Coordinated control method for vehicle roll and ride comfort

Abstract

The invention discloses a vehicle roll and smoothness coordinated control method, which adopts a shear mode magneto-rheological shock absorber as an actuator, and replaces four shock absorbers of an automobile with the magnetorheological shock absorber , and realize the roll and ride comfort control of the semi-active suspension by controlling the damping force of the magneto-rheological damper. The specific control methods include: (1) establishing the damping force-velocity characteristic curve of the magnetorheological damper; (2) Establish polynomial mathematical model of MR shock absorber; (3) Establish rolling vehicle model with six degrees of freedom; (4) Design limiting optimal controller. By designing a suitable damping force control strategy and a rational design of the limiting optimal controller, the present invention better ensures that the output control force of the shock absorber meets the requirements of optimal control, which is better guaranteed than other control methods. The effect of coordinated control of roll and ride comfort.

Description

technical field [0001] The invention relates to a method for coordinating control of vehicle roll and smoothness, belonging to the field of vehicle design. Background technique [0002] The traditional passive suspension improves the anti-rolling ability by increasing the stiffness of the suspension or the stabilizer bar, but this will reduce the ride comfort of the vehicle, and cannot meet the requirements of anti-rolling and ride comfort improvement at the same time. Active suspension can solve this problem to a certain extent, but the work of active suspension requires an additional actuator to generate the force required for control, which increases the energy consumption of the vehicle to a certain extent, and the overall structure is relatively complicated. It has a certain degree of difficulty. Semi-active suspension has low energy consumption, is easy to control, and has an effect close to that of active suspension. The traditional magneto-rheological shock absorbe...

AI Technical Summary

Problems solved by technology

The traditional magneto-rheological shock absorber semi-active suspension has low energy consumption and is easy to control. However, under the low-speed motion of the vehicle rolling motion, the magnetorheological shock absorber can provide low damping force due to the low expansion and contraction speed. Therefore it is difficult to provide effective anti-roll force

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