Fuzzy control system and method for interconnection state of transverse interconnected air suspension

Abstract

The invention discloses a fuzzy control system and method for an interconnection state of a transverse interconnected air suspension, and belongs to the field of vehicle air suspension systems. According to the fuzzy control system and method, an integrated fuzzy-PWM interconnected control algorithm ECU is composed of a data processing module, a fuzzy logic controller and a PWM controller which are sequentially connected in series; unsprung mass accelerated speed is output to a road surface recognition module through an unsprung mass accelerated speed acquisition module; vehicle speed is obtained and correspondingly transmitted to the road surface recognition module and the fuzzy logic controller through a vehicle speed acquisition module; lateral accelerated speed is output to the data processing module through a lateral accelerated speed acquisition module; the road roughness coefficient is calculated and supplied to the data processing module through the road surface recognition module; the product of an adjustment factor and the lateral accelerated speed is output through the data processing module; and a break-make ratio is output through the fuzzy logic controller. According to the fuzzy control system and method for the interconnection state of the transverse interconnected air suspension, the interconnection state of the transverse interconnected air suspension is reasonably controlled, and the driving smoothness of the vehicle is improved.

Description

technical field [0001] The invention relates to the field of vehicle air suspension systems, in particular to a horizontally interconnected air suspension interconnection state control system. Background technique [0002] The air suspension uses air springs as elastic components, which can obtain a lower natural frequency of the suspension system, and when the load changes, the natural frequency of the system does not change much, thereby improving the ride comfort of the car; on the other hand, the air suspension The vehicle actively controls the distance between the vehicle body and the ground through the inflation and deflation of the air spring to meet the height requirements of the vehicle body in special working conditions. [0003] The interconnected air suspension is based on the traditional air suspension, and uses pipelines to connect the air springs in the air suspension, which can be interconnected horizontally or vertically. The horizontal interconnection is t...

AI Technical Summary

Problems solved by technology

However, this control system only considers the two states of both on and off in the combination of the front axle interconnection state switch and the rear axle interconnection state switch, and only considers the two corresponding steering wheel angles as turning and non-turning. Working conditions, it fails to fully utilize the full combination ability of the interconnected state of the front and rear axles, and at the same time, the consideration of turning conditions is too simple, which greatly weakens the adaptability of the control to changing conditions, and the control is not precise enough

Images