A method for correcting abrupt torque of eps steering wheel combined with active front wheel steering

Abstract

The invention relates to a correction method of the abruptly-changed torque of an EPS (electric power steering) steering wheel integrated with active front steering. The correction method is characterized in that a conventional power current is determined according to vehicle speed information and steering wheel torque information which are collected in real time through a conventional EPS module;the conventional power current is input into an EPS correction module; at the same time, the torque compensation control gain is determined according to an AFS (active front steering) additional corner and the vehicle speed information which are collected in real time through the EPS correction module; a power correction current is determined by multiplying the torque compensation control gain bythe conventional power current; the power correction current is input into a current closed-loop control module; the control voltage of a power motor is determined according to the deviation betweenthe input power correction current and the actual current of the motor through the current closed-loop control module; then the compensation control of the abruptly-changed torque of the steering wheel is achieved; the abruptly-changed torque of the steering wheel is controlled within an ideal range; and the correction of the abruptly-changed torque of an EPS steering wheel integrated with activefront steering is achieved.

Description

technical field [0001] The invention relates to the technical field of automobile auxiliary driving, in particular to a method for correcting abrupt torque of an EPS steering wheel combined with active front wheel steering. Background technique [0002] As one of the key systems of a car, the steering system directly affects the handling stability, comfort and driving safety of the car. According to the driver's steering operation, the traditional power steering system uses hydraulic system or electric motor to apply steering assist to reduce the driver's steering burden, but it cannot change the displacement transfer characteristics of the steering system. The active front steering system (Active Front Steering, AFS) of the car superimposes the additional rotation angle generated by the active steering motor to the steering system through the planetary gear mechanism, changing the mechanical transmission ratio of the original steering system, and giving full play to the sta...

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