Whole vehicle dynamic performance control method and system based on road adhesion coefficient recognition

Abstract

The invention discloses a whole vehicle dynamic performance control method and system based on road adhesion coefficient recognition, and provides a global control strategy capable of improving transverse and longitudinal dynamic performance of a whole vehicle by comprehensively considering a cooperative work mechanism of subsystems of the vehicle and a transverse and longitudinal coupling influence mechanism of vehicle dynamics aiming at a traditional power four-wheel drive vehicle. A modern control theory and vehicle dynamics are combined, an agile dynamics control method is used, agility, smoothness and control stability of the whole vehicle in a curve under different road surfaces are improved, and a driving experience of a driver is improved. Compared with the prior art, the method and the system have the advantages that whole vehicle steering response of a daily use condition of a user can be improved; safety, driving stability and turning smoothness of the vehicle are improved;meanwhile, the method and the system can be used for optimizing an automatic driving vehicle control technology by referring to the field of automatic driving vehicle control, and particularly can beused for coupling control in the curve.

Description

technical field [0001] The invention relates to the technical field of vehicle dynamic performance control, in particular to a global control strategy for improving the driving performance of a curved vehicle based on the road surface adhesion coefficient. Background technique [0002] Since the mid-1980s, some well-known automobile manufacturers and researchers at home and abroad have successively carried out research on chassis integrated control and achieved many research results. Different chassis integrated control methods provide a variety of vehicle control strategies, and various algorithm schemes make the performance of the vehicle improved to varying degrees. For example, the dynamics integrated management system installed in some existing commercially available models can maximize the integration of the chassis control system from the two levels of software and hardware, and integrate driving, braking and steering control. It realizes the improvement of the dynam...

AI Technical Summary

Problems solved by technology

However, in the current prior art, less consideration is given to the identification of the maximum road surface adhesion coefficient under the normal driving conditions of the vehicle, so the dynamics of the overall vehicle control strategy provided are obviously insufficient, so that it is not suitable for the vehicle Adaptability to actual driving conditions still has insurmountable shortcomings

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