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汽车TCS液压控制单元特性测试与控制应用

, PP. 1240-1246

Keywords: 车辆工程,牵引力控制,制动压力调节,试验辨识,脉宽调制,滑模控制

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Abstract:

为实现汽车牵引力控制系统(TCS)中的主动液压制动控制精细调节,搭建了基于dSPACE的液压控制单元(HCU)性能测试系统,对HCU电磁阀特征参数进行了试验辨识,确定了采用脉宽调制控制(PWM)进行制动压力控制时目标压力梯度和目标占空比的映射关系。将测试分析结果应用于基于滑模控制的TCS算法,确定了基于目标压力梯度的PWM车轮制动控制逻辑,并在Matlab/Simulink和AMESim联合仿真环境下进行了仿真验证。结果表明:所设计的主动制动控制算法能以较高精度有效调节车轮滑转率,从而改善车辆行驶性能。

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