RESEARCH PAPERS: Papers on Transportation

Application of The Parameter Plane Method to The Analysis of Directional Stability of Tractor-Semitrailers

[+] Author and Article Information
R. R. Guntur, J. Y. Wong

Department of Mechanical and Aeronautical Engineering, Carleton University, Ottawa, Canada

J. Dyn. Sys., Meas., Control 100(1), 9-17 (Mar 01, 1978) (9 pages) doi:10.1115/1.3426350 History: Received November 04, 1977; Revised January 30, 1978; Online July 13, 2010


This paper describes the application of the parameter plane method to the study of the effects of design and operational parameters on the directional stability of tractor-semitrailers. The location of the fifth wheel, loading conditions of the semitrailer, and cornering stiffnesses of tires are taken as parameters in the analysis. Stability boundaries for two tractor-semitrailer combinations with different brake systems are drawn on parameter planes as illustrative examples to demonstrate the utility of the method. In the analysis, the effects of normal load and braking effort on the stiffness of tires have been taken into consideration. It is shown that the parameter plane technique can provide the designer with a convenient method to evaluate the relative significance of various design and operational parameters to directional stability.

Copyright © 1978 by ASME
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