Automobile rollover prevention method based on model predictive control

Abstract

The invention discloses an automobile rollover prevention method based on model predictive control. The automobile rollover prevention method based on the model predictive control comprises the following steps that firstly, front wheel rotation angle, vehicle speed, yaw rate and lateral position of a vehicle are measured; then the lateral load transfer rate of the vehicle is calculated; then, thelateral load transfer rate is compared with a preset lateral load transfer rate threshold, the difference between the lateral position and a preset reference lateral position is compared with a presetmaximum difference threshold value, the front wheel rotation angle of the vehicle is adjusted according to the comparison result of the two, and the braking force of four wheels is controlled. According to the automobile rollover prevention method based on the model predictive control, different influences of the sprung mass and the unsprung weight on the rollover of a vehicle body are considered, and a more accurate effect is achieved on the rollover prevention control effect.

Description

technical field [0001] The invention relates to the technical field of automobile active safety, in particular to an automobile rollover prevention method based on model predictive control. Background technique [0002] With the development of the economy, the number of cars in the world continues to increase, the roads become congested, and the danger of car travel becomes greater. Therefore, people pay attention to the comfort and economy of cars, but also turn their attention to safety. Among all automobile safety accidents, there is a type of accident whose incidence rate is not high, but the probability of death or injury is quite high. The survey report of the National Highway Traffic Safety Administration (NHTSA) shows that in 2014, the number of deaths caused by rollover accidents accounted for one-third of all traffic accident deaths that year, and the number of deaths due to rollover accidents was 7659. more than other models. [0003] At present, the anti-rollo...

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Problems solved by technology

[0004] However, most of the above-mentioned control methods only focus on the body posture when preventing rollover, and achieve the anti-rollover effect by controlling the body, and then ignore the control effect produced by it, which may cause the vehicle to deviate from the original path or drive into other places. The lane then produces secondary collisions, or other hazards, which violate the driver's intention and control intention, so there is still room for improvement

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