Control for vehicle semi-active suspension differential geometry theory
Abstract：In order to carry out an effective control for the semi-active suspension of an engineering vehicle, a nonlinear dynamics model for the vehicle semi-active suspension was established. A method based on the differential geometry theory and nonlinear state feedback transformation was proposed to perform the linearization for the nonlinear system of semi-active suspension. Furthermore, the optimal control of nonlinear state feedback was realized by using linear quadratic regulator （LQR）, and the simulation experiment was conducted with Matlab/Simulink programming. The simulation results show that by adopting the linearization treatment based on differential geometry theory and the linear quadratic regulator （LQR） control, the vehicle ride comfort for semi-active suspension gets enhanced obviously compared with that for passive suspension, and most ride comfort indexes have the promotion of above 10%. The analysis conclusions can provide some references for the studies in both linearization of nonlinear system and semi-active control of vehicle suspension.
Keywords：semi-active suspensiondifferential geometrylinear quadratic regulator （LQR）nonlinearitydynamicsstate feedbacklinearizationride comfort
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)