H-infinite PID-based active suspension rack control system and control method

Abstract

The invention discloses an H-infinite PID-based active suspension rack control system and control method. The control system comprises an inner ring and an outer ring, wherein the inner ring comprises a vehicle, a vertical vibration accelerometer and a suspension rack controller; the outer ring comprises a current controller and an actuator. H-infinite control of an active suspension rack can be realized via a main ring according to different pavement excitation, and expected active force can be realized via an inner ring control actuator. Corresponding parameters of PID control can be obtained via H-infinite control theories, and the active suspension rack is enabled to work in an optimal state all along. According to the active suspension rack control system and control method, three parameters of the PID control can be obtained via H-infinite control theories, a problem that good PID control effects can be exerted but parameter debugging is difficult can be well solved, and ideal control effects can be reached on different pavements.

Description

technical field [0001] The invention belongs to the technical field of vehicle suspension, in particular to a suspension system based on H ∞ PID active suspension control system and its control method. Background technique [0002] Suspension is generally composed of elastic elements, shock absorbers and guide elements. It is one of the important components on the vehicle and is the general term for all force transmission connection devices between the body and the axle or wheels. [0003] During the driving process of the vehicle, various impact loads caused by the undulating road surface are transmitted to the vehicle body, causing vibration, pitch and roll of the vehicle body. The function of the suspension is to elastically connect the axle and the frame, and quickly attenuate the road surface The impact of the car body, absorbing the vibration of the car body, enhancing the grip performance of the tires on the ground, thereby ensuring the integrity of the cargo and imp...

AI Technical Summary

Problems solved by technology

[0005] However, the existing active suspension control system has limited ability to suppress road excitation, and its robust performance is also limited. In order to further improve the performance of the active suspension, the PID control is combined with the H∞ control theory, and the closed-loop system is used to satisfy the H∞ To calculate the optimal PID parameters and then perform closed-loop control on the active suspension, it is necessary to design an active suspension control system and method that is easy to implement and suitable for various road surfaces

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