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RESEARCH PAPERS: Technical Papers

Analysis of a Platform for Measuring Moments and Products of Inertia of Large Vehicles

[+] Author and Article Information
D. Orne, T. Schmitz

Department of Mechanical Engineering Sciences, Wayne State University, Detroit, Mich.

J. Dyn. Sys., Meas., Control 98(2), 186-195 (Jun 01, 1976) (10 pages) doi:10.1115/1.3427008 History: Received October 31, 1975; Online July 13, 2010

Abstract

A rigid platform symmetrically supported by four sloping cables is proposed for measuring the center-of-gravity coordinates and the moments and products of inertia of large vehicles such as buses, trucks, and trailers. In addition to a torsional degree-of-freedom, the system undergoes pitch and roll motions about axes through the system instantaneous center which lies directly below the center of the platform at the intersection of the cable lines-of-action under quiescent conditions. The natural frequencies and normal modes of the freely vibrating loaded platform are used as inputs to a linearized System Identification Algorithm for computing the inertia properties of the test vehicle. Hypothetical test data generated from the Free Vibration Analysis of a sample test configuration are used to evaluate the sensitivity of the System Identification Algorithm to inaccuracies in test data or to truncation errors in computation.

Copyright © 1976 by ASME
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