response function) measurement. The mass of the sensor often have some effect on dynamic characteristics of the structure. This paper proposes a new method for compensation of sensor's mass effect in FRF measurements. In the method, inertial force of the sensor's mass is regarded as external force acting on the structure ; FRF is corrected so as to remove the external force effect. The compensated FRFs of an accuracy are evaluated by a Reliability Factor which it is installed in this paper. The compensation method for the use of multiple sensors is also presented. The method is validated by applying it to a brass plate structure. The usability of the method is demonstrated via measuring FRFs of a car body.

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