Application Of Uncertainty Theory In The Reproduction Of Automobile-Tricycle Collision Accidents

The reproduction of traffic accidents has always been a very important part of the division of road traffic responsibilities.In recent years,with the maturity of automobile collision accident reduction technology,the research on reproducing vehicle speed based on uncertainty theory based on PC-Crash simulation software has also stood out in the field of accident reproduction.At present,the research results of reproducing vehicle speed based on uncertainty theory cover collisions between cars and cars,collisions between cars and two-wheelers,and collisions between cars and pedestrians.Tricycle,as a popular means of travel today,but it usually plays a vulnerable role in traffic accidents,coupled with the fact that tricycle drivers are mostly elderly,and because of its relatively weak resistance and driving stability,tricycle accidents have a high mortality rate and will cause a lot of property damage.Therefore,this paper applies uncertainty theory combined with PC-Crash simulation software to reproduce and restore the accident for the collision accident of auto-tricycle collision,which provides a more reliable evaluation method for improving the traffic accident reconstruction system,which has important research significance and high practical application value.Firstly,in order to make a clearer rational analysis of the collision accident of automobile tricycle,the structural characteristics and functional characteristics of the tricycle itself are summarized,and then the accident characteristics of the tricycle are studied according to its accident characteristics and eight causes of the accident are expounded,and the analysis of the entire collision process is completed by the above research based on the three main collision types of accidents.Subsequently,based on the differences in the collection of real accident scene information,in order to improve the pre-collision speed estimation system,five vehicle speed calculation estimation models were established,and the scope of application of each model was clarified to improve its practicality.Secondly,in order to improve the accuracy and accuracy of the above collision speed estimation model,the uncertainty theory is introduced.According to the collision speed estimation model established in this paper,the uncertainty of the parameters and the vehicle speed estimation results in the model is evaluated,and the best value range of the vehicle speed at the collision time is obtained,so as to improve the accuracy of the vehicle speed calculation when the relevant parameters of the crash speed estimation model proposed in this paper cannot be accurately collected.Then,since the collision speed estimation model obtained after using uncertainty theory can only obtain the speed at the time of collision,it is proposed to use PC-Crash simulation software to simulate and reproduce the whole process of collision accident,describe the reconstruction method and content of PC-Crash software,and introduce its advantages and simulation steps.PC-Crash software can view the movement status of the vehicle at any time through the 3D window,and can highly restore the trajectory of the car tricycle at the time of the incident,providing a reliable basis for accident reproduction.Finally,through five real car-tricycle accident cases,this paper uses the vehicle termination position-energy conservation law-driver’s human throwing distance-vehicle braking time coordination factor-scattered object throwing distance-collision speed model to calculate the instantaneous collision speed,and uses the evaluation of uncertainty theory above to estimate the optimal collision vehicle speed range based on actual data.PC-Crash is used to simulate and verify,and the results show that the systematic error is maintained within the error range of 5%,which proves the reliable effectiveness of the vehicle speed model and uncertainty theory method in the collision accident of automobile and tricycle.