Baseline correction of vibration acceleration signals with inconsistent initial velocity and displacement

Advances in Mechanical Engineering. 2016;8 DOI 10.1177/1687814016675534

 

Journal Homepage

Journal Title: Advances in Mechanical Engineering

ISSN: 1687-8132 (Print); 1687-8140 (Online)

Publisher: SAGE Publishing

LCC Subject Category: Technology: Mechanical engineering and machinery

Country of publisher: United Kingdom

Language of fulltext: English

Full-text formats available: PDF, HTML

 

AUTHORS


Chao Pan (College of Civil Engineering, Yantai University, Yantai, China)

Ruifu Zhang (Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai, China)

Hao Luo (Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai, China)

Hua Shen (Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai, China)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 16 weeks

 

Abstract | Full Text

This study improves upon the traditional polynomial detrending method in order to correct the vibration acceleration signals with inconsistent initial velocity and displacement more rationally and efficiently. When numerical integration of recorded acceleration signals using assumed initial velocity and displacement values (which are generally inconsistent with real values) is performed, baseline shift or drift phenomenon can arise in velocity and displacement curves obtained. Baseline correction must be performed if an inconsistent acceleration signal is to be used in dynamic analyses. Polynomial detrending is generally used to remove unreasonable trends in time series, but the consistency among acceleration, velocity, and displacement has not received sufficient attention. The traditional polynomial detrending method is improved by purposefully removing the shifted trends in velocity and displacement. Two inconsistent vibration signals are selected to be corrected using both the traditional method and the improved method. It was found that the traditional method does not give a satisfactory correction result, but the improved method can correct the signal to be consistent. The improved detrending method is effective in making vibration signals have consistent acceleration, velocity, and displacement.