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Method for estimating steering wheel torque of vehicle

A steering wheel and torque technology, applied in the field of estimating the steering wheel torque of the vehicle, can solve the problems of different and difficult to accurately estimate the driver's steering wheel torque.

Active Publication Date: 2019-06-21
HYUNDAI MOTOR CO LTD +1
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  • Summary
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Problems solved by technology

[0006] However, when the driver actually turns the steering wheel, the torque sensed value of the torque sensor based on the nonlinear characteristics of the mechanism and the driver's steering wheel torque (the driver's steering intention) may vary depending on the torque sensor in the electric power steering. varies by location in the system
Therefore, when the electric power steering system is controlled based on the torque sensing signal from the torque sensor, it is difficult to accurately estimate the driver's steering wheel torque (the driver's steering intention)

Method used

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  • Method for estimating steering wheel torque of vehicle
  • Method for estimating steering wheel torque of vehicle
  • Method for estimating steering wheel torque of vehicle

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Embodiment Construction

[0020] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Embodiments of the invention may configure a driver torque estimator that takes into account the actual driver steering wheel torque T when the driver turns the steering wheel driver and the torque T sensed by the torque sensor as the driver's steering wheel torque sensor The difference between the actual driver steering wheel torque is estimated using the state variables of the components included in the steering system modeling such that the estimated driver steering wheel torque T driver with the torque sensed by the torque sensor T sensor The difference between can be used to compensate the target steering torque input to the feedback controller of the electric power steering system, and the steering force of the electric power steering system can be accurately assisted.

[0022] figure 2 is a view showing a method for estimating...

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Abstract

A method of operating a motor vehicle includes sensing a sensed torque based on a driver interaction with a steering wheel that is part of an electric power steering system, the sensed torque being sensed using a torque sensor, calculating driver steering wheel torque using state variables of a steering system model based on the electric power steering system, and controlling a difference betweenthe driver steering wheel torque calculated from the steering system model and sensed torque sensed by the torque sensor to converge to zero through a controller.

Description

technical field [0001] The invention relates to a method for estimating the steering wheel torque of a vehicle. Background technique [0002] An electric power steering system (for example, a motor drive power steering or MDPS system) is a vehicle speed-sensitive power steering device for varying steering force based on driving speed. In this system, the ECU of the electric power steering module provides the driver with an optimal steering feel by controlling the steering angle and the operation of the motor based on the vehicle speed. [0003] An MDPS system as an example of an electric power steering system is classified into a column type (in which a motor is mounted on a steering column) and a rack type (in which a motor is mounted on a pinion rod connected to a steering shaft). [0004] The electric power steering system calculates a driver's intention to turn a steering wheel (driver torque) based on a torque sensing value of a torque sensor for sensing the torque of ...

Claims

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Application Information

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IPC IPC(8): B62D5/04
CPCB62D6/10B60W40/00B60W2510/202G06F30/17
Inventor 成宇济李钟昊曹承范
Owner HYUNDAI MOTOR CO LTD
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