Control method of automobile air suspension

Abstract

The invention discloses a control method for a vehicle air suspension; the invention takes the electric control device of a hardware part as the core and is configured with components such as various external sensors, an air spring, an air valve, and an adjustable shock absorber, and the like; the software part comprises signal detection, data processing and secondary calculation, a control method and control output; and firstly different working models are judged by calculating the variance of the input vehicle body height and the vehicle speed; open-loop control and a neural network are used for realizing online self-correction function; the electric control device controls the implementation of the air valve according to the air charge and discharge time which is obtained by the neural network, and then the air molar concentration and the deviation quantity in the spring are obtained by calculation; and finally a detail control signal is obtained. The control method causes the vehicles to be controlled flexibly under different pavement conditions, has appropriate flexibility and damping performance under various road conditions, effectively solves the conflicts when parameters are matched to be suitable for various road conditions, and improves the handling performance, the safety, the comfort and the off-road performance of the vehicles.

Description

technical field [0001] The invention relates to the fields of automobiles, detection technology, automatic devices, automatic control theory and the like, and is an electronic measurement and control method for the air suspension of automobiles. Background technique [0002] The traditional vehicle air suspension system is mainly composed of springs, shock absorbers, and guide mechanisms. Its stiffness can only be changed passively according to the change of the height of the air spring. The height change of the vehicle will change the suspension bias frequency of the vehicle and destroy the handling stability of the vehicle. The shock absorber usually adopts a fixed structure and can only maintain the damping coefficient determined during its design. These characteristics affect the driving performance and operation performance of the vehicle, so that the ride comfort and operation stability cannot be satisfied at the same time. body forces instead of actively controlling...

AI Technical Summary

Problems solved by technology

This method does not really actively control the spring stiffness and shock absorber damping force, and its ride comfort is greatly restricted

[0010] (3) The stiffness of the air spring is related to its internal pressure and volume. In order to control it, the traditional method can only adjust the stiffness by changing its volume. This method can only achieve two-stage stiffness switching

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