Research Papers

Development of a Vehicle Stability Control System Using Brake-by-Wire Actuators

[+] Author and Article Information
Daegun Hong

Department of Automotive Engineering, Hanyang University, 17 Haengdang-Dong, Sungdong-Gu, Seoul 133-791, Korea

Inyong Hwang, Paljoo Yoon

Global R&D Headquarters, Mando Corporation, 413-5 Gomae-Dong, Giheung-Gu, Yongin-Si, Kyonggi-Do 449-901, Korea

Kunsoo Huh1

School of Mechanical Engineering, Hanyang University, 17 Haengdang-Dong, Sungdong-Gu, Seoul 133-791, Koreakhuh2@hanyang.ac.kr


Corresponding author.

J. Dyn. Sys., Meas., Control 130(1), 011008 (Dec 18, 2007) (9 pages) doi:10.1115/1.2807190 History: Received April 25, 2006; Revised June 04, 2007; Published December 18, 2007

The wheel slip control systems are able to control the braking force more accurately and can be adapted to different vehicles more easily than conventional braking control systems. In order to achieve the superior braking performance through the wheel slip control, real-time information such as tire braking force at each wheel is required. In addition, the optimal target slip values need to be determined depending on the braking objectives such as minimum braking distance, stability enhancement, etc. In this paper, a vehicle stability control system is developed based on the braking monitor, wheel slip controller, and optimal target slip assignment algorithm. The braking monitor estimates the tire braking force, lateral tire force, and brake disk-pad friction coefficient utilizing the extended Kalman filter. The wheel slip controller is designed based on the sliding mode control method. The target slip assignment algorithm is proposed to maintain the vehicle stability based on the direct yaw-moment controller and fuzzy logic. A hardware-in-the-loop simulator (HILS) is built including electrohydraulic brake hardware and vehicle dynamics software. The effectiveness of the proposed stability control system is demonstrated through the HILS experiment.

Copyright © 2008 by American Society of Mechanical Engineers
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Figure 1

Block diagram of the vehicle stability control method

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Figure 2

Force diagram of a vehicle

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Figure 3

Force diagram of a wheel

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Figure 4

Hydraulic disk brake

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Figure 5

Experimental results on normal road

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Figure 6

Experimental results on slippery road

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Figure 7

Reference yaw rate

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Figure 8

Target slip determination using fuzzy logic

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Figure 9

Membership function for the input, Mz

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Figure 10

Membership function for the input, λ

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Figure 11

Membership function for the output, Δλ

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Figure 13

Braking force estimation results

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Figure 14

Lateral tire force estimation results

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Figure 15

Brake disk-pad friction estimation result and stabilizing yaw moment

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Figure 16

Target slip and slip control results

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Figure 17

Vehicle stability control results

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Figure 18

Lateral acceleration—side slip angle




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