Dynamic Characteristics Analysis of the Hub Direct Drive-Air Suspension System from Vertical and Longitudinal Directions

Hub direct-drive electric vehicles are driving with hub motors, which cause negative vibration directly on wheels and suspensions. To better analyze the problems of dynamic deterioration resulted by coupling excitations from random road and unbalanced magnetic pull (UMP), a cooperative hub direct dr...

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Published in:Shock and vibration 2021, Vol.2021 (1)
Main Authors: Li, Zhongxing, Song, Xinyan, Chen, Xin, Xue, Hongtao
Format: Article
Language:English
Subjects:
Automobiles, Electric
Coefficients
Coupling
Damping
Dynamic characteristics
Electric vehicles
Excitation
Hard disks
Influence
Magnetic fields
Magnetic pull
Magnetism
Mathematical models
Noise
Optimization
Permeability
Suspension systems
Vibration analysis
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Song, Xinyan
Chen, Xin
Xue, Hongtao
description Hub direct-drive electric vehicles are driving with hub motors, which cause negative vibration directly on wheels and suspensions. To better analyze the problems of dynamic deterioration resulted by coupling excitations from random road and unbalanced magnetic pull (UMP), a cooperative hub direct drive-air suspension (HDD-AS) system is developed, and evaluation indices based on vertical and longitudinal dynamic coupling mechanism are proposed. The vertical and longitudinal characteristics in the time domain under different damping coefficients and motor speeds are demonstrated, and comparison between traditional electric wheel and suspension-integrating models and HDD-AS system model is conducted. Then, the responses of random road excitation and UMP are analyzed, and explanations of vertical and longitudinal characteristics in the frequency domain under different damping coefficients are given. These results provide important insights into the influence of coupling excitations and damping coefficient on the HDD-AS system model. Finally, the effectiveness of the proposed model is verified by the experiment on the test bench.
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To better analyze the problems of dynamic deterioration resulted by coupling excitations from random road and unbalanced magnetic pull (UMP), a cooperative hub direct drive-air suspension (HDD-AS) system is developed, and evaluation indices based on vertical and longitudinal dynamic coupling mechanism are proposed. The vertical and longitudinal characteristics in the time domain under different damping coefficients and motor speeds are demonstrated, and comparison between traditional electric wheel and suspension-integrating models and HDD-AS system model is conducted. Then, the responses of random road excitation and UMP are analyzed, and explanations of vertical and longitudinal characteristics in the frequency domain under different damping coefficients are given. These results provide important insights into the influence of coupling excitations and damping coefficient on the HDD-AS system model. 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source Publicly Available Content Database; Wiley Open Access Journals
subjects Automobiles, Electric
Coefficients
Coupling
Damping
Dynamic characteristics
Electric vehicles
Excitation
Hard disks
Influence
Magnetic fields
Magnetic pull
Magnetism
Mathematical models
Noise
Optimization
Permeability
Suspension systems
Vibration analysis
title Dynamic Characteristics Analysis of the Hub Direct Drive-Air Suspension System from Vertical and Longitudinal Directions
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