公开(公告)号：US20140277946A1

公开(公告)日：2014-09-18

申请号：US13840030

申请日：2013-03-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： KENNETH L. OBLIZAJEK ,  JOHN D. SOPOCI ,  SURESH PURADCHITHASAN

IPC: B62D5/04

CPC classification number: B62D5/0472

Abstract: Methods and apparatus are provided for reducing steering wheel vibrations in electronic power steering systems. The apparatus includes a processor and performs a method that estimates an average angular wheel speed of at least one wheel of the vehicle; determines an average wheel angle from the average angular wheel speed; generates sine and cosine functions of the average angular wheel angle; processes the sine and cosine functions with a steering wheel torque signal received from a torque sensor to extract amplitude components of at least one of the sine and cosine functions; reconstructs the sine and cosine functions using the steering wheel torque signal; combines the sine and cosine functions to provide a control signal, and controls the EPS system via the control signal to attenuate smooth road shake vibrations in a steering wheel of the vehicle.

Abstract translation: 提供了用于减少电子助力转向系统中的方向盘振动的方法和装置。 该装置包括处理器，并且执行估计车辆的至少一个车轮的平均角轮速度的方法; 从平均角轮速度确定平均车轮角度; 产生平均角轮角度的正弦和余弦函数; 使用从扭矩传感器接收的方向盘扭矩信号处理正弦和余弦函数，以提取至少一个正弦和余弦函数的振幅分量; 使用方向盘扭矩信号重建正弦和余弦函数; 结合正弦和余弦功能来提供控制信号，并通过控制信号控制EPS系统，以衰减车辆方向盘中平稳的道路抖动振动。

公开(公告)号：US20130211677A1

公开(公告)日：2013-08-15

申请号：US13841031

申请日：2013-03-15

Applicant: GM Global Technology Operations LLC

Inventor： KENNETH L. OBLIZAJEK ,  JOHN D. SOPOCI ,  SURESH PURADCHITHASAN

IPC: B62D5/04

CPC classification number: B62D5/0472 ,  B62D5/046

Abstract: Methods and systems are provided for suppression of steering wheel vibrations generated by periodic disturbances in a vehicle steering system. An exemplary method reducing steering wheel vibrations caused by periodic disturbances involves determining a gross torque attributable to the periodic disturbances in the steering system, identifying a desired amount of suppression of the vibrations at the steering wheel, determining an offset torque based on the gross torque and the desired amount of suppression, and generating a motor command signal in a manner that is influenced by the offset torque. The motor drive command signal is provided to an electric motor coupled the steering wheel and/or the vehicle tires, and the motor drive command signal influences the torque applied by the motor to assist steering of the vehicle tires by the steering wheel in a manner that attenuates the vibrations communicated to the steering wheel by the desired amount.

Abstract translation: 提供了用于抑制由车辆转向系统中的周期性扰动产生的方向盘振动的方法和系统。 减少由周期性扰动引起的方向盘振动的示例性方法包括确定归因于转向系统中的周期性干扰的总转矩，识别期望的方向盘振动抑制量，基于总扭矩确定偏移扭矩， 期望的抑制量，并且以受偏移扭矩影响的方式产生电动机命令信号。 马达驱动指令信号被提供给耦合方向盘和/或车辆轮胎的电动马达，并且马达驱动指令信号影响由马达施加的扭矩，以辅助方向盘来转向车辆轮胎，方式如下： 衰减传递到方向盘的振动所需的量。