On the basis of analyzing the basic principle of the suspension control system, the mathematical model of the suspension control system was established. Different feedback gain coefficients were taken as the bifurcation parameters. The conditions for Hopf bifurcation to occur in the suspension control system were found according to the Hurwitz criterion, and then the relationship between feedback gain coefficients and suspension control system stability was obtained. The reseach results show as follows: ① When the values of kd and ki are finalized, kp is chosen as the bifurcation parameter and Hopf bifurcation occurs in the suspension control system when kp equals to its critical value; when kp>kpo , the system becomes unstable and when kp展开▼
