Abstract
This study proposes a nonlinear dynamic model of the heavy trucks to evaluate the influence of the various working conditions on the ride comfort and road friendliness of the heavy vehicles based on Matlab/Simulink software. The weighted root mean square (RMS) acceleration responses of the vertical driver’s seat, the cab’s pitch and roll angles, and the dynamic load coefficient (DLC) are chosen as objective functions. The influence of the vehicle velocity and loads on the different road surfaces are evaluated based on the standard ISO 2631-1. The results show that the vehicle’s ride comfort is clearly affected on the road surfaces of ISO level C and D at the range of the vehicle velocity. Especially, the vehicle’s ride comfort is very poor at the velocity of 10-30 m.s-1 on ISO level D. The road friendliness of the vehicle is greatly decreased in the condition of the half-loaded vehicle. Particularly the vertical dynamic wheel loads at 2nd axle strongly affect the road damage at the velocity of 10-30 m.s-1.
Highlights
The market of the heavy trucks was competing very fierce and the features of the heavy trucks were claimed higher
The influence of the heavy truck dynamic parameters on the ride comfort was analyzed via 3D vehicle dynamic model, and the suspension system parameters of the cab and the vehicle of the heavy trucks were designed and optimized through a half-vehicle model [1,2,3], the objective functions were to improve the driver’s seat comfort and controlling the cab’s pitch angle
In order to evaluate the effect of the various operating conditions on the ride comfort and road friendliness of heavy truck, two evaluate methods are carried out including: Basic evaluation method: According to the international standard ISO 2631-1 [12], the effect of vibration on ride comfort is evaluated based on the weighted root-mean-square (RMS) acceleration responses, which is defined as in Eq (7)
Summary
The market of the heavy trucks was competing very fierce and the features of the heavy trucks were claimed higher. One of the most important requirements is to improve the ride comfort and road friendless. The influence of the heavy truck dynamic parameters on the ride comfort was analyzed via 3D vehicle dynamic model, and the suspension system parameters of the cab and the vehicle of the heavy trucks were designed and optimized through a half-vehicle model [1,2,3], the objective functions were to improve the driver’s seat comfort and controlling the cab’s pitch angle. A half-vehicle model with hybrid balance control of a heavy truck suspension system was studied [4], and the PID-fuzzy control and wheelbase preview were combined to control the semi-active air suspension of the half-heavy truck model [5]. The heavy truck’s ride comfort was the goal of researches
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