Abstract: A control system for controlling a steering system is provided. The control system includes a first module that estimates a command adjust value based on a current position of a hand wheel of the steering system relative to an end of travel region. A second module generates a motor assist command based on the command adjust value to control the steering system.

Abstract: A control system for controlling a steering system is provided. The control system includes a first module that selectively determines a gain curve based on a position of a hand wheel of the steering system. A second module determines a motor assist command based on the gain curve.

Abstract: A control system for controlling a steering system is provided. The control system includes a first module that estimates a command adjust value based on a current position of a hand wheel of the steering system relative to an end of travel region. A second module generates a motor assist command based on the command adjust value to control the steering system.

Abstract: A power steering device includes a first gear provided on the first shaft, the first gear having a centerline axis, and a second gear operatively connected to the first gear. The second gear includes a rotational axis that is maintained substantially coplanar with the centerline axis. The power steering device further includes a compliant member operatively connected with the second gear. The compliant member allows rotational compliance of the second gear while avoiding axial and radial compliance.

Abstract: A method for controlling a steering system, the method including, receiving a first signal including a position of a component in the steering system, receiving a second signal including a disturbance signal operative to indicate an effect of a first torque disturbance in the steering system, calculating a first counter acting torque command signal operative to minimize the first torque disturbance as a function of the position of the component and the disturbance signal, and sending the first counter acting torque command signal to a motor.

Abstract: A method for controlling a power steering system, the method including, receiving a first signal, determining a velocity from the first signal, determining a scale factor from a function of the velocity, multiplying the scale factor with a damping factor, and outputting a scaled damping factor.

Abstract: A method for controlling a steering system, including, receiving a first signal representative of a torque applied to a steering wheel, receiving a second signal representative of a motor velocity of a motor operatively linked to the steering wheel, multiplying the first signal with the second signal resulting in a product signal, applying a backlash function to the product signal, wherein the backlash function imparts a defined hysteresis in the system, multiplying a defined first-third quadrant scaling factor with an active damping signal, and sending a resultant motor command signal to the motor responsive to determining that the product signal is a positive signal, and multiplying a defined second-fourth quadrant scaling factor with the active damping signal, and sending the resultant motor command signal to the motor responsive to determining that the product signal is a negative signal.

Abstract: A power steering apparatus includes a housing defining a chamber. A rack is disposed within the chamber and is moveable along a longitudinal axis. A pinion extends into the chamber for meshing engagement with the rack. A bearing supports the rack relative to the housing and is moveable relative to the housing to re-position the rack relative to the pinion. An adjustment mechanism continuously biases the bearing in response to loosening of the meshing engagement to re-position the rack. A dampener resists the movement of the bearing to slow the re-positioning of the bearing. Preferably, the dampener includes a plastic fluid having a very high viscosity. The plastic fluid is disposed between adjacent moving parts to resist the relative movement between the bearing and the housing.

Abstract: An isolation system for a ball-screw assembly including: a ball-screw; a ball-screw nut wherein the ball-screw is configured to engage the ball-screw nut, the ball-screw nut is enclosed in a ball-screw nut container; and a member disposed between the ball-screw nut and the ball-screw nut container, the member having selected properties. A method of providing a degree of freedom to a steering mechanism, the method including: selecting a member, the member having selected properties; and interposing the member between a ball-screw nut and a ball-screw nut container.

Abstract: An isolation system for a ball-screw assembly including: a ball-screw; a ball-screw nut wherein the ball-screw is configured to engage the ball-screw nut, the ball-screw nut is enclosed in a ball-screw nut container; and a member disposed between the ball-screw nut and the ball-screw nut container, the member having selected properties.