Semi-active control of metro vehicle based on flexible multi-body dynamics

CHEN Zhao-wei; ZHU Guo

doi:10.19818/j.cnki.1671-1637.2021.06.024

Volume 21 Issue 6

Dec. 2021

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CHEN Zhao-wei, ZHU Guo. Semi-active control of metro vehicle based on flexible multi-body dynamics[J]. Journal of Traffic and Transportation Engineering, 2021, 21(6): 298-309. doi: 10.19818/j.cnki.1671-1637.2021.06.024

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CHEN Zhao-wei, ZHU Guo. Semi-active control of metro vehicle based on flexible multi-body dynamics[J]. Journal of Traffic and Transportation Engineering, 2021, 21(6): 298-309. doi: 10.19818/j.cnki.1671-1637.2021.06.024

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Semi-active control of metro vehicle based on flexible multi-body dynamics

doi: 10.19818/j.cnki.1671-1637.2021.06.024

CHEN Zhao-wei^{1, 2
,},
ZHU Guo^{1, 2
,
,}

1.
School of Mechanotronics and Vehicle Engineering, Chongqing Jiaotong University, Chongqing 400074, China
2.
Chongqing Key Laboratory of Railway Vehicle System Integration and Control, Chongqing Jiaotong University, Chongqing 400074, China

Funds:

National Natural Science Foundation of China 52008067

China Postdoctoral Science Foundation 2019M650236

Basic Natural Science and Frontier Technology Research Program of Chongqing cstc2018jcyjAX0271

Open Funding of State Key Laboratory of Mountain Bridge and Tunnel Engineering SKLBT-19-002

More Information

Author Bio:
CHEN Zhao-wei(1988-), male, associate professor, PhD, chenzhaowei_cq@163.com
Corresponding author: ZHU Guo(1995-), male, graduate student, zhuguo_incq@163.com
Received Date: 2021-07-08
Available Online: 2022-02-11
Publish Date: 2021-12-01

Abstract

Abstract

To realize more accurate evaluation and more effective optimization of the running performance of metro vehicles, based on the finite element theory and substructure theory, the flexible dynamics models of critical parts, such as car body and bogie frame, were established. Based on the algorithm of semi-active skyhook control and the theory of flexible multi-body dynamics, the rigid-flexible coupling dynamics model of a metro vehicle was established considering a semi-active control suspension.The effect of random track irregularity was considered, and the influences of semi-active control suspension and structural flexibility on the running stability and ride comfort of metro vehicles were investigated. Analysis results show that compared to the traditional suspension device, the semi-active skyhook control can significantly reduce the vibration acceleration of the vehicle and decrease its variation trend, suppressing the low-frequency vibration of the vehicle obviously. Based on the parameters adopted in this study, the semi-active skyhook control decreases the vertical Sperling index and root mean square (RMS) of vertical vibration acceleration on the straight segment by 26.8% and 7.5%, respectively, and 8.8% and 4.9% for lateral vibration acceleation, respectively. The semi-active skyhook control decreases the values of vertical vibration acceleration on the curve segment by 25.1% and 5.7%, respectively, and 15.6% and 8.3% for lateral vibration acceleration, respectively. Thus, the ride comfort and running stability of the vehicle improve significantly. Under considering the structural flexibility, the vertical Sperling index and RMS of vertical vibration acceleration of the vehicle increase by 4.3% and 6.8%, respectively, compared to those under no considering the structural flexibility, and 3.0% and 3.4% for lateral vibration acceleration, respectively. Thus, the structural flexibilities of the car body and frame significantly influence the dynamic characteristics of the vehicle and should be considered in calculating and evaluating the vehicle running stability and ride comfort. 5 tabs, 21 figs, 29 refs.
- railway vehicle,
- flexible multi-body dynamics,
- semi-active control,
- substructure theory,
- finite element theory,
- dynamic characteristic

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References(29)

References

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Semi-active control of metro vehicle based on flexible multi-body dynamics

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