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    • 3. 发明申请
    • Steering unit and internal drag calculation apparatus used therein
    • 其中使用的转向单元和内部阻力计算装置
    • US20020121402A1
    • 2002-09-05
    • US10000133
    • 2001-12-04
    • TOYODA KOKI KABUSHIKI KAISHA
    • Shinji TakeuchiToshihiro TakahashiMinekazu MomiyamaEiichi OnoShoji AsaiHiroshi Kuroyanagi
    • B62D005/04
    • B62D5/0463B62D5/0472B62D6/008
    • A power steering apparatus is provided to generate an assistant force corresponding to a change of viscous friction in the steering unit or the like, without losing information on reaction force from a road surface. An external force calculation portion calculates an external force, that is, a force other than a force for steering (i.e. a steering force) among forces (action forces) acting on the steering unit of a vehicle. The external force is assumed to be composed of an outside force received from the road surface, such as an SAT (self-aligning torque), and an internal drag resulting from a viscous friction generated in the steering unit, and the like and these two forces are separated in an outside force and internal drag calculation portion. In separating these two forces, under the assumption that the outside force is a function of a side slip angle and an internal drag is a function of a steering angular velocity, and coefficients of functions are obtained. On the basis of the thus calculated internal drag, a motor control portion controls a motor so as to generate an adequate assistant force.
    • 提供动力转向装置以产生对应于转向单元等中的粘性摩擦变化的辅助力,而不会丢失关于来自路面的反作用力的信息。 外力计算部计算作用于车辆的转向单元的力(动作力)之外的外力,即除了转向力以外的力(即,转向力)。 假设外力由从路面接收的外力(例如SAT(自动调心扭矩))和由转向单元中产生的粘性摩擦引起的内部阻力等构成,并且这两个 力在外力和内部阻力计算部分分离。 在分离这两个力时,假设外力是侧滑角的函数,内部阻力是转向角速度的函数,并且获得了功能系数。 基于如此计算的内部阻力,马达控制部分控制马达以产生足够的辅助力。