Simulation Analysis of Dynamical Performance and e
Simulation Analysis of Dynamical Performance and e
Simulation Analysis of Dynamical Performance and e
E-mail:cqu_pjl@163.com
Abstract. Aimming at the problem that it is difficult to evaluate whether the dynamical
performance and economic performance meet the expected indicators after selecting
powertrain for the special vehicle, a vehicle simulation model was built based on the vehicle
dynamics theory for the simulation analysis of dynamical performanc and economic
performance. The maximum speed, acceleration time, maximum climbing slope and the
biggest continue voyage course were obtained by simulating. The simulation results show that
its dynamical performance and economic performance meet the expected targets, and the
vehicle simulation model has high accuracy and short modeling cycle, which can provide
reference for the development of the electric vehicle.
1. Introduction
Compared with traditional vehicles, electric vehicle have made great progress in energy efficiency
and environmental protection [1].Therefore, the development of electric vehicle has become the
development direction of the current automobile industry. The power system of pure electric vehicle is
a complex multi-disciplinart system, mainly composed of power battery, drive motor and transmission
system. The evaluation indexes of dynamical performane of pure electric vehicle include maximum
speed, acceleration time and maximum climbing slope, and the evaluation indexes of economic
performane include energy consumption rate and driving range.
It is necessary to use advanced simulation technology for performance simulation analysis and
verification of control algorithm. It can reduce development cycle and save development cost that
using simulation software to establish analysis model. Also, it has become an important link of
development.
Japanese scholars developed electric vehicle models earlier. For example, in literature [2] ,they
designed a 7-DOF vehicle model without considering vehicle's vertical movement .CHEN Chun-ju [3]
built a model of the vehicle and simulated its dynamic and fule economy.WEI Dai-qiang [4]
established a vehicle simulation model which can be used to do dynamic simulation for conducting to
verify rationality of the design parameters.
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Published under licence by IOP Publishing Ltd 1
2022 International Conference on Defence Technology (2022 ICDT) IOP Publishing
Journal of Physics: Conference Series 2478 (2023) 122015 doi:10.1088/1742-6596/2478/12/122015
Tian Jinyue [5] established a simulation model of vehicle and a vehicle unit , and the driveline
system has been simulated on NEDC and acceleration conditions. And the paper also makes an
analysis of the influents on vehicle's dynamic, economic and jerk performances caused by
transmission's parameters. Han shou-song [6] built the PHHV complete model. In accordance with the
PHHV's working characteristics, the output torque control strategy of the engine and hydraulic
pump/motor is designed based on the driving torque needed to improve the fuel economy. Lu Xun [7]
put forward a method of optimizing ECVT speed ratio based on the best transmission efficiency line in
the full power domain. The dynamic and economic performance of an ECVT pure electric vehicle was
simulated and analyzed by AMESim.
This paper built an eight-wheel drive electric vehicle model with four inter-shaft motors including
the driving motor, battery, transmission system and driving condition models based on the simulation
software. The simulation analysis of dynamical performance and economic performance for this
model.
2
2022 International Conference on Defence Technology (2022 ICDT) IOP Publishing
Journal of Physics: Conference Series 2478 (2023) 122015 doi:10.1088/1742-6596/2478/12/122015
parameters value
vehicle weight /kg 10000
rolling resistance coefficient 0.0625
2
windward area/m 6.37
air resisitance coefficient 0.65
Free tyre radius/m 0.5407
3
2022 International Conference on Defence Technology (2022 ICDT) IOP Publishing
Journal of Physics: Conference Series 2478 (2023) 122015 doi:10.1088/1742-6596/2478/12/122015
4
2022 International Conference on Defence Technology (2022 ICDT) IOP Publishing
Journal of Physics: Conference Series 2478 (2023) 122015 doi:10.1088/1742-6596/2478/12/122015
5
2022 International Conference on Defence Technology (2022 ICDT) IOP Publishing
Journal of Physics: Conference Series 2478 (2023) 122015 doi:10.1088/1742-6596/2478/12/122015
The speed of the vehicle an the control speed corresponding to time is shown in Figure 6.
According to Figure 6, it can be found that the speed at other times can be completely followed with
control speed except for the speed near the highest speed in WLTC condtion. The following
characteristic is good.
Figure 6. Control speed and vehicle speed vs. time under WLTC condition.
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2022 International Conference on Defence Technology (2022 ICDT) IOP Publishing
Journal of Physics: Conference Series 2478 (2023) 122015 doi:10.1088/1742-6596/2478/12/122015
The SOC corresponding to time is shown in Figure 7. According to Figure 7, it can be found that
the SOC reduced from 95% at the beginning to 57.3% at the end of the cycle, and the battery SOC
was used up 37.7% during the whole WLTC cycle.
The distance of the vehicle corresponding to time is shown in Figure 8. According to Figure 8, it
can be found that the distance of the vehicle is 21.52 km during the whole WLTC cycle.
If the minimum SOC value is set at 20%, the driving mileage is 46 km according to the date in the
Figure 7 and Figure 8.
4. Conclusion
In this paper, a vehicle simulation model of a heavy-duty vehicle with eight wheels and four inter-
shaft motors was built.The maximum speed, the acceleration time and the maximum climbing slope of
7
2022 International Conference on Defence Technology (2022 ICDT) IOP Publishing
Journal of Physics: Conference Series 2478 (2023) 122015 doi:10.1088/1742-6596/2478/12/122015
the vehicle simulation model were obtained through dynamical performance simulation. At the same
time, the economic performance simulation under the WLTC condition was carried out, and the
driving mileage was obtained. The simulation results are satisfactory and it can achieve the expected
goal through comparing with the expected index. The simulation analysis of dynamical performance
and economic performance can provide referance for the development of the electric vehicle.
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