The yaw stability control of vehicle is studied based on the integrated-electro-hydraulic brake(I-EHB) system. Motion tracking control algorithm is designed on the basis of direct yaw moment control(DYC). The linear two degrees of freedom vehicle model is used to obtain the reference value of the yaw angular velocity, which is comparied to the actual value of the yaw angular velocity obtained by proportional-integral (PI) control algorithm to calculate the additional yaw moment. Then the additional yaw moment is distributed to single action wheel, and then is transformed to wheel cylinder pressure target value. Wheel cylinder pressure balance control method is used to track the wheel cylinder target pressure. The current target pressurization rate is determined through the look-up table under pressure difference, by using the formula method to fit the relationship between duty ratio and target pressurization rate approximately within the linear scope, and adopting the target pressurization rate as input variable to obtain the duty ratio to control the corresponding solenoid valve. The hardware-in-the-loop (HIL) test bench is built, and the effectiveness of the control strategy is verified on the road surface with high or low adhesion coefficient.
HAN Wei
,
XIONG Lu
,
LI Yu
,
HOU Yimeng
,
YU Zhuoping
. Yaw Stability Control Strategy Based on Integrated-electro-hydraulic Brake System[J]. Journal of Mechanical Engineering, 2017
, 53(24)
: 161
-169
.
DOI: 10.3901/JME.2017.24.161
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