EPS系统处理超限转角的算法研究

Study on Algorithm for EPS to Deal with Over-limit Steering Angle

针对Hella扭矩转角传感器P信号和S信号开展研究,分析了EPS系统测量角度的基本工作原理,归纳了游标算法角度可循环性特点,以及跟随算法角度可跟随延伸特点,明确了影响有效角度测量范围的关键因素;依此,在超限转角的情况下,提出游标算法角度的测量可信度评估算法,判断其可靠时,使跟随算法角度能获得及时校准和修正,最终保证EPS系统对超限转角的测量可靠性。

Aiming at the P signal and S signal of Hella torque-angle sensor,the basic working principle of angle measure-ment of EPS system was analyzed,the characteristics of angle cycling of vernier algorithm and angle extension of following algorithm were summarized,and the key factors affecting the effective angle measurement range were identified.Based on this,in the case of over-limit steering angle,the measurement reliability evaluation algorithm of vernier algorithm for angle measurement is proposed.When judging its reliability,the angle of the following algorithm can be timely calibrated and corrected,so as to guarantee the measurement reliability of EPS system for over-limit steering angle.