Study on ride comfort of tractor with tandem suspension based on multi-body system dynamics

Abstract

The aim of the paper is to report a systematic methodology which is used to evaluate and improve the ride comfort. An accurate model is necessary for further investigation and optimization. The vehicle dynamics model of tractor with tandem suspension is modeled and simulated in dynamics software ADAMS, which is redeveloped to add a function of automatic parametric modeling and simulation. The modeling methods of nonlinear characteristic components and various road excitation inputs, which can be simply seen as the implementation means for the model solution, are introduced. A new index called annoyance rate is presented to indicate the quantitative correlation between objective method and subjective comment. The quantitative correlation between them, which is quite different from the qualitative ''comfortable'' or ''uncomfortable'' results attained by objective evaluation, can be defined by function and regarded as a basis to scientifically evaluate and improve the ride comfort. According to the request of performance-based design, the parameter sensitive analysis and structure optimization have been carried out to find the trade-off among ride comfort, maneuverability and safety. The approach has proved to be very effective for predicting and improving the ride comfort by experiment results. The methodology can be also used for any other specific category of vehicle.

Driving Rhythm Method for Driving Comfort Analysis on Rural Highways

“…A 5-level wavelet transform of driving rhythm has been processed with the wavelet basic function Daubechies (db3). It consists of 5-scale details of the signal d 1 to d 5 and an approximation of the signal a 5 . These signals represent different information of the wavelet transform of driving rhythm, so in this paper we want to find which signal is related to driving comfort.…”

“…The aim of active suspension control is to improve the driving comfort and reduce the body acceleration [6]. Yang et al [5] presented a new index called annoyance rate to indicate the quantitative correlation between objective methods and subjective comments. Els et al [7] pointed out that for the objective measurements, the ISO 2631, BS 6841, Average Absorbed Power and VDI 2057 methods were used to specify and evaluate the driving comfort.…”

“…The driving comfort is one of the most critical factors to evaluate the automobile performance [5]. The aim of active suspension control is to improve the driving comfort and reduce the body acceleration [6].…”

Ride comfort optimization of a multi-axle heavy motorized wheel dump truck based on virtual and real prototype experiment integrated Kriging model

“…7 In order to find the proper parameters, most engineers carried out the optimization based on the computer model 8,9 because it is possible to change parameters and evaluate the performance in a cost-efficient way compared to changing and testing a full-scale prototype. 10 Just as in the research of Yong Yang et al, 4 the high-precision simulation model is needed. In the practical complex engineering application, the high precision of the model more likely means it will cost more time to make the optimization.…”

“…Finally, the optimized stiffness and related damping of each power unit rubber insulator were found to achieve the optimization of ride comfort. Yang et al 4 proposed a systematic methodology to evaluate and improve the ride comfort. In the study, a new index called annoyance rate was presented to indicate the quantitative correlation between objective method and subjective comment.…”