Vehicle electric steering device and method for controlling steering angle thereof

Abstract

The invention provides a steering angle control method of an electric steering device of a vehicle, comprising: a steering angle control execution step, following the input of the steering torque, the PI controller executes the steering angle control; a judging step, judging whether the steering angle error is a reference error value, and whether the steering angular velocity is below the reference angular velocity; the pulse torque input step, when the determination result of the determination step is that the steering angle error is above the reference error value, the steering angular velocity is the reference angular velocity When below, input the pulse torque. The present invention applies a pulse torque value in a stop section in which no torque value is applied during steering angle tracking and there is no change in the steering angle, thereby improving responsiveness without causing a sense of alienation to the driver.

Description

technical field [0001] The present invention relates to an electric steering device for a vehicle, and more particularly relates to an electric steering device for a vehicle that improves a static friction zone by using pulse torque during tracking control of a target steering angle and a control method thereof. Background technique [0002] There is Korean Laid-Open Patent Application No. 2011-67197 as a conventional technology related to an electric steering device for a vehicle. [0003] Korean Published Patent Application No. 2011-67197 relates to a lane keeping method and system, which is characterized in that the input steering torque signal is converted into a pulse modulation signal, and the steering torque signal converted into a pulse modulation signal is output to the steering system for Steering torque control. [0004] For this reason, the lane keeping system disclosed in Korean Laid-Open Patent Application No. 2011-67197 includes: a lane departure detection un...

AI Technical Summary

Problems solved by technology

[0005] As described above, in the conventional lane keeping system, since the steering torque input value converted into the form of the pulse modulation signal is used in the entire interval, the pulse modulation signal is also applied in the interval where the pulse modulation signal is not required, causing Vehicle chassis load

[0006] In addition, pulse modulation has a high torque of 4Nm, so there is a disadvantage that the driver feels a strange feeling

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