ACCELEROMETER METHOD OF RIDING-QUALITY TESTING

ROAD ROUGHNESS IS MEASURED BY MEANS OF A SENSING MECHANISM CONSISTING OF THREE ACCELEROMETERS. THESE ACCELEROMETERS ARE MOUNTED ON AN ALUMINUM PLATE WHICH REST ON THE CHEST OF A TEST PASSENGER OF MEDIUM BUILD AND FRAME AND WEIGHING BETWEEN 150 AND 175 POUNDS. WHILE THE VEHICLE IS IN TRAVEL, AUTOMATIC RECORDINGS ARE MADE SIMULTANEOUSLY OF VERTICAL, TRANSVERSE AND LONGITUDINAL ACCELERATIONS OF THE TORSO OF THE TEST PASSENGER. THESE RECORDINGS ARE SUMMATED OR INTEGRATED WITH RESPECT TO TIME. THE MAGNITUDE OF THE ROUGHNESS INDEX RESULTING FROM THIS METHOD DEPENDS NOT ONLY ON THE ROAD PROFILE, BUT ALSO ON THE DYNAMIC CHARACTERISTICS OF THE VEHICLE AND THE SPEED AT WHICH THE TRAVERSE IS MADE. EXTRANEOUS VARIABLES, SUCH AS VEHICLE SPRINGS, SHOCK ABSORBERS AND SEAT, TIRES, VEHICLE LOAD AND SPEED, MUST BE CONTROLLED IN MAKING COMPARISONS BETWEEN DIFFERENT PAVEMENT SURFACES. THE REPORT PROVIDES INFORMATION ON HOW CLOSELY THESE VARIABLES MUST BE CONTROLLED. SOME CONCLUSIONS WERE THAT TEST EXCURSION MAY BE MADE AT A SPEED THAT IS COMPATIBLE WITH THE NORMAL FLOW OF TRAFFIC AT MODERATE COST AND THAT TEST RESULTS ARE CLOSELY REPEATABLE, ARE CLOSELY ASSOCIATED WITH RIDING COMFORT AND ARE AVAILABLE IMMEDIATELY.

  • Record URL:
  • Supplemental Notes:
    • Hps-hpr-1/26/, KYHPR-64-25 , BPR27, FEB65
  • Corporate Authors:

    Kentucky Department Highways

    ,    
  • Authors:
    • Rizenbergs, R L
  • Publication Date: 1965-2

Subject/Index Terms

Filing Info

  • Accession Number: 00206255
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Oct 1 1994 12:00AM