Comparative Study on Two Modeling Methods for B-double Vehicles

WANG Guojun, XU Hongguo, LIU Hongfei

Abstract

To develop a four-degrees-of-freedom (DOF) dynamic model for B-double vehicles based on linear tire characteristics, a modeling method was proposed where the system was studied from a whole view. B-double vehicles were made of three vehicle units, including tractor, first semitrailer and second semitrailer. This method carried out the analysis on force and moment equilibrium of three vehicle units, moment equilibrium of second and third vehicle unit, and moment equilibrium of third vehicle unit, and then four differential equations were deduced and solved further. Compared with traditional method taking the analysis on force and moment equilibrium of each vehicle unit, respectively, six differential equations were then deduced. The advantages of whole method were that it did not need to overmuch substitute and solve the constraint conditions between vehicle unit, which decreased the tedious procedures during simplification and avoided the errors in calculations effectively. With the step angle input of tractor steering wheel, simulation results of these two methods are the same asthat of MATLAB, which verifies the validity of the whole method and lays the foundation for more complex dynamic model of multi-trailers combination vehicles in the next step.The results of physical parameter simulation for B-double vehicles were analyzed under low speed and high speed working conditions, respectively. It indicates that B-double vehicles possess rearward amplification (RWA) and are prone to instability more easily at high speed, which further verifies the validity of whole method.

 

 

Keywords: vehicle engineering,  B-double vehicles,  dynamics modeling,  simulation,  step angle input


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References


YING N Y. The introduction of national standard Limits of dimensions, axle load and masses for motor vehicles, trailers and combination vehicles revised edition (GB 1589 - 2016) [J]. Auto &- Safety, 2016(8) : 90-94. (In Chinese)

Editorial Committee of Automotive Engineering Handbook. Automotive engineering handbook: basics[M]. Beijing: China Communication Press.2001:293 - 298. (In Chinese)

HUANG C S. KU1 H L. WU Z X. A simulation study on the dynamics of tractor-semitrailer combination [J ]. Automotive Engineering. 2005. 27(6): 744 - 750. (In Chinese)

WANG G L. WEI N Y. LU Y H. et al. Modeling and experiments of tractor trailer [JJ. Transactions of the Chinese Society for Agricultural Machinery. 2005.36(11): 17 - 20. (In Chinese)

BAO J I, ZHANG X, ZHANG J W. A new method of dynamic model building of combination vehicles [JJ. Journal of Shanghai Jiaotong University.2007,41(2):244 -249. (In Chinese)

XU H G. Auto theory [M]. Beijing: China Communications Press, 2009:131 - 136. (In Chinese)

Society of Automotive Engineering of Japan* Inc. Automotive technology handbook 1: Basic theory[M]. Translator: SAE China. Beijing: Beijing Institute of Technology Press, 2010; 315 - 319. (In Chinese)

LUIJTEN M F J. Lateral dynamic behaviour of articulated commercial vehicles [D]. Eindhoven University of Technology, 2010.

FANF Y. Research of stability control algorithm for triaxial tractor semitrailer[D]. Changchun; Jilin University, 2010. (In Chinese)

CHANG S. XU H G, LIU H F. Extraction of the saddle parameters and analysis of the driving characteristic of tractor-semitrailer _ J J. Journal of Hunan University ( Natural Sciences), 2011,38(2) :35 - 40. (In Chinese)

CROLLA D A. Automotive engineering[M]. TIAN C M. LI S XT; Tanslator. Beijing; China Machine Press, 2012; 266 - 268. (In Chinese)

LIN X, DING N, XU G, etal. High speed optimal yaw stability of tractor-semitrailers with active trailer steering[C]// SAE Technical Paper. 2014.


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