Pavement concave-convex degree adaptive adjustment steering method and system

Abstract

The invention provides a pavement concave-convex degree adaptive adjustment steering method and system. The pavement concave-convex degree adaptive adjustment steering system comprises an environmentsensor, a controller and a power-assisted steering system, wherein the controller comprises a processor and a memorizer, and the processor is used for realizing instructions stored in the memorizer according to the following steps: 1) acquiring pavement situations detected by the environment sensor; 2) judging the concave-convex degree of a pavement; and 3) adjusting a damping coefficient of the steering system according to the concave-convex degree of the pavement. The sensor can acquire the pavement situations, and the processor in the controller generates a depth map and a vertical view forthe pavement according to information acquired by the sensor, evaluates the pavement situations through a concave-convex degree evaluation function, and confirms steering control parameters. When a driver does not control steering or steering torque is not enough, the controller sends out a signal to the power-assisted steering system, adjusts the steering control parameters, and guarantees steering stability and flexibility of a vehicle. The pavement concave-convex degree adaptive adjustment steering method and system solve the problem that unstable vehicle driving is caused due to the factthat driver does not react in time in steering.

Description

Technical field [0001] The invention belongs to the technical field of automobile steering systems, and in particular relates to a method and system for adaptively adjusting the road surface unevenness. Background technique [0002] At present, most cars still use hydraulic power steering system. The power-assisted characteristics of this steering system are fixed, that is, the power-assisted power of the steering system is not adjusted accordingly with the change of the vehicle speed. If the lightness of low-speed steering is emphasized in the design, the car is steering at high speed. At this time, due to the large steering assistance, the driver will feel unclear on the road and feel that the car is "floating", so the steering stability and driving safety of the car cannot be guaranteed; if the high-speed steering stability is emphasized, the power-assisted characteristics will be small The steering torque range is smoother, sacrificing the portability of low-speed steering to...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method and system for self-adaptive adjustment of the unevenness of the road surface, which is used to solve the problem of unstable driving caused by the driver's untimely steering response during driving in complex road conditions

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