Composite braking control strategy of pure electric bus based on brake driving intention recognition

ZHAO Xuan; MA Jian; WANG Gui-ping

Volume 14 Issue 4

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ZHAO Xuan, MA Jian, WANG Gui-ping. Composite braking control strategy of pure electric bus based on brake driving intention recognition[J]. Journal of Traffic and Transportation Engineering, 2014, 14(4): 64-75.

Citation:

ZHAO Xuan, MA Jian, WANG Gui-ping. Composite braking control strategy of pure electric bus based on brake driving intention recognition[J]. Journal of Traffic and Transportation Engineering, 2014, 14(4): 64-75.

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Composite braking control strategy of pure electric bus based on brake driving intention recognition

1.
School of Automobile, Chang'an University, Xi'an 710064, Shaanxi, China
2.
School of Electronic and Control Engineering, Chang'an University, Xi'an 710064, Shaanxi, China

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Author Bio:
ZHAO Xuan(1983-), male, engineer, PhD, +86-29-82334462, zhaoxuan@chd.edu.cn
Received Date: 2014-05-11
Publish Date: 2014-08-25

Abstract

Abstract

To research braking force distribution ratio of composite braking system for pure electric bus, a composite braking control strategy based on brake driving intention recognition was presented.A double-layer brake driving intention recognition model based on hidden Markov theory was set up and identified by using road experiment data.Based on recognized driving intention and vehicle speed, the distribution ratios of braking forces for front and rear wheels, ECE regulation, motor characteristics, slip ratios, battery characteristics, super capacitor characteristics and transmission system characteristics were taken as constraint conditions, the braking force distribution strategy of composite braking system was proposed, and the control strategy of composite braking system was simulated by Simulink software under 9 operating conditions.Simulation result shows that friction braking system and motor regenerative braking system can work coordinately and steadily under various operating conditions when the braking control strategy is applied, and braking energy can be recovered as much as possible under the premise of ensuring braking safety.Energy recovery efficiency is highest under slight brake when vehicle speed was low, and the efficiency can reach to 43.84%.Energy recovery efficiency is lowest under emergency brake when vehicle speed is high, and the efficiency is only 0.89%.
- automotive engineering,
- pure electric bus,
- brake driving intention,
- Markov model,
- composite braking,
- control strategy

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References(23)

References

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