Vehicle Roll Stability Analysis Based on Root Locus

Based on vehicle theory and dynamic analysis, vehicle dynamics model is established. By comparing different evaluation method, root locus analysis method is put forward to analyze vehicle roll stability. Combined with the principle of vehicle system dynamics and force analysis, four degree of freedom vehicle system equation is established for dynamics simulation. The dynamic model is solved by using the state equation and Mat lab software is used to program the simulation. Through the research of turning characteristic under the condition of fixed speed, and under input conditions of different steering wheel angle, yaw rate and roll angle of root locus variations were analyzed, and roll stability of vehicle is analyzed and evaluated. The results show that stability of vehicle roll system can be well analyzed and evaluation by the method of root locus analysis.