Chaos in Nonlinear Suspension System of Electric Vehicle

Abstract:

Based on the description of nonlinear factors, the eight degrees of freedom of EV was built. Under the sin usoidal road excitation, the responses to the model was obtained, then, the bifurcation diagram, the Poincaré section and the largest Lyapunov exponent were studied. The results indicate that the chaos exists in the system. The evolution through periodic, quasi periodic into the chaotic motions are discovered. Suspension deflections of the special point in the bifurcation diagram were studied. It is found that it could reflect the dynamic behavior of system using the changes of suspension deflections.