Vehicle suspension control method based on virtual damper

Abstract

The invention discloses a vehicle suspension control method based on a virtual damper. A control unit calculates difference of sprung mass acceleration and wheel mass acceleration according to the sprung mass acceleration and the wheel mass acceleration, and integration of difference is obtained so that a relevant motion speed value delta of sprung mass relative to wheel mass is obtained; strategy control power F0 is calculated via a control strategy; virtual damping power Ccdelta is preset in the control unit and c is a damping value of the virtual damper, the sum of the virtual damping power Ccdelta and the strategy control power F0 is obtained, integral control power F, which is required to be outputted, of the control unit is obtained, and the integral control power F is inputted to a suspension control power generator to generate actual suspension control power; virtual positive damping power is obtained after traditional base value damping is virtualized, and energy consumption of a real base value damper is eliminated; and the virtual damper cannot be limited by the real base value damper and is flexibly and optionally matched or optimized according to change of running work conditions of a vehicle.

Description

technical field [0001] The invention belongs to the technical field of vehicle suspension control, in particular to a control method for vehicle active suspension and semi-active suspension. Background technique [0002] As an important structural and functional part of a vehicle, the suspension has a significant impact on the overall performance of the vehicle. Vehicle suspension can be divided into passive suspension, semi-active suspension and active suspension according to its working principle. The passive suspension is mainly composed of springs, shock absorbers, etc. The vibration energy between the vehicle axle and the body mass is consumed through the fixed viscous damping of the shock absorber to obtain the vibration reduction effect. The fixed stiffness and damping of the passive suspension are difficult to meet various requirements. Vibration reduction requirements. Semi-active suspension is to transform the shock absorber with constant damping value of passive...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages of existing active suspensions that the base value damping elements are set in the structure lead to high energy consumption, and the existing semi-active suspensions have limited performance improvement due to the setting of base value damping elements in the structure, the present invention provides a virtual damping based In addition to the traditional active suspension or semi-active suspension control force, a virtual positive damping force provided by virtual damping is added to cancel the actual base value damping element and reduce the active suspension work. consumption and improve the control effect of semi-active suspension

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