Apparatus and method for compensating for steering angle signal and motor angle signal of MDPS system
AssigneeHyundai Mobis Co., Ltd.
InventorsCheon Kyu Kim, Ji Hoon Yoo
Life of this patent
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Abstract
An apparatus for compensating a steering angle signal and motor angle signal of an MDPS system may include: a motor torque compensator configured to compensate for mechanical deformation; an angular speed compensator configured to compensate for a difference between a steering angle and a motor angle; a sensor characteristic compensator configured to compensate for a steering position error of the steering angle sensor; and a hysteresis compensator configured to compensate for a hysteresis characteristic of the MDPS system.
Claims8
An apparatus for compensating a steering angle signal and motor angle signal of an MDPS (Motor-Driven Power Steering) system, comprising:
- a motor torque compensator configured to compensate for mechanical deformation caused by a material between a steering angle sensor and motor angle sensor of the MDPS system, by applying a current compensation value to a current for controlling a motor that drives the MDPS;
- an angular speed compensator configured to compensate for a difference between a steering angle and a motor angle by an angular speed of the motor, based on the angular speed;
- a sensor characteristic compensator configured to compensate for a steering position error of the steering angle sensor depending on a steering position, based on the steering position and a steering direction;
- and
- a hysteresis compensator configured to compensate for a hysteresis characteristic of the MDPS system by applying a hysteresis compensation value to the steering angle signal, when the steering condition of a vehicle is changed from a constant-steering state to a steering state or the steering direction is changed,
- wherein the angular speed compensator calculates a compensation amount for the difference between the steering angle and the motor angle by multiplying the angular speed by a signal delay amount.
A method for compensating a steering angle signal and motor angle signal of an MDPS (Motor-Driven Power Steering) system, comprising:
- compensating for, by a compensation unit, mechanical deformation caused by a material between a steering angle sensor and a motor angle sensor of the MDPS system, by applying a current compensation value to a current for controlling a motor that drives the MDPS;
- compensating for a difference between a steering angle and a motor angle by an angular speed of the motor, based on the angular speed;
- compensating for a steering position error of the steering angle sensor depending on a steering position, based on the steering position and a steering direction;
- and
- compensating for a hysteresis characteristic of the MDPS system by applying a hysteresis compensation value to the steering angle signal, when the steering condition of a vehicle is changed from a constant steering state to a steering state or the steering direction is changed,
- wherein, in the compensating for the difference between the steering angle and the motor angle, the compensation unit calculates a compensation amount for the difference between the steering angle and the motor angle by multiplying the angular speed by a signal delay amount.
A method for compensating a steering angle signal and motor angle signal of an MDPS (Motor-Driven Power Steering) system, comprising:
- compensating for, by a compensation unit, mechanical deformation caused by a material between a steering angle sensor and a motor angle sensor of the MDPS system, by applying a current compensation value to a current for controlling a motor that drives the MDPS;
- compensating for a difference between a steering angle and a motor angle by an angular speed of the motor, based on the angular speed;
- compensating for a steering position error of the steering angle sensor depending on a steering position, based on the steering position and a steering direction;
- and
- compensating for a hysteresis characteristic of the MDPS system by applying a hysteresis compensation value to the steering angle signal, when the steering condition of a vehicle is changed from a constant steering state to a steering state or the steering direction is changed,
- wherein, in the compensating for the hysteresis characteristic, the compensation unit calculates the hysteresis compensation value using a left direction error map of the steering position error and a right direction error map of the steering position error.
Dependencies are inferred from the claim text.