Robust control system and control method for vehicle straight-line driving ability

Abstract

The invention discloses a robust control system for straight-line driving ability of an automobile, which comprises a parameter acquisition module, a parameter processing module, a controller, and an active centering module. The invention also discloses a control method of a robust control system for straight-line driving ability of an automobile, which determines the corrected steering wheel angle and the deviation of the corrected steering wheel angle by obtaining the relative angle of steering column and the operating parameters of the vehicle, obtains the relative angle of the steering wheel and judges the vehicle Whether it is in the straight-ahead state, when the vehicle is in the straight-ahead state, the active return module is turned off, and the friction torque of the steering system is adjusted through the friction compensation module to further resist the influence of external factors on the vehicle when the vehicle is in a straight line, thereby improving the straight-line driving ability of the vehicle robustness.

Description

technical field [0001] The invention relates to the technical field of automobile steering control, in particular to a robust control system for the straight-line driving capability of an automobile and a control method thereof. Background technique [0002] The straight-line driving ability of the vehicle is affected by multiple factors. First, the manufacturing deviation of the vehicle itself, the four-wheel alignment deviation, the taper force of the left and right tires, the force distribution of the left and right spring axes, the load distribution and other vehicle mechanical structural factors, and secondly, the steering system EPS active return function is involved. , coupled with the uneven external road surface, crosswinds, etc. will affect the vehicle's ability to maintain a straight line. The increase in the manufacturing deviation of the mechanical part will improve the ability of the vehicle to maintain a straight line, but it will also directly increase the ma...

AI Technical Summary

Problems solved by technology

This solution uses the traditional physical steering sensor, and increases the torque of EPS to increase the anti-interference ability. Although the interference of roads and mechanical parts is reduced, and the robustness of the vehicle is increased, it does not avoid the interference caused by the return function of EPS.

Images