Steering wheel angle correction method and device

Abstract

The invention discloses a steering wheel angle correction method and device, and the method comprises the steps: collecting a first angle signal through a steering wheel angle module, and storing thefirst angle signal in a first angle module; collecting vehicle working conditions, judging whether the vehicle runs linearly or not according to the vehicle working conditions, if yes, collecting a second angle signal through the steering wheel angle module, storing the second angle signal in a second angle module, and if not, continuing to collect the vehicle working conditions; calculating the second angle signal and the first angle signal through a motor control module, and calculating a system return value. The method has the advantages that the straight driving state of the vehicle can bedynamically measured, the steering wheel angle signal is recalculated, and the straight driving capacity determined by the vehicle is guaranteed.

Description

technical field [0001] The invention relates to the field of automobile chassis, in particular to a steering wheel angle correction method and device. Background technique [0002] In the development of automobiles, the steering system has gone through four development stages: from the initial mechanical steering system to the hydraulic power steering system, and then the electronically controlled hydraulic power steering system and electric power steering system appeared. [0003] The electric power steering system (Electric Power Steering) has been widely used in passenger cars now. The basic principle of the electric power steering system is: the torque sensor is connected with the steering shaft (pinion shaft), and when the steering shaft turns When the torque sensor starts to work, it converts the relative rotational angular displacement of the input shaft and the output shaft under the action of the torsion bar into an electrical signal and transmits it to the ECU (on-...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the current technology can only calibrate the angle sensor to obtain accurate angle signals so as to ensure performance, but this method can only ensure the stability of new cars running straight ahead. For vehicles that have been used for a period of time, The mechanical parts of the steering system are worn out and cannot be compensated, and then active deviation occurs. A steering wheel angle correction method and device are provided. The steering wheel angle correction method includes:

Images