Steering coupled active suspension anti-rollover integrated control device and control method thereof

Abstract

The invention relates to the field of vehicle safety, in particular to a steering coupled active suspension anti-rollover integrated control device and a control method thereof. An active steering system is coupled with an active suspension system for integrated control, a control unit calculates and analyses the data through collecting a body roll angle, control instructions are output to a steering controller and a suspension controller according to the results, so that the active steering system and the active suspension system can start up to resist rollover, and the active safety index and rollover resistance of vehicles under normal and extreme conditions are improved through reasonable moment distribution. The anti-rollover integrated control device implements hierarchical integrated control on the basis of establishing an anti-rollover dynamic model of an active steering coupled active suspension, has better anti-rollover effect than a single anti-rollover control device, andcan effectively reduce traffic accidents caused by the rollover of vehicles under the conditions of large radius turning, obstacle avoidance and the like.

Description

technical field [0001] The invention relates to the field of automobile safety, in particular to a steering coupling active suspension anti-rollover integrated control device and a control method thereof. Background technique [0002] Minibuses generally have the characteristics of small wheelbase, high center of gravity, and low suspension stiffness, which make them more prone to rollover accidents when driving on the road. Anti-rollover of a single control system, many experts and scholars have carried out relevant research, different anti-rollover control of a single system has different advantages and disadvantages, such as differential braking, can be based on anti-lock braking system ABS or electronic The controller is designed by mechanical brake EMB, etc., which is easy to implement and low in cost, but the anti-rollover effect is limited; for the active anti-rollover bar, the anti-rollover effect is better, but the system is complicated and the cost is high; the act...

AI Technical Summary

Problems solved by technology

[0002] Minibuses generally have the characteristics of small wheelbase, high center of gravity, and low suspension stiffness, which make them more prone to rollover accidents when driving on the road

Anti-rollover of a single control system, many experts and scholars have carried out relevant research, different anti-rollover control of a single system has different advantages and disadvantages, such as differential braking, can be based on anti-lock braking system ABS or electronic The controller is designed by mechanical brake EMB, etc., which is easy to implement and low in cost, but the anti-rollover effect is limited; for the active anti-rollover bar, the anti-rollover effect is better, but the system is complicated and the cost is high; the active suspension anti-side The anti-rollover torque is large, and the anti-rollover effect is good, which is suitable for various vehicles, but additional hardware is required, the cost is high, and the time lag of the electro-hydraulic suspension is too long. At the same time, the lateral acceleration is reduced, but the vehicle's turning ability and lane keeping ability are reduced, and the driver's driving intention is changed, so that the car cannot effectively avoid obstacles

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