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1. 发明申请

WO2007060435A1 ELECTRICAL POWER ASSISTED STEERING SYSTEM 审中-公开
标题翻译：电力辅助转向系统
公开(公告)号：WO2007060435A1
公开(公告)日：2007-05-31
申请号：PCT/GB2006/004383
申请日：2006-11-23
申请人： TRW AUTOMOTIVE U.S. L.L.C. , TRW LUCAS VARITY ELECTRIC STEERING LIMITED , FERNANDEZ, Angel, Luis, Andres , MCLAUGHLIN, Kevin
发明人： FERNANDEZ, Angel, Luis, Andres , MCLAUGHLIN, Kevin
IPC分类号： B62D5/04
CPC分类号： B62D5/0466
摘要： An electric power assisted steering system for a vehicle, comprising: a steering mechanism which operatively connects a steering wheel to road wheels of the vehicle, a torque sensor (6) arranged to, in use, produce a torque signal indicative of the torque carried by a portion of the steering mechanism, an electric motor (1) operatively connected to the steering mechanism, a signal processing unit (7) arranged to, in use, produce from the torque signal a torque demand signal (8) representative of a torque to be applied to the steering mechanism by the motor, the signal processing unit comprising a first calculating unit (12) arranged to calculate an initial torque demand signal (10) dependent on the torque signal, and a second calculating unit (13) arranged to, in use, calculate a torque damping signal (11) indicative of an amount the initial torque signal is to be damped in order to generate the torque demand signal, and a motor drive stage arranged to provide, in use, a drive current to the motor responsive to the torque demand signal, in which the second calculating unit comprises an input for a signal dependent upon the torque demand signal, a differentiator (15), arranged to, in use, differentiate the input signal dependent upon the torque signal and a high pass filter arranged to filter the input signal to reduce low frequency components thereof.
摘要翻译：一种用于车辆的电动辅助转向系统，包括：将方向盘操作地连接到车辆的车轮的转向机构，扭矩传感器（6），其在使用中布置成产生表示由转向机构的一部分，可操作地连接到转向机构的电动机（1），信号处理单元（7），其在使用中被设置为从扭矩信号产生表示扭矩的转矩需求信号（8）所述信号处理单元包括：第一计算单元，其被配置为根据所述转矩信号计算初始转矩需求信号;以及第二计算单元，其被布置为，在使用中，计算表示所述初始转矩信号要被衰减的量的扭矩阻尼信号（11），以产生所述转矩需求信号;以及马达驱动级，其被设置为在使用中提供驱动电流对所述电动机响应于所述转矩需求信号，所述第二计算单元包括取决于所述转矩需求信号的信号的输入;微分器（15），其被布置为在使用中根据所述转矩信号来区分所述输入信号以及布置成对输入信号进行滤波以降低其低频分量的高通滤波器。

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