Auto steering control method and system based on magnetorheological technique

Abstract

The invention provides an auto steering control method and a device based on a magnetorheological technique; the method is realized by installing a magnetorheological damping device on an auto steering system, and the magnetorheological damping device comprises a rotor, a stator, magnetorheological fluid and a coil; the rotor of the magnetorheological damping device rotates with a steering shaft of a pinion and rack steering system, the magnetorheological damping device is controlled by a magnetorheological controller, and the magnetorheological controller receives signals from a torque sensor and a vehicle speed sensor, computes target current according to an assistance characteristic law, inputs the signals to a drive circuit to change the current and outputs the signals to the magnetorheological damping device to change a magnetic field of the magnetorheological damping device; and the device provides a suitable damping force and ensures stability of steering. The method and the device are favorable to solving a problem of a steering wheel 'out of control' while the auto runs at high speed. Compared with a hydraulic EPS and an electric control EPS, the device has advantages of simple structure, low energy consumption, high reliability, rapid response system and the like.

Description

technical field [0001] The invention relates to an automobile steering system, in particular to a steering system using a magneto-rheological damping device to control steering torque. Background technique [0002] The magnetorheological body is composed of a non-magnetic liquid and small soft magnetized grains with high magnetic permeability and low magnetic hysteresis uniformly dispersed in it. Under the action of a magnetic field, it can transform from a Newtonian fluid with good fluidity to a Bingham plastic with high viscosity and low fluidity in milliseconds, and this transformation is reversible. The mechanical properties of magnetorheological fluid vary with The magnetorheological damping device made of magnetorheological material has excellent characteristics such as low power consumption, large damping force, fast response speed, simple structure, and continuously adjustable damping force. Therefore, it has a wide range of applications in the automotive field. ...

AI Technical Summary

Problems solved by technology

The hydraulic EPS system has complex structure, high energy consumption, low reliability and easy failure

Compared with the hydraulic EPS, the electronically controlled EPS abandons the hydraulic system and the hydraulic system, and has a compact structure and is easy to arrange; due to the use of electronic control technology, the steering performance can be optimized, and the follow-up and safety can be enhanced, but correspondingly, its price is also low. more expensive

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