Research On The Early Warning System For Automobile Driving Stability In High Speed Turning

With the rapid development of automobile industry, the pressure of our country’s road traffic safety increases sharply, in all kinds of road traffic accident, the harm degree of vehicle rollover and sideslip accidents is after the car collision accident in second. Therefore, studying the stability of the vehicle which is in the high-speed turning operating condition is good to prevent vehicle rollover and sideslip accidents. That has a very important significance in improving road traffic safety and protecting people’s lives and property.According to the vehicle dynamics theory of car road coupled system, this topic establishes a dynamic model of car turning operation conditions. Through a comprehensive analysis of the model, the key factors which influence the stability of car turning operation can be determined, so as to the relationship which is between these factors and the car’s lateral acceleration thresholds. Through the comprehensive application of electronic information and image recognition technology, this topic has designed and developed a set of data detection, data processing and forecasting warning for the integration of vehicle warning system. Based on the vehicle dynamics theory of car road coupled system, Early warning system is able to real-time detection and estimation of road adhesion coefficient, road cross slope and vehicle lateral acceleration. And it can also be able to predict the car’s instability condition when the car runs on the transverse slope or no transverse slope. In the end, it can issue a warning based on actual needs.Early warning system realizes real-time to monitor the running stability of automobile in high speed turning, and it has the ability to warn the unstable condition timely. That will help to prevent the vehicle sideslip and rollover accidents, ensure transportation safety.