Study On The Vehicle Tire Blow-out Safety Control Method And System

The tire blow-out has greatly affected the vehicle's driving safety. How to reduce or prevent the harm of tire has become an important research topic today. As an important application of advanced driver assistance systems research, tire blow-out safety control system is of great significance to improve the security of driving and promote the development of intelligent transportation system in our country. Currently, most of the domestic research is in the experimental stage and the practical and integral system has not been built. In this paper, a tire blow-out warning and control system is established based on one domestic test car, and some researches are done on the key technologies of this system.Firstly on the basis of summarizing situation of study, the reasons of complex tire blow-out phenomenon are analyzed in the aspect of tires and the characteristics of the movement after tire blowing out are summarized. This paper does some further research on the tire blow-out vehicle stability control theory and the control torque of tire blow-out vehicle is calculated on the basis of a DOF vehicle dynamics model by using the linear quadratic optimal control (conventional LQR) method. It provides basic basis for the design of blow-out control strategy.Secondly, the whole vehicle dynamics model of the test car is established in the software Carsim according to the parameters of the test car. Then the blow-out vehicle dynamics simulation of the Carsim vehicle model is analysed and it lays a solid foundation for the development of the blow-out control system.In order to realize the function of tire blow-out warning and control system, the system strategy is designed and the methods and process of system development are formulated. Several key technologies including TPMS, central control system, electronic vacuum booster and lateral control system and CAN bus are developed to improve the reliability and flexibility of the platform.Finally, on the basis of the experiment result under different tire temperatures and pressures and the change of roll rate, how to establish a blowout warning and control threshold decision-making algorithm is discussed. The functions of the tire blow-out control system are investigated under different experimental conditions and the experimental results demonstrate that the tire blow-out warning and control system has good performance of tire blow-out cars.