The Simulation Of Controllability And Stability Of Tractor Semitrailer And Its Braking Performance Based On Trucksim

With the rapid development of the material circulation industry, people focus onthe performance of vehicles more and more strictly. Especially, the safetyperformance is key content. The Tractor Semi-Trailer with its hang volume, highefficiency and low cost advantages, has been one of the indispensable vehicles in thepeople life. However, with the increase of possession and extensive using, the trafficaccidents of the Tractor Semi-Trailer was large accounts.In the total number ofserious accidents, it is increasing. The accidents make the great economic losses,forcing people to research its handling stability and driving safety comprehensiveperformance. The Tractor Semi-Trailer handling stability and braking research hasbecome one of the important research subject.Compared with the ordinary truck, the force of Tractor Semi-Trailer is morecomplex. The limited conditions of real test are very risk to realize. So, the virtualtechnology has been widely used in the development of vehicle performanceevaluation and optimization analysis, the simulation experiment based on computersoftware has become a very important research means.First， the dynamics analysis on chassis system is researched, then SIMULINKmodel is set up on the key influences of chassis system, then TRUCKSIM software isused to do some tests, including of double lane changing, the brake test in onedirection and the brake test simulation in the curve. Finally, as the comparison of theevaluation indices, it analyzed the effects of structure parameters and use parameterson the vehicle performance.Through to the target vehicle simulation test, it can be known that the heavilyloaded vehicles at high speed of the driving conditions, which shows good steeringstability and braking stability performance. But in turning, braking condition, the evaluation index of tractor and trailer show different performance. Turning out that itis dangerous in this condition, we must avoid it appears as far as possible.In the test, the key parameters influencing on the vehicle steering stability andbraking stability include the lateral stiffness parameters, hitch performance parametersand axle space, etc.Through the analysis of evaluation indexes, it could be drawn that the suspensionthat the lateral stiffness parameters and hitch performance parameters have certaineffect on the controllability and stability. At the same time, the influence of thestructure parameters on steering stability and the brake is great. Through thesimulation test, it may match more reasonable parameter values to increasing thestability.