摘要
线控转向完全采用电信号传递驾驶员命令和路面反馈信息，所以对信号传输的确定性、实时性要求更高。提出基于FlexRay总线的线控转向系统实现方案，利用飞思卡尔MC9S12XF512和恩智浦TJAl080A完成转向操纵模块控制节点和转向执行模块控制节点设计。考虑到MATLAB中RTW模块可根据Simulink模型自动生成代码，利用其完成主动前轮转向控制策略代码实现。通过在硬件在环系统中实验，表明：此方案能够及时可靠传递信息，基本满足线控转向对通信系统的要求。相比采用CAN总线通信的线控转向系统，车辆行驶状态参数响应加快0．2～0．5S，幅值变化范围减小35％左有。
As it wholly adopts electronic signals to transmit driver＇s orders and get feedback about the surface conditions, the steer by wire requires communication system a higher demand on certainty and punctuality. Therefore, the scheme for the realization of the steer by wire system with the FlexRay as its bus is proposed. The Freescale MC9S 12XF512 and the NXP TJA1080A are employed to complete the designs of the control node of the steering manipulation module and the steering execution module. Because the RTW module of the Matlab can generate code automatically from the Simulink model, it is used to obtain the active front wheel steering control code. Through an experiment on the hardware in loop system shows that the designed controlling system can reliably transmit information, basically meet the requirements that the steer by wire puts on communication system. Comparing with the steer by wire system used CAN bus to communicate, the response time of the vehicle steering state parameter reduces 0.2-0.5 s, the fluctuation range of the amplitude de- creases about 35%.
出处
《电子测量与仪器学报》
CSCD
2013年第3期258-263,共6页
Journal of Electronic Measurement and Instrumentation
