scholarly journals Optimal suspension settings for ride comfort of road vehicles

2010 ◽  
Vol 54 (2) ◽  
pp. 73 ◽  
Author(s):  
Dezső Szőke ◽  
János Lógó ◽  
Dániel B. Merczel
Keyword(s):  
Ride Comfort ◽  
Road Vehicles

Optimal Ride Comfort and Active Safety of Road Vehicles

2007 ◽  
pp. 121-158
Author(s):  
Giampiero Mastinu ◽  
Massimiliano Gobbi ◽  
Carlo Miano
Keyword(s):  
Ride Comfort ◽  
Active Safety ◽  
Road Vehicles

scholarly journals Optimization and testing of suspension system of electric mini off-road vehicles

2019 ◽  
Vol 103 (1) ◽  
pp. 003685041988187
Author(s):  
Bin Yu ◽  
Zhice Wang ◽  
Dayou Zhu ◽  
Guoye Wang ◽  
Dongxin Xu ◽  
...  
Keyword(s):  
Power Spectrum ◽  
Ride Comfort ◽  
Response Characteristic ◽  
Power Spectrum Density ◽  
Damping Coefficient ◽  
Road Vehicles ◽  
Road Vehicle ◽  
Road Roughness ◽  
Vibration Model ◽  
Spectrum Density

Mini vehicles with a small wheelbase are extremely sensitive to road roughness. The aim of this study is to explore the influence of road information on ride comfort and enhance the ride comfort of mini vehicles. According to the 5-degree-of-freedom vibration model of an electric mini off-road vehicle, the partial differential matrix equation of system motion is established using the Lagrange method, and the frequency response characteristic of the system is analyzed. The input matrix of pavement unevenness is obtained by considering the mutual power spectrum density between front and rear wheels. Road surface roughness information is obtained using an instrument for measuring road roughness. A comprehensive objective function and a constraint condition are established for comfort and safety. Based on the parameters obtained through the optimum design of a 1/4 vehicle model, the optimized stiffness and damping coefficient of suspension are obtained using a MATLAB optimization program. The law of the vibration performance of off-road vehicles with respect to suspension stiffness and the damping coefficient is obtained through the analysis of optimized results. A driving simulation and a test are conducted on the electric mini off-road vehicle. The results show that the use of the measured pavement data as simulation input is closer to the actual situation and provides higher accuracy compared to the simulated pavement model. According to the optimization and test results, the parameters optimized by a 1/2 vehicle (5 degrees of freedom) vibration model are better than those optimized by the 1/4 vehicle vibration model. The optimization results confirm reduction in acceleration, acceleration power spectrum density, and the root mean square of the weighted acceleration of the seat. This shows that the electric mini off-road vehicle provides better ride comfortability after optimization.

Evaluation of Passenger Ride Comfort of Indian Rail and Road Vehicles with ISO 2631-1 Standards Part 2 - Simulation

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
R.C. Sharma
Keyword(s):  
Ride Comfort ◽  
Road Vehicles ◽  
Rail Vehicle ◽  
Normal Duration ◽  
Indian Railway ◽  
Iso 2631 ◽  
Comfortable Ride

In this paper ride comfort of Indian road and rail vehicle is evaluated using ISO 2631-1 comfort specifications. A three wheel vehicle, light four wheel vehicle and general sleeper ICF coach of Indian railway have been evaluated on the basis of 1 hr, 2.5 hrs, 4 hrs and 8 hrs ISO 2631 comfort specifications in seated position as these are the normal duration for passengers. An insight to comfortable ride duration for these vehicles is presented in this paper.

Evaluation of Passenger Ride Comfort of Indian Rail and Road Vehicles with ISO 2631-1 Standards Part 1 - Mathematical Modelling

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
R.C. Sharma
Keyword(s):  
Mathematical Modelling ◽  
Ride Comfort ◽  
Dominant Factor ◽  
Ride Quality ◽  
Passenger Vehicle ◽  
Performance Indices ◽  
Road Vehicles ◽  
Rail Vehicles ◽  
Indian Railway ◽  
Iso 2631

Ride quality and ride comfort are the most important performance indices of road or rail vehicles and is affected by various factors, such as vibrations, acoustics, smell, temperature, visual stimuli, humidity and seat design. Among these vibration is a dominant factor that influences the performance indices the most. In this work the coupled vertical-lateral mathematical models of Indian rail and road vehicles have been formulated using Lagrangian. The roadway vehicles considered for this analysis are three wheel and light four wheel Indian passenger vehicle. The rail vehicles considered for this analysis are General sleeper ICF coach of Indian railway.

Design, Modeling and Ride Analysis of Energy-Harvesting Hydraulically Interconnected Suspension

2021 ◽  
Author(s):  
Bonan Qin ◽  
Yuzhe Chen ◽  
Lei Zuo
Keyword(s):  
Energy Harvesting ◽  
Ride Comfort ◽  
Simulation Software ◽  
Dynamic Responses ◽  
Hydraulic Efficiency ◽  
Road Vehicles ◽  
Shock Absorbers ◽  
Oil Shock ◽  
Regenerative Power ◽  
Suspension Model

Abstract This paper introduces a novel energy-harvesting hydraulically interconnected suspension (EH-HIS) to improve the riding comfort and road handling performance for off-road vehicles while harvesting the vibration energy traditionally dissipated into heat by the oil shock absorbers. To understand the system, we built a model of the off-road vehicle equipped with the EH-HIS and conducted the performance analysis. The system model is established based on the pressure drop principle and validated by commercial simulation software AMESim. The damping characteristic and energy harvesting performance have been investigated based on the mathematical suspension model. Further, a thorough analysis is implemented to compare the dynamic responses of the vehicle equipped with the traditional suspension and EH-HIS under different driving speeds and road classes. Results show that the EH-HIS system can provide tunable asymmetric damping from 3134 Ns/ to 7558 Ns/m, which covers most of the damping range of the off-road vehicles. The average regenerative power of the half EH-HIS system reaches 438 watts, and the corresponding hydraulic efficiency reaches 19%, at a vibration input of 2 Hz frequency and 30 mm amplitude. The ride analysis shows that the vehicle equipped with the EH-HIS system on the D class road has good handling stability and better ride comfort over the traditional suspension.

scholarly journals The ride comfort vs. handling compromise for off-road vehicles

2007 ◽  
Vol 44 (4) ◽  
pp. 303-317 ◽  
Author(s):  
P.S. Els ◽  
N.J. Theron ◽  
P.E. Uys ◽  
M.J. Thoresson
Keyword(s):  
Ride Comfort ◽  
Road Vehicles
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