Road Roughness Evaluation by Curve-Fitting and Subspace-Identification Methods

TÜRKAY S., AKÇAY H.

JOURNAL OF TRANSPORTATION ENGINEERING, vol.142, no.11, 2016 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 142 Issue: 11
  • Publication Date: 2016
  • Doi Number: 10.1061/(asce)te.1943-5436.0000877
  • Journal Name: JOURNAL OF TRANSPORTATION ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Road profile, Roughness, Motor industry research association, ISO 8608, International roughness index, Power spectral density, Root mean square, System identification subspace method, Frequency domain, FREQUENCY-DOMAIN, PROFILES
  • Anadolu University Affiliated: Yes

Abstract

In this paper, for a quarter-car model, root-mean square response variables are calculated for roads classified by the international standard organization, based on the straight-line spectrum models. Covariance expressions are derived for vehicle response variables assuming that the road spectrum is that of a Motor Industry Research Association (MIRA) spectrum and compared with the existing results in the literature. The international standard and the MIRA spectra are then compared with the models delivered by high resolution frequency-domain subspace identification algorithms. The IRI statistic of the quarter-car response is calculated for the road models built by the curve fitting and the identification methods from the measured road spectrum assuming that the road excitation is a zero-mean Gaussian process