Vehicle high-speed four-wheel steering stabilization device and control method thereof

Abstract

The invention discloses a vehicle high-speed four-wheel steering stabilization device and a control method thereof, which are characterized in that a vehicle-mounted PLC control system, a steering mode selection switch, a front wheel angle sensor, a rear wheel angle sensor, a CAN protocol, an adjustment valve and a fault The alarm device, steering mode selection switch, front wheel angle sensor, rear wheel angle sensor, CAN communication, adjustment valve and failure alarm device are respectively connected to the on-board PLC for control. When the vehicle speed V is lower than the set speed value V1, the four-wheel steering According to the conventional four-wheel method, when the vehicle speed signal V is higher than the set speed V1 but lower than the maximum set speed V2, the following angle A2 of the rear wheel is reduced; when the vehicle speed is greater than the maximum set speed V2, the follower wheel remains at The central straight mode has the advantages of smooth steering, no tail flicking, and easy control.

Description

technical field [0001] The invention relates to the technical field of special vehicle control, in particular to a vehicle high-speed four-wheel steering stabilizing device and a control method for controlling states such as flicking and instability when the vehicle high-speed four-wheel steering occurs. Background technique [0002] At present, the general vehicle four-wheel steering control method uses a feed-forward steering system to make the side slip angle of the vehicle body close to zero in the steady state, but its defect is that the sideslip speed in the transient state is increased, which brings the driver uneasy psychological burden. There are also some new control strategies, such as the delayed follower wheel following speed scheme. Although this scheme improves the stability of the vehicle at high speed to a certain extent, it will reduce the sensitivity of the vehicle's follower wheel. When the driver makes a large turn and changes direction urgently, There ...

AI Technical Summary

Problems solved by technology

[0004]1. Some of the above monitoring technologies only adopt the angle monitoring method, which can only adjust the steering attitude of the vehicle according to the difference between the front and rear wheel angles, and cannot adjust the steering attitude of the vehicle according to the vehicle speed. Carry out accurate monitoring and adjustment; although some introduce a speed link to delay adjustment of the following speed of the follower wheel, when turning at a high speed and changing direction in an emergency, the vehicle posture is unstable, prone to tail flicking, oversteering and difficult to control

[0005]2. When there is a sensor failure or speeding, the operator cannot be effectively reminded, which is prone to accidents

[0006]Because of the above-mentioned deficiencies, the operator has high requirements when using it, and the vehicle is prone to instability when driving at high speed and making four-wheel turns

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