Ride comfort Research Papers - Academia.edu (original) (raw)
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In order to evaluate the performance of the air spring of the suspension system in comparison with the hydro-pneumatic suspension system, a mathematical model of air and hydro-pneumatic springs of suspension systems is established based... more
In order to evaluate the performance of the air spring of the suspension system in comparison with the hydro-pneumatic suspension system, a mathematical model of air and hydro-pneumatic springs of suspension systems is established based on their nonlinear characteristics. The performance of the air suspension system is evaluated and compared to the hydro-pneumatic suspension system through two objective functions such as the weighted root mean square (rms) of acceleration responses of the vertical direction of the vehicle body (awb) and dynamic load coefficient (DLC). The obtained results indicate that the awb and DLC values with the air suspension system reduce by 11.87 % and 41.46% in comparison with the hydro-pneumatic suspension system when the vehicle moves on the ISO class B road surface at the vehicle speed of 60 km/h and full load. Finally, the performance of the air suspension system is evaluated and compared to the hydropneumatic suspension system under different operating conditions of vehicle and the evaluation results indicate that the ride performance of the air suspension systems has better than the hydro-pneumatic suspension system.
The purpose of this study is to analyze the effects of the parameters of hydropneumatic suspension on vehicle ride comfort. In order to achieve this purpose, a quarter-vehicle vertical dynamic model with two degrees of freedom is... more
The purpose of this study is to analyze the effects of the parameters of hydropneumatic suspension on vehicle ride comfort. In order to achieve this purpose, a quarter-vehicle vertical dynamic model with two degrees of freedom is established under the random road surface excitation. A new mathematical model with combination of rubber and hydro-pneumatic springs for a hydro-pneumatic suspension system is proposed to reduce vehicle noise as well as improve vehicle ride. The parameters of the hydro-pneumatic suspension system such as the initial pressure and volume in air chamber and the initial diameter of damping orifice are respectively analyzed according to the international standard ISO 2631-1. The study results indicate that the suspension parameters has a great effect on the vehicle ride comfort. This studyprovides useful references for the semi-active hydro-pneumatic suspension system design of vehicle..
The purpose of this study is to analyze the effects of the parameters of hydro- pneumatic suspension on vehicle ride comfort. In order to achieve this purpose, a quarter-vehicle vertical dynamic model with two degrees of freedom is... more
The purpose of this study is to analyze the effects of the parameters of hydro- pneumatic suspension on vehicle ride comfort. In order to achieve this purpose, a quarter-vehicle vertical dynamic model with two degrees of freedom is established under the random road surface excitation. A new mathematical model with combination of rubber and hydro-pneumatic springs for a hydro-pneumatic suspension system is proposed to reduce vehicle noise as well as improve vehicle ride. The parameters of the hydro-pneumatic suspension system such as the initial pressure and volume in air chamber and the initial diameter of damping orifice are respectively analyzed according to the international standard ISO 2631-1. The study results indicate that the suspension parameters has a great ef ect on the vehicle ride comfort. This study provides useful references for the semi-active hydro-pneumatic suspension system design of vehicle.
In order to improve the Electric vehicle's ride comfort and road friendliness, a quarter electric vehicle vertical dynamic model under the combination of two excitation sources such as electromagnetic excitation in motor and road surface... more
In order to improve the Electric vehicle's ride comfort and road friendliness, a quarter electric vehicle vertical dynamic model under the combination of two excitation sources such as electromagnetic excitation in motor and road surface roughness excitation is established for searching the optimal design parameters of EV suspension system using genetic algorithm and two objective functions such as the weighted root mean square (rms) acceleration of the vertical vehicle body (aw) according to the international standard ISO 2631-1 and dynamic load coefficient (DLC). The optimal results indicate that the aw and DLC values reduce by 12.71% and 10.36% in comparison with the original suspension system when the vehicle operates under the combination of two excitation sources. Finally, the optimal design parameters of EVsuspension system are evaluated under different operating conditions of the vehicle and the evaluation results indicate that the optimum performance of the EV suspension systems has better than the original suspension system.
The purpose of this paper is to analyze the effects of parameters of cab’s isolation system on ride comfort for a single-drum vibratory roller. To analyze and evaluate the its effects on vehicle ride comfort, a half vehicle dynamic model... more
The purpose of this paper is to analyze the effects of parameters of cab’s isolation system on ride comfort for a single-drum vibratory roller. To analyze and evaluate the its effects on vehicle ride comfort, a half vehicle dynamic model of a single-drum vibratory roller is established under the different operating conditions. The parameters of cab’s isolation system such as stiffness and damping coefficients are respectively analyzed based on two objective functions according to the international standard ISO 2631-1. The analysis results indicate that cab ride comfort is greatly influenced by the parameters of the isolation system. The vehicle ride comfort is going to be worse with the increase of the stiffness coefficient of cab’s isolation system. However, the vehicle ride comfort is improved with the increase of the damping coefficient. Finally, the optimal parameters of cab’s isolation system are proposed through the analytical results under different operating conditions.
The purpose of this study is to analyze the effects of the parameters of hydro- pneumatic suspension on vehicle ride comfort. In order to achieve this purpose, a quarter-vehicle vertical dynamic model with two degrees of freedom is... more
The purpose of this study is to analyze the effects of the parameters of hydro- pneumatic suspension on vehicle ride comfort. In order to achieve this purpose, a quarter-vehicle vertical dynamic model with two degrees of freedom is established under the random road surface excitation. A new mathematical model with combination of rubber and hydro-pneumatic springs for a hydro-pneumatic suspension system is proposed to reduce vehicle noise as well as improve vehicle ride. The parameters of the hydro-pneumatic suspension system such as the initial pressure and volume in air chamber and the initial diameter of damping orifice are respectively analyzed according to the international standard ISO 2631-1. The study results indicate that the suspension parameters has a great effect on the vehicle ride comfort. This study provides useful references for the semi-active hydro-pneumatic suspension system design of vehicle.
The purpose of this paper is to analyze the effects of parameters of cab’s isolation system on ride comfort for a single-drum vibratory roller. To analyze and evaluate the its effects on vehicle ride comfort, a half vehicle dynamic model... more
The purpose of this paper is to analyze the effects of parameters of cab’s isolation system on ride comfort for a single-drum vibratory roller. To analyze and evaluate the its effects on vehicle ride comfort, a half vehicle dynamic model of a single-drum vibratory roller is established under the dif erent operating conditions. The parameters of cab’s isolation system such as stif ness and damping coefficients are respectively analyzed based on two objective functions according to the international standard ISO 2631-1. The analysis results indicate that cab ride comfort is greatly influenced by the parameters of the isolation system. The vehicle ride comfort is going to be worse with the increase of the stif ness coefficient of cab’s isolation system. However, the vehicle ride comfort is improved with the increase of the damping coefficient. Finally, the optimal parameters of cab’s isolation system are proposed through the analytical results under dif erent operating conditions.
The work aims to study the performance of suspension systems for off–road vehicles. Three type of suspensions -passive, hybrid semi–active and Linear Quadratic Regulator (LQR) active suspension systems - are presented using half–car... more
The work aims to study the performance of suspension systems for off–road vehicles. Three type of suspensions -passive, hybrid semi–active and Linear Quadratic Regulator (LQR) active suspension systems - are presented using half–car model. These systems are compared in terms of ride quality, handling, road holding and ability to support vehicle static weight through transient and statistical analyses. Results indicate the responses of the proposed LQR active system to random road excitation relative to the passive system are better than the hybrid semi–active system in terms of the criteria mentioned above.