Vehicle ACC system attitude control method and system based on electronic control air suspension

Abstract

The invention discloses a vehicle ACC system attitude control method and system based on an electronic control air suspension. The method comprises the following steps: collecting pitching and pitching movement parameters generated by a vehicle body during the acceleration or braking of a cruising vehicle through an ACC system, obtaining a real-time expected additional pitching moment value of the vehicle through a sliding mode control algorithm, and carrying out the distribution through a force distributor, finally, the expected additional vertical force of the suspension is achieved through inflation and deflation of the electric control air suspension system, then the pitching-resisting moment is synthesized, and vehicle body posture unbalance is restrained. According to the method, simple and feasible principles and strategies can be applied, the feasibility is good, the vehicle body attitude pitch angle change under the cruise working condition can be effectively improved, the vertical and pitch acceleration of the vehicle body is reduced, and the vehicle driving smoothness and the driving comfort are improved.

Description

technical field [0001] The invention relates to an attitude control method and system of an ACC system of a vehicle based on an electronically controlled air suspension, and belongs to the technical field of intelligent assisted driving of automobiles. Background technique [0002] With the continuous improvement and development of advanced driver assistance systems, ACC systems have been widely used in the field of vehicle automatic and semi-automatic driving. Its working principle is: in the process of following the car, the ACC system will send out acceleration and braking signals according to the workshop-related information collected by the radar equipment, such as the distance and relative speed, and control the driving and braking system of the vehicle, so as to realize the Adaptive variable speed operation. However, due to the transfer of the longitudinal load of the vehicle during acceleration and braking, the vehicle will be unbalanced, resulting in "head up" and ...

AI Technical Summary

Problems solved by technology

However, due to the transfer of the longitudinal load of the vehicle during acceleration and braking, the vehicle will be unbalanced, resulting in "head up" and "nodding" phenomena, which will have a certain impact on the comfort of the drivers and passengers on the vehicle

Leading to a decrease in users' trust in the ACC system, or even abandoning the intelligent assisted driving system

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