The Effect Of Suspension Characteristics To FSC Racing Vehicle Stability Analysis

The paper takes the front suspension of FSC racing car of North University of China asthe research object to study the influence of suspension on the vehicle steering stability.Establish a new front suspension system on the basis of the FSC of North University of Chinaand replace the original assembly of the FSC virtual prototype model. Compare the frontsuspension system using the virtual prototype model with the original model in order toanalyze the influence of suspension on the vehicle steering stability.First of all, research the related theory of steering stability.Based on that compare theclosed-loop evaluation with open loop evaluation,the steady response with transient response,the linear evaluation with nonlinear evaluation, the steady response evaluation wasintroduced in detail. Analyze the stability margin (stability factors), the difference between thefront and side Angle, acceleration/steady turning radius parameters such as the ratio of theneutral to car steering, understeer, excessive to the influence of three kinds of steady turningperformance.Secondly, this paper analyzes the deformation of the suspension movement of thesteering mechanism, body roll Angle as well as the influence of wheel alignment parameters,such as the influence of wheel alignment parameters on vehicle handling stability. Based onthe prototype car front suspension, in view of the suspension of the steering mechanism,spring decorate A form of structure optimization adjustment, adjust the suspension stiffnessand lateral Angle camber Angle, kingpin inclination Angle and king pin wheel positioningparameters such as beam before the establishment of A new front suspension system, the newfront suspension assembly out of the vehicle model (hereinafter referred to as an "A", samebelow). Because the tire characteristics, such as steering system features of the vehiclesteering stability influence is very big, in order to focus more highlights on the analysis of the effect of suspension for the vehicle steering stability, in the process of vehicle virtualprototype modeling, the rest all subsystems are new vehicle other than the front suspensionand prototype (hereinafter referred to as "B", same below), makes the simulation moretargeted.Finally, compare the performance of the newly established virtual prototype modelwith the original virtual prototype model according to the national standard GB/T6323-94for three classical experiment of the "snake", steady rotation,"8" glyph.Analyse thesuspension roll stiffness for car such as the influence of the steady state. According to QC/T480-480three experimental results of two cars, according to the score, the loading of new "A"car front suspension parameters of suspension is more advantageous to the shortage of theautomobile steering, steering stability and "A" car is much better than" B "car. Provide apowerful reference for the FSC team in North University of China.