基于多样性的汽车线控转向容错研究

为解决线控转向系统转向失效问题,将多样性容错技术应用到汽车线控转向系统中。开展了多样性汽车线控转向系统稳定性分析,建立了线控转向机构与其备份机构之间的关系,提出了基于多样性的转向系统容错设计方法;选用不用经验的驾驶员,在驾驶模拟器上对新设计的线控转向系统进行了转向稳定性试验。研究结果表明,基于多样性容错设计,通过备份的转向功能,驾驶员能根据自己的意图通过转向机构灵活地控制车辆,减少转向失效;同时,能避免由于线控转向系统中过度冗余造成的成本和体积的增加,有利于提高车辆转向稳定性,有利于在汽车线控转向系统中的应用。

Fault-tolerant automobile steering based on diversity of steer-by-wire

In order to solve the problems of steer-by-wire （SBW） system failures,the diversity fault-tolerant technology was applied to the SBW system.The fault-tolerant automobile steering based on diversity of SBW was investigated.After the analysis of the stability of the diversity of steer-by-wire,the relationship between the SBW mechanism and backup mechanisms was established.A method was presented to the fault-tolerant design based on diversity of SBW.A test participant was chosen who has no special skill excepts for over 10 years driving experience.On the driving simulator,the stability of SBW which was designed newly was tested.The experimental results show that the driver can maneuver the vehicle with the steering wheel during the SBW failures.Both cost and volume increase by excessive redundancy within SBW is avoided by the diversified design,thus facilitating SBW application on new-generation vehicles.