US 12,249,196 B2
Method and system for measuring steering angle error of vehicle
Kenichiro Kurai, Tokyo (JP)
Assigned to Honda Motor Co., Ltd., Tokyo (JP)
Filed by Honda Motor Co., Ltd., Tokyo (JP)
Filed on Dec. 28, 2022, as Appl. No. 18/089,568.
Claims priority of application No. 202210148383 (CN), filed on Feb. 17, 2022.
Prior Publication US 2023/0260339 A1, Aug. 17, 2023
Int. Cl. G07C 5/08 (2006.01); B62D 15/02 (2006.01)
CPC G07C 5/0808 (2013.01) [B62D 15/021 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for measuring a steering angle error of a vehicle, comprising:
performing a rotating step, wherein the rotating step is to continuously rotate a steering wheel left and right between a left position relative to a center and a right position relative to the center when the vehicle is driving along a driving path for a predetermined distance;
obtaining a time-series change of a steering angle of the vehicle and a time-series change of a turning radius of the vehicle in the rotating step;
calculating a response delay of the turning radius at each of a plurality of time points according to the time-series change of the steering angle and the time-series change of the turning radius;
calculating a correlation expression of the turning radius according to the response delay of the turning radius at each of the plurality of time points, wherein the correlation expression corrects the response delay corresponding to the steering angle at each of the plurality of time points; and
defining the steering angle under a condition where the turning radius is 0 as the steering angle error of the vehicle based on the correlation expression.