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Automobile stability control method based on tire equal backup capacity

A technology of stability control and backup capability, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of vehicle instability, not considering the optimal utilization and distribution of tires, etc.

Active Publication Date: 2020-11-20
CHANGCHUN UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0005]In order to solve the problem of vehicle instability caused by not considering the optimal use and distribution of tire longitudinal force and lateral force when the existing vehicle integrated stability control Problem, the present invention provides a stability control method based on tire equal reserve capacity

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  • Automobile stability control method based on tire equal backup capacity
  • Automobile stability control method based on tire equal backup capacity
  • Automobile stability control method based on tire equal backup capacity

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Embodiment Construction

[0135] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0136] A kind of automobile stability control method based on tire equal reserve ability, it is characterized in that, the method comprises reference model module 1, tire data processing module 2, MPC controller 3, CarSim car model 4; Reference model module 1 is used for according to driving staff input δ f,dri Calculate the reference yaw rate γ ref and the center of mass slip angle β ref The tire data processing module 2 is used to calculate the lateral force and tire state stiffness of the tire; the CarSim car model 4 is used to output the actual state quantity of the car, including car longitudinal velocity, lateral velocity, yaw rate and side slip angle of the center of mass; MPC controller 3 according to the reference yaw rate γ ref , center of mass side slip angle β ref and the actual state of the car to calculate the front wheel angle δ f ...

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Abstract

An automobile stability control method based on tire equal backup capacity is characterized in that a reference model module, a tire data processing module, an MPC controller and a CarSim automobile model are included; the reference model module is used for calculating a reference yaw velocity and a side slip angle; the tire data processing module is used for calculating tire lateral force and tire state rigidity; the CarSim automobile model is used for outputting the actual state quantity of an automobile; and the MPC controller optimizes a front wheel rotation angle and braking torques of four wheels and inputs the front wheel rotation angle and the braking torques to the CarSim automobile model to realize reasonable distribution of steering and braking control rights.

Description

Technical field: [0001] The invention relates to the field of automobile stability control, more specifically, relates to an automobile stability control method based on tire equal reserve capacity. Background technique: [0002] As the driving speed of automobiles is getting higher and higher, people are paying more and more attention to the driving stability of automobiles. Among them, the stability control method based on the integration of active front steering (AFS) and direct yaw-moment control (DYC) has been widely studied, and it is also the development direction of automotive stability control in the future. [0003] The AFS system can correct the understeer or oversteer of the vehicle through the active intervention of the front wheel angle to avoid the lateral instability of the vehicle, but when the tire lateral force is close to the adhesion limit, the control performance of AFS will also be close to the limit. At this time, the yaw moment generated by the DYC ...

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 李绍松王旭阳孙光达王书君张袅娜崔高健张邦成徐海天
Owner CHANGCHUN UNIV OF TECH
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