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Stability Analysis of Combined Braking System of Tractor-Semitrailer Based on Phase-Plane Method

Journal Article
02-11-02-0012
ISSN: 1946-391X, e-ISSN: 1946-3928
Published June 04, 2018 by SAE International in United States
Stability Analysis of Combined Braking System of Tractor-Semitrailer Based on Phase-Plane Method
Citation: He, R., Jing, Z., and Shen, X., "Stability Analysis of Combined Braking System of Tractor-Semitrailer Based on Phase-Plane Method," SAE Int. J. Commer. Veh. 11(2):151-160, 2018, https://doi.org/10.4271/02-11-02-0012.
Language: English

Abstract:

An analysis method for the stability of combined braking system of tractor-semitrailer based on phase-plane is investigated. Based on a 9 degree of freedom model, considering longitudinal load transfer, nonlinear model of tire and other factors, the braking stability of tractor-semitrailer is analyzed graphically on the phase plane. The stability of both tractor and semitrailer with different retarder gear is validated with the energy plane, β plane, yaw angle plane and hinged angle plane. The result indicates that in the long downhill with curve condition, both tractor and semitrailer show good stability when retarder is working at 1st and 2nd gear, and when it is at 3rd gear, the tractor is close to be unstable while semitrailer is unstable already. Besides, tractor and semitrailer both lose stability when retarder is working at the 4th gear.