LQR control scheme for active vehicle suspension systems based on modal decomposition

A new control scheme combining the classical LQR control with modal decomposition method is presented for an active vehicle suspension system. Modal decomposition is proposed to optimize the weighted modal matrix, which gives each modal decomposition components with different weights according to their different importance. The LQR control scheme based on modal decomposition method is designed to improve anti-disturbance performance for the vehicle suspension system. Finally, simulations for a two-degree-of-freedom quarter-car model with an active suspension are given to demonstrate the effectiveness of the proposed approach compared with the passive suspension.