Automobile steering stability control system and automobile steering stability control method

Abstract

The invention discloses an automobile stability control system and an automobile stability control method. The system comprises a rack and pinion steering gear, an assisted motor, a worm and gear pair, a steering motor, a dual-planet-row gear mechanism, an electronic control unit (ECU), a steering wheel torque sensor, a steering wheel angle sensor, an automobile speed sensor, a yaw velocity sensor, a side slip angle sensor, a lateral acceleration sensor and a front wheel angle sensor. In the running process of an automobile, all sensors acquire measured signals in real time, the measured signals are sent to the ECU, the ECU runs a preset program to process the measured signals, and an angle displacement signal and a torque signal are output to the steering motor and the assisted motor to drive the dual-planet-row gear mechanism and the worm and gear pair, so as to finally control the motion of front wheels of the automobile, thereby realizing control on the yawing motion of the automobile. The control system and the control method, disclosed by the invention, can realize real-time control on the yawing motion of the automobile so as to improve the running stability and safety of the automobile.

Description

technical field [0001] The invention relates to the field of automobile intelligent steering, in particular to an automobile steering stability control system and a control method thereof. Background technique [0002] The stability of the car refers to the ability of the car to maintain stable driving against various disturbances such as external forces or external moments that attempt to change its driving trajectory when the driver gives the car a driving direction by manipulating the steering wheel. The quality of vehicle stability will directly affect the quality of its maneuverability. The loss of stability will often cause the driver to lose control of the vehicle, making the dynamic behavior of the vehicle unpredictable and causing serious traffic accidents. [0003] The active front wheel steering system can control the size of the steering ratio according to the vehicle speed through the superposition of the steering angle to realize the ideal steering transmission...

AI Technical Summary

Problems solved by technology

On the other hand, the car often encounters various unexpected situations during driving, such as changes in the adhesion coefficient of the road surface, side wind interference, etc. These external disturbances will have a huge impact on the driving stability of the car, and drivers generally cannot Make timely and accurate corrections to this

In addition, the non-linear characteristics of tires will also affect the driving characteristics of the car. When the car is running in the non-linear range, it will be difficult for the driver to control the car according to his will

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