线控转向系统电子控制单元设计

Design of Electronic Control Unit of SBW

线控转向是未来汽车转向的发展方向,而线控转向系统的电子控制单元是整个转向系统的核心部分,基于MC9S12XET256芯片设计了线控转向系统的电控单元。针对线控转向系统需要直流无刷电机响应速度快、鲁棒性高的要求,设计了滑膜变结构控制器并进行了仿真分析,在实验中进行角阶跃实验。设计并搭建了线控转向系统实验台架,对转向执行电机控制策略进行试验台试验,其结果与仿真相符。

SBW is the development direction of the automotive steer in the future. Electronic control unit of SBW is the core part of the steer system. This paper designs the electronic control unit of SBW based on MC9S12XET256.According to the high robustness and quick response of BLDC, the authors design the controller of sliding variable structure. They set up a test for SBW system and verify the effectiveness of the control strategy of SBW system.