线控转向系统的主动转向控制策略

Active Steering Control Strategy of Steer-by-wire System

建立了线控转向系统的整车二自由度模型。对固定转向灵敏度型和横摆角速度反馈型主动转向控制策略进行了性能分析。仿真结果表明,前者可以保持固定转向灵敏度,降低驾驶员负担,但是不改变系统极点;后者可以增加系统阻尼和带宽,改善操纵稳定性。

An entire vehicle model with two degrees of freedom was developed for steer-by-wire system. Two types of active steering control strategies, constant steering gain type and yaw rate feedback type, were studied respectively. The simulation results show that the former strategy can keep constant steering gain and decrease driver workload, but can＇t change system poles; the latter strategy can increase system damp and bandwidth to improve the handling stability.