New hitch modelling in heavy combination vehicle in various load conditions

Hazman, Ramadhan Hakim (2024) New hitch modelling in heavy combination vehicle in various load conditions. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

An analysis of longitudinal load transfer in a tractor-semitrailer is essential as it provides vital information about how the weight is redistributed between the tractor unit and the semitrailer unit. The objective of this research is to verify a longitudinal model for a tractor- semitrailer, with particular emphasis on a two-axle tractor and a single-axle semitrailer that are coupled by a fifth-wheel hitch system. The tractor-semitrailer model with 12 degrees of freedom is built and simulated using MATLAB Simulink. The validation procedure entails a thorough evaluation, including both qualitative and quantitative analysis, of the simulation data produced by the model in comparison to the data obtained from TruckSim. The verification process consists of a crucial test which is the harsh braking test. The results of the research reveal a notable alignment between the dynamic characteristics of the tractor- semitrailer model produced and the TruckSim dynamics, with an acceptable RMS error. Significantly, the examination of longitudinal load transfer demonstrates that in the strong braking test, the transferred loads display greater magnitudes and an extended length of presence, providing insight into the dynamic complexities of load distribution during intense braking maneuvers. This study makes a substantial contribution to the validation and comprehension of tractor-semitrailer dynamics. It offers essential information to enhance the precision and dependability of simulation models in the field of analyzing the performance of heavy vehicles.

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